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Royal Air Force roundels
Royal Air Force roundels
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RAF roundel

The air forces of the United Kingdom – the Royal Navy's Fleet Air Arm, the Army's Army Air Corps and the Royal Air Force use a roundel, a circular identification mark, painted on aircraft to identify them to other aircraft and ground forces. In one form or another, it has been used on British military aircraft from 1915 to the present.

Background

[edit]
RNAS Bristol Scout C, with 1914/15-style red-ring style wing roundels

When the First World War started in 1914, it was the habit of ground troops to fire on all aircraft, friend or foe, so that the need for some form of identification mark became evident.[1] At first the Union Flag was painted under the wings and on the sides of the fuselage. It soon became obvious that at a distance the St George's Cross of the Union Flag was likely to be confused with the Iron Cross that was already being used to identify German aircraft. After the use of a Union Flag inside a shield was tried it was decided to follow the lead of the French who used a tricolour cockade (a roundel of red and white with a blue centre). The British reversed the colours and it became the standard marking on Royal Flying Corps aircraft from 11 December 1914,[1] although it was well into 1915 before the new marking was used with complete consistency. The official order stated:

All aeroplanes of the RFC to be marked on the underside and on the rudder with concentric circles similar to those on the French machines but with the colours reversed, that is with a red circle inside a blue ring. The circles to be as large as possible. In addition a Union Jack 2 ft (0.61 m) x 1 ft 6 in (0.46 m) will be painted on the wing tips outside the circles.[citation needed]

The Royal Naval Air Service specified in A.I.D. SK. No. A78 a five-foot red ring with a white centre and a thin white outline on the lower surfaces of the lower wings at mid span, from October 1914 until it was decided to standardise on the RFC roundel for all British military aircraft in June 1915.[2] With the same roundel being carried by RFC and RNAS aircraft, the use of the Union Jack was discontinued.[1] The Royal Flying Corps and its successor the Royal Air Force have employed numerous versions of the roundel since then.

By 1917, a thin white outline was usually added to the roundel, to make the blue of the outer circle easier to distinguish from the dark PC.10 and PC.12 protective dope. On squadrons operating at night there was not the same need to make the marking more conspicuous, indeed it became customary to overpaint the white ring of the roundel itself, either in the camouflage finish of the aircraft as a whole, or in red. By the end of the war this had become standardised as the so-called "night roundel" of blue and red, which continued to be used on the dark NIVO green camouflage of post-war night bombers. Most RAF aircraft now had a silver finish (either bare metal or aluminium dope) so that the national markings were conspicuous enough without outlining. During the late 1930s RAF and Fleet Air Arm (FAA) aircraft were once again camouflaged, and a new outline was introduced, this time trainer yellow, and the same width as the blue and white rings.

Use by other air arms

[edit]

Aside from the RAF, the Royal Navy's Royal Naval Air Service (First World War) and later the Fleet Air Arm as well as the air elements of the British Army all adopted the same roundels.

Many nations which had been within the British Empire and Commonwealth continued to use British roundels despite having achieved independence, including Canada, Australia, New Zealand, and India until nationalism demanded unique roundels for each of those countries.

South Africa experimented with the four flag colours briefly, but then reverted to the RAF roundel but replaced the red with orange, and then the dot with a Springbok before replacing the disk with a five pointed castle.

In Canada, the Royal Canadian Air Force changed the red dot into a silver maple leaf, while the Royal Canadian Navy adopted the sugar maple leaf and both were replaced with a geometric stylized leaf.

Australia changed the red dot to a kangaroo (both standing and running were proposed before the running variant won out) and New Zealand experimented with gold, green and white ferns inset in the red dot before settling on a red kiwi.

India briefly replaced the SEAC roundel (blue on blue) with a blue and white chakra, before adopting an orange, white and green roundel.[3]

Southern Rhodesia, the Federation of Rhodesia and Nyasaland and Rhodesia used variations on the British roundel featuring assegais before adopting a green ring with a lion and tusk on a white centre in 1970.

Roundel history

[edit]

The use of letters (A, B, C, D) to denote different versions of roundels does not come from official documents, but rather from attempts by historians in the 1950s to catalogue the various roundels being used. Official documents instead provided dimensions in inches. Since most sources now use this nomenclature it has been included here.

Ratio
1:3:5
Type A On all light-coloured surfaces 1915 to late 1929, and on dark surfaces with a 2-inch white border (similar to later type A2) on camouflaged surfaces 1915–1919. Colours used were to VB and VR specifications (with a number from 1 to 5 defining exactly which spec), colours did not change much however early versions were prone to fading.[1] Prior to the introduction of the Type B night roundel, aircraft used on night operations had the white overpainted with the prevailing camouflage colour which was usually PC.10 or black. Due to the effect of orthochromatic film – the most widely available film during World War I and onwards through the early World War II years – rendering the blue very pale, and the red very dark in photographs, historians in the 1950s and 1960s incorrectly believed a white ring roundel had been used on home defence aircraft.
Ratio
1:3:5
Type A Used after late 1929 when colours were increased in saturation until replaced by Type B during summer 1938. Official names of colours changed to "identification red" and "identification blue". As on the earlier Type A roundel, a white border was sometimes used, mainly on flying boats and some prototypes from 1923 to 1937 even when the aircraft was doped silver.[1]
Ratio
1:3:5
Type A Duller colours (referred to as "identification red (dull)" and "identification blue (dull)" in official orders), used with Type A.1 during WWII but on light surfaces, primarily under the wings of fighters until replaced by Type C in June 1942[4][5]
Ratio
1:3:5:7
Type A.1 On all camouflaged surfaces 1937 – March 1939 (e.g.: Supermarine Spitfire); on fuselage sides 1939 to replacement by type C.1, July 1942.[4] On some night bombers the white was overpainted with black to reduce visibility. Also used with bright pre-war colours, especially on trainers. The chrome yellow outermost ring on this roundel variation was usually picked up by orthochromatic film in photos as a shade of dark grey, nearly as dark as the central red circle would be. Also used as ground vehicle markings in the UK, Middle East, North Africa and Italy from January 1942 to mid-1943 as air recognition signs.
Ratio
approx.
1:3:5:6
Type A.2 Outer yellow ring is thicker than used during WWI. Alternative to A.1 on some aircraft 1940 – 1942, including the Grumman Martlet as received from the factory, indicating that it was likely official despite the lack of orders describing it.[4] Also used as ground vehicle markings in the UK, Middle East, North Africa and Italy from January 1942 to mid-1943 as air recognition signs.
Ratio
2:5
Type B On some night flying aircraft, especially heavy bombers, 1918 – 1919. (Known at this time as the "night roundel"). On all surfaces of NIVO-coloured night bombers from 1923 until NIVO phased out; Used on camouflaged aircraft in all positions from Summer 1938 until superseded by Type A.1 roundels. Used on upper surfaces of many aircraft until 1947. On fuselage sides and upper wings of overall PRU blue photo-reconnaissance aircraft 1940 – 1944 (e.g.: photo-reconnaissance Spitfires) and aircraft with "high altitude" camouflage (e.g.: de Havilland Hornet) 1944 – 1947.[4][6]
Ratio
2:5:8
Type B.1 On some aircraft March – December 1939. Used on fuselage sides of some night-flying aircraft (bombers, e.g. Vickers Wellington; night fighters, e.g., Boulton Paul Defiant) late 1940 – mid-1942. Often type B with additional yellow ring (proportions do not match Type A).[4]
Ratio
3:4:8
Type C On light surfaces July 1942 – 1947; not used on upper surfaces 1942–1945.[4]
Ratio
3:4:8:9
Type C.1 On dark surfaces except upper surfaces July 1942 – January 1945; upper wings and fuselage sides of all Second Tactical Air Force (2 TAF) bombers and photo-reconnaissance Spitfires, January 1945 to early 1947. Upper and lower wings and fuselage sides of 2 TAF fighters (e.g.: Hawker Tempest) January 1945 to early 1947.[4]
Ratio
4:8:9
(SEAC) Used by units under South East Asia Command and in the China Burma India (CBI) theatre in 1942. Red removed to avoid confusion with the Japanese hinomaru, but retained on fin flash. Not used for very long before being replaced by light blue and dark blue roundel.[7]

