David, I know that this is an incredibly old thread but that just means that by now you know everything that there is to know about these right? I just picked one of these up locally at an RC auction. I know very little about them, is there anything that I need to know before I attempt to fire it up? I've read they are underpowered with a 61 and a tuned pipe, is this accurate? Might you have a manual or documentation on set up that you can hook me up with? There was not one with the aircraft when I purchased it.
Scotty68

My new/old Whopper.