On Wed, 06 Jun 2007 11:35:55 GMT, Ron Hardin
wrote:

...

That the turbine is spinning doesn't matter to the objection. The exhaust going
to the rear spins it up, the exhaust going to the front slows it down. Net effect,
zero. How does the exhaust keep it spinning?

The compressor in front provides a wall of air as dense as 6 times
standard pressure - so the expanding hot air behind it finds it
energetically advantageous to go backwards, which reinforces the wall
of air

Brian Whatcott Altus OK