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IAR 80
IAR 80
from Wikipedia

The IAR 80 was a Romanian World War II low-wing monoplane, all-metal monocoque fighter and ground-attack aircraft. When it first flew, in 1939, it was comparable to contemporary designs being deployed by the airforces of the most advanced military powers such as the Hawker Hurricane and Bf 109E.[2] Production problems and lack of available armament delayed entry of the IAR 80 into service until 1941. It remained in frontline use until the end of the war.[3]

Key Information

Development

[edit]
IAR-80 undergoing maintenance

In order to ensure that the Royal Romanian Air Force (ARR) could continue to be supplied with aircraft in time of war, the government subsidized the creation of three major aircraft manufacturers in the 1920s and 1930s. The first was Societatea Pentru Exploatări Tehnice (SET) which was formed in Bucharest in 1923. Next came Industria Aeronautică Română (IAR) which set up shop in Brașov in 1925. Finally there was Întreprinderea de Construcții Aeronautice Românești (ICAR), which was founded in Bucharest in 1932.

In 1930 the Romanian government issued specifications for a new fighter. Although the government was not anticipating bids from its own aircraft industry, IAR produced several prototypes in response to the tender.

The contract was eventually won by the Polish PZL P.11. The ARR purchased 50 of a modified version called the P.11b, all of which were delivered in 1934. A second contest was also fought between the newer IAR 14 and PZL P.24 designs, and once again the PZL design won a contract for another 50 aircraft.

Although IAR's own designs had not entered production, they nevertheless won the contracts to build PZL fighters and Gnome-Rhône 14K engines under license. As a result of these and other licence contracts the company had enough money to fund a design studio even if its designs never went into production.

Despite losing to PZL, an IAR design team led by Ion Grosu continued work on fighter designs. He was convinced that the low-wing design of the IAR 24 represented a better design than the PZL gull-wing design, which was often referred to as the "Polish wing". Once again the team studied the new PZL fighter looking to incorporate its best features into a new aircraft, and the result was the IAR 80.

Design

[edit]
IAR 80 side view
  • Description: Low-wing monoplane fighter with conventional control surface layout.
  • Fuselage: The fuselage was circular in cross-section, turning to egg-shaped behind the cockpit where it incorporated a ridge-back. The rear fuselage layout, and the engine cowling were based on the Polish PZL P.24.[4]
  • Wings: The wings were tapered with rounded tips, the trailing edge angled very slightly forwards. Small flaps ran from the fuselage to a point about 1/3 along the span, where the ailerons started and extended out to the rounded wingtips.
  • Other details: A bubble canopy was fitted, sliding to the rear to open, providing excellent visibility except over the nose due to its rearward position. A conventional tailwheel landing gear was used, with the main gear wide-set and retracting inward, with a non-retractable tail skid.

The semi-monocoque tail was copied directly from the PZL P.24. The fuselage from the engine back to the cockpit was new, consisting of a welded steel tube frame covered with duralumin sheeting. The wings were mounted low and were of the same design as those used on the early IAR 24, which had competed with the PZL P.24.

According to an urban legend, the wing profile was copied from the Italian Savoia-Marchetti SM.79 bomber, in service with the ARR at the time, as the design team lacked the time for wing section studies. As a result, the profile was less favorable for higher speeds, but gave the aircraft more maneuverability. This is false as the contract for the SM.79B licence was signed on October 1, 1938, roughly one year after the I.A.R. 80 prototype was completed.[5]

The cockpit's interior, instruments, and gunsight were imported from foreign suppliers. This effort to aggregate a fighter from various sources was a result of the last-minute demands for a frontline fighter. The initial IAR 80s were fitted with iron sights. Starting with the 21st aircraft, these were replaced by Goerz GM2 reflector sights which were manufactured under license by Întreprinderea Optică Română as the "Telereflex" gunsights.[6]

A Luftwaffe major who tested it in March 1941 had this to say about the IAR 80:

Takeoff and landing are very good. It's 20–30 km/h slower than the Bf 109E. The climb to 5,000 meters is equivalent. In a dogfight, the turns are also equivalent, although the long nose reduces the visibility. In a dive it's outclassed by the Bf 109E, because it lacks an automated propeller pitch regulator. It's a fighter adequate to modern needs.[7]

Prototypes

[edit]

Work began on the IAR 80 prototype in late 1937, originally with an open cockpit and the 870 hp (650 kW) IAR K14 IIIc32 engine which was a licensed Gnome-Rhône 14K II Mistral Major. The prototype was completed slowly, and first took to the air in April 1939. Test flights of the prototype were impressive; the aircraft could reach 510 km/h (320 mph) at 4,000 m (13,000 ft), service ceiling of 11,000 m (36,000 ft) with the ability to climb to 5,000 m (16,000 ft) in 6 minutes,[8] which was respectable at the time, though not up to the contemporary Supermarine Spitfire or Messerschmitt Bf 109 fighters. In comparison the PZL P.24E was almost 450 kg lighter, yet over 80 km/h slower with the same engine. The IAR 80 also proved to be enjoyable to fly and was maneuverable.

IAR 80 cockpit

A number of minor problems turned up during the prototype phase, and were dealt with over the next year. To improve power the design was updated to mount the newer 930 hp (690 kW) IAR K14 IIIc36. However this engine was slightly heavier than the IIIc32, which required the rear fuselage to be stretched to move the center of gravity back into the proper position. The extra space in the fuselage allowed the fuel tanks to be increased in volume to 455 L (100 imp gal). The wing was also enlarged and the tail was revised to eliminate the bracing struts.

A side effect of this extreme rearward position was that the pilot had even worse forward visibility while taxiing than most other taildraggers. To address this somewhat, the pilot's seat was raised slightly and a bubble canopy was added.

