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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
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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.
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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.
57:(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
363:
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.
326:, 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
152:
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
80:
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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466:; 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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255:(1934) – H-24, air-cooled vertical, 16.85 litres 890 hp (660 kW), a development of the Rapier
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261:(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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249:(1929) – H-16 air-cooled vertical, 8.83 litres 340 hp (250 kW)
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417: in this section. Unsourced material may be challenged and removed.
124: 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
314:(BRM) H-16 Formula One engine won the 1966 US Grand Prix in a
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301:(1944) – H-24, 46.2 litres, 3,200 hp (2,400 kW).
73:, where the two engines retained separate drives, driving
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Inline engine with four banks driving two crankshafts
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65:series. A variation on the "H" theme were the
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229:(1939) – H-24 2,240 hp (1,670 kW)
167:layout uses a similar concept, placing two
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433:Learn how and when to remove this message
140:Learn how and when to remove this message
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183:
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596:. London: Dorling Kindersley. pp.
209:" (1930s) 2,300 hp (1,700 kW)
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223:(1939) – 1,500 hp (1,100 kW)
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355:Brough Superior H-4 motorcycle engine
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415:adding citations to reliable sources
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122:adding citations to reliable sources
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38:For the EMD V12/V16 "H-Engine", see
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24:
594:The Encyclopedia of the Motorcycle
562:
539:
25:
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571:(July 1967): 328. Archived from
548:(July 1967): 327. Archived from
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371:British International Motor Show
331:
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402:needs additional citations for
109:needs additional citations for
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341:H-16 engine (64-valve version)
235:Klöckner-Humboldt-Deutz DZ 720
13:
1:
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375:Earls Court Exhibition Centre
1205:Piston engine configurations
381:prototype at the 1953 show.
361:Brough Superior Golden Dream
191:H-24 engine (starboard side)
7:
237:– H-32, 102.9 litres diesel
10:
1226:
1210:Engines by cylinder layout
565:"Lotus 43 & B.R.M. 83"
542:"Lotus 43 & B.R.M. 83"
306:Formula One racing engines
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75:Contra-rotating propellers
37:
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626:www.quincylooperracing.us
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522:. Members.madasafish.com
494:Willoughby, Vic (1989).
454:Subaru has marketed its
385:Powerboat racing engines
53:comprising two separate
34:Animation of an H engine
589:"Brough Superior Dream"
450:Other engines named "H"
84:Formula One car used a
806:Single-acting cylinder
739:Double-acting cylinder
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293:- H-24, liquid-cooled,
287:- H-24, liquid-cooled,
281:- H-24, liquid-cooled,
275:- H-24, liquid-cooled,
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35:
674:Engine configurations
586:Wilson, Hugo (1995).
354:
312:British Racing Motors
187:
33:
776:Oscillating cylinder
496:Classic motor cycles
411:improve this article
221:Fairey Prince (H-16)
118:improve this article
67:Fairey Prince (H-16)
869:Two-and four-stroke
771:Intake over exhaust
267:Pratt & Whitney
241:D. Napier & Son
71:Fairey P.24 Monarch
357:
347:Motorcycle engines
193:
36:
1192:
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1188:
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888:Inline / straight
786:Overhead camshaft
622:"Quincy vs Konig"
552:on 26 March 2016.
520:"BRM engines H16"
443:
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379:flat-four engined
324:center of gravity
299:Rolls-Royce Eagle
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16:(Redirected from
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879:Cylinder layouts
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575:on 4 March 2016.
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475:straight-four
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471:Saab H engine
467:
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437:
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423:November 2019
416:
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400:This section
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253:Napier Dagger
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247:Napier Rapier
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130:November 2019
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107:This section
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59:Napier Dagger
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51:piston engine
48:
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19:
1170:Split-single
1159:
956:Flat / boxer
816:Swing-piston
629:. Retrieved
625:
616:
593:
581:
573:the original
568:
558:
550:the original
545:
535:
524:. Retrieved
514:
498:. Ivy Leaf.
495:
489:
468:
464:flat engines
453:
444:
429:
420:
409:Please help
404:verification
401:
365:
358:
309:
259:Napier Sabre
207:hyper engine
189:Napier Sabre
162:
158:
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136:
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116:Please help
111:verification
108:
79:
63:Napier Sabre
55:flat engines
46:
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859:Five-stroke
854:Four-stroke
811:Split cycle
749:Free-piston
692:Atmospheric
631:16 November
1199:Categories
864:Six-stroke
849:Two-stroke
766:Heron head
724:Cam engine
569:Model Cars
546:Model Cars
526:2010-09-12
481:References
18:H16 engine
456:flat-four
796:Pentroof
744:Flathead
734:Compound
712:Rotative
460:flat-six
316:Lotus 43
197:Lycoming
165:U engine
82:Lotus 43
47:H engine
1004:V / Vee
821:Uniflow
754:Stelzer
729:Camless
707:Cornish
320:BRM P83
291:XH-3730
285:XH-3130
279:XH-2600
273:XH-2240
175:History
40:EMD 265
1165:Radial
1155:Deltic
801:Rotary
719:Bourke
604:
502:
367:Wooler
243:, UK.
205:H-24 "
92:Design
69:&
1148:Other
831:Wedge
697:Axial
598:34–35
473:is a
269:, US
217:, UK
199:, US
49:is a
826:Watt
761:Hemi
702:Beam
685:Type
676:for
633:2019
602:ISBN
500:ISBN
469:The
458:and
359:The
310:The
163:The
1139:W30
1134:W24
1129:W18
1124:W16
1119:W12
1086:V24
1081:V20
1076:V18
1071:V16
1066:V14
1061:V12
1056:V10
1044:VR6
1032:VR5
994:F16
989:F12
984:F10
946:I14
941:I12
413:by
373:at
339:BRM
120:by
86:BRM
45:An
1201::
1114:W8
1109:W6
1104:W3
1051:V8
1039:V6
1027:V5
1022:V4
1017:V3
1012:V2
979:F8
974:F6
969:F4
964:F2
936:I9
931:I8
926:I7
921:I6
916:I5
911:I4
906:I3
901:I2
896:I1
624:.
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1160:H
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