Akaflieg Darmstadt D 29
| Akaflieg Darmstadt D 29 b | |
|---|---|
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| Type: | Experimental airplane |
| Design country: | |
| Manufacturer: | |
| First flight: |
1936 |
| Number of pieces: |
1 |
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The Akaflieg Darmstadt D 29 is a German test aircraft from the 1930s. In contemporary publications it was also referred to as D 29 b .
development
The D 29 was designed and built by the Aviation Technical Group (FFG) under the direction of engineer Voigt on behalf of and with the support of the Reich Aviation Ministry at the Technical University of Darmstadt after the good experience with the predecessors D 18 and D 22 . Various buoyancy aids should be tried out with it. As drive one came Sh-14 - radial engine used. The only completed specimen flew for the first time in 1936 and was registered as D-EILE . Various flap systems such as Fowler flaps and various aerodynamic fairings were to be installed for tests , but the outbreak of war put an end to all relevant planning.
construction
The D 29 is a self-supporting low-wing aircraft in composite construction with a breaking load multiple of 8.0. The fuselage consists of a fabric-covered tubular steel frame. At the bow is the radial engine with a NACA hood with a propeller made of duralumin . The trapezoidal wings with an average depth of 1.27 m consist of an equally covered wooden frame and have a kink . They are equipped with slats and slotted flaps over the entire span . The D 29 has a wooden T-tail unit with a braced horizontal stabilizer . The main landing gear with 1.45 m wheel track is rigid, aerodynamically clad and attached in the area of the wing bend. It has hydropneumatic springs and is fitted with 550 × 130 mm medium-pressure tires.
Technical specifications
| Parameter | Data |
|---|---|
| crew | 1-2 |
| span | 8.80 m |
| length | 7.10 m |
| height | 2.76 m |
| Wing area | 10.00 m² |
| Wing extension | 7.74 |
| V shape | 6 ° |
| Wing loading | 85.00 kg / m² |
| Power load | 5.66 kg / hp |
| Area performance | 15.00 hp / m² |
| Preparation mass | 560 kg |
| Payload | 290 kg |
| Takeoff mass | 850 kg |
| drive | an air-cooled seven-cylinder - radial engine with adjustable two-bladed propeller (diameter 2.20 m) |
| Type | Bramo Sh 14 A |
| Starting power | 150 hp (110 kW) at 2200 rpm |
| Fuel supply | 120 l |
| Top speed | 250 km / h |
| Cruising speed | 225 km / h |
| Landing speed | 80 km / h |
| Rate of climb | 4.5 m / s near the ground |
| Summit height | 6500 m |
| Range | 750 km |
| Flight duration | 3.5 h |
literature
- Bruno Lange: Type manual of German aviation technology . In: German aviation . tape 9 . Bernard & Graefe, Koblenz 1986, ISBN 3-7637-5284-6 , pp. 93 .
- Günter Brinkmann, Kyrill von Gersdorff, Werner Schwipps: Sports and travel aircraft. Guidelines for a diverse development . In: German aviation . tape 23 . Bernard & Graefe, Bonn 1995, ISBN 3-7637-6110-1 , pp. 251 .
- Helmut Schneider: Airplane type book . Handbook of the German aviation and accessories industry. Reprint of the original edition from 1944. Gondrom, Bindlach 1986, ISBN 3-8112-0484-X , p. 104/105 .
