Akaflieg Berlin little devil
| Akaflieg Berlin little devil | |
|---|---|
 Start of the first coastal gliding in 1923 near Rossitten |
|
| Type: | Glider |
| Design country: | |
| Manufacturer: | |
| First flight: |
Spring 1923 |
| Number of pieces: |
1 |
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The little devil was a single-seat, self-supporting shoulder - wing glider of the Academic Aviation Group of the Technical University of Berlin-Charlottenburg . The construction of Kurt Tank was built using the company aircraft in the department Seeflugzeugbau in Stralsund built. The machine took part in the coastal gliding in Rossitten in 1923 and 1924 and flew in the 1923 Rhön competition on the Wasserkuppe .
construction
The structure could be assembled lengthways in different positions with a variable V-position . The wing ribs in construction with two box bars consisted of the leading edge to the front spar of a plywood planked torsion, to which fabric cover joined. On the completely covered outer wing, ribs were movably mounted around a tubular spar. Only the edge curve was firmly connected to this pipe, which could be twisted by the pilot. By twisting the outer wings, the aircraft could be steered around the longitudinal axis and, in combination with a rudder deflection, turning was possible.
The wing, which was still cantilevered on a design drawing, was braced with small fishing stems on the first flights, which were exchanged for braces in the middle of the wings and on the lower edge of the fuselage by the Rhön competition at the latest in 1923.
The plywood hull had a rectangular cross-section, a wide sprung runner on the underside and had pendulum rudders and elevator rudders at the pointed end .
use
During the First German Coastal Glider, Georg Gillert took off from the dunes of the Curonian Spit a few times with the “wing-controlled” aircraft . It turned out that it was impossible with the airplane to initiate a tight enough turn to stay in the upwelling zone after take-off . A few days later the sailor was damaged during a landing and was repaired in Berlin with the help of the Sablatnig company .
The machine was awarded the best design in comparison flying.
When the flight week was repeated in 1924, the glider sank after water ingress through an opening of the runner suspension after landing in the Baltic Sea . The glider was rescued and the rest of the time was used to catch up on the flight tests of the aircraft that had been modified compared to the previous year “by systematic small flights” .
Concrete details about the further story of the devil are not known.
Technical specifications
| Parameter | Data |
|---|---|
| crew | 1 |
| length | 5 m |
| span | 11.5 / 12.6 m |
| Torso height | 1.3 m |
| Wing area | 13.7 m² |
| Wing extension | 21st |
| Wing profile | Goettingen 441 |
| Glide ratio | |
| Slightest sinking | |
| Wing mass | 50 kg |
| Hull mass | 52 kg |
| Payload | 70 kg |
| Preparation mass | 106 kg |
| Takeoff mass | 176 kg |
| Wing loading | 13 kg / m² |
Web links
- "Devil" in the J2mcL Planeurs glider database
Individual evidence
- ↑ a b Carsten Karge: Test aircraft 1923 . In: Akademische Fliegergruppe (Ed.): Annual Report 2009/2010 . Berlin 2011, DNB 013347667 , p. 9-15 .
- ^ The 2nd German Coastal Gliding Competition in Rossitten (East Pr.) . In: Aviation . No. 10 , May 30, 1923, DNB 011239654 , p. 176 .
- ↑ Waldemar Möller: The little glider devil . In: Altherrschaft der Akademischen Fliegergruppe Berlin (Hrsg.): Chronik Akaflieg Berlin . Berlin 1977, DNB 800792807 , p. 18 .
- ^ A b c d Roland Eisenlohr : The Rhön glider flying competition 1923 in its technical evaluation . In: Zeitschrift für Flugtechnik und Motorluftschiffahrt . No. 17-22 , 1923, DNB 011474416 , p. 136-139 .
- ↑ a b c d e Werner v. Langsdorff : The glider . JF Lehmanns Verlag, Munich 1923, DNB 575531118 .
