As the other guys said, just keep the gas bottle warm inside the car or as we do inside our thermo suits. And don't use the on-board gas tank as it will quickly cool the propane gas down. Just connect the the tube from the warm gas bottle directly in to the engine or propane valve.

Also remember to have some condense remover like Isopropanol in your retract air system to prevent freezing in sub zero temps. Do this at home before you fly and cycle the gear a few times to get it out in the retract cylinders. That will remove any condense from your air system and then it can't freeze. Also remember to use a condense remover that is made for use in air systems. This one will not dry out the O-rings.

I have not experienced any other issues with using turbines in cold weather. The coldest temperature I have ever flown in was -20c, and I can tell you that you get a lot more power from your turbine in that temp compared to what you get at +25c in the summer.

Good luck, and remember to warm your frozen fingers in the hot exhaust before you fly[sm=thumbup.gif]