The updated prototype was tested competitively against the Heinkel He 112, which had arrived in Romania as the start of a potentially large order. Although the He 112 was more heavily armed with two machine guns and two 20 mm cannon, the IAR 80 proved to be a better design and the ARR ordered 100 IAR 80s in December 1939 while only 30 He 112s were accepted. The government in Bucharest ordered another 100 IAR 80s in August 1940. Further orders for batches of 50 IAR 80s followed on 5 September 1941 and 11 April 1942, then another 100 on 28 May 1942, to be followed by 35 of the IAR 81C development in February 1943, with a further 15 in January 1944.[8]

IAR 80

[edit]

Production of the IAR 80 started immediately, although the armament proved to be a serious problem. The prototype had mounted only two Belgian-made Fabrique Nationale 7.92 mm machine guns, a licensed modification of the Browning .30 cal. This armament was not heavy enough against modern aircraft, and the production model was expected to mount six. The German invasion of Belgium in 1940 suspended the supply from FN, and there was no suitable replacement.[9] The first aircraft began production in January 1940, and by 10 July the first IAR 80 took flight, followed by the 2nd on 19 July. The first five aircraft were ready to be delivered in November, with the first batch of 20 being delivered by the middle of February 1941. By April, all 50 initially ordered IAR 80s were delivered.[6] The armament supply remained inadequate so production models only carried four guns.

The initial batch of fighters was well received by the Romanian pilots, but they found the aircraft underpowered and lacking firepower. In order to address this, the aircraft mounted the 960 hp (720 kW) IAR K14 IVc32 engine in the 21st through 50th examples, but the firepower concern could not be resolved at the time.

IAR 80A

[edit]

By April 1941 Romania was firmly in the German sphere of influence, and as a result the Germans released more FN guns for its use. These were quickly installed, and the resulting 80A model finally mounted the original complement of six guns. Armored glass in the windscreen, seat-back armor, and a new gun sight were also added at the same time, along with the newer 1,025 hp (764 kW) IAR K14 IVc32 1000A engine. The extra engine power proved to be more than the fuselage structure was designed to handle, and it had to be reinforced with a duralumin "belt" just behind the cockpit in the first 95 A series aircraft built before the fuselage could be modified.

Although the IAR 80A had a more powerful engine, the added weight of the guns, ammunition and armor plating reduced the top speed slightly to 316 mph (509 km/h). Nevertheless the new model was clearly an advancement, and the A model replaced the earlier one on the assembly line starting with the 51st airframe. Eight of these had been completed in time for the invasion of the Soviet Union on 22 June 1941.

FN guns remained in short supply, so throughout late 1941 and early 1942, guns were stripped from PZLs and observation aircraft for use in the IAR 80s.

IAR 80B

[edit]

Combat over the Soviet Union proved that even six of the FN guns still lacked punch, and once again firepower was increased, with 13.2 mm FN machine guns taken from Romanian SM.79s were installed in the IAR 80 in a new lengthened wing. The result was the IAR 80B, which also introduced new radios, an area where the aircraft had previously been weak.

A total of 55 of the new design were completed, including 20 airframes which were originally intended to be IAR 81As. These last 20 were thus able to carry a 50 kg (110 lb) bomb or a 100 L (22 imp gal; 26 US gal) drop tank under each wing. The entire series were delivered between June and September 1942.

IAR 81A

[edit]

As the fighter model was converting from the A to B series with the addition of the 13.2 mm guns, likewise the 81 model was upgraded in the same fashion, creating the IAR 81A. The only distinguishing feature between the 80B and the 81A was the 81's centerline bomb rack, and both were built on the same assembly line. The first order for 81As was cancelled and the airframes were instead delivered to fighter units as 80Bs. Efforts to obtain the Ju 87 dragged on, so a second batch of IAR 81As was ordered in May 1943 to replace losses. Once again fate intervened, and the Germans released the Ju 87 for delivery before the batch could be completed. Like the first batch, these 10 airframes were delivered as fighters.

IAR 80C

[edit]

The supply of the 13.2 mm guns was clearly limited, and in a further attempt to increase the firepower of the design the Romanians signed a deal with Ikaria in Germany for a supply of 20 mm MG FF/M cannon. These were a licensed version of the Swiss Oerlikon FF, which had been in use in various German aircraft. The new gun also required a redesign of the wing. Initially 60 IAR 81Bs were intended to be dive bombers, but these were delivered without the centerline bomb rack as fighters and designated IAR 80C. After the first 10 were completed, self-sealing tanks were added along with improved seat-back armor. The first 10 were delivered in December 1942 and the entire order was completed by April 1943.

IAR 81

[edit]

The ARR had intended to replace its light strike and dive bomber aircraft for some time when the war opened in 1941. The first role was to be filled by the IAR 37 (and later 38 and 39 models) but the plan was to fill the second role with the Junkers Ju 87. Once again the Germans deferred and the ARR was left searching for a design. The modification of the existing IAR 80 as a dive bomber was seen as a reasonable option, easier than designing an entirely new aircraft; as well as having obvious production benefits.

The result was the IAR 81, a minor change to the IAR 80A models that were then in production, adding a hinged bomb cradle under the centerline to throw a 225 kg (496 lb) bomb clear of the propeller (many dive bombers used a similar system). Delivery consisted of a shallow dive from about 3,000 to 1,000 m (9,800 to 3,300 ft) with the speed around 470 km/h (290 mph). Pilots disliked the aircraft, as the drag from the bomb cradle significantly hampered performance.

Fifty were ordered in mid-1941 but after 40 had been delivered, 50 kg (110 lb) bomb racks were added under each wing. The wing racks could also mount 100L drop tanks, allowing the 81 to be used as long-range fighters.

IAR 81C

[edit]

The final stage in the IAR 80's wartime history was the 81C. This version changed the guns once again, this time to the Mauser MG 151/20 which was replacing the MG FF/M in German service and had just been released for Romanian use. The order for the 81C was placed in May 1942, predating the second order of the 81As.

The first order for 100 airframes was delivered, like all of the prior updates to the 81 series, with the centreline bomb rack removed to be used as fighters. An additional order for 35 was placed in February 1943, and then another 15 in January 1944. These aircraft were primarily to replace losses in earlier models, while production of the Bf 109G ramped up.

