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Thomas-Morse XP-13 Viper

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149: 40: 266: 255: 183:-1 Chieftain engine, (a novel 12-cylinder two-row air-cooled radial with the rear cylinders directly behind the front cylinders rather than staggered as normal in a two-row radial) for which the XP-13 incorporated a complex system of baffles to direct cooling air over the engine, the engine simply would not stay cool enough, and in September 1930 it was replaced with a 810: 1955: 651: 727: 179:
skin built over a metal frame; the flying surfaces were also metal-framed, but covered with the traditional fabric. While designed to use the 600 hp
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of 450 hp. Ironically, the lower-power engine actually resulted in a speed increase of 15 mph, at least partly because of the weight savings.
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of 1919. Financed by the company, and named the "Viper", it was officially purchased by the Army in June 1929 and designated "XP-13".
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The Complete Book of Fighters: An Illustrated Encyclopedia of Every Fighter Aircraft Built and Flown
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Not assigned  • Unofficial  • Assigned to multiple types
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Editors: William Green & Gordon Swanborough (Barnes & Noble Books New York, 1998,
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designs built in hopes of a production contract from the Army, following the successful
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In the end, the Army decided against production, Thomas-Morse was acquired by
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Side view of P&W-powered XP-13A variant showing corrugated aluminum skin
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version of the Viper with the Curtiss H-1640-1 Chieftain hex engine
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Prototype, serial number 29-453 with 600 hp (448 kW)
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150 kn (172 mph, 277 km/h) (at sea level)
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London: Guild Publishing, 1986. 413:1,700 ft/min (8.6 m/s) 348:189 sq ft (17.6 m) 342:8 ft 5 in (2.56 m) 160:This aircraft was one of several 134:Thomas-Morse Aircraft Corporation 264: 185:Pratt & Whitney SR1340C Wasp 38: 2129:Single-engined tractor aircraft 522: 505: 370:12-cyliner two-row air-cooled 279:United States Army Air Service 89:United States Army Air Service 13: 1: 467:The Complete Book of Fighters 448: 407:20,775 ft (6,300 m) 360:3,256 lb (1,477 kg) 354:2,262 lb (1,026 kg) 220:Pratt & Whitney SR-1340-C 2139:Aircraft first flown in 1929 249: 7: 426: 197: 10: 2155: 596:Berliner-Joyce XP-13 Viper 550:Dorr and Donald 1990, p.43 368:Curtiss H-1640-1 Chieftain 208:Curtiss H-1640-1 Chieftain 154:Curtiss H-1640-1 Chieftain 152:The XP-13, powered by the 2090: 2074: 1980: 1943: 1721: 1712: 1682: 1661: 1635: 1325: 827: 818: 675: 644: 107: 102: 94: 84: 74: 62: 54: 49: 37: 32: 27:Prototype biplane fighter 438:List of fighter aircraft 567:. London:Temple, 1990. 