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and a cantilever ply and fabric covered all-flying tailplane, all control surfaces were statically balanced and mounted on ball bearings. Various engines of 16 to 32 hp could be fitted, with the majority of the production Bąk II's was the 32 hp
Sarolea Albatros engine driving a twoblade fixed pitch Szomański propeller.
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The Bąk was built primarily of wood with plywood in a semi-monocoque fuselage and cantilevered single spar wooden wings, with plywood skinned leading edge torsion boxes and wing roots, mid set on the fuselage with marked dihedral. The tail unit comprised a fin, with rudder, integral with the fuselage
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The Bąk won a FAI world record for duration of flight in a Class D motorglider. The aircraft flew 5hr 24 minute on less than 5 U.S. gallons (19 L; 4.2 imp gal) of fuel. It also won a record for altitude, reaching 15,075 ft (4,595 m).
136:– institute of gliding and motor-gliding techniques), for a cheap ultra-light aircraft suitable for converting trained glider pilots to powered flying. The Bąk I was an immediate success with excellent performance and good handling qualities, passing I.T.L. (
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140:– Technical aviation institute) and airworthiness tests without problems, also proving to have relatively good gliding performance.
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Fuel:40 L (8.80 imp gal; 10.57 US gal), Oil:4.5 L (0.99 imp gal; 1.19 US gal)
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180:, two- cylinder, horizontally opposed, two-stroke air-cooled engine, (SP-692 and SP-1102 are two known glider registrations).
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The prototype and first production machines fitted with an 13.4 kW (18 hp)
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1.5 m/s (300 ft/min) at 70 km/h (43 mph; 38 kn) engine off
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2-cyl air-cooled horizontally opposed piston engine, 24 kW (32 hp)
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two-cylinder horizontally opposed air-cooled engine, 25 built.
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Production aircraft fitted with a 23.9 kW (32 hp)
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Designer of the Bąk, Antoni Kocjan, became part of the
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Aircraft of comparable role, configuration, and era
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352:Take-off distance to clear 8 m (26 ft):
134:Instytut Techniki Szybownictwa i Motoszybownictwa
128:– glider workshops produced the Bᾳk, designed by
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308:180 km/h (110 mph, 97 kn)
338:24.6 kg/m (5.0 lb/sq ft)
299:130 km/h (81 mph, 70 kn)
293:152 km/h (94 mph, 82 kn)
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494:. Studio Editions: London. p. 29
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587:1930s Polish civil trainer aircraft
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228:12.2 m (40 ft 0 in)
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240:13.2 m (142 sq ft)
234:1.45 m (4 ft 9 in)
151:resistance and was killed in the
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592:Single-engined tractor aircraft
523:Daring missions of World War II
492:Jane's Encyclopedia of Aviation
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438:Daring missions of World War II
222:6 m (19 ft 8 in)
326:2.5 m/s (490 ft/min)
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108:(Horse-Fly) was a single seat
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320:5,200 m (17,100 ft)
138:Instytut Techniczny Lotnictwa
612:Aircraft first flown in 1937
278:wooden fixed pitch propeller
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567:RWD (aircraft manufacturer)
502:Polish Aircraft 1893 – 1939
411:Polish Aircraft 1893 – 1939
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347:0.0747 kW/kg (0.4545 hp/lb)
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10:
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490:Taylor, J. H. (ed) (1989)
124:Affiliated to D.W.L., the
252:325 kg (717 lb)
246:207 kg (456 lb)
202:Polish Aircraft 1893–1939
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370:Scheibe SF-24 Motorspatz
607:1930s Polish sailplanes
498:Cynk, Jerzy B. (1971).
407:Cynk, Jerzy B. (1971).
354:70 m (230 ft)
207:General characteristics
195:Specifications (Bąk II)
112:designed and built in
126:Warsztaty Szybowcowe
69:Warsztaty Szybowcowe
521:William B. Breuer.
436:William B. Breuer.
159:Operational history
506:. London: Putnam.
415:. London: Putnam.
304:Never exceed speed
149:Polish Underground
16:Polish motorglider
597:Mid-wing aircraft
546:Missing or empty
467:Missing or empty
178:Kroeber M4 Köller
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533:. August 1958.
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582:RWD aircraft
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460:cite journal
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110:motor glider
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44:Motor Glider
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284:Performance
272:Propellers:
262:Powerplant:
120:Development
116:from 1936.
88:March 1937
576:Categories
378:References
343:Power/mass
312:Endurance:
238:Wing area:
25:Kocjan Bąk
276:Szomański
274:2-bladed
226:Wingspan:
200:Data from
75:Designer
359:See also
168:Variants
314:4 hours
232:Height:
220:Length:
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183:Bąk II
114:Poland
59:Poland
383:Notes
214:Crew:
173:Bąk I
40:Role
552:help
508:ISBN
473:help
417:ISBN
264:1 ×
104:The
106:Bąk
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