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During assembly, the second prototype XO-27 was converted to a bomber prototype, dubbed the XB-8. While the XB-8 was much faster than existing biplane bombers, it did not have the bomb capacity to be considered for production. Two YB-8s and 4 Y1B-8s were ordered, but these were changed mid-production
172:/XO-36. Both promised to greatly exceed the performance of the large biplane bombers then used by the Army Air Corps. However, the Douglas XB-7 was markedly better in performance than the XB-8, and no further versions of Fokker's aircraft were built.
155:
The wing of the XB-8 and XO-27 was built entirely from wood, although the fuselage was constructed of steel tubes covered with fabric with the exception of the nose which had a corrugated metal. They featured the first retractable
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ever fitted to an Army Air Corps bomber or observation craft. The undercarriage retracted electrically. The crew was three in tandem position.
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27:
Dutch bomber prototype for the United States Army Air Corps
405:, No. 117, May/June 2005, pp. 62–66. ISSN 0143-5450.
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Aircraft of comparable role, configuration, and era
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389:. Vol. XXVI, no. 1339. pp. 862–865
113:20 October 1930 as XO-27, February 1931 as XB-8
324:List of military aircraft of the United States
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466:
8:
100:7 (1 XB-8 + 2 YB-8 + 4 Y1B-8), all as Y1O-27
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131:in the 1930s, derived from the high-speed
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291:160 mph (260 km/h, 140 kn)
1996:bomber designations, Army/Air Force and
401:Pelletier, Alain J. "Fokker Twilight".
340:
436:Army's Mystery Plane Passes Speed Test
447:– National Museum of the US Air Force
7:
3169:Twin piston-engined tractor aircraft
3159:1930s United States bomber aircraft
238:64 ft 4 in (19.60 m)
232:47 ft 4 in (14.42 m)
379:Cellier, Alfred (23 August 1934).
244:11 ft 6 in (3.50 m)
25:
250:619 sq ft (57.5 m)
1683:(Fokker America/Atlantic-Fokker)
182:
38:
431:O-27 USAAS 1000 Aircraft Photos
381:"American Military Monoplanes"
262:10,650 lb (4,824 kg)
1:
412:. New York: Doubleday, 1982.
256:6,861 lb (3,112 kg)
70:General Aviation Corporation.
197:United States Army Air Corps
129:United States Army Air Corps
91:United States Army Air Corps
2639:Fighter-bomber, in F-series
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152:to Y1O-27 configuration.
37:
168:It competed against the
319:List of bomber aircraft
276:, 600 hp (450 kW) each
217:General characteristics
445:Atlantic (Fokker) XB-8
410:American Combat Planes
365:Pelletier 2005, p. 64.
356:23 August 1934, p. 864
148:
139:Design and development
135:observation aircraft.
2618:Redesignated A-series
1741:military designations
841:military designations
203:Specifications (XB-8)
146:
3105:Related designations
3062:Tri-Service sequence
2734:USAAC/USAAF sequence
2714:observation aircraft
2588:Tri-Service sequence
1036:Company designations
490:Company designations
1049:style designations:
164:Operational history
50:General information
2006:Original sequences
211:Fokker's Twilight.
