Start off by copying the data from the Comanche or some other helicopter, and then edit the stats bit by bit until you have what you want. Locomotor settings are particularly important.
BTW Why do you have me in your location? Am I your idol or something?
Well start off by editing the non-model stats first, and add the new model last. That way you know that when you get errors or strange results later you're not getting them because of some code mistake, but that it's all down to the model.