315:General characteristics 226:, along with a revised 259: 157: 144:Design and development 2134:Thomas-Morse aircraft 2098:"  • 257: 192:Consolidated Aircraft 151: 2075:Related designations 1713:Tri-service sequence 1981:Covert designations 1662:Fighter, multiplace 1326:Fighter (1948–1962) 828:Pursuit (1924–1948) 502:Gunston 1986, p.46. 50:General information 2100:1919–1924 sequence 260: 158: 138:United States Army 44:Thomas-Morse XP-13 2106: 2105: 1976: 1975: 1708: 1707: 813:post-1962 systems 761: 760: 519:, 1975) pp. 46–47 374:, 600 hp (448 kW) 306:978-0-86101-643-3 175:had a corrugated 166:Thomas-Morse MB-3 162:B. Douglas Thomas 115: 114: 108:Introduction date 79:B. Douglas Thomas 16:(Redirected from 2146: 1904: 1828: 1719: 1718: 1636:Pursuit, biplace 1228: 825: 824: 788: 781: 774: 765: 764: 630: 623: 616: 607: 606: 551: 548: 537: 526: 520: 509: 503: 500: 494: 487: 478: 464: 421: 405:Service ceiling: 382: 317: 310: 270: 268: 267: 128:designed by the 126:fighter aircraft 121:was a prototype 42: 30: 29: 21: 2154: 2153: 2149: 2148: 2147: 2145: 2144: 2143: 2109: 2108: 2107: 2102: 2093: 2086: 2070: 1972: 1939: 1902: 1826: 1714: 1704: 1678: 1657: 1631: 1321: 1226: 820: 814: 792: 762: 757: 671: 645:Thomas Brothers 640: 634: 592: 555: 554: 549: 540: 527: 523: 510: 506: 501: 497: 488: 481: 465: 461: 451: 429: 422: 417: 378: 313: 307: 287: 265: 263: 252: 200: 146: 80: 45: 28: 23: 22: 15: 12: 11: 5: 2152: 2142: 2141: 2136: 2131: 2126: 2121: 2104: 2103: 2091: 2088: 2087: 2085: 2084: 2078: 2076: 2072: 2071: 2069: 2068: 2063: 2062: 2061: 2056: 2048: 2047: 2046: 2036: 2035: 2034: 2024: 2023: 2022: 2014: 2013: 2012: 2002: 2001: 2000: 1995: 1984: 1982: 1978: 1977: 1974: 1973: 1971: 1970: 1965: 1964: 1963: 1958: 1947: 1945: 1944:Non-sequential 1941: 1940: 1938: 1937: 1932: 1931: 1930: 1925: 1915: 1910: 1905: 1900: 1899: 1898: 1893: 1883: 1878: 1877: 1876: 1871: 1861: 1860: 1859: 1854: 1849: 1844: 1834: 1829: 1824: 1823: 1822: 1812: 1807: 1802: 1801: 1800: 1790: 1785: 1780: 1775: 1774: 1773: 1763: 1762: 1761: 1751: 1746: 1741: 1740: 1739: 1734: 1725: 1723: 1716: 1715:(1962–present) 1710: 1709: 1706: 1705: 1703: 1702: 1697: 1692: 1686: 1684: 1683:Non-sequential 1680: 1679: 1677: 1676: 1671: 1665: 1663: 1659: 1658: 1656: 1655: 1650: 1645: 1639: 1637: 1633: 1632: 1630: 1629: 1628: 1627: 1622: 1617: 1612: 1607: 1597: 1592: 1587: 1582: 1577: 1576: 1575: 1570: 1562: 1557: 1556: 1555: 1550: 1545: 1535: 1530: 1529: 1528: 1518: 1513: 1512: 1511: 1501: 1496: 1491: 1486: 1481: 1476: 1471: 1466: 1461: 1456: 1451: 1446: 1441: 1436: 1435: 1434: 1429: 1419: 1414: 1413: 1412: 1407: 1397: 1392: 1387: 1382: 1377: 1372: 1371: 1370: 1360: 1355: 1350: 1345: 1340: 1335: 1329: 1327: 1323: 1322: 1320: 1319: 1314: 1309: 1304: 1299: 1294: 1289: 1284: 1279: 1274: 1269: 1264: 1259: 1254: 1249: 1244: 1239: 1234: 1229: 1224: 1219: 1214: 1209: 1204: 1199: 1194: 1189: 1184: 1179: 1174: 1169: 1164: 1159: 1154: 1153: 1152: 1147: 1139: 1134: 1129: 1124: 1119: 1114: 1109: 1104: 1099: 1094: 1089: 1084: 1079: 1074: 1069: 1064: 1059: 1054: 1049: 1044: 1043: 1042: 1032: 1027: 1022: 1017: 1012: 1007: 1002: 997: 992: 987: 982: 977: 972: 967: 962: 957: 952: 947: 942: 937: 932: 927: 922: 917: 912: 907: 902: 897: 892: 887: 882: 877: 872: 