260:
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224:, which was 200 lb (91 kg) lighter than the Liberty, even ignoring the weight of the Liberty's radiator and cooling water. The fuselage was redesigned to make more extensive use of welded steel tubing, and an enclosed cabin was fitted between the mail compartments, allowing two passengers to be carried as well as 1,200 lb (540 kg) of mail. Boeing's bid of $ 3 per lb was much less than any of the competing bids, and Boeing was awarded the
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As of
February 17, 2008, Boeing 40C c/n 1043 became the only airworthy example in the world. It also holds the title of the oldest flying Boeing in the world. In 1928, the aircraft was substantially damaged in a crash near Canyonville, OR. After being recovered, it was completely rebuilt over an
212:
of the Post Office's Air Mail routes. In late 1926, bids were requested for the main transcontinental trunk mail route, which was to be split into eastern and western sections, with Boeing bidding for the western section. Boeing revived the design for the tender, with the
185:
and laminated wood covering. Up to 1,000 lb (450 kg) of mail was carried in two compartments in the forward fuselage, while the single pilot sat in an open cockpit in the rear fuselage. The wings and tail were of wooden construction, and the Model 40 had a fixed
297:
Revised 1927 design for BATC. the aircraft was powered by a Pratt & Whitney Wasp radial engine, plus seating for two passengers in an enclosed cabin; 25 built. Received Dept of Air
Commerce Approved Type Certificate
651:
November 23, 1931: A Boeing Air
Transport Model 40, registration NC7465, crashed eight miles west of Salt Lake Airport, killing the pilot; it was believed that the plane overturned while attempting to land at
672:
May 16, 1932: A Pacific Air
Transport Model 40, registration NC5589, crashed and burned in fog while attempting to land at Burbank Airport, killing all three (both pilots, radioman) on board.
239:, with an enlarged cabin allowing four passengers to be carried. Meanwhile, Boeing Air Transport's Model 40As were modified by replacing their Wasp engines with 525 hp (391 kW)
631:
November 18, 1930: A Pacific Air
Transport Model 40B-4 (c/n 1036, registration NC5340) crashed into a mountainside at 4500 feet in a snowstorm, killing all three on board.
440:
628:
October 2, 1928: A Pacific Air
Transport Model 40C (c/n 1043, registration NC5339) crashed on Canyon Mountain near Canyonville, Oregon, killing one of two on board.
263:
Cover flown from San
Francisco to Chicago by a Model 40A operated by Boeing Air Transport on the first day US Transcontinental Air Mail under Contract. July 1, 1927
1446:
181:, with the required Liberty engine housed in a streamlined cowling with an underslung radiator. The aircraft's fuselage had a steel tube structure, with an
251:
was a new-build aircraft combining the four-passenger cabin of the Model 40C with the Hornet engine of the B-2. Production continued until
February 1932.
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Revised Model 40B with seating for four passengers and other improvements. Equipped with openable windows, plus seating for four passengers; 38 built.
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The Model 40 made its first flight on July 7, 1925. Although the prototype was purchased by the US Post Office, the production order went to the
3779:
3789:
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January 22, 1931: A Varney Air Lines Model 40B-4 (c/n 1148, registration NC741K) crashed into Bluff
Mountain in dense fog, killing the pilot.
675:
December 14, 1932: A Boeing Air
Transport Model 40B-4 (c/n 1168, registration NC842M) crashed at Rocky Ridge, Colorado, killing the pilot.
232:
contract in January 1927, building 24 Model 40As for the route (with a further aircraft being used as a testbed by Pratt & Whitney).
625:
April 17, 1928: A Boeing Air Transport Model 40B (c/n 893, registration NC282) crashed at Federal, Wyoming, killing one of two on board.
132:
that was widely used for airmail services in the United States in the 1920s and 1930s, especially by airlines that later became part of
348:
Similar to Model 40B-4 but with Pratt & Whitney Wasp engine of Model 40A. (ten built, all later converted to Model 40B-4 standard).