A blue/white roundel, sometimes with US-style white bars, was also used on Fleet Air Arm aircraft[8][9] Blue/white roundels were also used by the Royal Australian Air Force (RAAF), which simply over-painted the red dot in white, regardless of previous proportions.

Ratio
2:5
(SEAC) Used by units under South East Asia Command and in the CBI theatre mid-1942 – 1946. Red removed to avoid confusion with Japanese hinomaru. Initially red was overpainted with white but this compromised the camouflage and the normal roundel blue was mixed 50:50 with white. Many aircraft in the CBI theatre used roundels and fin flashes of approximately half the normal dimensions.
Ratio
1:2:3
Type D On all surfaces from June 1947 to this day, with similar proportions to the current roundel of the French Armee de l'Air. Colours reverted to Bright Identification colours but were matched to a new British Standard colour chart so colours were different from prewar bright colours. Note the different proportions from the Type A. The Type D was first used on ground equipment, including jeeps, and with a yellow outline on rescue launches.
Ratio
1:2:3
Type D pale A pale 'faded' version of the Type D. This was sometimes used when applied over anti-flash white. An intermediate (less faded) pale version was applied to some Vickers Valiants prior to the introduction of the definitive Type D 'faded' shading.
Ratio
1:2
Low-visibility Low-visibility roundel used on camouflaged aircraft since the 1970s (different proportions from Type B).
Ratio
1:2
Low-visibility Low-visibility roundel used in conjunction with air superiority grey schemes since the 1980s. Colours are known as "salmon pink" and "baby blue".
Ratio
1:2
Low-visibility Low-visibility roundel used on the Lockheed Martin F-35 Lightning II, with the centre being the same grey as the airframe. Unlike previous roundels, they are created in the manufacturing process of the airframe rather than painted on.[10]

Roundel sizes

[edit]

Pre-war

[edit]

Up until mid-1938, roundel sizes tended to vary widely, depending on the type of aircraft; the exception to the use of type A roundels for all aircraft was seen on the overall NIVO (a dark grey-green finish with a sheen) painted night bombers (e.g., Handley Page Heyfords) which used type B roundels. Roundels used on aircraft painted in NIVO were duller than the normal colours. The size of the roundel was generally determined by the space available at the specified location, with a space of several inches around the edges. Some aircraft – primarily seaplanes, had a white outline around the fuselage roundel, even on silver doped finishes however this application was inconsistent so was probably not official. From 1929, the RAF switched to a new system of colour specifications, discarding the one used since the First World War, and as a result, the colour used for insignia changed, however the changeover period appears to have extended until at least 1932 for new production, and the old colours were not overpainted, but only gradually phased out as aircraft needed to be repainted.

During the Munich crisis of mid- to late 1938, most RAF aircraft adopted green and dark earth camouflage with type B roundels of reduced sizes on all upper surfaces and the fuselage sides; though based on colour photos, these remained in the bright pre-war colours. FAA aircraft largely remained silver doped overall with type A roundels predominating. To illustrate the progression up to the end of the war the Spitfire will be used as a typical single seat-single engine fighter:

1938 – November 1939: The first production batches of Spitfires (aircraft registrations K9787-K9814) were built with 37.8 inches (96 cm) roundels on the fuselage sides-these were centred 39 in (990 mm) aft of the rear edge of the cockpit door. 56 inches (140 cm) type A1s were on the upper wings. From K9815, the fuselage roundels were moved back, to be centred 53 inches (130 cm) aft of the cockpit door and 6 inches (15 cm) above the main longeron, and reduced in diameter to 35 inches (89 cm) type A1. This position for the fuselage roundel was subsequently standard on all Supermarine and Westland built Spitfires and Seafires. The first 180 or so built (K9787–K9960) also had factory applied 50 inches (130 cm) type A roundels under the wings. After K9960, there were no factory applied under-wing roundels until December 1940. With the change to type B roundels Spitfires built with type A.1 roundels had were repainted by the squadrons creating a plethora of sizes and proportions.

Between K9961 and N3032, the factory paint scheme required 15 inches (38 cm) type B roundels on the fuselage sides and a 31.2 inches (79 cm) roundel with a 10 inches (25 cm) red centre on the upper wings. From N3033–P9374, it was intended that 25 inches (64 cm) type B fuselage roundels would be used, although few Spitfires saw service with roundels of this size.[11]

Most RAF aircraft went through similar transitions, as a result of which there was little conformity, depending on when the aircraft was built and how squadrons over painted or repainted the roundels.