IAR 80M

[edit]

By 1944 the ARR fighter units included examples of 80A, B and C models, as well as 81, 81Cs. In order to up-gun the earlier fighters as well as simplify logistics and maintenance, an upgrade program was started in mid-1944 to bring all existing airframes to the 81C armament suite of two MG 151/20s and two FN 7.92s. The resulting A and B models of the 80 and 81s would become the 80M and 81M respectively, although at this point there were no dive bombers in use. It is unclear how many conversions were completed.

IAR 80DC

[edit]

IAR 80s remained in service until 1949, when they were replaced by La-9s and Il-10s. Those airframes with the lowest hours were modified by removing a fuel tank in front of the cockpit and adding a second seat, resulting in a trainer designated the IAR 80DC. These were used for only a short time before being replaced by Yak-11s and Yak-18s in late 1952.

Further development

[edit]
IAR 80 replica at the National Military Museum

IAR realized that the Mistral Major was at the limits of its development potential even by the middle of 1941, when the 1000A model reached the same ultimate output as the original Gnome-Rhône engines. An ongoing program to fit the IAR 80 with a more powerful engine had been in the works for most of the design's lifetime, but this proved to be a fruitless endeavor.

The most obvious choice for a new engine would have been the BMW 801 used in the Focke-Wulf Fw 190. This engine produced a full 600 hp (450 kW) more power, and although it was heavier, it was of roughly the same size as the IAR K14. IAR engineers estimated that a BMW powered IAR 80 would have a maximum speed of at least 600 km/h (370 mph). But the Germans were unable to supply the engine as every example coming off the line was needed for installation in a German airframe. Licensed production was likewise out of the question, the engine production was in the midst of being ramped and the demand was so great that not even one set of jigs could be spared.

In the spring of 1941, IAR 80 no. 13 was fitted with a Daimler-Benz DB 601Aa engine borrowed from a Bf 109E. A flight test was carried out on 21 April 1941, but due to the strong vibrations, the pilot barely managed to bring it to the ground. Development was abandoned after this test flight, and was never flown again. Other tests were carried out with a 1,475 PS (1,085 kW; 1,455 hp) Daimler-Benz DB 605A fitted to IAR 81C no. 326 in the summer of 1943. According to the test reports, the aircraft's performance was greatly improved, however due to difficulties in producing the engine and the Germans not having engines for sale, the project did not materialize.[10]

Operational history

[edit]
"Hero shot" of an IAR-80 pilot with his aircraft

When Operation Barbarossa started, the IAR 80 equipped Esc. 41, 59 and 60 of Grupul 8 Vânătoare (8th Fighter Group), part of the Gruparea Aerienă de Luptă (GAL), that were tasked to support the Romanian 3rd and 4th Armies deployed at the southern flank of the Eastern Front.[11] 8th Group was the only unit assigned a pure fighter role, while 5th and 7th Groups, equipped with German aircraft (Heinkel He 112s and Messerschmitt Bf 109s) were employed primarily as fighter-bombers and bomber escorts.[12]

On 22 June 1941, during the first day of the offensive, the IAR 80 patrols had their baptism of fire, achieving a single aerial victory (claimed by Sublocotenent aviator Ioan Mihăilescu of Esc 60 Vânătoare, a future ace) during four separate air combats. However, at least four IARs force landed with battle damage, while another two suffered engine trouble.[13] By the end of 1941, 20 IAR 80/81s had been lost in combat or accidents.[14] During 1942 the Romanian aviation industry reached its highest output so that the Royal Romanian Air Force could be re-equipped as follows: Esc. 47, 48 and 52 (Grupul 9 Vânătoare), Esc. 43, 44 and 50 (Grupul 3 Vânătoare) and Esc. 41, 42 and 60 (Grupul 8 Vânătoare) received the new IAR 80A. Esc. 53 also replaced its Hurricanes with the IAR 80A, while Grupul 6 Bopi (Bombardament în Picaj - Dive Bombing) re-equipped with the IAR 81.[15]

In June 1942, the operational IAR fighter forces on the eastern front, combined into the Flotilla 2 Vânătoare consisted of Grupul 8 Vânătoare, commanded by Cdr. Lt Col E. Pîrvulescu, and included Escadrila 41, Escadrila 42 and Escadrila 60 with 12 IAR 80As each. During the Battle of Stalingrad, on 12 September, the 8th Fighter Group's IAR 80Bs (along with the 7th Fighter Group's Bf 109s) claimed to have shot down seven Yaks but they lost two IARs.[16] Grupul 8 moved at the end of September, to Karpovka, joining Grupul 7, equipped with Bf 109s.[17] On 12 and 13 December, Grupul 6 used its IAR 81s to support the German counterattack by the Panzergruppe Hoth of the Heeresgruppe Don, from Kotelnikovo towards Stalingrad.[18]

In the summer of 1943 the ARR's IAR 80s were transferred to Romania for air defense duties, where they were used in combat against the United States Air Force. USAAF attacks were directed at the oil refineries installation around Ploiești, in particular. On 1 August 1943 the IAR 80 faced the Consolidated B-24 Liberator heavy bomber for the first time. There were 178 B-24s from 9th USAAF, part of Operation Tidal Wave. The IAR 80Bs of Escadrila 61 and 62 of Grupul 6 Vânătoare, as well as IAR 80Cs from the newly formed Escadrila 45 of Grupul 4 Vânătoare,[19] together with the Bf 109Gs from Esc. 53 and Bf 110s from the Romanian night fighter squadron, dived on the low-flying, four-engined bombers, belonging to five USAAF bomber groups (the 44th, 93rd, 98th, 376th and 389th). The Americans lost – in combat or on the way back – 51 bombers. Only 89 reached their bases, of which only 31 were serviceable for a mission the next day. The Romanian pilots claimed 25 certain and probable victories for just two losses,[15] one IAR 80B and one Bf 110C. According to Romanian statistics, IARs and Messerschmitts were confirmed as having shot down ten B-24s, with two probables.[20]