1439:
881:
931:
831:
1047:
354:
Unique special-order machine similar to Model 40C with only two-passenger cabin and extra open cockpit forward of pilot's cockpit.
259:
816:
204:
Model 40C at Oshkosh 2008. Both passenger entry doors, one for each of the two-seat rows, are on the left side of the fuselage.
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May 3, 1932: A Varney Air Lines Model 40B-4 (c/n 1155, registration NC830M) crashed at Portland, Oregon, killing both crew.
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after the aircraft struck trees when flying low to avoid air turbulence; the passenger was killed, but the pilot survived.
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May 5, 1931: A Pacific Air Transport Model 40B-4 (c/n 1044, registration NC5390) crashed in La Tuna Canyon in the
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Davies, Ed (January–February 2007). "Boeing's Airline: The Life and Times of Boeing Air Transport: Part One".
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as used by the DH-4, of which large stocks of war-built engines were available. The resultant aircraft, the
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has a complete full-scale replica and two partially finished replica fuselages (showing what the original
61:
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Davies, Ed (March–April 2007). "Boeing's Airline: The Life and Times of Boeing Air Transport: Part Two".
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September 16, 1931: A Pacific Air Transport Model 40B-4 (c/n 1428, registration NC10347) crashed into
435:. On May 8, 2010, this airplane had an aerial rendezvous with Boeing's newest passenger aircraft, the
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November 26, 1931: A Varney Air Lines Model 40B-4 (c/n 1419, registration NC10338) crashed near
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February 26, 1928: A Boeing Air Transport Model 40B (c/n 891, registration NC280) crashed near
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February 2, 1932: A Boeing Air Transport Model 40, registration NC7470, crashed on landing at
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447:
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Unique special-order machine similar to Model 40X, but with Pratt & Whitney Hornet engine.
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2007:
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Model 40C front seat of rear passenger cabin showing the fold-down writing desk/table
400:
335:
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221:
209:
666:; the plane struck an irrigation ditch and caught fire, killing one of two on board.
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2012:
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while attempting to land at Burbank Airport in low visibility, killing both crew.
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has a 1928 Boeing Model 40-B on display in its Transportation Gallery. (N288)
436:
167:
164:
157:
125:
54:
1003:
986:
969:
952:
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in Hood River, Oregon. It remains airworthy and flies on special occasions.
3645:
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1872:
1787:
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1119:
153:
496:
271:, commenced operations on the San Francisco–Chicago route on July 1, 1927.
492:
Model 40C Pilot's panel with some modern features added for safe operation
428:
378:
217:
replacing the Liberty engine with a 425 hp (317 kW) air-cooled
182:
17:
1048:
Prelude to AirVenture appearance, 7 minute video, accessed 8 August 2008
418:
229:
200:
178:
129:
1455:
477:
137:
994:
Taylor, H. A. (August–November 1983). "When Boeing Flew The Mails".
977:
Hagedorn, Daniel P. (July–November 1986). "From Caudillos to COIN".
283:
A Boeing Model 40 flying over mountains in Washington State, 1930s.
38:
860:
495:
487:
417:
278:
199:
308:
radial piston engine. 19 Model 40A were converted. Redesignated
1428:
1066:
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in low visibility while attempting to land, killing the pilot.
648:
after takeoff for reasons unknown, killing all four on board.
1053:
Pemberton-Tobin-Scott transcontinental air mail re-enactment
427:
eight-year period from 2000 to 2008 and an estimated 18,000
160:
then in use. The new aircraft was required to use the same
480:
factory would have looked like circa 1928-29) on display.
304:
Model 40As re-engined with a 525 hp (391 kW)
1042:
Boeing History – Boeing Model 40A Commercial Transport
802:
Gann (April 1973). "The Golden Age of Air Transport".
