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Krupp Protze
Krupp Protze
Krupp Protze
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Key Information

Krupp M305 motor schematic diagram

The Krupp Protze (lit. limber, officially L 2 H 43 and L 2 H 143) was a six-wheeled 6×4 German truck[1] and artillery tractor produced between 1934 and 1941 and heavily used in World War II. It was powered by a 4-cylinder, 55 hp or, from 1936, 60 hp Krupp M 304 petrol engine. Its main purpose was to tow artillery, especially the 3.7 cm Pak 36 anti-tank gun (designated Kfz 69), and transport motorized infantry (designated Kfz 70).

This vehicle was extensively used on the Eastern Front, during the North African campaign and in France and Sicily. The "Krupp-Protze" was of relatively advanced design. Its fuel consumption was relatively high (24 Litres / 100 km on road) in comparison to the comparable Opel Blitz 1.5 t truck (16.5 liters / 100 km, produced 1938 - 1942).

Total production was about 7,000 units.

Variants

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A successful design, the Krupp-Protze was converted into several variants:

Kfz.19
Telephone truck
Kfz.21
Staff car
Kfz.68
Radio mast carrier
Kfz.69
Standard configuration for towing the 3.7 cm Pak 36 anti-tank gun. Carried 2 in front with 4 in a pair of forward and rear facing seats.
Kfz.70
Standard configuration for personnel carrying. carried 2 in front with 10 seated in the rear on benches.
Kfz.81
Ammo carrier conversion for 2 cm FlaK anti-aircraft gun, usually towed
Kfz.83
Generator carrier for anti-aircraft searchlight, usually towed
Sd.Kfz. 247 Ausf. A
Krupp built ten Ausf. A models on the chassis of its six-wheel Krupp Protze truck in 1937.

Sometimes anti-tank (37 mm Pak 36) and anti-air (2 cm Flak) guns were mounted directly on the truck bed (Portée).

See also

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Notes

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References

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Krupp Protze

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The Krupp Protze was a six-wheeled 6×4 utility truck and artillery tractor produced by the German industrial firm Friedrich Krupp AG between 1934 and 1941, serving as a key light vehicle in the Wehrmacht's motorized units during World War II. Development of the Protze began as a private initiative by Krupp in 1929, with the Reichswehr approving the design in 1934 for series production, which ultimately yielded approximately 7,000 units before it was phased out in favor of more efficient vehicles like the Opel Blitz due to its high fuel consumption. The vehicle's distinctive sloping hood accommodated its air-cooled boxer engine, providing good visibility and a compact profile, while its lightweight construction and high ground clearance made it suitable for rough terrain. The primary variants included the L 2 H 43, powered by a 55 horsepower M 302 3.3-liter four-cylinder , and the improved L 2 H 143 with a 60 horsepower M 304 engine introduced in 1936; both models featured a capacity of around 1,150 kg, a top road speed of 70 km/h, and a range of 450 km. adaptations encompassed the Kfz. 69 as a prime mover for light artillery such as the anti-tank gun, the Kfz. 70 personnel carrier, and specialized versions like the Kfz. 81 for anti-aircraft towing or the Kfz. 19 radio car, with a rare armored variant known as the Sd. Kfz. 247 produced in limited numbers. In service, the Protze first saw combat with the Legion Condor during the and was extensively deployed across multiple fronts in , including the invasions of and , operations in , , and the Eastern Front, where it supported , , and units until the end of the war.

