Warjet,

There is nothing worse than losing your bird on the first flight. Over the years I have lost a few the same way. I would like to thank the rest of you for your input. Seems to me the wise thing to do is run a lot of fuel through it on the test stand first. I don't think the 12-5 prop is a good choice for the F-20. It needs to fly FAST!!! I will post my results after the engine arrives and is run . Thank you all again.

Tony