208:
The Contract Air Mail Act of 1925 set out the gradual
926:(Third ed.). London: Putnam Aeronautical Books.
1030:. London: Bright Star Publishing. File 890 Sheet 52.
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two passengers and 1,200 lb (540 kg) mail
439:Dreamliner. In September, 2017, it was sold to the
110:
102:
97:
89:
70:
60:
50:
45:
31:
879:Boeing on 787 aerial rendezvous with 1928 Model 40
441:Western Antique Aeroplane & Automobile Museum
817:Boeing 40C Flies For the First Time in 80 Years
569:1 Ă— Pratt & Whitney Wasp , 420 hp (313 kW)
1440:
1078:
8:
454:, contains a 1927 Boeing 40B-2, number 285.
136:. It became the first aircraft built by the
693:
691:
689:
235:The next model to reach production was the
1447:
1433:
1425:
1104:
1085:
1071:
1063:
718:
716:
28:
596:650 mi (1,046 km, 565 nmi)
584:128 mph (206 km/h, 111 kn)
291:Original 1925 design with Liberty engine.
590:105 mph (169 km/h, 91 kn)
324:One Model 40B used as engine testbed by
258:
1022:. London: Studio Editions. p. 170.
998:. No. Twenty–two. pp. 64–74.
981:. No. Thirty–one. pp. 55–70.
685:
539:44 ft 2.25 in (13.47 m)
533:33 ft 2.25 in (10.12 m)
128:of the 1920s. It was a single-engined
7:
545:12 ft 3.1 in (3.74 m)
1094:Boeing airliners and civil aircraft
1058:Pemberton and Sons Aviation Website
551:547 sq ft (50.82 m)
431:by Pemberton and Sons Aviation in
25:
792:January/February 2007, pp. 68–69.
748:January/February 2007, pp. 66–67.
1028:World Aircraft Information Files
964:. No. 128. pp. 62–73.
947:. No. 127. pp. 64–74.
422:Boeing Model 40C at Oshkosh 2008
393:
371:
338:. Two aircraft were exported to
37:
3785:Single-engined tractor aircraft
1020:Jane's Encyclopedia of Aviation
3770:1920s United States mailplanes
1018:Taylor, Michael J. H. (1989).
608:770 ft/min (3.9 m/s)
459:Museum of Science and Industry
1:
3780:1920s United States airliners
910:January/February 2007, p. 69.
861:Pemberton & Sons Aviation
819:VintageAircraft, 2008 - 02/21
701:January/February 2007, p. 65.
602:14,500 ft (4,420 m)
563:6,000 lb (2,727 kg)
557:3,531 lb (1,605 kg)
243:radial engines to become the
140:company to carry passengers.
3790:Aircraft first flown in 1925
761:August–November 1983, p. 69.
726:August–November 1983, p. 67.
334:Four Model 40B-4s built by
156:to replace the ex-military
152:issued a requirement for a
3806:
924:Boeing Aircraft since 1916
851:July–November 1986, p. 60.
507:Boeing Aircraft since 1916
484:Specifications (Model 40A)
306:Pratt & Whitney Hornet
241:Pratt & Whitney Hornet
884:February 2, 2011, at the
735:Bowers 1989, pp. 116–117.
710:Bowers 1989, pp. 124–125.
188:conventional landing gear
36:
1044:Retrieved June 17, 2006.
219:Pratt & Whitney Wasp
829:Lee Bottom Flying Field
613:Accidents and incidents
512:General characteristics
1458:aircraft model numbers
501:
493:
423:
284:
264:
205:
144:Development and design
3744:Boeing Customer Codes
664:Rio Vista, California
499:
491:
421:
282:
262:
203:
174:, was a conventional
83:Pacific Air Transport
1296:New Midsize Airplane
897:Bowers 1989, p. 127.
834:May 9, 2008, at the
779:Bowers 1989, p. 130.
770:Bowers 1989, p. 129.
