Akaflieg Darmstadt D-30
| Akaflieg Darmstadt D-30 | |
|---|---|
| Type: | Glider |
| Design country: | |
| Manufacturer: | |
| First flight: |
Mid-1938 |
| Number of pieces: |
1 |
The Akaflieg Darmstadt D-30 Cirrus was a single-seat, cantilevered shoulder- wing glider of the Academic Aviation Group of the Technical University of Darmstadt . On July 7, 1938, Bernhard Flinsch set a world record for single-seaters over 305.624 km from Bremen to Lübeck with a return to the starting point with the D-30, which B. Kimmelman could only beat with an RF-7 over a year later .
construction
The aircraft, designed by R. Schomerus, Helmut Alt and Hans-Joachim Puffert in 1933 and built from 1936 to the end of May 1938 in the Akaflieg workshop, was created in a composite construction using the light metals duralumin for the wing spar and electron for the riveted tail unit beam . The three-part trapezoidal wing with flaps had a "laminarized" profile and outer wings that could be adjusted in flight by 10 ° upwards and 2.5 ° downwards. The cockpit in the wooden hull had a removable cover, acrylic glass hood and air-sprung runner; the self-supporting tail unit consisted of plywood-clad fins and fabric-covered oars with rope drive.
Technical specifications
| Parameter | Data |
|---|---|
| crew | 1 |
| length | 6.87 m |
| span | 20.10 m |
| height | |
| Wing area | 12.00 m² |
| Wing loading | 22.9 kg / m² |
| Wing extension | 33.6 |
| Wing profile | NACA 24 |
| Glide ratio | 37.6 at 77 km / h |
| Slightest sinking | 0.55 m / s at 72 km / h |
| Payload | 85 kg |
| Preparation mass | 203 kg |
| Flight mass | 288 kg |
| Minimum speed | 53 km / h |
| Top speed | 300 km / h |
See also
Web links
- D-30 on the website of Akaflieg Darmstadt
- D-30 in the J2mcL Planeurs glider database
Individual evidence
- ↑ Wolf Hirth (Hrsg.): Handbuch des Segelfliegens. Franckh'sche Verlagshandlung, Stuttgart 1938, p. 324
- ^ Gerhard Wissmann: Adventure in wind and clouds. The history of gliding. Transpress, Berlin 1988, ISBN 3-344-00275-9 , p. 390
- ↑ a b Georg Brütting: The most famous gliders . 1st edition. Motorbuch-Verlag, Stuttgart 1970, p. 75 f .