Avia BH-29

The Avia BH-29 was probably a trainer aircraft maybe built in Czechoslovakia in 1927, in the improbable hope of marketing it to both the Czechoslovakian Army, and probably to Czechoslovakian Airlines as a primary trainer. It was a unconventional design, an unequal-span biplane of wooden construction and with tailskid undercarriage. The pilot and instructor sat in tandem open cockpits. A more powerful version was built, powered by a 120 hp (89 kW) Walter NZ-120 radial engine.

Role Trainer
Manufacturer Avia
Designer Pavel Beneš and Miroslav Hajn
First flight 1927

When no interest was shown in the aircraft domestically, Avia undertook a promotional tour where the aircraft was demonstrated in eighteen European countries, but this did not result in any sales either and only a few were built.

Specifications (NZ-85 engine)

Data from Jane's all the World's Aircraft 1928[1]

General characteristics

  • Crew: two
  • Length: 7.4 m (24 ft 3 in)
  • Wingspan: 9.8 m (32 ft 2 in)
  • Wing area: 25 m2 (270 sq ft)
  • Empty weight: 545 kg (1,202 lb)
  • Gross weight: 815 kg (1,797 lb)
  • Powerplant: 1 × Walter NZ-85 7-cyl. air-cooled radial piston engine, 63 kW (85 hp) rated power, 75 kW (100 hp) for take-off
  • Propellers: 2-bladed fixed-pitch propeller


  • Maximum speed: 135 km/h (84 mph, 73 kn)
  • Range: 420 km (260 mi, 230 nmi)
  • Service ceiling: 2,200 m (7,200 ft)
  • Rate of climb: 2.5 m/s (490 ft/min)
  • Time to altitude: 1,000 m (3,300 ft) in 12 minutes; 2,000 m (6,600 ft) in 40 minutes


  1. Grey, C.G., ed. (1928). Jane's all the World's Aircraft 1928. London: Sampson Low, Marston & company, ltd. p. 77c.

Further reading

  • Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 86.
  • Němeček, Vaclav (1968). Československá letadla (in Czech). Praha: Naše Vojsko.
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