[hharney]

The original first engine mod was Riley Super Skyrocket. These are well proven aircraft with a valid STC. I don't know how many were converted but I would guess around 20 or so. The STC is for sale (or was) and is still a valid STC. I have spoken to owners of the Super Skyrocket and they seem to love them. Just like we love our original Skymasters. I am sure they had some quirks like everything does, even our originals.

So just to recap the discussion there are really several STC engine conversions. Riley, AirScan, Aviation Enterprises, and I probably am missing at least one. TF Hawk has their diesel conversion and it's an STC.

Mods for aircraft in the form of STC's were to improve the aircraft not to make them more dangerous. There are some really good STC mods for our aircraft out there. There may be some that were not tried and tested as others but that is another story. There are many, thousands of hours of safe flying with mods on Skymasters as well as hundreds of other aircraft.