To get an invitation to Top Gun a person only needs to ask for one. we then ask for some photos of his work and ask if he is experienced in flying in front of people. If the airplane is worthy of the invitation, he gets it! Pretty simple actually. we have NO way of knowing WHO is out there that may be qualified, never have, so we rely on requests OR recommendations. As far as the turbine thing, unless I am mistaken, the first turbine model to fly in the USA was a BVM F-16 powered by a JPX, propane burning turbine. That happened at Top Gun, in W. Palm Beach in 1991 I believe.