Avia BH-11
| Avia BH-11 | |
|---|---|
.jpg) Avia BH-11 with folded right wing in the aviation museum Kbely |
|
| Type: | School and sport aircraft |
| Design country: | |
| Manufacturer: | |
| First flight: |
1923 |
| Production time: |
1923-1929 |
| Number of pieces: |
18-19 |
The Avia BH-11 was a Czechoslovak sports and training aircraft from the 1920s that was used in both civil and military applications.
development
The BH-11 was designed by Pavel Beneš and Miroslav Hajn in 1923 and was based closely on the BH-9 that was made in the same year . In terms of its optical appearance, it was largely identical to this, and mainly differed in the use of rectangular instead of elliptical frames in the front part of the fuselage. The drive, an air-cooled NZ-60 radial engine from Walter , was taken over from its predecessor. The wings could be folded onto the fuselage to save space. The main customers were the Czechoslovak Air Force, which used 15 units under the designation B.11 or Bk.11 for pilot training and liaison flights. In 1926 two specimens with the serial numbers 17 and 18, specially designed for domestic and foreign flight competitions, were created. They were designated as BH-11C and could be recognized by their wings, which were 11.10 m long , in contrast to the basic version. With this version, the Coppa d'Italia, which a BH-9 had won for Czechoslovakia a year earlier, was successfully defended in 1926. The Paris-Orly touring aircraft competition and several domestic performance comparisons in 1926 were just as victorious. A final version specially tailored for a competition was developed for the European tour of 1929 and named BH-11B Antelope . It was slightly larger overall and equipped with a more powerful Walter Vega engine with 63 kW, which increased the top speed by around 20 km / h. Only one example is said to have been built with the (symbolically assigned) work number 1001, but two BH-11s with this drive were ultimately registered for the competition, which were flown by František Klepš and Václav Vlček. Klepš was able to take one of the top three places in the technical comparison, but only came in 7th in the overall ranking, which showed the limits of the construction. The successors were the BH-10 and BH-12 .
Technical specifications
| Parameter | Data BH-11 | Data BH-11B Antelope |
|---|---|---|
| crew | 1-2 | |
| length | 6.64 m | 6.82 m |
| span | 9.72 m | 10.40 m |
| Wing area | 13.60 m² | 13.75 m² |
| Empty mass | 379 kg | |
| Max. Takeoff mass | 579 kg | 627 kg |
| drive | an air-cooled five-cylinder - radial engine Walter NZ 60 | an air-cooled five-cylinder radial engine Walter Vega |
| power | 60 hp (44 kW) | 86 hp (63 kW) |
| Top speed | 155 km / h | 176 km / h |
| Cruising speed | 155 km / h | |
| Summit height | 3500 m | |
| Range | 600 km | 700 km |
literature
- Peter All-Fernandez (ed.): Aircraft from A to Z . Aamsa Quail-Consolidated P2Y. tape I . Bernard & Graefe, Koblenz 1987, ISBN 3-7637-5904-2 , p. 135/136 .
- Hans – Joachim Mau: Czechoslovak aircraft from 1918 until today . Transpress, Berlin 1987, ISBN 3-344-00121-3 , p. 74/75 .
- Václav Němeček: Airplanes . Civil aircraft from the years 1903–1957. Dausien, Hanau 1991, ISBN 3-7684-0125-1 , p. 108/109 .
