Akaflieg Darmstadt D-9
| Akaflieg Darmstadt D-9 Consul | |
|---|---|
|
|
| Type: | Glider |
| Design country: | |
| Manufacturer: | |
| First flight: |
1923 |
| Number of pieces: |
1 |
.svg){kind=small}
The Akaflieg Darmstadt D-9 Konsul was a single-seat, cantilevered glider of the Academic Aviation Group of the Technical University of Darmstadt , which was named in honor of Consul Kotzenberg .
history
The aircraft was designed by Albert Botsch and Rudolf Spies for continuous / high-altitude and cross-country flight. Fritz Hoppe helped with questions of aerodynamics. The Academic Aviation Group received material support for the construction of the consul from Karl Kotzenberg, the consul general of Norway.
construction
The three-part, single-spar wing with a high aspect ratio with a torsion box covered with plywood originally had a span of 18.6 meters. The 8 m wide middle section was 1.20 m deep. The newly developed Göttingen 535 was used as the wing profile. The 60 cm wide fuselage with an elliptical cross-section, made up of two half-shells , had a large normal tail unit and was fitted with a rubber-sprung landing skid.
Aileron and rudder differentiation was used for the first time. After the large ailerons proved to be too sensitive, they were shortened so that the wingspan was also reduced to 18.2 m. The only instruments in front of the open cockpit were the altimeter and airspeed indicator that were integrated with the upper side into the fuselage.
use
The aircraft successfully took part in competitions and achieved a world record at the 1923 Rhön competition with Albert Botsch with a flight distance of 18.7 kilometers. The consul operated until 1927.
Technical specifications
| Parameter | Data | Modified ailerons |
|---|---|---|
| crew | 1 | |
| length | 6.35 m | |
| span | 18.60 m | 18.20 m |
| height | ||
| Wing area | 21.00 m² | |
| Wing loading | 9.1 kg / m² | |
| Wing extension | 16.66 | 15.8 |
| Wing profile | Gö 535 | |
| Glide ratio | 21.4 at 53 km / h (14.8 m / s) | |
| Slightest sinking | ||
| Payload | 85 kg | |
| Preparation mass | 185 kg | |
| Flight mass | 270 kg | |
| Top speed | ||
See also
Web links
- D-9 Consul on the website of Akaflieg Darmstadt
- D-9 Consul in the J2mcL Planeurs glider database
- Three-sided view of the D-9 Consul
Individual evidence
- ↑ a b c d e f Martin Simons: Gliders 1920–1945 . 2nd Edition. Eqip Werbung & Verlag GmbH, Bonn 2005, ISBN 3-9806773-6-2 , p. 26-30 .
- ↑ a b Georg Brütting : The most famous gliders . 1st edition. Motorbuch-Verlag, Stuttgart 1970, p. 29 f .