I don't know about the Pegasus, but there are a number of very small turbojet engines out there. They're a little pricey, starting at around $2000, and are used in flying scale models of jet aircraft.
I don't know about the Pegasus, but there are a number of very small turbojet engines out there. They're a little pricey, starting at around $2000, and are used in flying scale models of jet aircraft.