From the Jonker website:
"M&D decided that rather than convert a model aircraft jet turbine into a glider sustainer, it would be better to develop and certificate a new engine."
I've been on an airliner that has had a major in-flight system failure. It happens to everyone.
Jim

On Tuesday, July 7, 2015 at 7:07:20 PM UTC-7, wrote:
And.......they are still derivatives of model engines made by model engine manufacturers. We're not talking GE or Pratt & Whitney here