RE: Build your own PBF (Pizza Box Flyer, Flying Pizza Box)
Maybe you guys can help me out. I just got 2 engines and do not know anything about them. One is a HP 40 black case with a gold head. The other is a Irvine 40. They both have great compression and the guy said they had only been on starting blocks. Let me know if you guys know anything about them.
The HP is made in Austria and the Irvine is made in England.