Dietrich DP I.
| Dietrich DP I Sparrowhawk | |
|---|---|
|
|
| Type: | School and sport aircraft |
| Design country: | |
| Manufacturer: | |
| First flight: |
May 5, 1922 |
| Production time: |
1922 |
| Number of pieces: |
1 |
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The Dietrich DP I Sperber is a German training and sports aircraft of the 1920s, only one of which was built.
development
Richard Dietrich founded in 1922 in his hometown of Mannheim , the Richard Dietrich Flugzeugbau GmbH to convert to former military aircraft for civilian purposes. At the same time, when it was foreseeable that the construction ban on motorized aircraft set out in the Versailles Treaty for Germany would be lifted in the near future, he planned to build a sports aircraft based on the Fokker D.VII fighter aircraft from the beginning of the year . Max Gerner made the construction plans according to Dietrich's specifications, the construction was carried out at the same time in his small company under the direction of Pöhlmann and Dipl.-Ing. Geyer responsible. In contrast to the D.VII, the wingspan and wing area were reduced and the Mercedes in - line engine was replaced by a French rotary engine with 70 hp. In the spring the aircraft was completed and Dietrich took off for the first flight on May 5th, precisely on the day the construction ban in Sandhofen was lifted . The name was DP I Sperber , where DP stands for “Dietrich Passenger Double Decker” to emphasize the civil character of the construction. Originally, Dietrich wanted to build a single-seat aircraft, but since the pre-war Gnome engine produced 10 hp more than the 60 hp allowed for this class, he was forced to equip the Sparrowhawk with a second seat.
The public presentation took place at the trade show that took place in Munich in the summer of 1922 and resulted in two orders placed by former fighter pilot Paul Bäumer , which, for unknown reasons, were not carried out.
When French troops occupied the Ruhr area in January 1923 , Bäumer decided to relocate his operations to Kassel to be on the safe side. For this purpose, the equipment in his workshop was dismantled in the spring and sent by rail including the dismantled DP I. After the aircraft had been rebuilt in Kassel, it took off on May 9, 1923 in Waldau on its second maiden flight. In the summer from July 20th to August 12th the International Aviation Exhibition took place in Gothenburg and Dietrich used the opportunity to fly to Sweden with the DP I and present it to an international audience. At Dietrich's offer, Antonius Raab , who was also present, flew the plane on August 10 and is said to have reached an altitude of 2260 meters in twelve minutes, which is a remarkable achievement. The exhibition did not result in any commissions, but the meeting marked the beginning of the collaboration between Dietrich and Raab. The DP I was flown as a factory aircraft until Dietrich's company went bankrupt in November 1926, including by Kurt Katzenstein , and then sold. Their whereabouts are unknown.
Technical specifications
| Parameter | Data |
|---|---|
| crew | 1-2 |
| span | above 7.20 m, below 6.60 m |
| length | 5.90 m |
| height | 2.50 m |
| Wing area | 14.00 m² |
| Wing loading | 40 kg / m² |
| Power load | 8.0 kg / hp |
| Preparation mass | 340 kg |
| Payload | 220 kg |
| Takeoff mass | 560 kg |
| drive | a Gnôme engine with 70 HP (51 kW) |
| Top speed | 140 km / h near the ground |
| Rise time | 7 min at 1000 m altitude |
| Summit height | 3500 m |
| Radius of action | maximum 500 km |
literature
- Rolf Nagel, Thorsten Bauer: Kassel and the aviation industry since 1923 . Bernecker, Melsungen 2015, ISBN 978-3-87064-147-4 .
- 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. 70/71 .
Web links
Individual evidence
- ↑ Brinkmann / von Gersdorff / Schwipps, p. 70