Development

Origins and Design

The concept of the originated from the World War I-era "Kraftprotze," a powered limber designed by in 1918 as a light to supplement or replace horse-drawn transport amid shortages of draft animals. This early design, submitted to the on May 22, 1918, featured a compact intended for light guns and included variants with armament for self-defense, though only prototypes were produced before the war's end. In the , amid 's rearmament under the and rising militarism, revived and expanded this concept as a private venture starting in 1929, focusing on a light three-axle cross-country to meet emerging needs for mechanized mobility. By 1933, as the Nazi regime accelerated expansion, refined the design into a versatile 6x4 truck specifically to fulfill requirements for a multi-role capable of towing and transporting troops or supplies in varied terrains. The initial production model, designated L 2 H 43, entered service in 1934, powered by a 55 horsepower air-cooled four-cylinder boxer ( M 302, 3,308 cc) that emphasized simplicity and reliability for field use. In 1936, an upgraded variant, the L 2 H 143, replaced it with a more powerful 60 horsepower version of the same type ( M 304), along with modifications to the rear for improved stability and load distribution. The design prioritized off-road performance through its six-wheel 6x4 configuration, with rear-wheel drive enabling effective traction for towing light ordnance such as the , while the front axle provided steering. Key features included a high ground clearance of 225 mm to navigate rough and a rugged, box-section ladder frame construction that facilitated rapid assembly and maintenance in wartime conditions. The air-cooled boxer engine's low center of gravity further enhanced stability, making the Protze well-suited for roles in the mechanized forces of .

Production History

The Krupp Protze entered serial production in 1934 following initial orders from the for evaluation and trials, marking the vehicle's transition from prototype to standardized military use. Manufactured primarily by at its facilities in , , the design emphasized simple, cost-effective assembly techniques to support rapid mobilization efforts under the rearmament program. Production peaked in the late , with the L 2 H 43 model giving way to the improved L 2 H 143 variant in 1936, which featured a more powerful engine for enhanced reliability. By the end of the run in 1941—extended slightly into 1942 for limited units amid wartime demands—approximately 7,000 vehicles had been completed across all configurations. Pre-war exports included shipments to allies such as , where 150 chassis were acquired in 1938–1939 and assembled locally by the Uhry factory in , as well as purchases by the Latvian Army in the . The vehicle's decline began in 1941 under the Schell Plan, a initiative that phased out diverse types in favor of more efficient, all-wheel-drive 1.5-ton lorries like the to streamline logistics and manufacturing. Key factors included its high fuel consumption—around 24 liters per 100 km on roads—and growing obsolescence relative to newer designs with superior off-road performance and resource efficiency, exacerbated by wartime shortages that curtailed further output. Despite these limitations, the Protze's emphasis on towing roles ensured its continued utility in early mobilization phases.

Design and Specifications

Chassis and Engine

The Krupp Protze utilized a robust ladder-frame designed for off-road applications, featuring a narrow central frame that tapered into a V-shape to support the cab, engine, and forward . This construction provided high ground clearance of approximately 225 mm while maintaining structural integrity under load. The vehicle employed a 6x4 configuration, with the front handling via a rigid beam and the rear dual axles delivering drive power through four wheels, enabling effective traction in varied terrains. Suspension was achieved primarily through semi-elliptic leaf springs on the front directional , covered by mudguards for protection, while the rear featured an innovative independent setup with horizontal coil springs and a free-floating design augmented by spare wheels for enhanced stability on rough ground. This combination balanced load distribution and mobility, with the overall dimensions measuring 5.10 m in length, 1.93 m in width, and 1.96 m in height, resulting in a curb weight of around 2,600 kg. For the early L 2 H 43 variant, the was 2,470 mm + 860 mm; the later L 2 H 143 had 2,445 mm + 910 mm. Early models (L 2 H 43, 1934-1935) were powered by the M 302, a four-cylinder boxer with , which eliminated the need for a and improved reliability in dusty conditions. Displacing 3.3 liters (3,308 cc), it produced 55 hp. From 1936, the improved L 2 H 143 variant used the M 304 engine, upgraded to 60 hp at 2,500 rpm, with the flat boxer layout allowing placement beneath the cab for optimal weight distribution. The engine's air-cooled design contributed to its compact profile and low maintenance requirements in field operations. Transmission was handled by a ZF-Aphon 4-speed manual gearbox, incorporating a countershaft and optional reduction gears for low-speed tasks, along with two locking differentials to enhance off-road performance. This setup provided versatility, with the potential for up to eight speeds when using the , supporting the vehicle's primary role in transport.

