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easy to fly and to land, which it did at low speeds and in short distances. A series of short flights led to some empennage modifications and the fitting of a better-matched propeller enabled the Cykacz to log a total of about forty rather short flights. Its engine remained unreliable and the biplane was both underpowered in flight and of short range. It appeared in an exhibition at the Warsaw
Technical University in August 1925 but by 1926 DÄ
browski had abandoned it and was working on a new design.
26:
225:
When first tested, the Cykacz was reluctant to take off, partly because the Tomtit engine was unreliable and had to be kept below the high output shaft speeds for which the propeller was designed. Babinski took it on its first flight on 26 February 1925. Once off the ground it proved responsive and
217:
was fixed and conventional, with a track of 1.03 m (40.6 in). A single axle was held on two V-struts from the lower fuselage, with rubber chord shock absorbers. The V-struts had ply fairings and the axle was enclosed within a small lift-giving
171:
structure with wooden frames and ply skin and the engine was in its forward part, though with its cylinders exposed for cooling. The small diameter propeller, designed by
Dabrovsky, had a dished
140:, though only on the upper wing; ailerons apart, the upper and lower wings were identical. The great majority of biplanes have had upper and lower wings braced together with
93:, intended to provide wider access to flying. Though it was exceptionally aerodynamically clean, it was under-powered and had limited range. Only one was built.
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elsewhere. The leading edges were straight and unswept out to semi-elliptical tips and the inboard part of the wings had parallel
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210:, which was rounded, low but broad, extended down to the keel. These control surfaces were wooden with fabric covering.
491:
405:
148:. The upper wing was supported high over the fuselage on a pair of outward-leaning N-struts with the forward V
116:, was an unusually clean biplane with an entirely wooden structure. Its one-piece wings were built around two
113:
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and the centre of the lower wing was attached to the bottom of the fuselage. There was significant
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and fabric elsewhere. It was mounted on the top of the fuselage and, together with its separated
203:
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8:
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2-bladed designed by Jerzy
Dabrowski, 1.35 m (4 ft 5 in) diameter wooden
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318:, 12 kW (16 hp) at 2,400 rpm and 18 kW (24 hp) at 3,600 rpm.
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112:'s first aircraft design, produced early in 1924 while he was a student at the
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but the Cykacz had none; instead, the fairly thick section wings were
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inboard but tapered outboard. These outboard regions carried tapered
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that blended into the fuselage's lines. The biplane's single, open
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where there was a cut-out to increase the pilot's field of view.
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was, like the wings, in a single piece with a ply-covered
89:(Ticktock) was an unusual, small, low-powered, single-seat
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that was integral with the fuselage and ply covered. Its
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11 L (2.4 imp gal; 2.9 US gal)
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100 km/h (62 mph, 54 kn) approximately
159:
The Cykacz was powered by a 12 kW (16 hp)
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167:. The whole fuselage was a smooth, oval section
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345:50 km/h (31 mph, 27 kn)
206:, was roughly elliptical in plan. Its
105:Constructor at the D.1 Cykacz aircraft
396:. London: Putnam Publishing. p.
237:Cynk (1971) p.115 except where noted.
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13:
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269:1.65 m (5 ft 5 in)
257:3.7 m (12 ft 2 in)
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351:about 40 mph (64 km/h)
24:
482:Single-engined tractor aircraft
275:8.2 m (88 sq ft)
263:5 m (16 ft 5 in)
186:The Cykacz had a conventional
1:
361:
487:Aircraft first flown in 1923
357:10ā15 m (33ā49 ft)
7:
472:1920s Polish sport aircraft
114:Warsaw Technical University
10:
508:
429:"Nowy platowiecz sportowy"
36:Single seat sport aircraft
492:Conventional landing gear
392:Polish Aircraft 1893-1939
298:227 kg (500 lb)
292:125 kg (276 lb)
23:
18:
242:General characteristics
106:
97:Design and development
104:
388:Cynk, Jerzy (1971).
179:was under the upper
87:DÄ
browski D.1 Cykacz
439:(1). January 1924.
107:
355:Landing distance:
312:Blackburne Tomtit
161:Blackburne Tomtit
142:interplane struts
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69:26 February 1923
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163:, an air-cooled
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38:Type of aircraft
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454:(6). June 1925.
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130:fabric covering
110:Jerzy DÄ
browski
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60:Jerzy DÄ
browski
45:National origin
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349:Landing speed:
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337:Maximum speed:
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302:Fuel capacity:
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230:Specifications
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169:semi-monocoque
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165:V-twin engine
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66:First flight
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448:Mlody Lotink
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433:Mlody Lotink
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343:Stall speed:
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200:leading edge
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75:Number built
330:Performance
322:Propellers:
314:air-cooled
308:Powerplant:
146:cantilevers
19:D.1 Cykacz
466:Categories
362:References
273:Wing area:
285:Dewoitine
261:Wingspan:
235:Data from
204:elevators
196:tailplane
188:empennage
150:faired in
56:Designer
477:Biplanes
444:"images"
220:aerofoil
138:ailerons
124:covered
120:and had
280:Airfoil
267:Height:
255:Length:
190:with a
177:cockpit
173:spinner
154:stagger
128:, with
122:plywood
91:biplane
404:
316:V-twin
208:rudder
50:Poland
398:113-5
249:Crew:
134:chord
118:spars
33:Role
452:1925
441:and
437:1924
402:ISBN
310:1 Ć
213:Its
85:The
251:One
192:fin
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450:.
446:.
435:.
431:.
416:^
400:.
370:^
222:.
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79:1
410:.
282::
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