Proctor 48" span states .48 to .70 or .70 4 stroke... I was looking at the magnum .70 (or maybe .72) 4s and it has gotten good reviews here. I am very proficient with my aileron trainer.. and building a 4star .40 (almost done) to fly faster, simple aerobatics, etc. and I'm itching to get into WWI scale... I know these a squirly with the short tail moment and groiund handling is rough.. but I may have to take the leap. Don't see many of these at the field!
Mike