Help needed understanding turbojets and airplanes

On Fri, 19 Jun 2009 14:52:42 -0700 (PDT), es330td
wrote:

Nicolas Charmont equipped a Cri-Cri homebuilt with two AMT Olympus
turbojets each producing 51 lbf of thrust that were originally
designed for model airplanes and it flies at 130 mph. I have since
read about another company, FTT (www.fttinc.com) that has an engine
for UAV's producing 37 lbf of thrust, with models producing 100 and
250 lbf under development. This made me wonder how much plane could
one usefully fly using 1 or 2 of the 250's. In comparison, I know the
VLJ market uses the Williams FJ22 (or similar engines) producing
550-700 lbf or more of thrust.


last time I looked a williams engine started at half a million
dollars. disincentive enough for most of us.

the cri cri with two turbojects etc etc sounds interesting. however
ask what it's fuel endurance was. ....any takers on 18 minutes?

there is a model jet engine made local to me which is rebadged and
sold all over the world. suave piece of kit. fuel consumption is
triple that of an O-200 for far less thrust.

you could indeed put a jet on a cessna 172 but where would you go with
so little range?