Second World War

[edit]

By the beginning of the Second World War on 3 September 1939, RAF roundel sizes started to show more conformity. On 30 October, all commands were ordered to change upper wing surface Type B roundels to Type A. Further instructions ordered all but fighters and night bombers to have Type A under the wing tips. This was clarified in November to the effect that only reconnaissance maritime aircraft (e.g., Short Sunderland flying boats) would have the Type A on the upper wings but all aircraft would use the Type B on the sides.[12]

A decision was made to make roundels more conspicuous and, in May 1940, the yellow outer ring was ordered to be added back to fuselage sides (along with red, white, and blue stripes on the fin). Where possible, the yellow should be the same width as the blue, but on Spitfires with their narrower fuselages a thinner ring was acceptable. Also in May, an order was made to put red, white, and blue roundels on the underwings of all fighters, with an addendum that where the roundel was on a black background it should be outlined in yellow. In June, orders were given for the half black/half-white underwing scheme to be replaced by "sky"[13] Underwing roundels were dispensed with until August when they were ordered back.[14]

Because of the pressures of front-line service there were always exceptions to the standards set by the RAF and that deadlines were not necessarily met. Although type C and C.1 roundels were meant to be in use by July 1942 some Spitfires displayed type A and A1 roundels as late as October:

  • Late November/early December 1939 to June 1940: All Spitfire units were instructed to replace the type B fuselage roundels with type A roundels. This led to fuselage roundels which varied in size from 25 inches (64 cm) to 30 inches (76 cm). Upper wings had been set at 55 inches (140 cm)[15] Type B with 22 inches (56 cm) red centres until January 1945; Fuselage sides: 35 inches (89 cm) type A; no fin flash; no underwing roundels.[11]
  • June 1940 to December 1940: Spitfires with the 35 inches (89 cm) type A fuselage roundels had a yellow outer ring added, making them 49 inches (120 cm) Type A1. All Spitfires built from June had standardised 35 inches (89 cm) fuselage roundels, although many had non-standard 7 inches (18 cm) red centres applied at the Supermarine factory, instead of the specified 5 inches (13 cm). All Castle Bromwich built Spitfires had roundels with the correct 5 in (130 mm) centre spot; in addition all Castle Bromwich built Spitfires had the roundels centred 52.25 inches (132.7 cm) aft of the cockpit door and 7.5 inches (19 cm) above the main longeron. As many Spitfires as possible had type A roundels painted under the wings, along with a pale green/blue camouflage colour. The under wing roundels varied widely in size and location depending on which Maintenance Unit (MU) prepared the aircraft before delivery to the squadrons. The Spitfire 1a of 19 Squadron shown in photo 5 has 25 inches (64 cm) Type A under the wingtips, indicating it may have been processed by 6 MU.[11][16] Fin flashes were painted on starting in late May 1940. These varied in size although they were mostly 21 inches (53 cm) wide, divided in three red, white, and blue strips, and covered the full height of the tail fin.
  • December 1940 to July 1942: 35 inches (89 cm) type A1 fuselage roundels, 50 inches (130 cm) type A on lower wings. Fin flash standardised at 27 inches (69 cm) high and 24 inches (61 cm) wide, equally divided into three 8 inches (20 cm) stripes.
  • July 1942 to January 1945: 36 inches (91 cm) type C1 fuselage roundels. 32 inches (81 cm) type C lower wing roundels. Fin flash 24 inches (61 cm) square with stripe widths of 11 inches (28 cm), 2 inches (5.1 cm) and 11 inches (28 cm).[17]
  • January 1945 to June 1947: On all 2 TAF aircraft Type B upper wing roundels were either converted to 55 inches (140 cm) type C1 roundels or over-painted and 36 inches (91 cm) type C1 roundels painted on. Under wing roundels were converted to 36 inches (91 cm) type C1. The proportions of the rings and centre spot could vary depending on the skill of the painters carrying out the conversion.

Although the Spitfire is used as one example, because it was one of the few British aircraft to see front-line service before, during and after the Second World War, other aircraft types went through similar transitions. During the transition from A type to C type roundels some Hawker Typhoons displayed 42 inches (110 cm) type C1 roundels which were modified from type A1s. After June 1940 the official sizes for roundels were:

Type A From June 1940: Single and twin engine fighters, light and medium bombers, dimensions could vary but generally 50 in (1,300 mm) for lower wings.
Type A.1 From June 1940: Single and twin engine fighters, light and medium bombers 35 in (890 mm). Exceptions: Hawker Typhoon 42 in (1,100 mm), Westland Whirlwind 28 in (710 mm). Heavy bombers, transport aircraft 49 in (1,200 mm).
Type C From July 1942: Single and twin engine fighters, 32 in (810 mm). Not used on Night Bombers or de Havilland Mosquitoes.
Type C.1 From July 1942: Single and twin engine fighters, light and medium bombers, General Aircraft Hotspur and Hamilcar gliders, 36 in (910 mm). Some night intruder Hurricanes and Spitfires had 18 inches (46 cm) type C1 fuselage roundels in 1942. Heavy bombers, transport aircraft 54 in (1,400 mm).

Many variations could be seen because of the problems involved in interpreting instructions or repainting aircraft in front-line service, but most production aircraft conformed to these basic dimensions.

SEAC and RAAF

[edit]
Type D roundels on Avro Vulcans of No 617 Squadron at RAF Cottesmore, c. 1975.

In the China/Burma/India (CBI) theatre and Pacific it was thought that the red centres of RAF roundels could be confused with the red hinomaru carried by Japanese aircraft. After an RAAF No. 11 Squadron Catalina was mistaken for a Japanese aircraft by a US Navy Wildcat in the Pacific Theatre[18] and attacked, the roundels on RAAF were modified, mostly in the field, by painting over the red with white. Often the yellow outer rings of type A1 roundels were left intact. No British or American built aircraft had factory painted SEAC style roundels; all aircraft had to be repainted, and, in many cases re-camouflaged by Maintenance Units behind the lines or by front line squadrons.

When Spitfire Mk VCs reached the CBI Theatre in November 1943 their type B, C and C1 roundels were all modified by painting out the red centre spots in white, the red of the fin flash was similarly painted over. When the Mk VIIIs arrived in early 1944 most of them had their roundels overpainted completely and replaced by 16 inches (41 cm) diameter SEAC roundels with light blue centre spots (a mix of dull roundel blue and white) of approximately 7 inches (18 cm) diameter. The fin flashes were replaced by 24 inches (61 cm) high by 16 inches (41 cm) wide versions, each light blue (leading edge) and roundel blue stripe being 8 inches (20 cm) wide.

Mk VC Spitfires used by the Royal Australian Air Force over Northern Australia in October 1943 had their 36-inch type C1 fuselage roundels modified to 32 inches (81 cm) SEAC roundels by painting out the yellow outer ring in the camouflage colours and over-painting the red centre in white. The lower wing type C roundels and upper wing type Bs were also modified by over-painting the red centres in white. The red fin stripe was also painted out with white and, in many cases the blue was extended forward 1 in (25 mm) making equal widths of 12 inches (30 cm). RAAF Mk VIIIs had their roundels and fin flashes modified in the same ways, although some had their 55 inches (140 cm) upper wing roundels overpainted and replaced with 32 inches (81 cm) SEAC roundels.

Fin flash

[edit]
Avro Vulcan XM607 with the low-visibility fin flash
Handley Page Victor circa 1961 in anti-flash white with the pale fin flash.
USAAF aircraft with RAF fin flashes

All current Royal Air Force aircraft carry a flash on the fin. This is either red/white/blue, or red/blue, the latter normally being used on camouflaged aircraft, with the red stripe forward. Aircraft painted anti-flash white in the nuclear strike role had a pale pink and blue flash, the same shades as the roundels, to reflect some of the thermal radiation from a nuclear explosion.

The Royal Navy and Army do not use the fin flash but have the words ROYAL NAVY or ARMY on the rear fuselage or fin instead. An exception to this was the Harrier GR7s and GR9s of the Naval Strike Wing, which carried similar markings to RAF Harriers. The fin flash can be rectangular, slanted or tapered, depending on aircraft type.

In a situation similar to that of the roundels, the fin flash was also shared with the air forces of Australia and New Zealand.

The fin flash evolved from the rudder stripes painted on the rudders of early RFC and RAF aircraft during the First World War, the markings being blue, white and red vertical stripes on the rudder. The fin flash of RNAS, RFC and RAF aircraft of the First World War was applied with the blue stripe forward. This orientation continued through to the late 1920s when it was reversed to have the red stripe forward in the order used through WW2 up to the present day. When applied to night bomber aircraft the red/blue fin flash was also blue forward through this period.

With the performance of aircraft increasing considerably during the 1930s, the practice of applying painted markings onto the (then manually powered) control surfaces was generally discontinued because of the need to rebalance the controls – failure to do this could have adverse effects on the surface's balance, possibly leading to flutter of the control surface at high airspeeds. It was for the same reason that the positioning of the wing roundels was revised so that they no longer encroached upon the ailerons.

In an attempt to conform to the appearance of French military aircraft, rudder stripes reappeared on aircraft (mainly Fairey Battles and Hawker Hurricanes) of the RAF based in France, starting in early September 1939. These stripes were painted in standard RAF colours in the order blue, white, red.

Fin flashes were officially adopted in June 1940. For the first six months there was no conformity in the width or height of the stripes and they were painted to cover as much of the fin area as possible. With occasional exceptions the order was red (leading edge), white, blue. In December 1940 type A fin flashes were standardised with a height of 27 in (690 mm), and an overall width of 24 in (610 mm), divided into three 8 inches (200 mm) red, white and blue stripes (e.g.: photo six, the Sea Hurricanes show this standardised fin flash). On some aircraft, e.g.; photo reconnaissance Spitfires the fin flash was about half these dimensions.

In July 1942, with the adoption of the type C and C1 roundels the fin flash became a 24 inches (61 cm) square for RAF fighters, the stripe widths becoming 11 inches (28 cm) red, 2 inches (5.1 cm) white and 11 inches (28 cm) blue.[17] There were some exceptions; RAF North American Mustangs all used fin flashes which were 27 inches (69 cm) high by 24 inches (61 cm) wide. In early 1944 some aircraft types were painted in a "High-altitude" camouflage scheme and adopted type B roundels and fin flashes.

The then-current RAF fin flashes were also adopted for USAAF aircraft operating alongside British and Commonwealth forces in the Mediterranean theatre in 1942, appearing on US Curtiss P-40 Warhawk fighters and North American B-25 Mitchell bombers, as well as on USAAF Consolidated B-24 Liberators flying from North Africa on attacks such as 1943's Operation Tidal Wave.

Colours

[edit]

Roundel and fin-flash colours changed several times during the First World War because of severe problems with fading. The third standard (VB3 and VR3) would be used until the early 1930s when much brighter colours replaced the red and blue at the same time that rudder stripes were omitted. The red and blue were both duller and less saturated than later versions and varied considerably as paint was usually mixed locally. The actual switchover began in 1929 but new aircraft were still being delivered in 1932 with the earlier colours.

For the period from the early 1930s until 1938, Roundel Red was close to FS 595 21136 and the Roundel Blue was slightly lighter and brighter than FS 595 15056. Trainer Yellow was close to FS 595 23538. Photo 2, a restored Bristol F.2 Fighter is a fairly good representation of the late interwar colours. On fabric covered aircraft these were glossy (as was the general finish) until dulled with age, even during the First World War.

In 1938, with the threat of war looming, new markings colours were introduced along with camouflage. The blue was darker, becoming similar to FS 595 25050 while the red became a slightly brownish brick-red, about FS 595 20109. The trainer yellow stayed the same shade but all colours were now matte. These colours remained standard for another eight years.[19] To further complicate matters, old stocks continued to be used up. A series of colour photos of a Miles Master show wing and fuselage roundels (C and C1) in dull colours, while the fin flash remains in the bright pre-war colours, albeit with the later proportions. Other colour photos show a mixture of bright and dull colours being used on the same insignia, though all instances found have been of trainers.

Post-war colours were specified by the new BS 381 colour standard and approximate the late pre-war colours except for special cases, such as anti-flash markings and the current low visibility markings. The old blue colour, Aircraft Blue on BS381c was BS108. A new colour BS110, Roundel blue, made on Phthlalocyanine blue, was introduced in the early 1960s to improve weather fastness.

