open combat rules

[watnsee]

I know the length on the muffler is 8" but exactly how is that measured? thanks

[J_R]

I suspect you just measure the entire length of the muffler, including header pipe (if any).

Steve Kaluf is the AMA Technical Director, and part of his responsibility is to answer questions on competition rules. Either call him, or e-mail him at skaluf@modelaircraft.org to get a difinitive answer.

[watnsee]

thank you much.