Heinkel He 71

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Heinkel He 71
Heinkel He 71 B L'Aerophile May 1933.jpg
Type: School , sport and travel aircraft
Design country:

Nazi stateNazi state German Empire

Manufacturer:

Heinkel

First flight:

March 1933

Number of pieces:

1

The Heinkel He 71 was a German light single-engine multi - purpose aircraft .

history

The He 71 was designed under the direction of Robert Lusser with the aim of creating an advanced aerobatic training aircraft that should also be suitable for the training of future fighter pilots. Project planning work began in early 1933, and after a three-month construction phase, the He 71a took off on its maiden flight. The single-seat aircraft with the registration number D-2390 was equipped with a closed cabin and an HM-60 engine from Hirth with 44.13 kW (60 hp). Despite the advanced cantilever monoplane-Building method and successful testing, Heinkel decided against series production due to a lack of production capacities. Instead, the model was equipped with a more powerful HM-4 engine, also from Hirth. The available space was used to accommodate an additional fuel tank, which increased the maximum range from 1000 to 2500 km. The type that was converted in this way and now known as the He 71 B was then used by Elly Beinhorn for her second long-haul flight in Africa from April 4 to July 27, 1933, during which she covered a total of 28,000 km. The cockpit was then removed, the back of the fuselage was made flatter and the aircraft was flown with the cabin open. On August 13, 1934, the He 71 broke in an accident.

construction

The He 71 was a cantilever low - wing aircraft made of wood with a trapezoidal, single-spar wing and tail unit. The fuselage was planked with plywood and had a rectangular cross-section with a rounded top. The wings were covered with fabric. The chassis consisted of two main wheels with streamlined fairings in teardrop shape and a grinding spur at the rear. The suspended Hirth motor without reduction gear was equipped with a non-adjustable two-bladed wooden propeller with a diameter of 1.80 m.

Technical specifications

Three-sided view
Parameter Data (He 71 B)
crew 1-2
length 6.97 m
span 9.50 m
height 1.70 m
Wing area 12.90 m²
Wing loading 52.3 kg / m²
Power load 8.7 kg / hp
Empty mass 310 kg
Preparation mass 335 kg
Takeoff mass 679 kg
Engine an air-cooled four-cylinder in- line engine Hirth HM 4
power 57 kW (78 PS) takeoff power at 2400 rpm
52 kW (70 PS) rated power at 2200 rpm
Propeller a rigid two-bladed wooden propeller with a diameter of 1.80 m
Top speed 212 km / h near the ground
200 km / h at an altitude of 1000 m
180 km / h at an altitude of 2000 m
Cruising speed
at 80% take-off power		 177 km / h near the ground
160 km / h at an altitude of 1000 m
146 km / h at an altitude of 2000 m
Landing speed 68 km / h
Rise time 4.2 min at 1000 m altitude
10.6 min at 2000 m altitude
18.5 min at 3000 m altitude
Take-off run 310 m
Take-off / landing distance
up to / from a height of 15 m		 490 m / 370 m
Service ceiling 5200 m
Range normal 1400–1600 km at maximum or cruising speed at 2000 m altitude
maximum 2500 km

literature

  • Volker Koos: Ernst Heinkel Flugzeugwerke 1922–1932 . Heel, Königswinter 2006, ISBN 3-89880-502-6 , p. 138/139 .
  • Heinkel . Chronicle and data sheets from Heinkel-Flugzeugbau. 3. Edition. Aviatic, Oberhaching 1996, ISBN 3-925505-08-3 , pp. 73-76 .
  • Heinz J. Nowarra : The German Air Armament 1933-1945 . Volume 2: Erla – Heinkel aircraft types. Bernard & Graefe, Koblenz 1993, ISBN 3-7637-5466-0 , p. 183 .

Web links

Commons : Heinkel He 71  - Collection of pictures, videos and audio files