wherein the slide valve is a rotary slide valve of which a rotor is formed by {TAIL ~ the crankcase} and a stator is a ring housing, wherein {HEAD ~ the crankshaft} is stationary in operation, 
wherein the slide valve is a rotary slide valve of which a rotor is formed by { TAIL ~ the crankcase } and a stator is a ring housing , wherein { HEAD ~ the crankshaft } is stationary in operation ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH