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German firm Konig, who specialised in racing outboard motors, built a few 1000cc H-8s in the 1970s, which were basically two of their VC500 flat fours mounted one above the other, with the direction of rotation reversed on one of them. Each half of the engine was a water cooled 2-stroke with
148:
However, H engines are relatively heavy and have a high centre of gravity. The latter is not only due to the second crankshaft being located near the top of the engine, but also the engine must be high enough off the ground to allow clearance underneath for the exhaust pipes.
435:
rotating disc valve driven by a toothed belt via two 45/90 degree pulleys, plus two siamesed expansion chamber exhausts, fed by two single choke carbs. Both cylinders at each end of each engine fired at the same time, hence the siamesed exhausts for each pair.
46:(complete with separate crankshafts), most often geared to a common output shaft. The name "H engine" is due to the engine blocks resembling a letter "H" when viewed from the front. The most successful "H" engine in this form was the
352:
motorcycle, first shown in 1938. A 1,000 cc H-4 design and a few units were produced in early 1939. Any development planned was interrupted by World War II and subsequent years of austerity.
315:, and it was heavy and complex, with gear-driven twin overhead cams for each of four cylinder heads, two gear-coupled crankshafts, and mechanical fuel injection.
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and its derivatives. The name was also applied to engines of the same basic layout, but rotated through 90 degrees—most famously the
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engines as "H4" and "H6" respectively. The letter "H" in this case refers to "horizontally-opposed", an alternative term for
141:
The benefits of an H engine are the ability to share common parts with the flat engine upon which it is based, and the good
69:
The H engine is a relatively rare layout, with its main use being in aircraft engines during the 1930s and 1940s. The 1966
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built a motorcycle prototype with a similar configuration to the Brough
Superior Golden Dream and exhibited it at the
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455:; these engines can also be said to look like a "H" or conjoined "H"s, albeit from the top and in schematic form.
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which results in less vibration (which is difficult to achieve in many other types of four-cylinder engines).
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244:(1934) – H-24, air-cooled vertical, 16.85 litres 890 hp (660 kW), a development of the Rapier
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250:(1938) – H-24, water-cooled horizontal sleeve valves, 36.7 litres 3,500 hp (2,600 kW).
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car driven by Graham Hill and Jackie
Stewart. As a racing-car engine it was hampered by a high
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through separate concentric shafts. Although successful, they only existed in prototype form.
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16-cylinder H engine, and an 8-cylinder H engine was used for powerboat racing in the 1970s.
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engine produced from 1981 to 2009. The letter "H" represents "high compression".
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238:(1929) – H-16 air-cooled vertical, 8.83 litres 340 hp (250 kW)
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406: in this section. Unsourced material may be challenged and removed.
113: in this section. Unsourced material may be challenged and removed.
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driven by Jim Clark. It was also used by the unsuccessful 1966
303:(BRM) H-16 Formula One engine won the 1966 US Grand Prix in a
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290:(1944) – H-24, 46.2 litres, 3,200 hp (2,400 kW).
62:, where the two engines retained separate drives, driving
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Inline engine with four banks driving two crankshafts
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366:in 1948 and again in 1951. This was replaced by a
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54:series. A variation on the "H" theme were the
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218:(1939) – H-24 2,240 hp (1,670 kW)
156:layout uses a similar concept, placing two
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422:Learn how and when to remove this message
129:Learn how and when to remove this message
339:
172:
18:
585:. London: Dorling Kindersley. pp.
198:" (1930s) 2,300 hp (1,700 kW)
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212:(1939) – 1,500 hp (1,100 kW)
635:
344:Brough Superior H-4 motorcycle engine
335:
404:adding citations to reliable sources
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111:adding citations to reliable sources
84:
27:For the EMD V12/V16 "H-Engine", see
168:
13:
583:The Encyclopedia of the Motorcycle
551:
528:
14:
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560:(July 1967): 328. Archived from
537:(July 1967): 327. Archived from
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360:British International Motor Show
320:
88:
391:needs additional citations for
98:needs additional citations for
603:
568:
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522:
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330:H-16 engine (64-valve version)
224:Klöckner-Humboldt-Deutz DZ 720
1:
469:
364:Earls Court Exhibition Centre
1194:Piston engine configurations
370:prototype at the 1953 show.
350:Brough Superior Golden Dream
180:H-24 engine (starboard side)
7:
226:– H-32, 102.9 litres diesel
10:
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1199:Engines by cylinder layout
554:"Lotus 43 & B.R.M. 83"
531:"Lotus 43 & B.R.M. 83"
295:Formula One racing engines
163:
64:Contra-rotating propellers
26:
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875:
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615:www.quincylooperracing.us
80:
511:. Members.madasafish.com
483:Willoughby, Vic (1989).