[edit]
The Who performing in front of roundels

Roundels in general and the RAF roundel in particular have been associated with pop art of the 1960s, appearing in paintings by Jasper Johns and British artist Sir Peter Blake. It became part of the pop consciousness when British rock group The Who wore RAF roundels (and Union Flags) as part of their stage apparel at the start of their career. Subsequently it came to symbolise Mods and the Mod revival. The roundel is often used on clothing of the Ben Sherman brand.

[edit]

See also

[edit]

References

[edit]
[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia
from Grokipedia
The roundel is a distinctive circular national marking applied to RAF aircraft, consisting of concentric rings in blue, white, and red that symbolize British identity and aid in visual identification during flight operations. Originating from the need for clear aerial recognition during , it was adopted by the Royal Flying Corps on 11 December 1914, initially on underwing surfaces to differentiate British planes from German aircraft bearing the . The design draws direct inspiration from the French revolutionary cockade—a tricolour of , , and —but reversed the color order ( outermost, then , center) to avoid with Allied French markings while maintaining a simple, high-contrast form visible at distance. Early versions, known as Type A, followed a 1:3:5 ratio (::) and were painted on wings and fuselages from 1915 until the early 1940s, though initial experiments with markings proved ineffective due to with German aircraft markings such as the . By 1917, a thin border was added to the outer ring on some aircraft to enhance contrast against schemes. During , designs evolved rapidly for operational needs, with multiple types introduced to balance , visibility, and production efficiency. Type A1, featuring an outer ring (1:3:5:7 ratio), appeared in for better definition on camouflaged surfaces and remained in use on fuselages until 1942. Type B, a simplified -and-red version without (2:5 ratio), was applied to upper wings from 1938 and persisted until 1947, particularly on in PRU Blue paint. The standardized Type C (3:4:8 ratio with reduced ) debuted in May 1942 for undersides, while Type C1 added a thin surround for fuselages; these addressed combat visibility issues, such as removing elements in some cases to reduce targeting risk. In the Command (SEAC), variants from 1942–1946 omitted the red center to prevent confusion with Japanese hinomaru markings, substituting or other hues. Post-World War II, the RAF transitioned to the simpler Type D roundel (1:2:3 ratio), which became the standard from the late onward, emphasizing streamlined application on jet-age while retaining the core tricolour motif. Low-visibility gray versions emerged in the 1980s for modern , but the full-color Type D persists on ceremonial and operational today, including recent additions like the E-7 Wedgetail, underscoring the roundel's enduring role in RAF heritage and identification.

Origins and Background

Historical Context

In the early , faced significant challenges due to the absence of standardized markings, which often resulted in confusion during operations and contributed to incidents at the outset of . Ground forces frequently fired upon unidentified , as there were no clear visual distinctions between friendly and enemy machines in the nascent aerial domain. This issue was exacerbated by the rapid expansion of air forces, where pilots and observers struggled to differentiate amid the chaos of combat. The formation of the Royal Flying Corps (RFC) on 13 April 1912 marked a pivotal step in addressing these deficiencies, establishing a dedicated British military aviation branch with military and naval wings under army control. Prior to this, experimental markings on British aircraft were limited to serial numbers painted on fuselages, which proved inadequate for quick identification in dynamic combat environments, especially from the ground or at distance. The outbreak of World War I in 1914 intensified the need for national insignia to clearly differentiate British aircraft from German ones, whose black crosses could be mistaken for Allied designs under certain lighting or angles. Initial attempts, such as painting Union Jacks on wings, were abandoned due to similar visibility issues and potential confusion with enemy symbols. A key development occurred in late 1914 when the RFC adopted a reversed version of the French tricolor cockade—a outer circle with and inner rings—for better Allied , first appearing on undersurfaces on 11 1914. This circular design enhanced visibility from multiple angles compared to rectangular flags. Standardization of markings among Allied forces progressed in 1915, with the adoption of tricolor cockades inspired by the French republican emblem to promote mutual recognition among coalition . By mid-1915, roundels were routinely applied to rudders and wings of British machines, evolving into the foundational marking for what would become the Royal Air Force.

Initial Adoption

The Royal Air Force (RAF) was established on 1 April 1918 through the merger of the Royal Flying Corps (RFC) and the Royal Naval Air Service (RNAS), with the selected as a unifying national marking to standardize aircraft identification across the new service. This adoption addressed the inconsistencies in pre-merger insignia, where the RFC used a blue-white-red since 1914 and the RNAS employed similar but occasionally varied designs, ensuring a single symbol for operational cohesion during the final months of . The roundel's design comprised concentric circles—blue outermost, white middle, and red innermost—directly inspired by the French national cockade but with colors reversed to evoke the Union Jack's palette, facilitating quick visual distinction from enemy markings while aligning with Allied aesthetics. This choice prioritized simplicity and visibility, drawing on the RFC's established practice to minimize retraining for ground crews and pilots amid the urgent demands of wartime production. Shortly after the RAF's formation, the Air Ministry issued an order in April 1918 mandating roundels on all aircraft, superseding the diverse RFC and RNAS markings such as serial numbers, squadron codes, and naval ensigns to promote uniformity and reduce friendly fire incidents. The directive specified the Type A roundel as the standard, characterized by concentric annular bands in the prescribed colors following a 1:3:5 diameter ratio (red:white:blue), applied to the upper and lower surfaces of both wings and the sides of the fuselage for omnidirectional recognition. In the transitional phase from late to mid-1918, as aircraft shifted to disruptive patterns, hybrid markings emerged, including RFC-style roundels outlined with white borders to improve contrast against mottled finishes and bridge the gap until full RAF . These adaptations ensured continuity in identification during the merger, with the white border serving as a temporary enhancer rather than a permanent feature.

