What is a “Flat-head” V12?

flat-head v12
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What is a “Flat-head” V12?

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The original V12 had flat cylinder heads and the combustion chambers were formed by deep bowls in the piston crowns – an arrangement often referred to as a “Heron head” after the originator, the highly regarded aircraft engine specialist Sam Heron. The unobstructed valves make this engine a much better proposition than the HE as a basis for a high performance power unit.

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