408:Boeing Air Transport
269:Boeing Air Transport
75:Boeing Air Transport
1254:Boeing Business Jet
620:Marquette, Nebraska
561:Max takeoff weight:
474:Seattle, Washington
433:Spokane, Washington
326:Pratt & Whitney
255:Operational history
124:is a United States
46:General information
1322:New Large Airplane
866:2016-01-10 at the
502:
494:
452:Dearborn, Michigan
424:
414:Surviving aircraft
386:Honduran Air Force
285:
267:Boeing's airline,
265:
206:
3752:
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1422:
1421:
1335:
1334:
1145:377 Stratocruiser
657:Pasco, Washington
646:San Francisco Bay
639:Verdugo Mountains
463:Chicago, Illinois
448:Henry Ford Museum
118:
117:
103:Introduction date
16:(Redirected from
3797:
3501:-100/146/148/166
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1442:
1435:
1426:
1342:utility aircraft
1340:Civil trainers/
1105:
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920:Bowers, Peter M.
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600:Service ceiling:
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470:Museum of Flight
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79:Varney Air Lines
41:
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3538:Next Generation
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1135:307 Stratoliner
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1012:Further reading
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888:. Seattlepi.com
886:Wayback Machine
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868:Wayback Machine
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836:Wayback Machine
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804:Flying Magazine
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172:Boeing Model 40
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134:United Airlines
122:Boeing Model 40
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1016:
1015:
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980:
975:
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939:
935:
933:0-85177-804-6
929:
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747:
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621:
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607:
604:
601:
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595:
592:
589:
588:Cruise speed:
586:
583:
580:
579:
578:
576:
568:
565:
562:
559:
556:
555:Empty weight:
553:
550:
547:
544:
541:
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535:
532:
529:
526:
523:
520:
517:
516:
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401:United States
391:
390:
387:
384:
383:
380:
369:
368:
364:
359:
356:
353:
350:
347:
344:
341:
337:
336:Boeing Canada
333:
330:
327:
323:
320:
317:
314:
311:
307:
303:
300:
296:
293:
290:
287:
286:
281:
274:
272:
270:
261:
254:
252:
250:
246:
242:
238:
233:
231:
227:
226:San Francisco
223:
222:radial engine
220:
216:
211:
210:privatization
202:
198:
196:
191:
189:
184:
180:
177:
173:
169:
166:
163:
159:
155:
151:
148:In 1925, the
143:
141:
139:
135:
131:
127:
123:
114:July 20, 1925
113:
109:
105:
101:
96:
92:
88:
84:
80:
76:
73:
71:Primary users
69:
65:
63:
59:
56:
53:
49:
44:
40:
35:
30:
27:
19:
1672:
1414:221 Monomail
1394:200 Monomail
1373:
1125:221 Monomail
1114:
1027:
1019:
995:
978:
961:
942:
923:
907:
902:
893:
874:
856:
848:
843:
838:This Just In
824:
812:
803:
797:
789:
784:
775:
766:
758:
753:
745:
740:
731:
723:
706:
698:
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599:
593:
587:
581:
574:
572:
566:
560:
554:
548:
542:
536:
530:
524:
518:
511:
509:
504:
503:
467:
456:
445:
425:
321:Model 40B-4A
309:
268:
266:
248:
244:
236:
234:
214:
207:
192:
171:
162:water-cooled
147:
121:
119:
111:First flight
106:July 1, 1927
90:Number built
62:Manufacturer
26:
1222:Dreamlifter
1190:737 Classic
1154:Jet-engined
1140:314 Clipper
575:Performance
567:Powerplant:
340:New Zealand
331:Model 40H-4
315:Model 40B-4
310:Model 40B-2
249:Model 40B-4
245:Model 40B-2
195:Douglas M-2
3759:Categories
2683:345-2/4/31
680:References
549:Wing area:
437:Boeing 787
168:V12 engine
126:mail plane
55:Mail plane
1409:213 Totem
1101:Airliners
1004:0143-5450
987:0143-5450
970:0143-5450
953:0143-5450
847:Hagedorn
537:Wingspan:
525:Capacity:
505:Data from
429:man hours
365:Operators
357:Model 40Y
351:Model 40X
345:Model 40C
301:Model 40B
294:Model 40A
237:Model 40C
215:Model 40A
154:mailplane
18:Boeing 40
3765:Biplanes
3675:Missiles
3508:717 (II)
1464:Aircraft
1279:Proposed
922:(1989).