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289:Maximum speed:
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44:XB-8 prototype
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3024:
3021:
3019:
3016:
3014:
3011:
3009:
3006:
3004:
3001:
2999:
2996:
2994:
2991:
2989:
2986:
2984:
2981:
2979:
2976:
2974:
2971:
2969:
2966:
2964:
2961:
2959:
2956:
2954:
2951:
2949:
2946:
2944:
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2939:
2936:
2934:
2931:
2929:
2926:
2924:
2921:
2919:
2916:
2914:
2911:
2909:
2906:
2904:
2901:
2899:
2896:
2894:
2891:
2889:
2886:
2884:
2881:
2879:
2876:
2874:
2871:
2869:
2866:
2864:
2861:
2859:
2856:
2854:
2851:
2849:
2846:
2844:
2841:
2839:
2836:
2834:
2831:
2829:
2826:
2824:
2821:
2819:
2816:
2814:
2811:
2809:
2806:
2804:
2801:
2799:
2796:
2794:
2791:
2789:
2786:
2784:
2781:
2779:
2776:
2774:
2771:
2769:
2766:
2764:
2761:
2759:
2756:
2754:
2751:
2749:
2746:
2744:
2741:
2740:
2738:
2732:
2727:
2723:
2719:
2715:
2707:
2702:
2700:
2695:
2693:
2688:
2687:
2684:
2668:
2665:
2664:
2662:
2658:
2652:
2649:
2647:
2644:
2643:
2641:
2637:
2631:
2628:
2626:
2623:
2622:
2620:
2616:
2613:
2609:
2603:
2600:
2598:
2595:
2594:
2592:
2586:
2580:
2577:
2575:
2572:
2570:
2567:
2566:
2564:
2558:
2552:
2549:
2547:
2544:
2542:
2539:
2537:
2534:
2532:
2529:
2527:
2524:
2522:
2519:
2517:
2514:
2512:
2509:
2507:
2504:
2502:
2499:
2497:
2494:
2492:
2489:
2487:
2484:
2480:
2477:
2475:
2472:
2471:
2470:
2467:
2465:
2462:
2460:
2457:
2455:
2452:
2450:
2447:
2445:
2442:
2440:
2437:
2433:
2430:
2429:
2428:
2425:
2423:
2420:
2418:
2415:
2411:
2408:
2407:
2406:
2403:
2401:
2398:
2396:
2393:
2391:
2388:
2386:
2383:
2381:
2378:
2376:
2373:
2371:
2368:
2366:
2363:
2361:
2358:
2356:
2353:
2349:
2346:
2344:
2341:
2340:
2339:
2336:
2334:
2331:
2329:
2326:
2324:
2321:
2319:
2316:
2314:
2311:
2309:
2306:
2302:
2299:
2298:
2297:
2294:
2292:
2289:
2287:
2284:
2282:
2279:
2277:
2274:
2272:
2269:
2267:
2264:
2262:
2259:
2257:
2254:
2252:
2249:
2247:
2244:
2242:
2239:
2237:
2234:
2232:
2229:
2227:
2224:
2222:
2219:
2217:
2214:
2212:
2209:
2207:
2204:
2202:
2199:
2197:
2194:
2192:
2189:
2187:
2184:
2182:
2179:
2177:
2174:
2172:
2169:
2167:
2164:
2162:
2159:
2157:
2154:
2153:
2151:
2147:Main sequence
2145:
2135:
2132:
2130:
2127:
2125:
2122:
2121:
2119:
2115:
2109:
2106:
2104:
2101:
2100:
2098:
2096:Medium bomber
2094:
2088:
2085:
2083:
2080:
2078:
2075:
2073:
2070:
2068:
2065:
2063:
2060:
2058:
2055:
2053:
2050:
2048:
2045:
2043:
2040:
2038:
2035:
2033:
2030:
2028:
2025:
2023:
2020:
2019:
2017:
2013:
2010:
2004:
1999:
1995:
1991:
1987:
1983:
1976:
1971:
1969:
1964:
1962:
1957:
1956:
1953:
1937:
1934:
1933:
1931:
1927:
1921:
1918:
1917:
1915:
1911:
1905:
1902:
1900:
1897:
1895:
1892:
1891:
1889:
1885:
1879:
1876:
1875:
1873:
1869:
1863:
1860:
1858:
1855:
1853:
1850:
1848:
1845:
1843:
1840:
1839:
1837:
1833:
1827:
1824:
1822:
1819:
1817:
