The longitudinal axis of each engine cylinder intersects perpendicularly to {TAIL ~ the axis} of {HEAD ~ the engine power shaft} 
The longitudinal axis of each engine cylinder intersects perpendicularly to { TAIL ~ the axis } of { HEAD ~ the engine power shaft }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD