Guys, ya gotta understand my criteria. I BUILD AND FLY SCALE !
When I make a low pass over the runway, I want to be able to read the numbers on the side of that old 1931 racer.

Vertical is the furthest thing from my mind. Shame on you for even thinking that way. This is a 1931 Gee Bee racer. Ya wanna go fast and vertical, build a Diamond Dust, but give that old timer a little respect. But I can't stop you from being stupid, ( different strokes for different folks, right ? ) so if y'all want to put an OS 1.60 in it, go right ahead. Just be sure to report back here in a few weeks and tell me what you have left.

I've been flying mine with a TT .46 for about a year now, and it goes like a scalded cat. Takeoffs and landings are smooth as silk. It flys at a scale like speed, "On the Wing" ( I know that some of you will not understand that statement ); it loops, rolls, flys inverted, and is a delightful little plane to fly. It really looks it's best flying by you at a scale speed, not Mach 2.5.

I balanced mine at 25%, and it wasn't really a problem. I built a little bracket directly under the engine, and mounted the battery pack on it. Lotsa room under that big ole cowl, so get ya stuff up front, and ditch them hardwood push rods and use plastic in plastic. Keeps the tail lighter.

I sincerely wish y'all the good luck that I have had with mine.

Jim

Did I read Saito 100 back there ? Sheech ! Go for the 180.