Raab double room
| Double room | |
|---|---|
|
|
| Type: | Glider |
| Design country: | |
| Manufacturer: | |
| First flight: |
5th August 1951 |
| Number of pieces: |
about 400 |
The Doppelraab is a two-seater glider manufactured in a composite construction .
history
The Munich trade teacher Fritz Raab (1909–1989) developed the Doppelraab around 1949/50 and built the first test model at the Aero Club Dachau. The first flight took place on August 5, 1951 on the occasion of the Rhöntreffen on the Wasserkuppe .
construction
The aim of the construction was to create an aircraft for glider training that was just as easy to build as it was to be flown and maintained. To this end, the designer Fritz Raab went some unusual ways. For example, the seat of the flight instructor is greatly increased, which enables him to operate the control stick attached to the front directly from behind. In this way it is possible to dispense with an expensive double tax. In the cockpit area, the fuselage consisted of tubular steel, from the trailing edge of the wings, the rear fuselage section was made of wood, as were the wings and rudder. Deviating from this, there were also hulls that were made entirely of tubular steel.
variants
Several modifications were made by 1955, so that there were a total of six different series. There were three specimens of the V1 test series that attracted attention with their unusual chassis with two wheels arranged one behind the other. The variants V2 and V3 were built by Hirth and had different seats compared to the original design. From version V5, spoilers were built into the wings, while version V6 had a wingspan that was increased by 64 centimeters, which should bring improved glide performance. A total of approx. 400 Doppelraab were built, approx. 100 self-made by associations and approx. 300 by the Schempp-Hirth company in Kirchheim / Teck.
Technical specifications
| Parameter | Data |
|---|---|
| crew | 1 + 1 |
| length | 6.90 m |
| span | 12.76 / 13.40 m |
| height | 1.90 m |
| Wing area | 18 / 17.4 m² |
| Wing loading | Max. 19.4 kg / m² |
| Wing extension | 9.05 |
| Glide ratio | 20 at 55 km / h |
| Slightest sinking | 0.85 m / s at 50 km / h |
| Empty mass | 185 kg |
| Max. Takeoff mass | 350/420 kg |
| Minimum speed | 50 km / h |
| Top speed | 190/160 km / h |
Received aircraft
- OY-XIT in Dansk Veteranflysamling , Doppelraab IV, formerly D-6351.
- Doppelraab IV in the Flugwerft Schleissheim . The exhibit was the first aircraft of the Ikarus Luftsportclub in 1953 and was flown at the Schleissheim airfield until 1970.
- OE-0333 in the Aviaticum Aviation Museum , Doppelraab IV
- D-4389 in the German Glider Museum , Doppelraab V, 1951
- D-5436 "Mösch" Bonn-Hangelar, Doppelraab V (Plant No. 1), built in 1955
- D-6064 of the Flugsportclub eV Hannover, Doppelraab V (work no. 534), built in 1953 - ready to fly
- D-8358 of the Fliegergruppe Kornwestheim , Doppelraab IV (Plant No. 2), built in 1960
- D-9052 "Graf Zeppelin" of the Luftsportclub Friedrichshafen , Doppelraab V (built in 1952, factory no. 513), the club's first aircraft; it was flown until 1977, restored between 2004 and 2008 and has been flying again since then.
- D-6148 of the LSV Burgdorf
- D-6150 of the DGzEhF, Doppelraab 7
- D-8475 - private owner association; Doppelraab VI - built in 1963 - ready to fly
- D-7095 - private owner association (Mönchengladbach-Wanlo), Doppelraab VI (plant no. 02), built in 1967
- D-8155 - private property (Iserlohn-Sümmern) - airworthy
- D-8587 at FSR Kraichgau eV
See also
Web links
Individual evidence
- ^ Fritz Raab † . In: aerokurier . No. 11 , 1989, pp. 150 .
- ^ Double Raab 4. In: flymuseum.dk. Retrieved on July 9, 2020 (Danish): “Flyet her er bygget i årene 1960–64 af HOYA Segelfliegerverein e. V., Weser i Tyskland. Tysk registrering var D-6351. C / n .: 3/101. "
- ↑ Flugwerft Schleißheim : Doppelraab IV, accessed on July 9, 2020
- ↑ Raab "Doppelraab IV" OE-0333. In: exhibits. Aviaticum Aviation Museum , accessed on July 9, 2020 .
- ↑ German Glider Museum ( Memento from December 16, 2016 in the Internet Archive ): School double-seater "Doppelraab V", accessed on March 2, 2009
- ↑ Andreas Helfer: Luftsportverein Bonn / Rhein Sieg celebrates the birthday of gliders: The "Mösch" has been flying for 60 years. In: Kölner Stadt-Anzeiger. Retrieved May 26, 2016 .
- ↑ Doppelraab. Flugsportclub eV Hannover, accessed on February 29, 2020 (with technical data).
- ↑ Fliegergruppe Kornwestheim : Aircraft Park, accessed on June 30, 2009
- ^ Luftsportclub Friedrichshafen ( Memento from April 20, 2013 in the Internet Archive ): Aircraft park, accessed on August 18, 2010
- ↑ Doppelraab. Luftsportverein Burgdorf e. V., accessed on July 4, 2011 (with technical data).
- ↑ Raab Doppelraab. In: dgzehf.de. German Society for the Preservation of Historic Aircraft, accessed on March 1, 2017 (with technical data).
- ↑ aircraft park . Retrieved July 9, 2020 .