1814:
1812:
1809:
1807:
1804:
1802:
1799:
1797:
1794:
1792:
1789:
1787:
1784:
1782:
1779:
1778:
1776:
1772:
1766:
1763:
1761:
1758:
1756:
1753:
1752:
1750:
1746:
1743:
1739:United States
1737:
1731:
1728:
1726:
1723:
1721:
1718:
1716:
1713:
1711:
1708:
1706:
1703:
1701:
1698:
1696:
1693:
1691:
1688:
1687:
1685:
1681:
1677:
1667:
1664:
1662:
1659:
1657:
1654:
1652:
1649:
1647:
1644:
1642:
1639:
1637:
1634:
1632:
1629:
1627:
1624:
1622:
1619:
1618:
1616:
1610:
1600:
1597:
1595:
1592:
1590:
1587:
1585:
1582:
1580:
1577:
1575:
1572:
1570:
1567:
1565:
1562:
1560:
1557:
1556:
1553:
1547:
1544:
1542:
1539:
1537:
1534:
1532:
1529:
1527:
1524:
1522:
1519:
1517:
1514:
1512:
1509:
1507:
1504:
1502:
1499:
1497:
1494:
1492:
1489:
1487:
1484:
1482:
1479:
1477:
1474:
1472:
1469:
1468:
1465:
1459:
1456:
1454:
1451:
1449:
1446:
1445:
1442:
1436:
1433:
1431:
1428:
1426:
1423:
1421:
1418:
1417:
1414:
1408:
1405:
1403:
1400:
1398:
1395:
1393:
1390:
1388:
1385:
1383:
1380:
1378:
1375:
1373:
1370:
1368:
1365:
1363:
1360:
1358:
1355:
1353:
1350:
1348:
1345:
1343:
1340:
1338:
1335:
1333:
1330:
1328:
1325:
1323:
1320:
1318:
1315:
1313:
1310:
1308:
1305:
1303:
1300:
1298:
1295:
1293:
1290:
1288:
1285:
1283:
1280:
1278:
1275:
1273:
1270:
1269:
1266:
1260:
1257:
1255:
1252:
1251:
1248:
1242:
1239:
1237:
1234:
1232:
1229:
1227:
1224:
1222:
1219:
1217:
1214:
1212:
1209:
1207:
1204:
1202:
1199:
1197:
1194:
1192:
1189:
1187:
1184:
1182:
1179:
1177:
1174:
1172:
1169:
1167:
1164:
1163:
1160:
1154:
1151:
1149:
1146:
1144:
1141:
1139:
1136:
1134:
1131:
1129:
1126:
1124:
1121:
1119:
1116:
1114:
1111:
1109:
1106:
1104:
1101:
1099:
1096:
1095:
1092:
1086:
1083:
1081:
1078:
1076:
1073:
1071:
1068:
1066:
1063:
1061:
1058:
1057:
1054:
1051:
1043:
1040:
1034:
1024:
1021:
1020:
1017:
1011:
1008:
1007:
1004:
998:
995:
993:
990:
988:
985:
983:
980:
978:
975:
974:
971:
965:
962:
961:
958:
952:
949:
947:
944:
942:
939:
937:
934:
932:
929:
927:
924:
922:
919:
917:
914:
913:
910:
904:
901:
900:
897:
891:
888:
886:
883:
881:
878:
877:
874:
871:
865:
859:
856:
854:
851:
849:
846:
845:
843:
837:
827:
824:
822:
819:
817:
814:
812:
809:
807:
804:
802:
799:
797:
794:
792:
789:
787:
784:
782:
779:
777:
774:
772:
769:
767:
764:
762:
759:
757:
754:
752:
749:
747:
744:
742:
739:
737:
734:
732:
729:
727:
724:
722:
719:
717:
714:
712:
709:
707:
704:
702:
699:
697:
694:
692:
689:
687:
684:
682:
679:
677:
674:
672:
669:
667:
664:
662:
659:
657:
654:
652:
649:
647:
644:
642:
639:
637:
634:
632:
629:
627:
624:
622:
619:
617:
614:
612:
609:
607:
604:
602:
599:
598:
595:
589:
586:
584:
581:
579:
576:
574:
571:
569:
566:
564:
561:
559:
556:
554:
551:
549:
546:
544:
541:
539:
536:
534:
531:
529:
526:
524:
521:
519:
516:
514:
511:
509:
506:
504:
501:
500:
497:
494:
488:
483:
476:
471:
469:
464:
462:
457:
456:
453:
446:
443:
441:
437:
434:
432:
429:
428:
424:
419:
418:0-930083-17-2
415:
411:
408:Wagner, Ray.
