147:. The measurements were to be made at altitudes between 10,000 m (32,800 ft) and 14,000 m (45,900 ft). The pressurization system was fed from a large scoop intake below the engine into engine driven compressors. The pressurized cabin, slightly wider than high had an average diameter of about 2.45 m (8 ft 0 in) allowing the two observers comfortable working room and a total cabin volume of 11 m (390 cu ft). They had observation windows in the cabin roof and in its floor. The crew positions were also in the pressurized region: the pilot's
163:
143:. When work on the design resumed at the war's end these engines were replaced with a similarly arranged Daimler-Benz pair, resulting in a revised type, the NC.3021. The Belphégor was intended to provide a high altitude laboratory for studies of the meteorology of the upper atmosphere, high altitude aerodynamics and also of incoming
26:
258:. Flight tests were made difficult, if not dangerous, by the DB 610's tendency to overheat and they were abandoned either in 1947 in the absence of financial support or in 1949, after only forty flying hours, because of the continuing mechanical problems.
451:
239:
structure supported the double skinned cabin and a final, wooden tail section. The tail unit was conventional, with a single tall straight edged, round topped
788:
803:
542:
808:
520:
508:
350:
inverted, water-cooled engines geared together onto a single propeller shaft, 2,200 kW (2,950 hp) at sea level
535:
247:. All the flight controls, whether on the wings or the tail, were both dynamically and aerodynamically balanced. The
798:
319:
227:
fuselage was in three sections; the metal forward part contained the German-designed 2,200 kW (2,950 hp)
232:
235:
in the nose and driving a single four blade propeller as well as the pressurization system. Behind it a tubular
255:
212:
166:
Museum-preserved DB 610 "power system" twin-crankcase "coupled engine", similar to the
Belphegor's powerplant.
793:
528:
140:
119:. Only one was completed and it was not a success, in part because of problems with its unusual engine.
762:
747:
721:
716:
576:
426:
216:
431:
343:
231:
A twin-crankcased "power system" engine unit weighing some 1.5 tonnes by itself, with its circular
228:
181:
757:
656:
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220:
696:
504:
136:
200:
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767:
641:
636:
631:
782:
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was a French high altitude research aircraft designed and built at the end of
192:
with two auxiliary spars which were wooden in the outer sections. The broad
236:
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177:
159:. Two other crew, navigator and radio operator sat wholly within the cabin.
377:
449 km/h (279 mph, 242 kn) at 12,000 m (39,300 ft)
25:
371:
560 km/h (348 mph, 302 kn) at 9,800 m (32,000 ft)
204:
185:
174:
152:
208:
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49:
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design, an ultimately unbuilt aircraft powered by a coupled pair of
552:
Société Nationale de
Constructions Aéronautiques du Centre (SNCAC)
551:
161:
59:
524:
240:
483:. London: Sampson, Low, Marston and Co. Ltd. pp. 113–4c.
435:. Vol. LI, no. 2007. 12 June 1947. p. 534.
139:
engines mounted side by side in the nose driving coaxial
356:
4-bladed, 4.5 m (14 ft 9 in) diameter
740:
559:
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8:
494:
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211:, fitted with tabs, were metal framed but
254:Its first flight was on 6 June 1946 from
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481:Jane's All the World's Aircraft 1949-50
405:
15:
188:and built around a single steel main
127:The Belphégor had its origins during
7:
446:
444:
442:
503:. Paris: Éditions EPA. p. 50.
303:23.55 m (77 ft 3 in)
297:17.50 m (57 ft 5 in)
215:. Two part, hydraulically operated
184:wing was strongly tapered in plan,
789:1940s French experimental aircraft
501:Les Avions Francais de 1944 à 1964
309:5.82 m (19 ft 1 in)
14:
315:49.8 m (536 sq ft)
251:had inward retracting main legs.
336:10,000 kg (22,046 lb)
151:placed his head above the upper
36:Upper altitude research aircraft
24:
804:Single-engined tractor aircraft
330:7,500 kg (16,535 lb)
389:13,000 m (42,000 ft)
105:SNCAC NC.3020 wartime project
1:
809:Aircraft first flown in 1946
346:side by side pair of DB 605
395:140 km/h (87 mph)
825:
479:Bridgman, Leonard (1949).
270:Flight 12 June 1947, p.534
499:Gaillard, Pierre (1990).
23:
18:
452:"SNSC NC.3021 Belphégor"
256:Toussus-le-Noble Airport
249:tail wheel undercarriage
180:. The three part, high
276:General characteristics
113:SNCAC NC.3021 Belphégor
223:were fitted. Its semi-
167:
123:Design and development
427:"Solely for research"
203:into a near circular
165:
344:Daimler-Benz DB 610A
170:The Belphégor was a
137:Hispano-Suiza HS.12Z
334:Max takeoff weight:
229:Daimler-Benz DB 610
168:
19:NC.3021 Belphégor
799:Mid-wing aircraft
776:
775:
554:(Centre) aircraft
131:in Marcel Roca's
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387:Service ceiling:
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102:
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38:Type of aircraft
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219:changing metal
199:were carefully
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45:National origin
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11:
5:
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794:SNCAC aircraft
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393:Landing speed:
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369:Maximum speed:
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263:
262:Specifications
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213:fabric covered
186:mid-positioned
155:under a clear
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101:Developed from
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510:2-85120-350-9
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375:Cruise speed:
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328:Empty weight:
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291:Two observers
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221:slotted flaps
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133:SNCAC NC.3020
130:
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74:First flight
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56:Manufacturer
55:
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43:
42:
35:
32:
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27:
22:
17:
758:Chardonneret
752:
731:
500:
480:
455:. Retrieved
430:
392:
386:
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368:
361:
359:
353:
339:
333:
327:
320:Aspect ratio
318:
312:
306:
300:
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282:
275:
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269:
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253:
182:aspect ratio
169:
132:
129:World War II
126:
117:World War II
112:
110:
91:Number built
77:6 June 1946
69:Marcel Roca
362:Performance
354:Propellers:
340:Powerplant:
145:cosmic rays
783:Categories
457:13 January
400:References
381:Endurance:
313:Wing area:
197:wing roots
172:cantilever
141:propellers
753:Belphégor
560:by number
301:Wingspan:
289:Capacity:
267:Data from
225:monocoque
178:monoplane
66:Designer
768:Martinet
763:Cormoran
233:radiator
209:ailerons
205:fuselage
175:mid-wing
153:fuselage
82:Retired
748:Abeille
741:by name
732:NC.3021
717:NC.2001
712:NC 1080
707:NC.1071
702:NC.1070
612:NC.47-2
607:NC.47-1
602:NC.47-0
587:NC.4-10
307:Height:
295:Length:
149:cockpit
727:NC.271
722:NC 211
697:NC.900
692:NC.860
687:NC.856
682:NC.855
677:NC.854
672:NC.853
667:NC.851
662:NC.850
657:NC.841
652:NC.840
647:NC.832
642:NC.702
637:NC.701
632:NC.700
627:NC.600
622:NC.530
617:NC.510
597:NC.433
592:NC.420
582:NC.223
577:NC.211
572:NC.150
567:NC.130
507:
432:Flight
245:rudder
217:camber
207:. The
201:faired
157:canopy
50:France
285:Three
283:Crew:
237:Dural
194:chord
85:1947
60:SNCAC
33:Role
505:ISBN
459:2014
383:4 hr
348:V-12
342:1 ×
243:and
190:spar
111:The
241:fin
785::
489:^
467:^
441:^
429:.
408:^
324:10
95:1
544:e
537:t
530:v
513:.
461:.
322::
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