Design and Specifications

Color Composition

The Royal Air Force roundel features three concentric circles, with the outer ring in , the middle in , and the inner in . Traditional Type A roundels used unequal widths in a (red:white:), while the modern Type D standard employs a for streamlined application. The is specified as Roundel Blue (BS 381C No. 110), a medium-dark shade with approximate sRGB values of 64, 74, 114 (hex #404A72), often matched to 286 C in design contexts for consistency. The is pure white without a specific BS designation for markings, typically rendered as sRGB 255, 255, 255 (hex #FFFFFF). The is Cherry Red (BS 381C No. 538), a vibrant with sRGB values of 157, 56, 58 (hex #9D383A). These colors maintain proportional widths as per the applicable type in standard high-visibility applications. The selection of red, white, and blue reflects elements of the Union Jack, symbolizing British national identity, while the circular arrangement and reversed order (blue outermost) derive from the French tricolour cockade to distinguish British aircraft from Allied French ones during early adoption. This adaptation ensured clear identification in combat without adopting a direct flag motif, prioritizing aerial visibility over literal heraldry. Post-World War II, the British Standards Institution formalized these hues in the BS 381C specification (1948 edition), providing standardized pigments for aircraft paints to ensure uniformity and weather resistance. Revisions in the 1960s enhanced durability through improved formulations, such as better UV stability for prolonged exposure. During the 1940s, wartime exigencies prompted a shift to toned-down, matt variants—using desaturated "Identification Blue" and "Identification Red" for camouflage integration on upper surfaces—before reverting to the brighter BS 381C standards postwar for enhanced recognition. In modern contexts post-2010, digital reproductions employ RGB/hex codes like those above for graphics and simulations, facilitating precise rendering in software. Low-visibility variants, introduced for grey schemes, substitute pale shades: Pale Roundel Blue (BS 381C No. 172, sRGB 152, 182, 210; hex #98B6D2) and Pale Roundel Red (BS 381C No. 454, sRGB 232, 161, 162; hex #E8A1A2), reducing contrast. For stealth operations on like the F-35 II, greyscale iterations match the airframe's uniform medium grey (e.g., approximate 128, 128, 128; hex #808080), minimizing and visual signature while retaining identifiability.

Size and Placement Guidelines

The size and placement of Royal Air Force roundels on are standardized to ensure visibility and identification while accommodating the structural and aerodynamic characteristics of different types. Sizes vary by aircraft type and era, often specified as fixed diameters in Air Ministry Orders (e.g., 32–56 inches for wing roundels on fighters, 26 inches for pre-war fuselage roundels), scaled for larger bombers. These ensure detectability at operational ranges, with tolerances for manufacturing and painting processes. Placement follows specific conventions for optimal visibility: full Type A roundels (red, white, and blue) are applied to the upper and lower surfaces of the wings, centered between the leading and trailing edges where space permits. On fuselage sides, full Type A roundels are positioned midway between the and tail, one on each side, to aid side-on identification. Tail markings, when applicable, use smaller roundels or fin flashes on the or , aligned with the aircraft's centerline. For biplanes, diagrams in pre-1939 specifications illustrate staggered placement on upper and lower wings to avoid interference with and rigging, whereas monoplanes feature more centralized positioning on broader wing surfaces. In post-2000 applications for fast jets like the , guidelines adapt for canard configurations and low-observable coatings, incorporating asymmetric placements on forward canards and reduced-contrast roundels to minimize radar cross-section while maintaining NATO-standard identification.

Historical Evolution

World War I and Interwar Period

The Royal Air Force roundel made its debut during on 11 December 1914, when the Royal Flying Corps adopted the Type A design—a concentric arrangement of , white, and red circles—as the standard identification marking for aircraft, primarily applied to underwing surfaces to aid recognition in aerial combat. This marking drew inspiration from the French cockade and was intended to prevent incidents amid the chaos of early . By 1917, as evolved with the application of dark PC.10 or PC.12 dope on fabric surfaces, a thin white outer ring was added to the Type A roundel to enhance contrast against these subdued backgrounds, improving visibility without compromising the overall design. During the from the to , the design achieved notable stability, with the Type A remaining the standard for upper and lower wing surfaces due to its full tri-color composition and balanced proportions. On sides, the Type B variant was commonly employed, featuring adjusted ratios (approximately 5:2 for blue to red) to fit the narrower space while maintaining recognizability, though without the white outer ring on non-camouflaged areas. This configuration saw minimal alterations throughout the era, reflecting a period of peacetime consolidation before the rearmament drive of the late ; the markings were applied consistently across RAF types, emphasizing continuity in national identification. A key development occurred in 1937, when the Air Ministry issued an order standardizing roundel sizes specifically for the Hawker Hurricane and prototypes, specifying dimensions such as 32-inch fuselage roundels to ensure uniformity in production and operational deployment as tensions escalated in . Interwar experiments also explored enhancements for specialized roles, including yellow outlines around roundels on night fighters to improve low-light visibility, though these were not widely adopted due to concerns over glare and integration. In colonial operations, RAF stations in and the during the 1920s adapted roundel sizes to larger dimensions—often up to 40 inches on wings—to counter visibility issues caused by dust and sand, facilitating identification in arid environments where standard markings could become obscured.

World War II Variations

During , the Royal Air Force adapted its roundel markings to address wartime operational needs, prioritizing camouflage effectiveness, visibility for identification, and theater-specific requirements. In response to the intense air battles of and in 1940, the RAF reduced the contrast and size of upper wing roundels to minimize detection by German aircraft from above. This led to the widespread use of Type B roundels on upper wings—consisting of only blue and red circles without the white ring for lower visibility against camouflaged surfaces—while maintaining full Type A1 roundels with yellow outer surrounds on fuselages and lower wings to enhance recognition by ground observers and Allied forces. These modifications balanced concealment with the need for quick friend-or-foe identification amid high-threat environments. By May 1942, the Type C roundel became standardized across most RAF aircraft, featuring a more compact design with ratios of 3:4:8 for blue, white, and red with reduced white width; Type C1 added an optional yellow outer ring, further refining visibility on camouflaged airframes. Theater-specific variations emerged to suit environmental and tactical conditions. In the (SEAC), operating in jungle and monsoon environments from 1942 onward, the RAF adopted high-contrast blue-and-white roundels without the red center to prevent confusion with Japanese hinomaru markings; these were larger for better visibility in humid, low-light conditions. In September 1943, following trials prompted by near-miss incidents with Allied aircraft, the white ring was modified to "India White"—a pale blue-tinted mix (four parts white to one part blue)—to improve distinction against tropical schemes while retaining the blue center for emphasis. In the Mediterranean Theater, RAF photo-reconnaissance aircraft like Spitfires employed "desert pink" (PRU Pink) overall, with standard Type C roundels integrated into the scheme to blend with North African sands during high-altitude missions, though the pink hue sometimes toned the roundel edges for subtlety. Lesser-known adaptations included specialized applications on certain aircraft types. On de Havilland Mosquito variants with clipped wings—modified for improved low-level maneuverability in night intruder and roles—the roundels were sometimes trimmed or repositioned to conform to the altered elliptical wingtips, maintaining Type C proportions but avoiding interference with structural changes. These variants exemplified the RAF's flexible approach to markings, ensuring operational efficacy without compromising the core design.

