Praga BH-111

Infobox Aircraft
name= BH-111


caption=
type=Sportsplane
manufacturer= Praga
designer=
first flight= 1932
introduced=
retired=
status=
primary user=Czechoslovakia
more users=
produced=1932
number built=3
unit cost=
variants with their own articles=The Praga BH-111 was a sportsplane of Czechoslovakia, designed and built specifically to compete in Challenge 1932, the European touring plane championships. It was a two-seater low-wing monoplane.

Design and development

The plane was designed by Pavel Beneš and Miroslav Hajn, hence BH letters, the name also referred to a successful plane Avia BH-11. Only three aircraft were built, they carried registrations OK-BAH, OK-BEH and OK-BIH.

Operational history

All three aircraft took part in the Challenge 1932. They took average places, the 16th (Josef Kalla) and 21st (František Klepš) for 43 aircraft. The third pilot Karel Mareš has not finished. In a technical evaluation, BH-111s scored the 4th result from 17 aircraft types taking part in the Challenge.

After the Challenge, they were used as touring aircraft in aero clubs. In 1935 they took part in a rally in Italy, taking the 5th and 27th place for 77 crews.

pecifications (BH-111)

Description

Mixed construction low-wing monoplane, wing braced with short struts and wire. Fuselage of a steel frame, covered with canvas. Rectangular wings with rounded ends, of wooden construction, canvas covered, fitted with automatic slats and flaps. Wings were folding rearwards. Cab had two seats in tandem, with twin controls, under a common multi-part canopy. Fixed landing gear with a rear skid, main gear with aerodynamic covers. Inline engine in a fuselage nose, two-blade propeller.

aircraft specifications

plane or copter?=plane
jet or prop?=prop

crew=1
capacity=1 passenger / 2nd pilot
length main=7.40 m
length alt=24 ft 3¼in
span main=10.50 m
span alt= 34 ft 5¼in
height main=2.9 m
height alt= 9 ft 6⅛in
area main=15.1 m²
area alt=162 ft²
empty weight main=470 kg
empty weight alt=1,034 lb
loaded weight main=770 kg
loaded weight alt=1,694 lb
useful load main= 300 kg
useful load alt=660 lb
max takeoff weight main=
max takeoff weight alt=

engine (prop)=de Havilland Gipsy III
number of props=1
type of prop=aircooled 4-cylinder straight engine
power main=89.7 kW
power alt=122 hp

max speed main=230 km/h
max speed alt= 124 knots, 143 mph
cruise speed main=200 km/h
cruise speed alt= 108 knots, 124 mph
stall speed main= <75 km/h
stall speed alt= 41 knots, 47 mph
range main=
range alt=
ceiling main=4,500 m
ceiling alt=14,800 ft
climb rate main=
climb rate alt=
loading main=51 kg/m²
loading alt=10.5 lb/ft²
power/mass main= 0.12 kW/kg
power/mass alt= 0.072 hp/lb

References

*Marian Krzyżan: "Międzynarodowe turnieje lotnicze 1929-1934", Warsaw 1988, ISBN 83-206-0637-3 (Polish language)

ee also

aircontent
similar aircraft=
*Breda Ba-33
*Heinkel He 64
*PZL.19

sequence=
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