LOL, Funny, I made As on almost all of my spelling tests when I was in school 30 years ago...

thanks for the info. I've got a OS .60 FP BNIB, but the silly thing weighs 23 oz. compared to 17oz for a .46 BB or 12 oz. for a .40 bushed engine. I'm not sure, but I think it is supposed to put out about 1.4 BHP at 15k RPM, vs. 1 BHP for the .40 bushed and I have no idea what the .46 BB will do.

I'm building a SPAD3DT, I don't know what it will weigh, but it will be nose heavy with the .60 up front, and then I would have to add weight to get the CG right.

Thanks again,
Soj