On 21 April 1944, IAR 81Cs of the 1st, 2nd, and 6th Fighter Groups took off to intercept B-17 and B-24 bombers which were targeting the Bucharest marshalling yard. While attacking the bombers, the Romanian fighters were engaged at high altitude by the escorting P-51 Mustangs of the 31st Fighter Group. In the aftermath of the air battle, the ARR lost 14 IAR 80s and 11 pilots were killed, while the Americans reported 10 aircraft lost.[21]

Abandoned IAR 81C no. 411 being inspected by Soviets[22]

On 10 June 1944, IAR 80s took part in a major air battle when the USAAF attacked Ploiești with 38 P-38 Lightnings of the 82nd Fighter Group carrying one bomb each, escorted by 39 Lightnings of the 1st and 82 FGs.[23] The IAR 81Cs from Grupul 6, as well as the German fighters from I./JG 53 and 2./JG 77, intercepted the large American formation. Romanian pilot Dan Vizanty, commander of Grupul 6, recalled later:

"Our Lightning attack came as a complete surprise to the Americans. Our attack was so quick that not one of the 100 (sic) American aircraft managed to fire a single shot at our aircraft parked on the ground. Everything happened between ground level and about 2,000 meters (6,600 feet), and was total confusion. I was excited and proud of my "mills", the IAR 80s, which, thanks to their extraordinary agility, remained victorious in the air. I saw their crazy dives, quick rolls, reverse turns and inverted flying, always with just brief burst of fire to save ammunition. It was an incredible sight, but also a drama for the Lightning pilots, who, at this low altitude, were inferior to the ever-present, nimble IAR 80s".

The USAAF lost 22 P-38s on that day,[24] of which 9 were shot down by the IARs.[25] The Romanians claimed 24 victories, suffering three losses.[26] The Americans claimed 11 victories.[23]

IAR 80 during the winter on the eastern front

The American account of this battle conflicts significantly with the Romanian one. Fighter pilot Herbert "Stub" Hatch, who took part in the dogfight, wrote that his flight of 16 P-38s, the 71st Fighter Squadron, was challenged by a large formation of Romanian IAR 81C fighters that he misidentified as Focke-Wulf Fw 190s.[24] According to Hatch, the fight took place at and below 300 feet (100 m) in a narrow valley.[24] Hatch saw two IAR 81Cs hit the ground after taking fire from his guns, and his fellow pilots confirmed three more kills from his guns. Three of his victories were confirmed by gun camera, while the other two by his wingman, making Hatch an ace in a day.[27] However, the outnumbered 71st Fighter Squadron lost nine aircraft. The Americans never again repeated the P-38 dive-bombing mission profile over Romania.[28] But during 1944 USAAF aircraft appeared over Romania in more significant numbers. Many air combats occurred and by the time of their last encounter with the USAAF on 3 July 1944, pilots of Grupul 6 vânătoare had submitted 87 confirmed and ten unconfirmed claims.[29] Casualties among the Romanian fighter pilots quickly mounted too. The three IAR 80/81 groups (the 1st, 2nd and 6th) in a period of less than four months – known as the "American Campaign" – had at least 32 IAR pilots killed in action, including 11 aces. These losses exceeded the number of casualties suffered in the previous two and a half years of fighting against the Soviets.[30] Because of heavy losses, all IAR 80/81 units were withdrawn from combat against Americans in July 1944 and IAR pilots started to convert to the more modern Bf 109G-6s.[29]

Surviving aircraft

[edit]

After the Soviet occupation of Romania, all remaining IAR 80s were replaced with Soviet designs and scrapped. No complete original examples are known to survive. A static replica of the IAR 80 rebuilt post war after the fall of Communism and painted in its 1941–1944 original colors was shown at the Mihail Kogălniceanu airshow, near Constanța. The IAR 80 replica can be seen at the Romanian National Military Museum in Bucharest.[31][32] Another IAR 80 static replica can be found at the National Aviation Museum at the defunct Pipera Airport in Bucharest, which was rebuilt from IAR 80DC two-seat trainer parts. As of 2017 few attempts have been initiated to produce an airworthy accurate replica of the IAR 80 based on existing factory documentation and recovered components. A flying IAR 80 is still to be seen.[33] Since 2020, the Fly Again volunteer association is currently developing an airworthy replica of the IAR 80 which will be named IAR 80FA (Fly Again) and will carry the board number 451, where the original production left off.[34]

In fiction

[edit]

The IAR 80 appears in the historical fiction book Eighty Flights of a Not-So-Much-Of-A-Fighter-Pilot by Cătălin Pogaci.[35]

Operators

[edit]
IAR 80 replica at the National Aviation Museum in the markings of the 53rd Fighter Squadron
Romania
  • Royal Romanian Air Force[36]
    • 1st Fighter Group received IAR 80C aircraft in October 1943.
      • 43rd Fighter Squadron
      • 63rd Fighter Squadron
      • 64th Fighter Squadron
    • 2nd Fighter Group
      • 65th Fighter Squadron
      • 66th Fighter Squadron
      • 67th Fighter Squadron
      • 50th Fighter Squadron
    • 3rd Fighter Group received IAR 80A aircraft in August 1942.
      • 41st Fighter Squadron
      • 44th Fighter Squadron
      • 49th Fighter Squadron based at Târgșor.
    • 4th Fighter Group received IAR 80A aircraft in July 1942. In early 1943 was reequipped with IAR 80Cs.
      • 45th Fighter Squadron based at Cetatea Albă.
      • 46th Fighter Squadron based at Cetatea Albă.
    • 5th Fighter Group operated IAR 81C aircraft.
      • 51st Dive Bomber Squadron
      • 52nd Fighter Squadron
      • 53rd Fighter Squadron operated IAR 80A aircraft in late 1942.
    • 6th Fighter Group started training on IAR 80 aircraft since 27 September 1941 and in January 1942 conversion to IAR 81 begun.
      • 59th Fighter Squadron
      • 60th Fighter Squadron
      • 61st Dive Bomber Squadron
      • 62nd Dive Bomber Squadron
    • 7th Fighter Group received IAR 81C aircraft in October 1943.
      • 56th Fighter Squadron
      • 57th Fighter Squadron
      • 58th Fighter Squadron
    • 8th Fighter Group received first IAR 80 aircraft in February 1941. In April 1943 was transformed into 8th Assault Group and reequipped with Henschel Hs 129Bs.
      • 41st Fighter Squadron
      • 42/52nd Fighter Squadron received first IAR 80s aircraft in July 1941.
      • 59th Fighter Squadron received first six IAR 80s aircraft in September 1941.
    • 9th Fighter Group was formed in April 1942 and received IAR 80A aircraft. In April 1943 unit was reequipped with Bf 109Gs.
  • Romanian Air Force – Postwar.