867: 862: 861: 860: 855: 847: 842: 837: 831: 829: 822: 819:1924 sequences 816: 815: 791: 790: 783: 776: 768: 759: 758: 756: 755: 750: 745: 740: 735: 730: 725: 720: 715: 710: 705: 700: 695: 690: 685: 679: 677: 673: 672: 670: 669: 664: 659: 654: 648: 646: 642: 641: 633: 632: 625: 618: 610: 604: 603: 598: 591: 590:External links 588: 587: 586: 576: 560: 559: 553: 552: 538: 521: 504: 495: 491:James C. Fahey 479: 458: 457: 456: 455: 450: 447: 446: 445: 440: 428: 425: 415: 414: 411:Rate of climb: 408: 402: 396: 390: 387:Maximum speed: 376: 375: 361: 355: 349: 343: 337: 331: 325: 305: 299:. Salamander. 286: 283: 282: 281: 275: 274: 251: 248: 247: 246: 239: 235: 234: 222:enclosed in a 216: 212: 211: 204: 199: 196: 181:Curtiss H-1640 145: 142: 113: 112: 109: 105: 104: 100: 99: 96: 92: 91: 86: 82: 81: 78: 76: 72: 71: 66: 60: 59: 56: 52: 51: 47: 46: 43: 35: 34: 26: 9: 6: 4: 3: 2: 2151: 2140: 2137: 2135: 2132: 2130: 2127: 2125: 2122: 2120: 2117: 2116: 2114: 2101: 2097: 2089: 2083: 2080: 2079: 2077: 2073: 2067: 2064: 2060: 2057: 2055: 2052: 2051: 2049: 2045: 2042: 2041: 2040: 2037: 2033: 2030: 2029: 2028: 2025: 2021: 2018: 2017: 2015: 2011: 2008: 2007: 2006: 2003: 1999: 1996: 1994: 1991: 1990: 1989: 1986: 1985: 1983: 1979: 1969: 1966: 1962: 1959: 1957: 1954: 1953: 1952: 1949: 1948: 1946: 1942: 1936: 1933: 1929: 1926: 1924: 1921: 1920: 1919: 1916: 1914: 1911: 1909: 1906: 1901: 1897: 1894: 1892: 1889: 1888: 1887: 1884: 1882: 1879: 1875: 1872: 1870: 1867: 1866: 1865: 1862: 1858: 1857:F-15 STOL/MTD 1855: 1853: 1850: 1848: 1845: 1843: 1840: 1839: 1838: 1835: 1833: 1830: 1825: 1821: 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400: 397: 394: 393:Cruise speed: 391: 388: 385: 384: 383: 381: 373: 372:radial engine 369: 365: 362: 359: 358:Gross weight: 356: 353: 352:Empty weight: 350: 347: 344: 341: 338: 335: 332: 329: 326: 323: 320: 319: 318: 316: 311: 308: 302: 298: 297: 291: 280: 277: 276: 273: 272:United States 262: 261: 256: 244: 240: 237: 236: 233: 229: 225: 221: 217: 214: 213: 209: 205: 202: 201: 195: 193: 188: 186: 182: 178: 174: 169: 167: 163: 155: 150: 141: 139: 135: 131: 127: 124: 120: 110: 106: 101: 97: 93: 90: 87: 83: 77: 73: 70: 67: 65: 61: 57: 53: 48: 41: 36: 31: 19: 2027:YF-113 (III) 2016:YF-113 (II) 909: 904: 752: 676:Thomas-Morse 637:Thomas-Morse 582: 564: 558:Bibliography 524: 507: 498: 466: 462: 431: 430: 418: 416: 410: 404: 398: 392: 386: 379: 377: 363: 357: 351: 345: 339: 333: 327: 321: 314: 312: 295: 289: 288: 224:NACA cowling 189: 170: 159: 118: 116: 95:Number built 85:Primary user 69:Thomas-Morse 64:Manufacturer 2094:See also: " 1620:AFTI/F-111A 1432:F-86D/G/K/L 853:Curtiss P-4 821:(1924–1962) 811:Tri-Service 753:XP-13 Viper 380:Performance 364:Powerplant: 119:XP-13 Viper 18:XP-13 Viper 2113:Categories 2005:YF-113 (I) 858:Boeing P-4 449:References 346:Wing area: 210:hex engine 171:The XP-13 2044:YF-114C/D 2020:YF-113B/D 1993:YF-110B/D 1891:F/A-18E/F 334:Wingspan: 290:Data from 250:Operators 111:June 1929 2124:Biplanes 639:aircraft 427:See also 419:Armament 198:Variants 177:aluminum 173:fuselage 132:company 130:American 75:Designer 2059:YF-117D 2054:YF-117A 2050:YF-117 2032:YF-113C 2010:YF-113A 1998:YF-110C 1625:EF-111A 1553:NF-104A 1405:F-84F/J 536:), 1987 340:Height: 