Brditschka HB-3

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Template:Infobox aircraft

The Brditschka HB-3, HB-21 and HB-23 are a family of motor gliders of unorthodox configuration developed in Austria in the early 1970s.

Design and development

The unusual design was based on work done by Fritz Raab in Germany in the 1960s. The pilot and passengers sit in a fuselage pod with the engine and propeller behind them. The pod also carries the fixed tricycle undercarriage and the high cantilever wing. The tail is carried on a pair of booms that emerge from the top and bottom of the fuselage pod, the upper of which passes through the propeller hub. The HB-21 has a conventional tail and has two seats in tandem accessed by a sidewards-hinged canopy, while the HB-23 has a T-tail and side-by-side seating accessed via gull-wing doors in the canopy.

The Militky MB-E1 was a modified HB-3 with an 8-10 kW (11-13 hp) Bosch KM77 electric motor. It was the first full-sized, manned aircraft to be solely electrically powered. Flights of 12 minutes duration at up to an altitude of Script error: No such module "convert". were just within the Ni-Cd battery's capacity. Its first flight was on 23 October 1973.[1]

Variants

Brditschka HB-3
Single seat powered sailplane, powered by Script error: No such module "convert". Rotax 642 engine, Script error: No such module "convert". wingspan.[2]
HB-Flugtechnik HB 21
Tandem two-seat derivative of HB-3 with longer span (Script error: No such module "convert".) wings.[3]
HB-Flugtechnik HB 21/2400
HB-Flugtechnik HB 21/2400 B
HB-Flugtechnik HB 21/2400 V1
HB-Flugtechnik HB 21/2400 V2
HB-Flugtechnik HB 23/2400
HB-Flugtechnik HB 23/2400 SP
HB-Flugtechnik HB 23/2400 Scanliner
Observation version of HB-23 with bubble canopy and provision to carry FLIR or LLTV pods under the wings.[4]
HB-Flugtechnik HB 23/2400 V2
Militky MB-E1
electrically powered version.[1]

Specifications (HB-23/2400 Hobbyliner)

Template:Aircraft specs

See also

Related development

Aircraft of comparable role, configuration, and era

References

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  1. ↑ a b Taylor 1974 p.573
  2. ↑ Cite error: Script error: No such module "Namespace detect".Script error: No such module "Namespace detect".
  3. ↑ Taylor 1976, p. 549.
  4. ↑ Cite error: Script error: No such module "Namespace detect".Script error: No such module "Namespace detect".

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External links

Template:Sister project

Template:HB-Flugtechnik aircraft

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