Specifications (IAR 81C)

[edit]
IAR-80 3-view drawings

Data from [37][38]

General characteristics

  • Crew: 1
  • Length: 8.97 m (29 ft 5 in)
  • Wingspan: 11 m (36 ft 1 in)
  • Height: 3.600 m (11 ft 10 in)
  • Wing area: 17 m2 (180 sq ft)
  • Empty weight: 2,200 kg (4,850 lb)
  • Max takeoff weight: 3,030 kg (6,680 lb)
  • Fuel capacity: 330 kg (730 lb)
  • Powerplant: 1 × IAR K14 IVc32 1000A1 14-cylinder two-row air-cooled radial piston engine, 750 kW (1,000 hp)
  • Propellers: 3-bladed constant-speed propeller

Performance

  • Maximum speed: 510 km/h (320 mph, 280 kn) 524 Km/h at 5,350 m in tests of IAR 80 Nr.2 on 16.12.1940
  • Range: 730 km (450 mi, 390 nmi) on internal fuel only
  • Ferry range: 1,330 km (830 mi, 720 nmi) with extra fuel tanks
  • Service ceiling: 10,000 m (33,000 ft)
  • Time to altitude: 4'41" – 7'00" to 5,000 meters (depending on variant)
  • Wing loading: 132.35 kg/m2 (27.11 lb/sq ft)

Armament

See also

[edit]

References

[edit]

Further reading

[edit]
[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia
from Grokipedia
The IAR 80 was a single-engine, low-wing monoplane fighter aircraft developed by the Romanian state-owned company Industria Aeronautică Română (IAR) in the late 1930s as a response to a national requirement for a modern interceptor to replace imported Polish PZL P.24 fighters, with its first prototype flying on April 12, 1939, and entering service with the Royal Romanian Air Force (FARR) in early 1941. Powered by a licensed French Gnome-Rhône 14K (locally produced as the IAR K14-IV C32 or later K14-1000A delivering up to 1,025 horsepower), the IAR 80 featured an all-metal construction, a distinctive aft-sliding for improved pilot visibility, and a maximum speed of approximately 510 km/h (317 mph) at altitude, with a service ceiling around 10,000 meters (32,800 feet) and a range of about 700-1,000 km depending on the . Early models like the IAR 80A were armed with six 7.92 mm machine guns in the wings, while later upgrades such as the IAR 80C incorporated more powerful 20 mm cannons, and the related IAR 81 series added dive-bombing capabilities with underwing racks for 50-250 kg bombs, addressing Romania's evolving needs after joining the in 1941. In operational service during , the IAR 80 equipped several FARR fighter groups and saw extensive combat on the Eastern Front against Soviet forces starting in 1941, including notable engagements during the defense of Romanian oil fields at against U.S. Army Air Forces bombers in operations like Tidal Wave in August 1943, where Romanian pilots claimed several victories despite the aircraft's relative obsolescence compared to advanced Axis and Allied fighters by 1944. Following Romania's switch to the Allies in August 1944, surviving IAR 80s and 81s were used against German units until the war's end, with some remaining in limited training roles until 1952; approximately 346 aircraft were produced across all variants between 1941 and 1944, making it the most numerous indigenous Romanian combat aircraft of the era.

Development

Background and Requirements

In the late 1930s, the faced increasing pressure to modernize its fleet amid rising international tensions in and the growing obsolescence of its outdated fighters, such as the Polish-designed , which struggled to compete with emerging designs from major powers. To address these shortcomings and reduce dependence on foreign imports, Romania's government invested in domestic aviation capabilities, establishing state-owned factories like (IAR) in in 1925, which was nationalized in 1935 to prioritize military aircraft production. In 1937, the Romanian government issued a formal requirement for a new indigenous to replace outdated Polish models, specifying a single-seat, low-wing with retractable , all-metal construction, a top speed exceeding 500 km/h, a range of at least 1,000 km, and armament including multiple machine guns supplemented by a for enhanced firepower against contemporary threats. IAR was selected to lead the design effort due to its experience with of advanced like the , with the project headed by chief engineer Ion Grosu, who began initial sketches in 1938 incorporating influences from Polish and Italian designs for optimal and maneuverability. Development faced significant challenges, including Romania's limited industrial resources and reliance on licensed foreign engines, such as the IAR 14K—a Romanian-built version of the French Gnome-Rhône 14K radial producing around 870 hp—which imposed constraints on performance and required adaptations to meet the ambitious specifications. These hurdles were compounded by geopolitical uncertainties, delaying full realization of the design until prototyping could commence.

