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do 4 stroke rotax engine valves rotate?

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xwing

Well-Known Member
Joined
Nov 15, 2014
Messages
82
Location
toronto
Typical air cooled 4 stroke engines use Roto Coils
http://www.aircraftspecialties.aero/roto-coil-assy-652112/
https://www.aopa.org/training-and-safety/air-safety-institute/valve-safety
Valve Rotation

Exhaust valves are designed to rotate, and this rotation is essential to valve longevity since it helps prevent deposits from building up around the seat, stem, and guide. At a typical 2,400-rpm cruise, each exhaust valve opens and closes 1,200 times a minute, and each valve rotates once per minute.
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