The Willomet Charger

[1970RT]

Originally Posted by andrewb70

David,

The offset makes perfect sense, given your goals.

Can you elaborate more on the material used in the crossmember and why it was built the way it was, etc...?

Andrew

The frame mounts are .110 mild steel, so there’s a nice .220 bearing surface for the mounting bolts. The cradle is .180 aluminum.

The idea is straightforward enough - build an additional cradle for the engine so the frame mounts can resist both twist and the spreading force from the weight of the engine in place. I like to use overlay plates and a skeleton construction since it’s a good way to shed 15-20% of the mass. The cradle didn’t need to be steel, and was a good chance to use aluminum to get some added rigidity with a minimal weight penalty.

David