
THE RECIPROCATING PISTON PETROL ENGINE 11
a spring. In actual practice, a compromise is often
sought by loading the rubber partly in compression
and partly in shear by inclining the rubber mountings
(Figure
1.17).
Another advantage of using rubber,
rather than steel, for the spring medium is that trans-
mission of sound through the mountings is less, since
there is no metal-to-metal path for the sound to travel
along.
1.5 CYLINDER AND CRANKTHROW
ARRANGEMENTS
Cylinder number and displacement
Every new engine must be designed with a specific type
of service in view, which then determines its general
characteristics. Important among these for th ...