407:
404:
400:
388:
387:
382:
377:
376:
372:
362:
359:
355:
349:
347:
345:
341:
334:
329:
325:
322:
320:
317:
316:
315:
314:
313:Related lists
308:
307:Douglas Y1B-7
305:
304:
303:
302:
295:
290:
287:
286:
285:
283:
275:
271:
267:
264:
261:
260:Gross weight:
258:
255:
254:Empty weight:
252:
249:
246:
243:
240:
237:
234:
231:
228:
225:
222:
221:
220:
218:
213:
212:
209:
202:
198:
195:
194:
191:
190:United States
180:
179:
175:
173:
171:
170:Douglas Y1B-7
163:
161:
159:
153:
145:
138:
136:
134:
130:
126:
122:
112:
108:
103:
99:
95:
92:
89:
85:
81:
77:
73:
69:
67:
63:
60:
57:
53:
48:
41:
36:
31:
19:
2872:
2190:
2117:Heavy bomber
2015:Light bomber
1851:
1764:
1748:Observation:
869:designations
439:
409:
402:
391:. Retrieved
384:
373:Bibliography
361:
353:
312:
311:
300:
299:
288:
281:
279:
265:
259:
253:
247:
241:
235:
229:
223:
216:
214:
210:
207:
206:
167:
158:landing gear
154:
150:
132:
120:
118:
110:First flight
97:Number built
87:Primary user
66:Manufacturer
3136:Unconfirmed
2736:(1924–1942)
2726:Tri-Service
2562:(1935–1936)
2149:(1930–1962)
2008:(1924–1930)
1998:Tri-Service
1774:Transports:
282:Performance
274:V12 engines
266:Powerplant:
147:Fokker O-27
133:Fokker O-27
121:Fokker XB-8
18:Fokker O-27
3148:Categories
1913:Ambulance:
1045:continuing
330:References
248:Wing area:
1887:Fighters:
1725:Universal
1038:post-1918
393:9 January
236:Wingspan:
208:Data from
176:Operators
1929:Trainer:
1835:Bombers:
1614:seating:
1612:based on
492:pre-1918
484:aircraft
352:Cellier
296:See also
75:Designer
2728:systems
2000:systems
1871:Attack:
1631:F.XXXVI
1377:F.XXIII
1357:F.XVIII
1211:D.XVIII
242:Height:
230:Length:
105:History
2651:FB-111
2479:RB-57F
2474:RB-57D
2348:NB-36H
1626:F.XXIV
1621:F.XXII
1589:T.VIII
1506:S.VIII
1430:FG.III
1352:F.XVII
1332:F.XIII
1307:F.VIII
1206:D.XVII
1186:D.XIII
1128:C.VIII
951:D.VIII
482:Fokker
416:
386:Flight
354:Flight
187:
125:bomber
123:was a
80:Fokker
59:Bomber
3122:OV-12
3117:OV-10
2722:USAAF
2718:USAAC
2660:Other
2646:FB-22
2579:BLR-3
2574:BLR-2
2569:BLR-1
2432:B-50C
2410:B-47C
2343:B-36G
2301:B-29D
2087:LB-14
2082:LB-13
2077:LB-12
2072:LB-11
2067:LB-10
1990:USAAF
1986:USAAC
1982:USAAS
1847:XLB-2
1842:XHB-2
1765:XO-27
1710:AF-15
1584:T.VII
1564:T.III
1501:S.VII
1481:S.III
1458:G.III
1435:FG.IV
1425:FG.II
1372:F.XXI
1362:F.XIX
1347:F.XVI
1337:F.XIV
1327:F.XII
1302:F.VII
1282:F.III
1259:DC.II
1226:D.XXI
1216:D.XIX
1201:D.XVI
1191:D.XIV
1181:D.XII
1148:C.XIV
1123:C.VII
1103:C.III
1070:B.III
987:E.III
946:D.VII
926:D.III
890:A.III
858:B.III
335:Notes
224:Crew:
3112:OV-1
3053:O-63
3048:O-62
3043:O-61
3038:O-60
3033:O-59
3028:O-58
3023:O-57
3018:O-56
3013:O-55
3008:O-54
3003:O-53
2998:O-52
2993:O-51
2988:O-50
2983:O-49
2978:O-48
2973:O-47
2968:O-46
2963:O-45
2958:O-44
2953:O-43
2948:O-42
2943:O-41
2938:O-40
2933:O-39
2928:O-38
2923:O-37
2918:O-36
2913:O-35
2908:O-34
2903:O-33
2898:O-32
2893:O-31
2888:O-30
2883:O-29
2878:O-28
2873:O-27
2868:O-26
2863:O-25
2858:O-24
2853:O-23
2848:O-22
2843:O-21
2838:O-20
