"Gig 601XL Builder" wrDOTgiaconaATcox.net wrote in message
...
So you've answered your own question (though I thing Grumman answered it
for
you) as to why we don't all replace props with jet engines.

As a side note, there is a guy who has put a small turbine engine on a
motorcycle... It drives the rear wheel instead of using thrush pushing
against air... Even on something that light, it only gets around 4-10 mpg...
Of course, you end up with over 300 hp in a 500 lb motorcycle though...