I am thinking of buying a yellow aircraft P47 or Zero. I am also thinking of using either a 3W 50 or 60 engine. Which engine would be better? And how does it fit it the cowl. What length of Stand Off do I need.

I like to fly my warbirds with some speed and large loops.

This is easy one, go with ZDZ 50. It is better then 3W
vik

I have a Taurus 3.2 in my Yellow P-47. Since it's a radial cowl you can use just about engine without clearence problems. The 3.2 is about 50cc's and if you like to "zoom" you shouldn't go smaller. BobH.

3.2 Brison, or since you have to add a little nose weight G-62

This one has a Brison 3.2, the other a sachs 3.2