Performance and Capabilities

The Krupp Protze achieved a maximum road speed of 70 km/h when lightly loaded, reducing to approximately 60 km/h when carrying its standard payload of 1,150 kg. Off-road performance was more limited due to its configuration, though specific speeds varied with terrain and load, contributing to its reputation for reliable traction in operations. Its operational range reached 450 km on roads with a 110-liter , but high fuel consumption of 24 liters per 100 km imposed significant logistical demands compared to contemporaries like the . Payload capacity stood at 1,150 kg for on-road use, suitable for transporting troops, , or equipment, while off-road operations required reductions to maintain stability and mobility, often around 800 kg depending on conditions. Towing capacity was rated at 1,000 kg, enabling effective pulling of artillery such as the or the 2 cm Flak 30 anti-aircraft gun, where its low-speed torque provided excellent traction. The vehicle featured a ground clearance of 225 mm and could ford water up to 0.6 m deep, allowing passage over minor obstacles and streams but limiting it in deeper or more rugged environments. Typically crewed by 2 to 4 personnel—including a driver and passengers or gunners depending on configuration—the Protze lacked any armor, relying entirely on speed and cross-country ability for crew protection. Its unarmored design and mechanical complexity made it vulnerable to breakdowns, particularly in adverse conditions like the muddy terrains of the Eastern Front, where high fuel needs and maintenance requirements exacerbated operational strains.

Variants

Standard Configurations

The standard configurations of the Krupp Protze encompassed the fundamental utility variants optimized for towing and personnel transport, all utilizing the L 2 H 43 or L 2 H 143 6x4 with minimal deviations from the base design. These models featured a standardized forward cab with a sloping bonnet, often equipped with a removable cover for weather protection, and an open rear platform to facilitate loading and unloading. Production of these core variants contributed to the overall output of approximately 7,000 units between 1934 and 1942. The Kfz.69 represented the primary configuration, engineered specifically for towing light field pieces such as the anti-tank gun. It provided seating for 2 crew members plus 4 gunners in the rear compartment, allowing efficient movement of detachments to firing positions. This variant achieved the highest production numbers among standard models, underscoring its central role in motorized units. The Kfz.70 functioned as the standard personnel carrier, adapted for transporting in and support roles. Its rear body included bench seating for 2 crew in the cab and up to 10 infantrymen, enabling rapid deployment of small squads. The design emphasized simplicity, with the open platform covered by canvas when needed for protection during transit. The Kfz.81 served as an ammunition carrier tailored for anti-aircraft units, supporting 2 cm Flak 30 or Flak 38 guns by hauling shells and equipment. It retained an open-top rear body for swift access to munitions, and could additionally tow loads when required. Like its counterparts, it relied on the shared for off-road reliability in supply operations.