Prototyping and Testing

The construction of the first IAR 80 prototype began in late 1937 and continued through 1938–1939 at the factory in , , under the direction of a design team led by Professor Ion Grosu and engineer Ion Cosereanu. The airframe was initially designed for a inline engine but was adapted to use the licensed Gnome-Rhône 14K (built as the IAR K14) due to delivery delays from , requiring significant structural adjustments to accommodate the radial configuration. The occurred on April 12, 1939, piloted by Captain Aviator Dumitru Popescu during an official inaugural test from the airfield. Initial performance evaluations revealed a top speed of 510 km/h at 4,000 meters, which exceeded expectations for contemporary designs, but highlighted challenges including marginal and inadequate engine cooling under prolonged high-power operation. To address the cooling issues, engineers incorporated adjustable flaps on the engine for better airflow management during subsequent ground runs and flights. Testing progressed through 1939–1940 with a focus on refining the for operational roles, including integration of armament—initially two wing-mounted 7.92 mm FN-Browning machine guns—and exploratory dive tests to assess structural integrity under high-G maneuvers, as the design showed potential for ground-attack adaptations. Key modifications during this phase included transitioning from an open cockpit to an enclosed canopy for improved pilot visibility and protection, along with refinements to the retractable struts for enhanced ground handling and reduced drag. These iterative changes were applied across the initial test , with the first (No. 1) serving as the baseline, followed by Nos. 2 and 3 incorporating progressive refinements such as strengthened components to handle the engine's torque. In early 1940, the Romanian Royal Aeronautical Corps conducted formal military evaluations, pitting the IAR 80 against existing fighters like the and imported , where it demonstrated clear superiority in speed, climb rate, and maneuverability, prompting the cancellation of further He 112 imports. This led to an initial production order for 100 units on December 18, 1939, though deliveries were postponed until spring 1941 due to acute shortages of licensed engines and Belgian-sourced machine guns, exacerbated by the German invasion of the in and the broader disruptions of . In total, three prototypes were completed and used for these pre-production trials, enabling the transition to series manufacturing with accumulated design improvements.

Design

Airframe and Configuration

The IAR 80 was configured as a single-engine, low-wing fighter with conventional tailwheel , designed for agility in close-range combat. The employed an all-metal structure, with the featuring an oval cross-section: the forward section consisted of a welded steel-tube framework, while the rear was built as a stressed-skin for strength and lightness. The wings adopted a trapezoidal planform with a NACA 230412 profile, incorporating two spars and sheet-metal covering over the main surfaces, which contributed to a clean aerodynamic profile with 4°10' dihedral and 2° incidence. Key dimensions for early production series (1-20) included a of 10.52 m, overall of 8.97 m, and of 3.52 m, with a wing area of 16 m². The retractable Messier undercarriage featured oleo-pneumatic shock absorbers on the main wheels, which retracted inward into the wings, while a fixed tail skid provided rear support; the main gear had a track of 3.45 m and hydraulic brakes. Control surfaces—ailerons, elevators, rudder, and Handley-Page slotted flaps—were fabric-covered for flexibility, with the flaps capable of extending to 45° and the ailerons deflecting 26° upward and 24° downward to enhance low-speed handling. The aircraft's construction utilized duralumin for the primary frame and stressed skin, resulting in an empty weight of approximately 2,200 kg and a maximum takeoff weight of 2,980 kg, balancing robustness with relative lightness for a radial-engined fighter. Production models incorporated a closed, aft-sliding canopy positioned well aft of the cockpit for improved pilot visibility during maneuvers and ground operations, an adjustment from the open cockpit of the prototype. Overall handling was praised for excellent maneuverability and controllability at low speeds, making it suitable for dogfighting, though high-altitude effectiveness was constrained by power limitations that carried over from early prototyping challenges.

Engine and Performance

The IAR 80 was powered by the IAR K14-III C36, a 14-cylinder air-cooled radial engine rated at 930 hp (693 kW) for takeoff, which was a licensed derivative of the French Gnome-Rhône 14K Mistral Major produced locally by Industria Aeronautică Română (IAR). This engine provided reliable propulsion for the baseline fighter design, enabling solid low- to medium-altitude performance suited to Romania's operational needs during the early 1940s. Later upgrades in production incorporated the IAR K14-1000A variant, boosting output to 1,025 hp through improved supercharging and fuel injection, which enhanced overall thrust without significantly altering the airframe. In terms of flight characteristics, the standard IAR 80 achieved a maximum speed of 495 km/h (308 mph) at 5,000 m altitude, with a service ceiling of 10,000 m and an initial climb rate of approximately 15 m/s, allowing it to reach operational heights efficiently. The 's internal capacity totaled around 555 liters across two fuselage tanks (263 liters and 292 liters), yielding a combat range of 640 km, which could be extended to 1,000 km via underwing drop tanks for or escort missions. These metrics were supported by the low-wing configuration and retractable , which minimized drag and improved stability during ascent. Despite its strengths, the presented operational limitations, including vulnerability to battle damage from its forward-exposed cylinders, which lacked the protection afforded by inline designs, and occasional overheating risks during aggressive maneuvers due to airflow disruptions over the cooling fins. Comparatively, the IAR 80 matched or slightly exceeded the climb performance of early Bf 109E variants (around 15 m/s initial rate) thanks to its lightweight construction and , but it trailed in top speed by 20–30 km/h, limiting its edge in straight-line pursuits.

Armament and Avionics

The primary armament of the initial production IAR 80 fighters (series 1-50) consisted of four wing-mounted 7.92 mm FN-Browning machine guns, each supplied with 600 rounds of for a total of 2,400 rounds. These guns were positioned in the wings to fire outside the propeller arc, ensuring was unnecessary and facilitating straightforward integration into the all-metal wing structure. storage was accommodated in wing bays, allowing for relatively easy access and reloading during maintenance, with the total armament weight not exceeding approximately 500 kg including provisions for additional stores. The IAR 80A variant increased armament to six 7.92 mm machine guns. As the design evolved, the armament was further upgraded to enhance firepower against armored targets and bombers. Starting with the IAR 80B series, two of the 7.92 mm guns were replaced by 13.2 mm FN-Browning heavy machine guns, while retaining the other four 7.92 mm weapons. Later models, such as the IAR 80C, substituted the 13.2 mm guns with two 20 mm Ikaria cannon—locally produced under from Oerlikon—each carrying 60 to 120 rounds, positioned in the inner wing sections alongside the four 7.92 mm machine guns. These provided significantly greater destructive power, though their limited capacity emphasized short, decisive engagements. For ground-attack roles, the IAR 80 incorporated underwing hardpoints compatible with Romanian-manufactured ordnance, initially supporting two 50 kg from the IAR 80A onward. Subsequent upgrades allowed for increased payloads, up to 400 kg of distributed across wing racks, enabling versatility in without major modifications. The bomb release mechanisms were designed for compatibility with standard Romanian munitions, simplifying and integration. Avionics on the IAR 80 remained rudimentary, reflecting its pre-war development origins and resource constraints. Early production featured basic radio equipment for voice and communications, with improvements in later series providing more reliable short-range sets. The lacked or advanced aids, limiting its night-fighting capabilities to visual references only. Sighting systems started with simple on the first 20 prototypes and initial series, transitioning to Goerz GM2 reflector sights—locally manufactured—from the 21st production onward to improve aiming accuracy during high-speed intercepts. These optics were integrated into the dashboard for unobstructed forward visibility, supporting the fighter's emphasis on dogfighting and .

