H engine - Revision history

Red marquis: /* H engines */

2010-05-24T14:31:24Z

H engines

← Older revision		Revision as of 14:31, 24 May 2010
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	Two [[straight engine]]s can be similarly joined to provide a [[U engine]].		Two [[straight engine]]s can be similarly joined to provide a [[U engine]].
	==H engines==		==Automotive engines==

	~~===Automotive engines===~~		The [[British Racing Motors]] (BRM) H-16 Formula One engine won the 1966 US Grand Prix with [[Jim Clark]] in a [[Lotus 43]].<ref>http://members.madasafish.com/~d_hodgkinson/brm-e-H16.htm</ref> As a racing-car engine it was hampered by a high center of gravity, 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.

	*The [[British Racing Motors]] (BRM) H-16 Formula One engine won the 1966 US Grand Prix with [[Jim Clark]] in a [[Lotus 43]].<ref>http://members.madasafish.com/~d_hodgkinson/brm-e-H16.htm</ref> As a racing-car engine it was hampered by a high center of gravity, 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.

	==Other uses of H term==		==Other uses of H term==

Red marquis: /* Automotive engines */

2010-05-24T14:31:08Z

Automotive engines

← Older revision		Revision as of 14:31, 24 May 2010
Line 8:		Line 8:
	===Automotive engines===		===Automotive engines===

	*The [[British Racing Motors]] (BRM) H-16 Formula One engine won the 1966 US Grand Prix with [[Jim Clark]] in a [[Lotus 43]].<ref>http://members.madasafish.com/~d_hodgkinson/brm-e-H16.htm</ref> As a racing-car engine it was hampered by a high [[center of gravity]], 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.		*The [[British Racing Motors]] (BRM) H-16 Formula One engine won the 1966 US Grand Prix with [[Jim Clark]] in a [[Lotus 43]].<ref>http://members.madasafish.com/~d_hodgkinson/brm-e-H16.htm</ref> As a racing-car engine it was hampered by a high center of gravity, 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.

	==Other uses of H term==		==Other uses of H term==

Red marquis at 14:30, 24 May 2010

2010-05-24T14:30:46Z

New page

An '''H engine''' (or H-block) is an [[engine configuration]] in which the [[cylinder (engine)|cylinder]]s are aligned so that if viewed from the front, they appear to be in a vertical or horizontal letter H.

An H engine can be viewed as two [[flat engine]]s, one atop or beside the other. The "two engines" each have their own [[crankshaft]], which are then geared together at one end for power-take-off. The H configuration allows the building of multi-cylinder engines that are shorter than the alternatives, sometimes delivering advantages on aircraft. For race-car applications there is the disadvantage of a higher center of gravity, not only because one crankshaft is located atop the other, but also because the engine must be high enough off the ground to allow clearance underneath for a row of exhaust pipes. The [[power-to-weight ratio]] is not as good as simpler configurations employing one crankshaft. There is excellent mechanical balance, especially desirable and otherwise difficult to achieve in a four cylinder engine. <ref> "CLASSIC MOTOR-CYCLES" ISBN 0863630057. </ref>

Two [[straight engine]]s can be similarly joined to provide a [[U engine]].
==H engines==

===Automotive engines===

*The [[British Racing Motors]] (BRM) H-16 Formula One engine won the 1966 US Grand Prix with [[Jim Clark]] in a [[Lotus 43]].<ref>http://members.madasafish.com/~d_hodgkinson/brm-e-H16.htm</ref> As a racing-car engine it was hampered by a high [[center of gravity]], 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.

==Other uses of H term==
[[Subaru]] produces water-cooled flat-4 and [[flat-6]] "Horizontal" engines that are marketed as H-4 and H-6 (also thought to represent the configuration of the cylinders from a 'top down' POV as opposed to the traditional 'head-on' POV).

==See Also==

{{Piston engine configurations}}

[[Category:Boxer engines]]