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and the propeller was directly driven. By aligning the cylinders the diameter of the engine was less than more conventional radial engines, and it was thought that the use of a
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The H-1640 was the first airworthy 'inline radial' and was sponsored for flight testing in a range of aircraft by the U.S. Government. Among the types selected were the
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in the mid-1920s. In contrast to most multi-row radials, where the cylinders in the rows are staggered to present better airflow for cooling, the
Chieftain used the
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The H-1640 was an air-cooled 12 cylinder two-row radial with the cylinder rows aligned rather than staggered as in most multi-row radials. One piece
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138:. Cooling problems with the rear cylinders caused the project to be canceled with few production engines being built.
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arrangement with the cylinders behind each other to allow pairs of cylinders to share a cast
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103:. The design saw some use in the 1920s but was quickly passed by newer designs.
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Curtis H 1640 Engine - located at the Wings Over The
Rockies museum, Denver, CO
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Abandoned military aircraft engine projects of the United States
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could make the engine more aerodynamically efficient than an
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although this engine had 16 aligned cylinders, forming an
408:. Cambridge, England. Patrick Stephens Limited, 1989.
173:
fitted with a
Curtiss H-1640 Chieftain during testing
390:www.enginehistory.org Retrieved: 17 September 2009
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16:Unusual American 12-cylinder radial aero engine
229:12-cylinder, two-row, air-cooled radial engine
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80:was an unusual American 12-cylinder
1309:US military gas turbine aeroengines
406:World Encyclopaedia of Aero Engines
89:Curtiss Aeroplane and Motor Company
61:Curtiss Aeroplane and Motor Company
13:
293:Single Stromberg NA-U8J carburetor
149:. Further similar engines are the
14:
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308:Direct drive, right-hand tractor
127:. The engine first ran in 1927.
27:
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160:
381:
372:
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1:
1345:1920s aircraft piston engines
360:
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38:National Air and Space Museum
1314:Piston engine configurations
155:Armstrong Siddeley Deerhound
7:
343:
10:
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87:designed and built by the
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78:Curtiss H-1640 Chieftain
35:
26:
21:
1335:Curtiss aircraft engines
365:
355:List of aircraft engines
194:Thomas-Morse XP-13 Viper
151:Armstrong Siddeley Hyena
141:A similar engine is the
1280:W-configuration inline)
609:H-configuration inline)
597:piston aircraft engine
339:0.68 hp/lb (1.13 kW/kg)
330:0.38 hp/cu in (17 kW/L)
221:General characteristics
200:Specifications (H-1640)
1260:VG (inverted-V inline)
685:L (single-bank inline)
657:IV (inverted-V inline)
595:United States military
209:
174:
107:Design and development
1355:Inline radial engines
1237:V (inverted-V inline)
335:Power-to-weight ratio
207:
168:
36:H-1640 engine at the
1159:V (upright-V inline)
256:1,640 cu in (26.9 L)
153:and the much larger
378:Gunston 1989, p. 46
599:designation system
210:
179:Curtiss XP-22 Hawk
175:
132:Thomas-Morse XP-13
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1321:
561:
560:
388:Curtiss Chieftain
287:Overhead camshaft
216:enginehistory.org
117:overhead camshaft
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454:aircraft engines
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262:45 in (1,143 mm)
247:5½ in (139.7 mm)
238:5⅝ in (142.9 mm)
189:Curtiss P-6 Hawk
115:shared a single
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404:Gunston, Bill.
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321:615 hp (459 kW)
315:
297:Cooling system:
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271:900 lb (408 kg)
223:
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169:A Thomas-Morse
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607:H (four-bank
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414:1-85260-163-9
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350:
349:Related lists
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323:
320:
319:Power output:
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184:Curtiss YP-20
182:
180:
177:
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172:
167:
158:
156:
152:
148:
144:
143:Bristol Hydra
139:
137:
136:Curtiss XO-18
133:
128:
126:
125:inline engine
122:
118:
114:
104:
102:
98:
97:cylinder head
94:
93:inline radial
90:
86:
83:
79:
69:
66:
65:
62:
59:
57:Manufacturer
56:
55:
52:
49:
46:
43:
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34:
30:
25:
20:
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405:
398:Bibliography
383:
374:
348:
347:
333:
324:
318:
302:
296:
291:Fuel system:
290:
281:
265:
259:
252:Displacement
250:
241:
232:
226:
215:
212:
211:
161:Applications
140:
129:
121:Townend ring
110:
77:
75:
738:O (opposed)
313:Performance
171:XP-13 Viper
85:aero engine
51:aero engine
1329:Categories
1250:V-1650 (L)
1212:V-1650 (P)
934:R-370 (LB)
911:R (radial)
485:Challenger
361:References
299:Air-cooled
283:Valvetrain
276:Components
267:Dry weight
67:First run
1301:See also:
964:R-540 (K)
959:R-540 (W)
939:R-370 (K)
881:O-540 (L)
876:O-540 (F)
841:O-360 (L)
836:O-360 (C)
806:O-200 (F)
801:O-200 (C)
260:Diameter:
213:Data from
101:camshafts
344:See also
134:and the
1268:VG-1410
1149:XR-7755
675:IV-2220
670:IV-2040
665:IV-1430
642:XH-3730
637:XH-3130
632:XH-2600
627:XH-2470
622:XH-2240
500:Model K
451:Curtiss
147:octagon
22:H-1640
1304:X-1800
1288:W-2779
1227:V-3420
1222:V-1950
1217:V-1710
1207:V-1570
1202:V-1560
1197:V-1510
1192:V-1460
1187:V-1440
1182:V-1400
1177:V-1237
1172:V-1150
1144:R-4360
1139:R-4090
1134:R-3350
1129:R-2800
1124:R-2600
1119:R-2180
1114:R-2160
1109:R-2060
1104:R-2000
1099:R-1860
1094:R-1830
1089:R-1820
1084:R-1750
1079:R-1690
1074:R-1670
1069:R-1640
1064:R-1535
1059:R-1510
1054:R-1454
1049:R-1340
1044:R-1300
1039:R-1044
1029:DR-980
901:O-1230
647:H-4070
617:H-1640
553:R-1454
543:H-1640
520:V-1570
412:
243:Stroke
82:radial
48:Radial
1245:V-770
1167:V-720
1034:R-985
1024:R-975
1019:R-915
1014:R-830
1009:R-790
1004:R-760
999:R-755
994:R-720
989:R-680
984:R-670
979:R-600
974:R-550
969:R-545
954:R-500
949:R-440
944:R-420
929:R-270
924:R-265
919:R-250
896:O-805
891:O-580
886:O-550
871:O-520
866:O-480
861:O-470
856:O-435
851:O-425
846:O-405
831:O-335
826:O-300
821:O-290
816:O-235
811:O-205
796:O-190
791:O-180
786:O-175
781:O-170
776:O-150
771:O-145
766:O-100
728:L-825
723:L-510
718:L-440
713:L-410
708:L-390
703:L-375
698:L-365
693:L-330
548:R-600
366:Notes
227:Type:
70:1926
44:Type
761:O-90
756:O-45
751:O-40
746:O-15
510:OX-5
495:K-12
490:D-12
410:ISBN
234:Bore
99:and
76:The
525:V-2
515:OXX
480:C-6
475:B-8
470:A-2
1331::
157:.
587:e
580:t
573:v
505:O
443:e
436:t
429:v
337::
328::
306::
285::
269::
254::
245::
236::
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
