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wing without the struts used on the AB-20 and DB-70. The undercarriage had also been cleaned up with streamlined legs and wheels in long cowlings. The nose was further complicated, retaining the upper, open gunner's position but now with double underhanging windowed positions, though the conical
162:
and undercarriage were also attached to the centre section. The generous intra-wing volume equally offered crew, fuel and bomb-room for military purposes. Initially the AB-20 was intended to have three engines like its predecessor, but during the design phase there was a military request for a
195:
ring, directly above. The nose also carried a long, conical probe with fine extensions, possibly pressure sensors. Further aft there was an enclosed pilot's cabin. A second gunner was stationed rearwards, on top of the centre section and a third fired from a
166:
Apart from the extra engines and the very different crew compartment, together with the removal of passenger accommodation, the AB-20 and DB-70 had much in common: the thick centre section and high-mounted outer wings, twin fuselages carrying a long
190:
The new central crew pod was flat-sided and tapered forwards to a complicated cylindrical nose, formed by a simple lower part with an overhanging, windowed cabin for the navigator/bombardier and an open gunner's cockpit, fitted with a
149:
airliner. The change of manufacturer's name was the result of the financial failure of Dyle et
Bacalan in 1929, followed by its immediate reappearance as SAB, who took over DB-70 development. The latter was built around a thick, wide
163:
bombardier's position and a gunner's cockpit in the nose, which required the removal of the centre engine and its replacement by two extra engines wing-mounted outboard of the centre section.
664:
721:
Borget, Michel (April 1970). "Les "Burnelli" français: progéniture du DB 70; l'AB 20 (3)" [The French "Burnelli"s: The
Offspring of the DB 70, the AB 20, Part 3].
910:
738:
Borget, Michel (May 1970). "Les "Burnelli" français: le AB 20, AB 21 et AB 22... (4)" [The French "Burnelli"s: The AB 20, AB 21 and AB 22..., Part 4].
704:
Borget, Michel (March 1970). "Les "Burnelli" français: le DB 70 et sa progeniture (2)" [The French "Burnelli"s: The DB 70 and Its
Offspring, Part 2].
133:
airliner. It featured a lifting body of thick airfoil section between the inner engines. It was later modified for the attack role; a second aircraft, the
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The first flight of the AB-20 was on 15 January 1932. The following year it was reported that it had been structurally modified for the
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airfoil centre section which provided generous internal space for passengers. The engines were mounted on this structure as were twin
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The sole prototype AB-20, with a crew of five, modified with a 75 mm gun firing sideways. Test firing took place at
287:
in
September 1934, but was terminated after five rounds had been fired due to structural damage to the lower wing skin.
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Trials of an airborne sideways-firing 75 mm gun were carried out with the AB-20 prototype modified as the
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Similar to the AB-20 and DB-70 but with cantilevered wings and powered by four 493 hp (368 kW)
247:. Firing trials were halted after damage was caused to the lower wing skin by blast from the gun muzzle.
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201 m (2,160 sq ft) including the central body area of 88 m (950 sq ft)
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151:
232:
209:
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175 km/h (109 mph, 94 kn) to 185 km/h (100 kn; 115 mph)
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to carry the tail. The outer wings were of normal thickness and chord, and the
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The SAB AB-20 was a four-engine night bomber development of the three-engine
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with pairs of mainwheels widely separated on V-struts attached to the lower
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210 km/h (110 kn; 130 mph) at 3,500 m (11,500 ft)
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205 km/h (111 kn; 127 mph) at 2,000 m (6,600 ft)
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137:, had different engines and cleaner aerodynamics but no more were built.
17:
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674:(in French). Argenteuil: SGA: 114–115. December 1932. Archived from
622:"S.A.B. AB-21 - Bombardier lourd - Un siècle d'aviation française"
600:"S.A.B. AB-20 - Bombardier lourd - Un siècle d'aviation française"
219:
218:
39:
364:
V-12 water-cooled piston engines, 370 kW (500 hp) each
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644:"S.A.B. AB-22 - Expérimental - Un siècle d'aviation française"
551:. Vol. XXV, no. 1301. 30 November 1933. p. 1202
523:. Vol. XXIV, no. 1209. 26 February 1932. p. 170
172:
579:. Vol. XXVI, no. 1316. 15 March 1934. p. 253
543:"Airisms from the Four Winds: French "attack" machines"
385:
198 km/h (123 mph, 107 kn) at sea level
259:
A four-engined bomber derived from the three-engined
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maximum load 2,500 kg (5,500 lb) of bombs
129:built in the early 1930s as a development of the
814:
263:, powered by four 493 hp (368 kW)
235:water-cooled engines and a tapered, filleted
8:
509:
507:
505:
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227:By early 1934 a much developed version, the
427:5,000 m (16,000 ft) in 40 minutes
424:4,000 m (13,000 ft) in 25 minutes
415:* 1,000 m (3,300 ft) in 5 minutes
354:1,295 kg (2,855 lb) in four tanks
821:
807:
799:
421:3,000 m (9,800 ft) in 17 minutes
418:2,000 m (6,600 ft) in 11 minutes
672:Revue de la Société Générale Aéronautique
403:1,000 km (620 mi, 540 nmi)
499:
29:
7:
433:67 kg/m (14 lb/sq ft)
231:had appeared. It had the newer V-12
740:Le Album de Fanatique de l'Aviation
723:Le Album de Fanatique de l'Aviation
706:Le Album de Fanatique de l'Aviation
324:36.7 m (120 ft 5 in)
318:21.9 m (71 ft 10 in)
571:"New Aircraft: Where is the moat?"