Post-War and Modern Adaptations

Following the end of , the Royal Air Force adopted the simplified Type D roundel (1:2:3 proportions for red, white, and blue) in 1947 per Order A.413/47 dated 15 May 1947, which differed from the pre-war Type A (1:3:5) in its streamlined ratios while restoring peacetime identification standards to all surfaces. The colors were initially based on wartime specifications but were formalized under British Standard (BS) 381C in 1948, which expanded the palette to 91 shades and defined Red (BS 538) and Roundel Blue (initially BS 108, later updated to BS 110 in the early 1960s for improved pigment stability). During the Cold War era from the 1960s to the 1980s, the Type D maintained consistency across RAF aircraft, appearing on strategic bombers like the Vulcan, Victor, and Valiant in schemes from 1955 to 1964 for nuclear deterrence roles. However, by the 1970s, low-visibility variants emerged to reduce detectability on camouflaged aircraft, with the Type D —featuring faded shading in pale red and blue—introduced for operational effectiveness in contested environments. In the 1990s, as RAF aircraft shifted to overall grey schemes for better air defense integration, the modern low-visibility Type D was standardized on platforms like the GR and Harrier, with mid-to-late 1990s applications on variants painted in darker Light Aircraft Grey to minimize visual and radar signatures. In the , adaptations have emphasized stealth and multi-spectral compatibility, particularly post-2010 with the introduction of low-observable roundels on the and F-35B Lightning II. These use subdued pale tones integrated with radar-absorbent materials and multi-spectral paints that reduce visibility across visual, infrared, and radar spectra without compromising identification. On the F-35B, the roundel is embedded within the aircraft's stealth skin rather than applied as traditional paint, supporting carrier operations on Queen Elizabeth-class ships where placement adheres to low-observability guidelines for STOVL missions. Recent joint operations in the 2020s have seen flexible use of these markings, balancing stealth with visibility needs in multinational exercises. The full-color Type D persists on modern aircraft, including the E-7 Wedgetail alliance aircraft unveiled in 2024.

Uses by Other Air Arms

Commonwealth and Allied Forces

During , air forces from the British Commonwealth, including the Royal Canadian Air Force (RCAF), (RAAF), and (RNZAF), adopted identical RAF roundels for their aircraft operating under Article XV squadrons. These squadrons, formed as part of the , were integrated into RAF operations, with personnel from the respective nations manning aircraft that bore standard RAF markings such as Type A, B, and C roundels to ensure uniformity in identification during joint campaigns. For instance, RCAF squadrons like No. 436 used Type C roundels on Dakotas in , while RAAF and RNZAF units applied similar variants on fighters and bombers to align with RAF standards. Post-independence, several Commonwealth air forces retained or modified RAF roundels as they transitioned to national identities. The continued using the standard RAF-style roundel immediately after 1947 but introduced an interim variant in 1948, incorporating the emblem within the blue outer ring until 1950, when it adopted a permanent tricolor design with the at the center. Similarly, the RAAF modified its fuselage markings post-war by retaining the Type B low-visibility roundel on some into the early 1950s before shifting to kangaroo-inscribed versions, reflecting ongoing ties to RAF specifications. The employed RAF roundels during the East African campaigns of 1940-1941, marking like Hurricanes in operations against Italian forces, prior to replacing them with emblems starting in 1950 for greater national distinction. In post-colonial contexts, air forces in newly independent nations like and maintained RAF-style s into the 1970s as they built their capabilities. The Royal Malaysian Air Force, formed in 1958, used a blue-white-red with a central yellow star from 1963 until 1982, directly echoing RAF design principles during its early reliance on British equipment and training. The , established in 1968 as the Singapore Air Defence Command, initially adopted a modified RAF by replacing the outer blue ring with red to incorporate national colors, retaining this red-white-red version until 1973 when it transitioned to a yin-yang inspired .

Contemporary Successors

Within , RAF roundels align with allied standardization efforts for aircraft markings, emphasizing consistent sizing and positioning to facilitate interoperability among member states, though national designs vary. For instance, the Air Force's star-in-circle insignia evolved from early roundels influenced by British and French models, transitioning to a distinct white-star-on-blue-disc with bars by to reflect U.S. colors while retaining circular elements for aerial recognition. Several allied air forces continue RAF-inspired roundel adaptations in contemporary roles. The employs a circular maroon-gold-white on its aircraft, such as the . In the 2020s, RAF have appeared prominently on transport aircraft during humanitarian missions in the , such as the C-17 Globemaster III delivering aid to Gaza via in 2023, where the markings aid in neutral identification amid conflict zones. Additionally, unmanned systems like the Watchkeeper WK450 tactical UAV, operational since 2018 and used by the , bear RAF roundels on wings and to denote British military affiliation during surveillance tasks.

Fin Flash

The fin flash serves as a complementary tail marking to the , providing rapid visual identification of aircraft from the rear, particularly for ground observers during flight operations. This design evolved from World War I-era rudder stripes on and early RAF aircraft, which used blue, white, and red vertical bands for similar recognition purposes to prevent incidents. By , amid escalating aerial combat in , the fin flash was formalized as a distinct marking on the rather than the , reflecting the need for clearer rearward visibility without compromising control surfaces. The standard design consists of three vertical stripes in red, white, and blue, arranged from the aft (red forward, blue at trailing edge), using the same colors as the for consistency. Introduced on May 1, 1940, and standardized by Air Ministry Order A.926/40 on December 12, 1940, the marking was initially applied at two-thirds the height of the fin to ensure prominence without overpowering the tail structure. During , it measured 27 inches high by 24 inches wide, divided into three equal 8-inch-wide stripes, and was positioned with the red stripe forward for optimal visibility from behind. Post-war adaptations enlarged the fin flash proportionally for with larger tail surfaces, maintaining the three-stripe configuration while scaling dimensions to fit modern designs. A low-visibility variant in medium sea grey, with subdued red, white, and blue shading, was adopted in 1993 for camouflage-painted aircraft to reduce detectability in low-level operations, though full-color versions persisted on trainers and non-combat types. Modern variants include asymmetric placements on aircraft such as the , where the flash is offset or truncated to accommodate the swiveling nozzles and maintain aerodynamic balance during vertical maneuvers, ensuring the design remains functional without altering core identification elements.

