Avia B-158
| Avia B-158 | |
|---|---|
|
|
| Type: | Bomb and reconnaissance aircraft |
| Design country: | |
| Manufacturer: | |
| First flight: |
1938 |
| Commissioning: |
- |
| Number of pieces: |
1 |
The Avia B-158 was a Czechoslovak military multipurpose aircraft from the second half of the 1930s.
development
Avias designer Robert configured Nebesář 1935, the twin-engined aircraft bomb average B-58 , for the air-cooled as driving two 17-Rk - radial engines have been provided. In the same year Avia began the license production of the much more powerful Spanish V-engine HS 12Ydrs and so it was decided in 1936 to build the aircraft with these engines as the B-158. In addition, Nebesář made a few other changes: The originally rigid landing gear was designed to be retractable and the normal tail unit with a single fin was replaced by a double tail unit . The wing was designed so that the center piece and outer surfaces formed a gull wing .
The prototype was completed in the summer of 1938 and began flight tests. At the beginning of the Sudeten crisis in October and the subsequent occupation of Czechoslovakia in March 1939, the tests were not yet completed and the B-158 was taken over by the occupying forces. In the summer of 1939, the flights were then continued under German supervision. Since there was apparently no further use for the aircraft after its termination, the B-158 was finally scrapped.
construction
The B-158 was a cantilever low- wing aircraft in all-metal half-shell construction with a smooth sheet metal - clad fuselage made of duralumin . The three-part hydrofoil with a trapezoidal plan was made of the same material, had hydraulically operated expansion flaps and was kinked. Four fuel tanks with a capacity of 250 l each were housed in its middle section. The reconnaissance version received two additional tanks with 320 l each in the fuselage to increase the range. The self-supporting tail consisted of the horizontal stabilizer and two side fins at the ends. The oars were fabric-covered metal constructions and had trim tabs . The chassis was formed by the two main wheels, which were mounted between spring struts and retractable to the rear into the engine pods, and a non-retractable rear wheel.
Technical specifications
| Parameter | Data |
|---|---|
| crew | 3 (scouts) or 4 (bombers) |
| span | 16 m |
| length | 12 m |
| Wing area | 42.7 m² |
| Wing extension | 6th |
| Wing loading | 155 kg / m² |
| Empty mass | 4300 kg |
| Takeoff mass | normal 6600 kg maximum 7000 kg (reconnaissance aircraft) maximum 7260 kg (bomber) |
| drive | Two water-cooled twelve-cylinder - V engines Avia HS 12drs with two dreiblätterigen Hispano-Hamilton Verstelluftschrauben |
| power | 860 PS (633 kW) each at an altitude of 3000 m |
| Fuel volume | 1000 l (bomber) 1640 l (reconnaissance aircraft) |
| Top speed | 365 km / h near the ground, 435 km / h at an altitude of 4500 m |
| Rate of climb | 7 m / s |
| Rise time | 11 min at 5000 m altitude |
| Service ceiling | 8500 m |
| Range | 1850 km (reconnaissance aircraft) 1000 km (bomber) |
| Armament | a rigid 7.7 mm machine gun a movable 7.7 mm machine gun in the back of the fuselage a movable 7.7 mm machine gun in the floor of the fuselage (only for reconnaissance) |
| Bomb load | 900–1000 kg: 500 kg on six suspensions in the bomb bay + one 500 kg bomb in the bomb bay or two 200 kg bombs on external beams under the fuselage |
literature
- Peter Alles-Fernandez (Ed.): Aircraft from A to Z. Volume 1: Aamsa Quail – Consolidated P2Y. Bernard & Graefe, Koblenz 1987, ISBN 3-7637-5904-2 , p. 132.
- Werner von Langsdorff : Handbook of aviation. Year 1939, 2nd, unchanged edition, J. F. Lehmann, Munich 1937, p. 223.
- Václav Němeček: Československá letadla. Naše Vojsko, Prague 1968, pp. 108/109 and 290/291.