Production Variants

Fighter Models (IAR 80 to 80B)

The initial production variant, the IAR 80, consisted of 50 aircraft assembled at the IAR factory in during 1941. Armed solely with four 7.92 mm FN and lacking cannons, it utilized an early IAR K.14-III C36 rated at 930 hp, attaining a top speed of 510 km/h at 4,000 m. The IAR 80A represented a modest upgrade, with 70 examples produced between late and . This version augmented the armament to six 7.92 mm FN Browning machine guns while incorporating enhanced radio communications for better coordination in . Production advanced to the IAR 80B in , yielding 60 aircraft and marking the culmination of early fighter development with a cumulative total of 180 units across the three models. The 80B substituted two 7.92 mm guns for a pair of 13.2 mm FN Browning heavy machine guns, providing greater firepower against armored targets, and featured reinforced wings capable of carrying light bombs up to 50 kg each. Subsequent batches introduced improved cockpit and self-sealing fuel tanks to enhance pilot survivability and mitigate fire risks. Overall output at maintained a steady rate of 10–15 aircraft per month during this period. The related IAR 80C variant, produced in 50 units from 1943, upgraded to two 20 mm MG FF cannons alongside four 7.92 mm guns for increased firepower.

Dive Bomber Models (IAR 81 to 81C)

The dive bomber models of the IAR 80 family, designated IAR 81 to 81C, were adapted from the base fighter design to fulfill Romania's requirement for a ground-attack capable of during . These variants introduced bomb-carrying provisions and structural enhancements to withstand the rigors of steep-angle dives, with production focused at the (IAR) factory from 1942 onward. Approximately 200 units across the series were built as dive bombers or fighter-bombers, emphasizing roles over pure interception. The IAR 81 emerged as the initial adaptation in 1942, with 40 examples (including early BoPi batch) constructed to test and implement bombing adaptations on the IAR 80 airframe. It featured fixed dive brakes on the wings for stability during descent, along with enlarged spats enclosing the main wheels in a manner reminiscent of the German Ju 87 Stuka, to reduce drag and improve dive accuracy. These changes, combined with a ventral bomb rack for a 225 kg ordnance and underwing hardpoints for two 50 kg bombs, marked a shift toward dedicated ground-attack configuration, though the production retained the fighter's six 7.92 mm FN for self-defense. The IAR 81B, a minor update with 10 units, added further reinforcements. Subsequent testing led to the IAR 81A as a single dedicated , built to evaluate expanded and armament options for the role. This carried two 250 kg s under the wings and incorporated autocannons in the wings for enhanced capability, alongside modifications to the undercarriage for heavier loads. While only one primary was completed, the configuration informed later production, with the reinforced structure allowing for improved release mechanisms during dives. The IAR 81C became the principal production dive bomber, with around 150 units assembled between 1943 and 1944, representing the series' most refined ground-attack iteration. It featured a mixed armament of two 20 mm MG 151/20 cannons in the wings supplemented by two 7.92 mm machine guns, enabling effective suppression of ground targets, while the bomb load reached up to 350 kg through combinations of a 225 kg centerline bomb and additional underwing ordnance of two 50 kg bombs. Key structural adaptations included a reinforced fuselage to endure dive stresses, enlarged oil coolers for sustained low-altitude operations, and a strengthened undercarriage for operations from forward airstrips; however, these additions imposed a performance penalty, limiting loaded maximum speed to approximately 470 km/h compared to the fighter variants' cleaner profiles. Many IAR 81C airframes were ultimately delivered without installed bomb racks due to evolving operational needs but retained inherent dive bombing provisions, such as automatic flaps for recovery at angles up to 70 degrees.

Late Models (IAR 80M and 80DC)

The IAR 80M represented a late-war effort to enhance the fighter's performance through engine upgrades, with 1-2 units constructed as dedicated testbeds between 1943 and 1944. These aircraft were equipped with an experimental inline engine such as the Jumo 211D, which boosted power significantly compared to the standard radial, though wartime disruptions ultimately prevented full-scale production or deployment. In parallel, the IAR 80DC emerged as a specialized two-seat variant, with 10 existing airframes converted post-war around 1947-1949 to support advanced pilot instruction amid escalating operational demands. These conversions featured dual controls, reduced armament limited to essential machine guns for purposes, and an enlarged canopy for improved instructor visibility. The design prioritized instructional utility over combat capability, facilitating transition for Romanian pilots on more complex fighter tactics. Together, the late models totaled roughly 12 units, reflecting constrained resources during the final phases of Axis-Romanian collaboration. Further experimental work, such as the proposed IAR JUS 80 project for additional refinements, was abandoned in as hostilities concluded. , surviving examples saw limited service until , after which Soviet influence curtailed major upgrades and shifted Romanian aviation toward imported designs.

Operational History

Axis Service (1941–1943)

The IAR 80 entered operational service with the Royal Romanian Air Force (ARR) in early 1941, with the first production aircraft delivered between January and February of that year. By June 1941, it equipped the newly formed Grupul 7 Vânătoare (7th Fighter Group), comprising squadrons 47, 48, and 49, and participated in its combat debut on June 22, 1941, coinciding with the launch of Operation Barbarossa. Romanian pilots, trained alongside German instructors, flew initial missions escorting bombers over Bessarabia and southern Ukraine, where the IAR 80 demonstrated effective maneuverability in early engagements against Soviet aircraft. During the Odessa campaign in 1941, IAR 80s from the 8th Fighter Group (Escadrille 41, 59, and 60) provided and escort for S-79 bombers besieging the Soviet-held , contributing to overall Romanian claims of 332 Soviet destroyed in the air and 150 on the ground, though these figures represent combined ARR efforts and include significant overclaims relative to Soviet records. In the Stalingrad theater from September 1942 to January 1943, IAR 80s and IAR 81 variants from Grupul 8 Vânătoare escorted Ju 87 Stuka dive bombers and conducted ground-attack sorties supporting the Romanian 3rd and 4th Armies, claiming 39 Soviet shot down and 22 destroyed on the ground during approximately 5,000 sorties by the Combat Air Corps. Losses mounted against superior Soviet types such as the Yak-1 and LaGG-3, with 26 IAR 80/81s destroyed by enemy fighters and antiaircraft fire, alongside 65 more lost to retreats, accidents, or abandonment during the Soviet counteroffensive. By , production had ramped up to over 400 IAR 80 and 81 built, enabling more than 200 to be operational for home defense and Eastern Front duties, though many were recalled from to protect Romanian oil fields. Notable aces emerged, including Ion Dobran of the 9th Fighter Group, who achieved 10 confirmed victories, several in IAR 80s during 1942–1943 escort and interception missions. Pilots adapted to compensate for the aircraft's limited range and speed disadvantage against later Soviet fighters, prioritizing quick engagements over prolonged dogfights. Overall, IAR 80s claimed dozens of victories in these campaigns while sustaining around 50 losses by mid-1943, underscoring their role in Axis operations despite growing obsolescence.

Allied Service (1944–1945)

Following King Michael's coup on 23 August 1944, Romania switched allegiance to the Allies, prompting the reassignment of IAR 80-equipped fighter groups to defend , including the oil fields, from retaliatory attacks. Romanian pilots, now operating alongside Soviet forces, engaged German Bf 109 fighters and Ju 88 bombers in defensive intercepts, marking a dramatic shift from their prior Axis-aligned roles. These missions focused on protecting industrial assets vital to the Allied war effort, with IAR 80s providing close air cover amid the chaos of the German counteroffensive in the region. A major engagement occurred during the German bombing of on 24 August 1944, where formations targeted the capital in retaliation for the coup; IAR 80 units from the Royal scrambled to intercept, contributing to the defense alongside anti-aircraft batteries and claiming multiple German downed in fierce dogfights over the city. Further operations saw IAR 80s supporting Soviet advances into and , conducting ground-attack sorties and air superiority patrols against retreating columns and remnants through late 1944 and into early 1945. These actions highlighted the aircraft's versatility in the late-war theater, though its aging design limited effectiveness against more advanced opponents. Attrition mounted rapidly due to ongoing encounters with superior U.S. Army Air Forces heavy bombers like the B-24 Liberator, which continued raids on Romanian targets until the front stabilized; by early 1945, only around 50 IAR 80s remained airworthy amid fuel shortages and battle damage. The type was phased out of combat by , with total wartime losses estimated at approximately 220 aircraft in combat, and overall losses around 238 including accidents, ground losses, and captures, leaving about 90 in storage for potential postwar use. Post-armistice, a limited number underwent Soviet evaluation flights in 1945, but none saw further combat as transitioned to Soviet-supplied equipment.

Legacy

Operators

The IAR 80 family of fighters and dive bombers was operated exclusively by the Royal Romanian Air Force (Forțele Aeriene Regale Române, or FARR) from 1941 until the end of World War II in 1945. Approximately 346 aircraft across all variants were produced and assigned to Romanian units, forming the backbone of the nation's fighter force during the conflict. No exports occurred due to wartime conditions. The aircraft equipped multiple fighter groups within the FARR structure, with the 1st through 9th Fighter Groups all operating IAR 80 or IAR 81 variants at various points. For instance, the 8th Fighter Group utilized IAR 80A models in its 41st, 59th, and 60th Fighter Squadrons, while the 6th Fighter Group flew IAR 81 and IAR 81C in the 59th, 61st, and 62nd Squadrons. The 4th Fighter Group transitioned to IAR 80C in 1943 and IAR 81C in 1944, and the 7th Fighter Group operated IAR 81C from 1943 to 1944. Other units included the 1st, 2nd, 3rd, 5th, and 9th Fighter Groups, which received IAR 80, IAR 81, or IAR 81C allocations for combat and training roles. The Escadrila 62 (62nd Fighter Squadron) served as a dedicated dive bomber unit, primarily equipped with the IAR 81C variant from 1943 to 1944 as part of the 6th Fighter Group. At its peak, the IAR 80 family was distributed across roughly 15 squadrons, supporting operations on both the Eastern Front and in home defense. Following the war, surviving IAR 80s entered service with the Romanian People's Air Force, continuing in limited roles until approximately 1949–1950, when they were replaced by Soviet-supplied fighters and subsequently scrapped under Soviet directives.

Surviving Aircraft

As of 2025, no complete original airframes of the IAR 80 or IAR 81 from service survive intact, with all known examples having been scrapped during the 1950s following their post-war use as trainers. However, two static replicas exist in Romanian museums, and partial remains have been used in restoration efforts, resulting in no flying examples today—the last operational flights occurred around 1950–1952. Undocumented wrecks from wartime operations, particularly around the in , may still exist but have not been systematically recovered or verified. The most prominent display is an IAR 80 replica marked as "112" at the Muzeul Național al Aviației Române in , constructed using the fuselage from a post-war IAR 80DC two-seat trainer recovered in the 1970s; it remains unrestored and serves as a static exhibit highlighting the aircraft's design. A second replica, representing an early IAR 80 marked as "No. 1," is on display at the King Ferdinand National Military Museum in , built in the 1990s with fabricated components to replicate the fighter's configuration and is similarly unrestored. In addition, the Sky Legend Association has been leading a project since 2019 to construct a full-scale flying of the IAR 80 at facilities near , incorporating some recovered original parts from crash sites; initiated in 2019 and ongoing as of the last public updates in 2023, the effort includes plans for airworthy completion, though no timeline has been confirmed and no recent developments are publicly documented as of 2025.

References

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