Additional Insignia

In addition to the primary , aircraft have employed various supplementary markings to identify individual airframes, squadrons, and operational roles. serial numbers, introduced shortly after the RAF's formation in , follow a standardized format consisting of a letter prefix followed by sequential numbers, evolving to a two-letter prefix and three digits (e.g., AA811) from 1940 onward. These serials are typically painted on the rear , positioned aft of the roundel for clear visibility during ground operations and maintenance. Prior to 1940, unit identification relied on squadron codes painted as large letters on the sides, consisting of two letters denoting the squadron and a third indicating the specific aircraft within the unit (e.g., FD·B for No. 114 Squadron). These codes, introduced in March 1939, facilitated rapid recognition in and on the ground, often in medium sea grey or white for contrast against schemes. They were phased out for most squadrons by mid-1940 in favor of simplified individual letter identifiers amid wartime exigencies. Special temporary markings have been applied over standard insignia in high-risk scenarios, such as the black-and-white invasion stripes introduced on June 4, 1944, just prior to D-Day. These consisted of five alternating bands—three white and two black, each 18 inches wide on single-engine aircraft—painted on wings and fuselages of RAF fighters, bombers, and transports to mitigate friendly fire incidents during the Normandy landings. The stripes were hastily applied using distemper paint and removed by late 1944 as the immediate threat diminished, serving as overlays rather than permanent features. For training units, colored flashes or bands, such as red or yellow chevrons on forward fuselages, denoted operational status or instructor aircraft from the interwar period through the 1950s, though less standardized than combat markings. Following the 1950s, RAF aircraft integrated roundels with NATO-aligned identification systems, including serial numbers and abbreviated unit codes painted in low-visibility formats on undercarriage doors and gear struts for during joint exercises. This practice, emphasizing subdued grays and blacks to reduce and visual signatures, became standard on fast jets like the and persists on modern platforms such as the . In recent decades, adaptations for unmanned aerial vehicles (UAVs) have included low-visibility serials in slate gray since the early , applied to assets like the Watchkeeper WK450 to minimize detectability in contested environments.

Cultural Impact

Representations in Media

The Royal Air Force roundel has been a recurring visual motif in media portrayals of , particularly in films depicting events, where it serves to authenticate British aircraft and underscore themes of heroism and alliance. In the 1969 film Battle of , directed by , the roundels are prominently and accurately displayed on Supermarine Spitfires and Hawker Hurricanes, utilizing the period-correct Type A (full color) and Type B (reduced white) variants to mirror the historical markings from the campaign. This attention to detail in contributed to the production's use of over 100 real vintage planes, enhancing the realism of sequences and earning praise for its fidelity to RAF standards. Conversely, the 2001 film , directed by , incorporates inaccuracies in its representation of Allied aircraft markings, notably by featuring a Supermarine adorned with the "RF" code of the Polish No. 303 Squadron, which blends British designs with non-RAF Allied identifiers in scenes involving American volunteers. This mixing of US and UK-style markings deviates from the distinct national insignias used by RAF and USAAF units during the early war, prioritizing dramatic narrative over precise historical differentiation in joint operations. Such errors highlight common challenges in Hollywood depictions where visual shorthand for "Allied" forces can obscure specific service branch identities. In video games focused on historical flight , the RAF appears with customizable historical variants, allowing players to recreate authentic scenarios. Titles like IL-2 Sturmovik include detailed renditions of RAF , with options for accurate colorations such as the duller reds and blues introduced mid-war for effectiveness, enabling immersive multiplayer battles featuring British fighters. Similarly, offers a wide array of RAF types, from early Type A full-color versions to later low-visibility adaptations, which players can apply to aircraft like the Spitfire or Hurricane for squadron-based customization and historical accuracy in online modes. The also functioned as an iconic element in propaganda posters, symbolizing RAF prowess and Allied solidarity against Axis aggression. British Ministry of Information posters, such as those archived by the , prominently displayed the Type A roundel alongside imagery of pilots and to rally public support and recruitment, reinforcing the emblem's role as a unifying badge of defiance and technological superiority.

Symbolic Legacy

The roundel serves as a cornerstone of heritage, prominently featured in museum exhibits that preserve the organization's aviation legacy. At the RAF Museum, numerous displays, such as the models and prototypes adorned with classic blue, white, and red roundels, illustrate the evolution of RAF identification markings and their role in historical operations. These exhibits educate visitors on the roundel's origins and enduring significance, drawing millions annually to sites like and Cosford locations. Similarly, the maintains a fleet of historic —including Spitfires, Hurricanes, and a Lancaster bomber—all bearing authentic RAF roundels to honor the sacrifices of . This flight participates in over 100 public and ceremonial events each year, ensuring the roundel's visibility in demonstrations. As a , the RAF embodies British air power during state ceremonies, most notably in the annual flypasts. In the 2025 King's Birthday Flypast, 29 RAF aircraft, including those from the , streamed over with their distinctive roundels clearly visible, underscoring the RAF's role as a guardian of under the monarch's command. These formations, watched by crowds along The Mall, reinforce the roundel's association with unity and defense, a tradition dating back to interwar pageants. The 's design has profoundly influenced , establishing the concentric circle format as a standard for quick aerial identification in over 80 percent of the world's air forces. Originating from French cockades but refined by the RAF in 1915, it inspired adaptations in nations like , which incorporated similar markings during joint operations to facilitate allied recognition. Today, more than 50 countries employ roundel variants, reflecting the RAF's foundational impact on international symbology. In contemporary contexts, the roundel continues to symbolize inclusive legacy through RAF commemorations and diversity efforts. The VE Day 80th flypast featured historic and modern RAF jets with . These efforts, supported by the RAF Benevolent Fund, promote the roundel as a marker of shared heritage and resilience across nations.

References

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