Hi Bill, So I am doing this with a G13BB first because it just to happens to be what I have at my disposal. I will go ahead and play around with that and make a gearbox for it. 4140 shafts, nitrided gears, etc.You are doing props and PSRU for the G13BB? Cool.
Having the same base engine, rpm range, and flywheel inertia is essential if you are doing resonance checks and durability runs. Induction and ignition only matters in that you need to make at least the same torque over the same rpm range that the flight article will have.
So, are you preparing to build a firewall forward on the G13BB? Are you going to leave us hanging on plans until you have something that begins to pass your tests, or are you going to run you program with us watching?
I will run the program while you guys can watch. I'm quite interested in doing this and something tells me that others are interested in seeing how it turns out. If anything, it will make for a really good college project, successful or not.
I will say that I would ultimately like to apply this to larger displacement V8 engines. Something that can throw enough power to easily qualify an aircraft as high performance. That's years away, but that's where id like to go.
Perhaps the old-timers at my airport will change their minds, too. They are convinced that car engines in planes are a terrible idea all because they heard someone having a PSRU grenade on them. I understand their reservations, but I don't believe it's giving the technology a fair shake.