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A Promising Evolution in Engine Design - The Coates Spherical Rotary Valve
Coates Spherical Valvetrain
Rotary Valve Engine 3.0 Slow Idle
short demo of workings of a Cross Rotary Valve Engine (exhibit from 1934 Olympia show)
Rotary Valve and Channel Update
Carr Rotary Valve - A Novel Rotary Valve Engine Design - Seals without Seizing
COATES SPHERICAL ROTARY VALVE 855 CI
Conjoined piston engine with Rotary valves.
Rare HRD with Cross Transverse Rotary Valve Engine
Sustainable Planet Program on the Coates CSRV Engine
Ralph Watson BSA Rotary Valve teardown
Ralph Watson on the evolution of APC