328:Length: 243:Curtiss 123:biplane 103:History 58:Fighter 2066:YF-118 2039:YF-114 1988:YF-110 1896:EA-18G 1886:F/A-18 1874:NF-16D 1869:F-16XL 1847:F-15EX 1798:F-9F–J 1759:F-4K/M 1737:F-1E/F 1732:F-1C/D 1615:F-111K 1610:F-111C 1605:F-111B 1568:XF-106 1564:F-106 1548:F-104S 1543:XF-104 1526:F-102B 1509:F-100B 1368:RF-61C 748:Y1O-42 743:Y1O-41 571:  532:  515:  473:  399:Range: 303:  269:  232:rudder 215:XP-13A 156:engine 2082:FV-12 1968:F-117 1956:F-35I 1928:FB-22 1923:YF-22 1852:F-15J 1842:F-15E 1820:F-12C 1700:P-400 1695:P-322 1600:F-111 1595:F-110 1590:F-109 1585:F-108 1580:F-107 1573:F-106 1560:F-105 1538:F-104 1533:F-103 1521:F-102 1516:F-101 1504:F-100 1427:F-86C 1410:F-84H 1145:XP-59 1141:P-59 1040:P-39E 803:USAAF 799:USAAC 795:USAAS 733:TM-24 728:TM-23 718:MB-10 454:Notes 423:none 322:Crew: 238:XP-14 203:XP-13 33:XP-13 2096:F-19 1961:X-35 1951:F-35 1935:F-23 1918:F-22 1913:F-21 1908:F-20 1903:F-19 1881:F-17 1864:F-16 1837:F-15 1832:F-14 1827:F-13 1815:F-12 1810:F-11 1805:F-10 1728:F-1 1690:F-24 1674:FM-2 1669:FM-1 1653:PB-3 1648:PB-2 1643:PB-1 1499:F-99 1494:F-98 1489:F-97 1484:F-96 1479:F-95 1474:F-94 1469:F-93 1464:F-92 1459:F-91 1454:F-90 1449:F-89 1444:F-88 1439:F-87 1422:F-86 1417:F-85 1400:F-84 1395:F-83 1390:F-82 1385:F-81 1380:F-80 1375:F-63 1363:F-61 1358:F-59 1353:F-51 1348:F-47 1343:F-40 1338:F-39 1333:F-38 1317:P-92 1312:P-91 1307:P-90 1302:P-89 1297:P-88 1292:P-87 1287:P-86 1282:P-85 1277:P-84 1272:P-83 1267:P-82 1262:P-81 1257:P-80 1252:P-79 1247:P-78 1242:P-77 1237:P-76 1232:P-75 1227:P-74 1222:P-73 1217:P-72 1212:P-71 1207:P-70 1202:P-69 1197:P-68 1192:P-67 1187:P-66 1182:P-65 1177:P-64 1172:P-63 1167:P-62 1162:P-61 1157:P-60 1150:P-59 1137:P-58 1132:P-57 1127:P-56 1122:P-55 1117:P-54 1112:P-53 1107:P-52 1102:P-51 1097:P-50 1092:P-49 1087:P-48 1082:P-47 1077:P-46 1072:P-45 1067:P-44 1062:P-43 1057:P-42 1052:P-41 1047:P-40 1035:P-39 1030:P-38 1025:P-37 1020:P-36 1015:P-35 1010:P-34 1005:P-33 1000:P-32 995:P-31 990:P-30 985:P-29 980:P-28 975:P-27 970:P-26 965:P-25 960:P-24 955:P-23 950:P-22 945:P-21 940:P-20 935:P-19 930:P-18 925:P-17 920:P-16 915:P-15 910:P-14 905:P-13 900:P-12 895:P-11 890:P-10 849:P-4 807:USAF 738:O-19 713:MB-9 708:MB-7 703:MB-6 698:MB-4 693:MB-3 688:MB-2 683:MB-1 667:SH-4 569:ISBN 530:ISBN 513:ISBN 471:ISBN 366:1 Ă— 301:ISBN 230:and 117:The 55:Type 1793:F-9 1788:F-8 1783:F-7 1778:F-6 1766:F-5 1754:F-4 1749:F-3 1744:F-2 885:P-9 880:P-8 875:P-7 870:P-6 865:P-5 845:P-3 840:P-2 835:P-1 662:S-4 657:T-2 652:D-5 228:fin 2115:: 723:R5 581:, 541:^ 482:^ 1771:G 805:/ 801:/ 797:/ 787:e 780:t 773:v 629:e 622:t 615:v 575:. 477:) 324:1 309:. 98:1 20:)

Index

XP-13 Viper

Manufacturer
Thomas-Morse
United States Army Air Service
biplane
fighter aircraft
American
Thomas-Morse Aircraft Corporation
United States Army

Curtiss H-1640-1 Chieftain
B. Douglas Thomas
Thomas-Morse MB-3
fuselage
aluminum
Curtiss H-1640
Pratt & Whitney SR1340C Wasp
Consolidated Aircraft
Curtiss H-1640-1 Chieftain
Pratt & Whitney SR-1340-C
NACA cowling
fin
rudder
Curtiss

United States
United States Army Air Service
The Complete Book of Fighters: An Illustrated Encyclopedia of Every Fighter Aircraft Built and Flown
ISBN

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