ive had 4 byron f16 and 2 enforcers still got one enforcer>>> os91 ducted fan engine in it flys great>> jets are like who can get the best>>why do we need a permit to fly turbins>> i flew one with out the paper work for yrs now just go to the desert and fly>>i dont keep my head in the clouds and show people i got paper work to fly turbins>> and iam 83 this month>>