2833:O-19
2828:O-18
2823:O-17
2818:O-16
2813:O-15
2808:O-14
2803:O-13
2798:O-12
2793:O-11
2788:O-10
2724:and
2667:B-21
2630:B-26
2625:B-20
2551:B-71
2546:B-70
2541:B-69
2536:B-68
2531:B-67
2526:B-66
2521:B-65
2516:B-64
2511:B-63
2506:B-62
2501:B-61
2496:B-60
2491:B-59
2486:B-58
2469:B-57
2464:B-56
2459:B-55
2454:B-54
2449:B-53
2444:B-52
2439:B-51
2427:B-50
2422:B-49
2417:B-48
2405:B-47
2400:B-46
2395:B-45
2390:B-44
2385:B-43
2380:B-42
2375:B-41
2370:B-40
2365:B-39
2360:B-38
2355:B-37
2338:B-36
2333:B-35
2328:B-34
2323:B-33
2318:B-32
2313:B-31
2308:B-30
2296:B-29
2291:B-28
2286:B-27
2281:B-26
2276:B-25
2271:B-24
2266:B-23
2261:B-22
2256:B-21
2251:B-20
2246:B-19
2241:B-18
2236:B-17
2231:B-16
2226:B-15
2221:B-14
2216:B-13
2211:B-12
2206:B-11
2201:B-10
2134:HB-3
2129:HB-2
2124:HB-1
2062:LB-9
2057:LB-8
2052:LB-7
2047:LB-6
2042:LB-5
2037:LB-4
2032:LB-3
2027:LB-2
2022:LB-1
1994:USAF
1936:TW-4
1904:PW-7
1899:PW-6
1894:PW-5
1878:XA-7
1862:FT-2
1857:FT-1
1852:XB-8
1821:C-31
1816:C-20
1811:C-16
1806:C-15
1801:C-14
1760:CO-4
1755:AO-1
1720:F-32
1715:F-18
1705:F-14
1700:F-11
1695:F-10
1646:F.56
1636:F.40
1599:T.10
1594:T.IX
1579:T.VI
1569:T.IV
1559:T.II
1546:S.16
1541:S.15
1536:S.14
1531:S.13
1526:S.12
1521:S.11
1511:S.IX
1496:S.VI
1486:S.IV
1476:S.II
1453:G.II
1420:FG.I
1407:F.37
1402:F.29
1382:F.25
1367:F.XX
1342:F.XV
1322:F.XI
1312:F.IX
1297:F.VI
1287:F.IV
1277:F.II
1254:DC.I
1241:D.24
1236:D.23
1231:D.22
1221:D.XX
1196:D.XV
1176:D.XI
1166:D.IX
1153:C.XV
1143:C.XI
1133:C.IX
1118:C.VI
1108:C.IV
1098:C.II
1085:B.VI
1075:B.IV
1065:B.II
992:E.IV
982:E.II
964:Dr.I
941:D.VI
931:D.IV
921:D.II
885:A.II
853:B.II
806:V.45
801:V.44
796:V.43
791:V.42
786:V.41
781:V.40
776:V.39
771:V.38
766:V.37
761:V.36
756:V.35
751:V.34
746:V.33
741:V.31
736:V.30
731:V.29
726:V.28
721:V.27
716:V.26
711:V.25
706:V.24
701:V.23
696:V.22
691:V.21
686:V.20
681:V.18
676:V.17
671:V.16
666:V.14
661:V.13
656:V.12
651:V.11
646:V.10
588:M.22
583:M.21
578:M.19
573:M.18
568:M.17
563:M.16
558:M.15
553:M.14
548:M.10
414:ISBN
395:2024
268:2 ×
119:The
55:Type
33:XB-8
3096:O-6
3091:O-5
3086:O-4
3081:O-3
3076:O-2
3071:O-1
2783:O-9
2778:O-8
2773:O-7
2768:O-6
2763:O-5
2758:O-4
2753:O-3
2748:O-2
2743:O-1
2602:B-2
2597:B-1
2196:B-9
2191:B-8
2186:B-7
2181:B-6
2176:B-5
2171:B-4
2166:B-3
2161:B-2
2156:B-1
2108:B-2
2103:B-1
1920:A-2
1796:C-7
1791:C-5
1786:C-2
1781:T-2
1690:F-9
1666:130
1661:100
1574:T.V
1516:S.X
1491:S.V
1471:S.I
1448:G.I
1397:F28
1392:F27
1387:F26
1317:F.X
1292:F.V
1272:F.I
1171:D.X
1138:C.X
1113:C.V
1080:B.V
1060:B.I
1023:K.I
1010:F.I
997:E.V
977:E.I
936:D.V
916:D.I
903:C.I
880:A.I
848:B.I
826:W.4
821:W.3
816:W.2
811:W.1
641:V.9
636:V.8
631:V.7
626:V.6
621:V.5
616:V.4
611:V.3
606:V.2
601:V.1
543:M.9
538:M.8
533:M.7
528:M.6
523:M.5
518:M.4
513:M.3
508:M.2
503:M.1
3150::
1826:RA
1656:70
1651:60
1641:50
438:–
383:.
343:^
2720:/
2705:e
2698:t
2691:v
1992:/
1988:/
1984:/
1974:e
1967:t
1960:v
474:e
467:t
460:v
420:.
397:.
226:4
20:)
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