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Heinkel He 72 Kadett

Germany · Interwar (1919–1938)

Heinkel He 72 Kadett — Fixed Wing
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The Heinkel He 72 Kadett ("Cadet") was a German two-seat biplane primary trainer — the principal Luftwaffe basic-flying-training aircraft of the mid-1930s. Heinrich Hertel designed the He 72 in 1933; the prototype first flew in early 1934. About 1,100 He 72s were built between 1934 and 1939 at Heinkel Warnemünde + several German plants. The aircraft served Luftwaffe pilot-training programmes throughout the late 1930s before replacement by the Focke-Wulf Fw 44 Stieglitz + Bücker Bü 131 Jungmann.

The He 72 used a Siemens-Halske Sh 14a 7-cylinder radial engine (160 hp). Maximum speed 185 km/h, range 470 km, service ceiling 4,500 m. The aircraft was a conventional staggered-biplane trainer with tandem open cockpits + fixed undercarriage. It was designed for ab-initio flight training — providing student pilots with low-cost, forgiving handling characteristics during their first 30-60 hours of flying.

He 72 service was concentrated in Luftwaffe primary flight-training schools. The aircraft served alongside the Focke-Wulf Fw 44 Stieglitz and Bücker Bü 131 Jungmann throughout the 1930s. The He 72 was gradually withdrawn from front-line training duties by 1939 in favour of newer trainers; surviving airframes were transferred to Luftwaffe glider-towing units, courier duties, and (during WWII) to Romanian, Hungarian, and other Axis-aligned air forces. About 2 He 72 airframes survive in 2026 at German aviation museums.

For Kids — a shorter, friendlier version

The Heinkel He 72 Kadett was a German biplane trainer from the 1930s. The German word Kadett means 'Cadet' in English. The plane was the main basic trainer for new Luftwaffe pilots in the mid-1930s.

Heinrich Hertel designed the He 72 in 1933. The first one flew in early 1934. About 1,100 He 72s were built between 1934 and 1939. The plane had two seats — one for the student and one for the teacher.

The He 72 used a small 160-horsepower Siemens-Halske radial engine. Its top speed was only 115 mph, which was perfect for beginners. The plane is about as long as a small minivan.

The He 72 was replaced by the Focke-Wulf Fw 44 Stieglitz and Bücker Bü 131 Jungmann in the late 1930s. Many He 72s kept flying as private sport planes after the war. The plane was simple, easy to repair, and gentle to fly — perfect qualities for a basic trainer.

Fun Facts

  • The German word Kadett means 'Cadet' in English.
  • About 1,100 He 72s were built between 1934 and 1939.
  • The plane was the main basic trainer for new Luftwaffe pilots in the mid-1930s.
  • Its top speed was only 115 mph — perfect for beginner pilots.
  • The He 72 was replaced by the Focke-Wulf Fw 44 Stieglitz.
  • Many He 72s kept flying as private sport planes after the war.

Kids’ Questions

Why are training planes slow?

New pilots make lots of mistakes. A slow plane gives them more time to react and recover before something goes wrong. Slow planes also land at lower speeds, which is much safer for beginners. Once a student gets good, they move up to faster planes step by step.

Why are training planes biplanes?

Biplanes with two stacked wings are very stable and forgiving — they do not roll quickly or surprise the pilot. Slow biplanes also have low landing speeds, perfect for student landings. By the late 1930s, simpler and faster monoplane trainers like the Bücker Bü 131 took over.

Variants

He 72A (basic trainer)
Initial 1934 production with Sh 14a engine. About 800 built.
He 72B (improved)
Improved variant with refined cockpit + better visibility. About 300 built.

Notable Operators

Luftwaffe (1934-1944)
Principal user. ~900 He 72s in primary-trainer service. Withdrawn from main training role by 1939; surviving airframes used for glider towing + liaison through WWII.
Axis allies (1940s)
Romanian, Hungarian, Bulgarian, Slovak air forces operated transferred He 72s in trainer roles during WWII.

Frequently Asked Questions

What was the He 72 used for?

Primary (ab-initio) flight training. Luftwaffe flight schools used He 72s for student pilots' first 30-60 hours of training. The aircraft's forgiving handling, simple controls, and low operating cost made it ideal for early flight instruction. Most Luftwaffe pilots of the early WWII years began their flying careers in He 72s before progressing to higher-performance trainers.

Why was the He 72 replaced?

By 1939 the Focke-Wulf Fw 44 Stieglitz and Bücker Bü 131 Jungmann had become the Luftwaffe's standard primary trainers — both offered slightly better handling characteristics and were more numerous in production. The He 72 was gradually withdrawn from front-line training and surviving airframes were transferred to ancillary roles (glider towing, courier, liaison).

How many He 72s were built?

About 1,100 airframes 1934-1939 at Heinkel Warnemünde + other German plants. The Luftwaffe pilot-training expansion under German rearmament drove high He 72 production rates throughout the mid-1930s.

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