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There is some uncertainty about the year of the first light, but according to Cynk this occurred in the summer of 1932. After successful flight trials a short production run of the CW 5.bis/33 followed. The first air-towed launch was in May 1933. 1934 saw an improved version, the CW 5.bis/34. A final
130:, by 1926 it had workshops in Lwów which began building the glider designs of ZASPL member Wacław Czerwiński. The 1931 CW 5 was his response to a call from the government for a high performance glider. His earliest draft, the CW 5, specified the Gôttingen Gô 652
227:, it used a different airfoil, a different wing plan and shorter wing struts, though the span was unchanged. The fuselage was about 6% shorter. Most noticeably, it had a tailplane, which was integral with the fin. Either one or two were built.
101:
high performance sailplane, produced and developed between 1933 and 1935. It set several national records, competed at both national and international level and remained a Polish gliding club mainstay until the outbreak of
239:
period. Examples also took part in many national competitions and set a series of national records for altitude and distance. For example, on 4 October 1935 Żabski reached 2,540 m (8,330 ft). The same year
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was its most unconventional feature. Semi-elliptical in plan and with a ply covered leading edge and fabric elsewhere, it was mounted on a short, streamlined V-strut clear and ahead of the integral, ply covered
216:
version, the CW 5.bis/35, had an aerodynamically cleaner, deeper and strengthened fuselage. About ten of this version were produced. The final airframe count over all models was about twenty.
304:
1937 derivative with different airfoil and wing shape, shorter wing struts and fuselage. Revised cockpit and new empennage, with a conventional tailplane integral with the fuselage and fin.
195:
Its pilot sat ahead of the leading edge; the prototype had an open cockpit but in the production models it was enclosed with multi-panel glazing. The fuselage was a semi-
150:
airfoil from the Warsaw
Aerodynamic Institute. Wind tunnel results for it were much closer to expectations and the CW 5.bis was completed in the ZASPL workshops in 1932.
219:
In 1936 Michal
Blaicher produced a markedly different derivative of the CW 5.bis/35. It was constructed in the workshops of the W.O.S. (Military Gliding Camp) at
241:
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structure which became progressively more slender aft of the wing and had a sprung landing skid mounted below the forward part. The CW 5.bis's
568:
507:
475:
563:
223:
and first flew in 1937, appearing in public in August of that year at the Fifth
National Glider Contest. Named the
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set the women's altitude record at 2,235 m (7,333 ft). One CW 5.bis was flown by Żabski on the
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165:
173:
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467:
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tests proved very disappointing. The CW 5.bis design that followed used a thinner and lower
536:
8:
502:(2nd revised ed.). Königswinter: EQIP Werbung & Verlag GmbH. pp. 209, 212.
185:
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The CW 5/bis was widely used for advanced pilot training in Poland in the remaining pre-
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Technical
University, was the oldest aviation organization in Poland. Revived after
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contest of 1937, where it was placed eighth and helped Poland into second place.
180:. Out to half span the wing had a rectangular plan but beyond this long, curved
142:, despite the lack of full information on its characteristics at the time, and
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208:. The latter was narrow and ply covered and carried a curved, fabric covered
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from the lower fuselage to the spar and false spar of the central section.
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behind. Only the inner part, about a quarter of the span, carried
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1935 version with a deeper, strengthened and cleaned-up fuselage.
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1933 first production version with detachable cockpit cover.
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184:, mounted at an angle to the centre-line, narrowed the
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44 km/h (27 mph, 24 kn) minimum speed
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of 18, very high for the 1930s. It was covered with
122:ZASPL, the Aviation Association of students of the
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172:ahead of the spar, forming a D-box, and with
212:. There was a short tailskid under the fin.
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537:"CW-5 bis, 1933 (WOS, WOS-37 "Splett")"
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417:148 km/h (92 mph; 80 kn)
188:to fine tips. The wing was braced by V-
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466:. London: Putnam Publishing. pp.
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411:0.6 m/s (120 ft/min) minimum
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13:
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342:17.8 m (58 ft 5 in)
336:7.86 m (25 ft 9 in)
14:
580:
372:Warsaw Aerodynamic Institute 192
354:17.4 m (187 sq ft)
348:1.6 m (5 ft 3 in)
23:
316:J.Cynk, 1971 except where noted
292:1934 version with refinements.
1:
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569:Aircraft first flown in 1932
7:
309:Specifications (CW 5bis/34)
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10:
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153:The Cw 5.bis had a single
462:Polish Aircraft 1893-1939
384:224 kg (494 lb)
378:144 kg (317 lb)
22:
18:
280:prototype, open cockpit.
564:1930s Polish sailplanes
498:Simons, Martin (2006).
321:General characteristics
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119:
110:Design and development
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264:CW 5.bis/35 in flight
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248:in the international
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500:Sailplanes 1920-1945
458:Cynk, Jerzy (1971).
403:Maximum glide ratio:
231:Operational history
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136:Alexander Lippisch
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95:Czerwiński CW 5bis
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69:Wacaw Czerwiński
35:high performance
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138:had used on the
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40:Type of aircraft
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221:Ustjanowa Górna
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47:National origin
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415:Towing speed:
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409:Rate of sink:
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382:Gross weight:
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376:Empty weight:
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301:WOS-37 Splett
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74:First flight
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542:19 September
540:. Retrieved
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397:Stall speed:
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359:Aspect ratio
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242:Maria Younga
237:World War II
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166:aspect ratio
159:high mounted
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104:World War II
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83:Number built
390:Performance
295:CW 5.bis/35
289:CW 5.bis/34
283:CW 5.bis/33
272:CW 5.bis/35
246:Wasserkuppe
144:wind tunnel
128:World War I
558:Categories
422:References
352:Wing area:
140:RRG Fafnir
405:21.5 best
340:Wingspan:
314:Data from
197:monocoque
162:gull wing
66:Designer
37:sailplane
277:CW 5.bis
256:Variants
201:elevator
182:ailerons
178:dihedral
164:with an
118:CW 5 bis
368:Airfoil
346:Height:
334:Length:
170:plywood
132:airfoil
506:
474:
210:rudder
190:struts
174:fabric
148:camber
99:Polish
97:was a
61:ZASPL
52:Poland
468:693–5
328:Crew:
186:chord
134:that
87:c.20
77:1932
32:Role
544:2018
504:ISBN
472:ISBN
363:18.2
250:Rhön
155:spar
124:Lwów
93:The
330:One
206:fin
560::
518:^
486:^
470:.
430:^
157:,
106:.
546:.
512:.
480:.
370::
361::
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