RE: OS 91FX vs 75AX
Thanks Bax,
I had an OS 50 SX-H on my UCD and it could hover it but no pull out.. This summer I wrecked the UCD and put the heli engine on my OMP profile Edge which had an OS-46. WOW - what a great combo!
According to Tower Hobbies and the OS website the OS-75 weighs 20.39 oz w/o muffler - so I am not sure where you get 14.29. I hope your number is correct! Can you verify that?