Bäumer B IV
| Bäumer B IV booming wind | |
|---|---|
 Bäumer B IV |
|
| Type: | two-seat light aircraft |
| Design country: |
German Empire |
| Manufacturer: |
Bäumer Aero GmbH |
| First flight: |
1926 |
| Production time: |
1926-1928 |
| Number of pieces: |
3 |
The Bäumer B IV Sausewind was a single - engine low - wing aircraft that was developed and built by Bäumer Aero GmbH in the 1920s.
development
After the flying successes of the Bäumer B II , the brothers Siegfried and Walter Günter , Walter Mertens and Werner Meyer-Cassel developed the B IV. Outwardly, it was very similar to the B II, but was largely a new design. It was safe to fly even by inexperienced pilots. The aerodynamic changes alone made it possible to increase the top speed by 25 km / h to 210 km / h with the same 65 hp engine. In 1926 and 1927 only two aircraft were manufactured. They bore the registration numbers D-885 and D-1158. In 1928 the B IVa (D-1414) was built.
Paul Bäumer himself took off on June 1, 1927 with the second B IV (D-1158) for its maiden flight . On July 15, 1927, it crashed during a demonstration flight with the Rohrbach Rofix near Kastrup Airport . He was killed in the process.
After his death, Bäumer Aero GmbH continued the development of the B IV and began building the D IVa in September 1927. This aircraft was sold to the Hamburger Luftverkehrs-Gesellschaft mbH on March 16, 1929 . After its bankruptcy , the B IVa was sold on in June. The new owner fell with the machine after a daring flight maneuver in the Pötenitzer Wiek near Travemünde . The plane was destroyed, but the pilot got away with the horror.
Records
- On July 8, 1927, Bäumer set a new world altitude record of 6,782 m.
- On July 10, 1927, together with copilot Friedrich Puls, he set a speed record in the “two-seater” category. They flew a 100 km long measurement route with an average of 191.2 km / h.
- Ernst Petersen and Dr.-Ing. Werner von Langsdorff set a new speed record for light aircraft on October 4, 1928 with 214 km / h.
Technical specifications
| Parameter | B IVa Sausewind, D-1414 |
|---|---|
| span | 9.00 m |
| length | 6.25 m |
| Wing area | 11.20 m² |
| Preparation mass | 295 kg |
| Payload | 305 kg |
| fuel | 147 l / 106 kg |
| Max. Takeoff mass | 600 kg |
| Wing loading | 54 kg / m² |
| Power load | 9.2 kg / hp |
| Top speed | 230 km / h |
| Cruising speed | 180 km / h |
| Landing speed | 80 km / h |
| Service ceiling | 6000 m |
| Range | 1200 km |
| Engines | a three-cylinder radial engine Lawrance L-4 (Wright L-4) |
| power | 65 hp / 48 kW |
Web links
- Photos and data (accessed November 13, 2010)
- Lecture by Wolfgang Borgmann on April 15, 2010 with detailed photos PDF; 3.3 MB (accessed September 11, 2018)