|  |     Kay,
    
    Don't waste yer' time.  When I was a kid, Monogram had a line of
    tethered cars and boats that were CO2 powered just as you describe.
    The performance was disappointing at best; low power and very short
    duration.    
      |
      | |      00	 Adios,      Al
    |_|_|      ( >o
      |    Z__(O_\_	(The Desert Rat)
 | 
|  |     Using the C02 cartridge as a source of Jet propulsion wouldn't work too
    well.  The steel casing is very heavy, and the amount of C02 inside is
    enough to inflate a good size bbirthday baloon.
    Recently, in M.A.N. or maybe M.A., there was an article about a guy
    who's been working on C02 powered motors.  He's succesfully converted up
    to something like a .15, working on larger sizes.  The article said that
    they don't turn too fast, but have a LOT of torque.  They were talking
    about an .049 turning a 10-6 at 5000-6000 RPM, I think.  He got decent
    duration by using a larger tank, rather than a small cartridge.  The
    technology seemed pretty promising, as maybe an alternative to Electric.
     About the same power, without the added weight of a battery.  I meant
    to write to the guy for additional info, but seem to have let it slip.
    Maybe I will, now, and I'll let you know what he says.
 |