443:Subaru has marketed its
374:Powerboat racing engines
42:comprising two separate
23:Animation of an H engine
578:"Brough Superior Dream"
439:Other engines named "H"
73:Formula One car used a
795:Single-acting cylinder
728:Double-acting cylinder
345:
282:- H-24, liquid-cooled,
276:- H-24, liquid-cooled,
270:- H-24, liquid-cooled,
264:- H-24, liquid-cooled,
181:
24:
663:Engine configurations
575:Wilson, Hugo (1995).
343:
301:British Racing Motors
176:
22:
765:Oscillating cylinder
485:Classic motor cycles
400:improve this article
210:Fairey Prince (H-16)
107:improve this article
56:Fairey Prince (H-16)
858:Two-and four-stroke
760:Intake over exhaust
256:Pratt & Whitney
230:D. Napier & Son
60:Fairey P.24 Monarch
346:
336:Motorcycle engines
182:
25:
1181:
1180:
1177:
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877:Inline / straight
775:Overhead camshaft
611:"Quincy vs Konig"
541:on 26 March 2016.
509:"BRM engines H16"
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368:flat-four engined
313:center of gravity
288:Rolls-Royce Eagle
139:
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868:Cylinder layouts
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564:on 4 March 2016.
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169:Aircraft engines
158:straight engines
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204:Fairey Aviation
192:Lycoming H-2470
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780:Overhead valve
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667:piston engines
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216:Fairey Monarch
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160:side-by-side.
143:engine balance
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830:Stroke cycles
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494:0-86363-005-7
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464:straight-four
461:
460:Saab H engine
456:
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450:
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412:November 2019
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395:
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389:This section
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242:Napier Dagger
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236:Napier Rapier
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119:November 2019
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96:This section
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91:
87:
86:
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76:
72:
67:
65:
61:
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53:
49:
48:Napier Dagger
45:
41:
40:piston engine
37:
30:
21:
1159:Split-single
1148:
945:Flat / boxer
805:Swing-piston
618:. Retrieved
614:
605:
582:
570:
562:the original
557:
547:
539:the original
534:
524:
513:. Retrieved
503:
487:. Ivy Leaf.
484:
478:
457:
453:flat engines
442:
433:
418:
409:
398:Please help
393:verification
390:
354:
347:
298:
248:Napier Sabre
196:hyper engine
178:Napier Sabre
151:
147:
140:
125:
116:
105:Please help
100:verification
97:
68:
52:Napier Sabre
44:flat engines
35:
33:
848:Five-stroke
843:Four-stroke
800:Split cycle
738:Free-piston
681:Atmospheric
620:16 November
1188:Categories
853:Six-stroke
838:Two-stroke
755:Heron head
713:Cam engine
558:Model Cars
535:Model Cars
515:2010-09-12
470:References
445:flat-four
785:Pentroof
733:Flathead
723:Compound
701:Rotative
449:flat-six
305:Lotus 43
186:Lycoming
154:U engine
71:Lotus 43
36:H engine
993:V / Vee
810:Uniflow
743:Stelzer
718:Camless
696:Cornish
309:BRM P83
280:XH-3730
274:XH-3130
268:XH-2600
262:XH-2240
164:History
29:EMD 265
1154:Radial
1144:Deltic
790:Rotary
708:Bourke
593:
491:
356:Wooler
232:, UK.
194:H-24 "
81:Design
58:&
1137:Other
820:Wedge
686:Axial
587:34–35
462:is a
258:, US
206:, UK
188:, US
38:is a
815:Watt
750:Hemi
691:Beam
674:Type
665:for
622:2019
591:ISBN
489:ISBN
458:The
447:and
348:The
299:The
152:The
1128:W30
1123:W24
1118:W18
1113:W16
1108:W12
1075:V24
1070:V20
1065:V18
1060:V16
1055:V14
1050:V12
1045:V10
1033:VR6
1021:VR5
983:F16
978:F12
973:F10
935:I14
930:I12
402:by
362:at
328:BRM
109:by
75:BRM
34:An
1190::
1103:W8
1098:W6
1093:W3
1040:V8
1028:V6
1016:V5
1011:V4
1006:V3
1001:V2
968:F8
963:F6
958:F4
953:F2
925:I9
920:I8
915:I7
910:I6
905:I5
900:I4
895:I3
890:I2
885:I1
613:.
589:.
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1169:X
1164:U
1149:H
1085:W
655:e
648:t
641:v
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419:(
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410:(
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126:(
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117:(
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31:.
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