488:List of Interwar military aircraft
330:6.84 m (22 ft 5 in)
25:
761:
38:
642:Bruno Parmentier (1998-08-30).
620:Bruno Parmentier (1998-08-30).
598:Bruno Parmentier (1998-08-30).
458:3x 7.7 mm (0.303 in)
348:13,250 kg (29,211 lb)
906:1930s French military aircraft
342:8,450 kg (18,629 lb)
1:
921:Four-engined tractor aircraft
409:5,500 m (18,000 ft)
931:Four-engined piston aircraft
926:Aircraft first flown in 1932
27:1930s French bomber aircraft
911:Société Aérienne Bordelaise
832:Société Aérienne Bordelaise
515:"A new French Night Bomber"
181:conventional undercarriages
79:Société Aérienne Bordelaise
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774:"The Next War In The Air"
212:role and was returning to
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742:(in French) (11): 24–27.
725:(in French) (10): 24–26.
665:"Avions A.B 20 et A.B.21"
442:0.11 kW/kg (0.0672 hp/lb)
46:
37:
32:
708:(in French) (9): 24–26.
121:was a large four engine
483:List of bomber aircraft
303:General characteristics
187:of the centre section.
292:Specifications (AB-21)
224:
829:Aircraft produced by
780:photo bottom of pg 67
265:Lorraine 12Fb Courlis
261:Dyle et Bacalan DB-70
222:
169:horizontal stabilizer
147:Dyle et Bacalan DB-70
131:Dyle et Bacalan DB-70
110:Dyle et Bacalan DB-70
770:at Wikimedia Commons
681:on 27 September 2015
362:Lorraine 12Ha Pétrel
275:Lorraine 12Ha Pétrel
179:. Both aircraft had
916:Twin-boom aircraft
460:Lewis machine guns
225:
99:1 AB-20 + 1 AB-21
56:Heavy night bomber
893:
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776:Popular Mechanics
766:Media related to
413:Time to altitude:
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16:(Redirected from
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407:Service ceiling:
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89:15 January 1932
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59:Type of aircraft
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784:SAB AB-20 Video
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477:Related lists
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431:Wing loading:
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223:AB-20 in 1932
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86:First flight
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75:Manufacturer
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698:Bibliography
683:. Retrieved
676:the original
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648:. Retrieved
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626:. Retrieved
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581:. Retrieved
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214:Villacoublay
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118:
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95:Number built
850:SAB-SEMA 12
845:SAB-SEMA 10
583:11 December
555:11 December
527:11 December
376:Performance
368:Propellers:
358:Powerplant:
216:for tests.
204:Development
193:machine gun
171:, and twin
900:Categories
650:2011-01-01
628:2011-01-01
606:2011-01-01
494:References
438:Power/mass
334:Wing area:
237:cantilever
47:SAB AB-21
768:SAB AB-20
748:0757-4169
731:0757-4169
714:0757-4169
322:Wingspan:
297:Data from
280:SAB AB-22
270:SAB AB-21
256:SAB AB-20
185:longerons
156:fuselages
123:twin boom
119:SAB AB-20
18:SAB AB-22
472:See also
448:Armament
370:2-bladed
277:engines.
267:engines.
251:Variants
200:turret.
788:YouTube
685:8 April
328:Height:
316:Length:
198:ventral
177:rudders
160:cockpit
125:French
70:France
746:
729:
712:
576:Flight
548:Flight
520:Flight
465:Bombs:
401:Range:
285:Cazaux
210:attack
141:Design
127:bomber
81:(SAB)
33:AB-21
885:LH-70
880:DB-81
875:DB-80
870:AB-80
865:AB-22
860:AB-21
834:(SAB)
790:from
679:(PDF)
668:(PDF)
456:Guns:
310:Crew:
245:AB-22
229:AB-21
152:chord
135:AB-21
52:Role
855:AB-2
744:ISSN
727:ISSN
710:ISSN
687:2015
585:2022
557:2022
529:2022
360:4 ×
175:and
173:fins
117:The
786:on
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670:.
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502:^
822:e
815:t
808:v
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440::
312:5
20:)
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