Thanks guys - my zooming around the street already taught me that thing about the torque pulling it to the left, but I do appreciate the info anyways - Today I wanted to try and fly it but it's so damned windy here right now so I'm waiting - I got the TT50 tuned up right - The crank shaft is a little shorter than an airplane engine - after all this one was made for heli's, but with a little sanding down of the mating surface on the prop the nut got all the threads on it - since the wind was in my favor - I pulled it off the ground about 3 or 4 inches then set her back down gently - I'm confident I can fly it - I'm just waiting for the right conditions - I don't need to be worrying about 20 MPH gusty winds on my first flight - I am flying my new Firebird commander around though - It's really easy to fly and it's tough anyways - I'll post info about my first flight when I get there!