Motor Mounts: Hard or soft?

Monty

Well-Known Member
Joined
Jul 15, 2010
Messages
1,382
Location
Fayetteville, AR / USA
I've noticed that most large multi-cylinder engines have hard mounts : Allison/Rolls/Daimler Benz

The Wittman tail wind V8 was also hard mounted.

simple, light, easy to construct.

It greatly simplifies the cowling design if the engine is hard mounted.

Smaller engines have compliant bushings and the engine floats in the cowl. The cowl has to be self supporting.

So my thoughts are anything with more than 8 cylinders you can get away with a hard mount.

Anything I'm missing?
 
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