Specialized Models

The Kfz. 19, designated as the Fernsprechbetriebskraftwagen, served as a specialized operations vehicle for field communications, featuring a closed mounted on the L 2 H 143 to house communication equipment. This variant supported the Wehrmacht's units by enabling rapid setup of lines in forward areas, with its design emphasizing mobility over the rough terrain typical of early battlefields. The Kfz. 21 functioned as a staff car for officers, known as the schwerer geländegängiger Personenkraftwagen, with a cabriolet body constructed by Hebmüller Karosseriewerke that included a map table for operational planning. Built on the L 2 H 143 chassis, it offered seating for up to six personnel, though total production numbers remain unknown, with photographic evidence indicating at least small batches for units like the Führer-Begleit-Bataillon. Early examples featured a high engine bonnet, while later ones incorporated a lower profile with ventilation slots, possibly paired with an upgraded 70 hp engine in the L 2 H 243 variant. The Kfz. 68, or Funkmastkraftwagen, acted as a radio mast carrier to support command post operations, equipped with a closed on the L 2 H 143 that allowed for the erection and vertical adjustment of a radio mast secured by guy lines. This telescoping antenna setup facilitated enhanced radio communications for motorized units, enabling reliable in dynamic frontline environments. Production details are limited, but it formed part of the broader Protze lineup adapted for signals support. The Kfz. 83, classified as the Leichter Scheinwerferkraftwagen, was a generator carrier designed to power anti-aircraft s, featuring two variants mounted on the light cross-country to transport and operate an 8-kilowatt diesel for the towed 60 cm Flak-Scheinwerfer 36. Primarily employed by the near frontline airfields, it provided mobile electrical support for batteries, ensuring effective night defense against aerial threats. Like other specialized models, its production was integrated into the overall 7,000-unit run of Protze vehicles from 1934 to 1941. The Sd. Kfz. 247 Ausf. A represented a rare armored variant built on an elongated Protze L 2 H 43 chassis, with exactly 10 units produced between 1937 and 1938 by and Daimler-Benz as a heavy cross-country armored personnel carrier. It featured 6-8 mm sloped armor plating capable of resisting 7.92 mm bullets at ranges beyond 30 meters and an open-topped design for senior officers, armed primarily with an MP 38/40 submachine gun carrying 192 rounds, though some examples added an machine gun for anti-aircraft defense. As a one-off series, it served in and roles, often showcased in parades before most were lost by 1943-1944.

Operational Use

Pre-World War II

The Krupp Protze entered service following initial trials conducted between 1934 and 1936, during which the L 2 H 43 model proved its reliability as a light and troop carrier in various military exercises. These evaluations highlighted its cross-country capabilities and versatility for towing light field guns, leading to its adoption for support roles by 1937. The vehicle's combat debut occurred in 1936 with the German Legion Condor during the , where it served primarily as a platform for anti-tank guns deployed against Republican forces. In this early conflict, the Protze facilitated rapid artillery repositioning across diverse terrains, contributing to Nationalist advances while providing transport for up to six soldiers in its Kfz. 70 configuration. Its performance in these operations offered the initial feedback on operational deployment before broader wartime use. Exports of the Krupp Protze began in the late 1930s, with acquiring 150 chassis in 1938 for local assembly by the Uhry to bolster its motorized units. Similarly, purchased examples in for integration into its army, as evidenced by their appearance in military parades during the . These international trials further validated the vehicle's design for foreign militaries preparing for potential conflicts.

World War II Service

The Krupp Protze served as a vital during the initial phases of , particularly in the 1939 and the 1940 campaign in . It primarily functioned as an , towing the to support and panzer divisions in the rapid maneuvers that characterized these operations. Its six-wheeled 6×4 configuration provided sufficient mobility for the forested and rural terrains encountered, enabling quick repositioning of light artillery pieces during advances. From 1941 onward, the Protze saw extensive deployment on the Eastern Front, including with Army Group Center during . In the harsh conditions of mud () and extreme cold, the vehicle experienced mechanical strain and high attrition rates, as its off-road performance proved inadequate for prolonged operations over vast, unpaved distances under heavy loads. Despite these challenges, it continued to haul supplies, personnel, and light field guns like the 7.5 cm le.IG 18 for support divisions until 1943. Concurrently, in , Protze trucks equipped the under , serving in logistics roles such as troop transport (Kfz. 70) and towing anti-aircraft guns for convoy protection across desert sands from 1941 to early 1943. By 1943, the Protze's role diminished in major theaters, with limited sightings in the Allied invasions of and the Italian mainland, where surviving units provided secondary transport amid mounting supply constraints. Production had ceased in , and frontline units increasingly phased it out in favor of the more fuel-efficient due to the vehicle's high consumption rates exacerbating shortages, compounded by its vulnerability to interdiction. Captured examples were repurposed by Soviet forces on the Eastern Front and by Western Allies in , while Hungarian units continued employing them into 1944 for towing during defensive operations.
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