I've finished putting together my Phoenix Spitfire .46-55 ARF. The C.G in the book say 90mm to 95mm. When I put it at 90mm I have to add a little under 6oz of weight just behind the engine to get it to balance. Does anyone else have experience of the best place for the C.G to be? I'm using electric retracts (so that adds a little weight in front of the C.G.) and the receiver is a 2000mah pack placed just behind the engine. Ss I'm curious what other people think and how did their Spitfire fly?

Thanks for any helping comments.

Use this CG calculator, it's easy to use and it will give you the exact location for the CG for any size RC aircraft. https://rcplanes.online/cg_calc.htm

I thank you for giving me the link to this website. I'll try to do this when I have a day or two to spare so I get all the right measurements. LOL Actually, I will try this out and see what the result gives me. Thanks again.