882:Archived
864:Archived
832:Archived
379:Honduras
288:Model 40
275:Variants
183:aluminum
32:Model 40
3721:Vessels
3533:Classic
3496:717 (I)
1217:747-400
1200:737 MAX
906:Davies
788:Davies
757:Taylor
744:Davies
722:Taylor
697:Davies
543:Height:
531:Length:
230:Chicago
179:biplane
176:tractor
165:Liberty
130:biplane
98:History
3437:853-21
2797:367-80
1456:Boeing
1195:737 NG
1161:367-80
1002:
985:
968:
951:
930:
652:night.
594:Range:
478:Boeing
398:
376:
247:. The
138:Boeing
93:ca. 80
66:Boeing
3737:Other
3582:-4G4F
3572:-2G4B
3548:-800A
3543:-700W
1227:747-8
1212:747SP
806:: 34.
519:Crew:
158:DH-4s
3630:2707
3601:-2G4
3577:-400
3528:-253
3489:-020
3477:2020
3472:2000
3467:1080
3462:1074
3457:1046
3452:1044
3447:1041
1501:6D/E
1312:2707
1270:777X
1000:ISSN
983:ISSN
966:ISSN
949:ISSN
928:ISBN
468:The
457:The
446:The
120:The
51:Type
3728:929
3712:641
3707:631
3702:624
3697:621
3692:602
3687:601
3682:600
3666:550
3661:520
3656:502
3651:500
3625:787
3613:777
3608:767
3596:757
3562:747
3555:MAX
3523:737
3518:727
3513:720
3484:707
3442:953
3432:844
3427:831
3422:820
3417:818
3412:815
3407:814
3402:739
3397:733
3392:701
3387:498
3382:497
3377:495
3372:493
3367:490
3362:486
3357:485
3352:484
3347:483
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3317:474
3312:473
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2872:383
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2807:369
2802:368
2790:-76
2785:367
2780:366
2775:365
2770:364
2765:363
2760:362
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2735:356
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2725:354
2720:353
2715:352
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2700:349
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2663:342
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2413:288
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2213:247
2208:246
2203:245
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2143:233
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2038:210
2033:209
2028:208
2023:207
2018:206
2013:205
2008:204
2003:203
1998:202
1993:201
1988:200
1983:102
1978:101
1973:100
1404:204
1399:203
1349:B-1
1317:7J7
1249:787
1244:777
1239:767
1234:757
1207:747
1185:737
1180:727
1175:717
1170:720
1166:707
1130:247
521:one
472:in
461:in
450:in
298:#2.
228:to
3761::
3646:8C
3589:-8
3567:SP
1968:99
1963:98
1958:97
1953:96
1948:95
1943:94
1938:93
1933:92
1928:91
1923:90
1918:89
1913:88
1908:87
1903:86
1898:85
1893:84
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1543:14
1538:13
1533:12
1528:11
1523:10
1389:95
1384:81
1379:64
1374:40
1359:6D
1291:Y3
1286:Y1
1120:80
1115:40
715:^
688:^
197:.
190:.
3618:X
1518:9
1513:8
1508:7
1496:6
1491:5
1486:4
1481:3
1476:2
1471:1
1448:e
1441:t
1434:v
1369:8
1364:7
1354:6
1168:/
1086:e
1079:t
1072:v
1006:.
989:.
972:.
955:.
936:.
342:.
328:.
312:.
20:)
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