Wondering what the best engine/fan combination is for the Red Arrows Hawk ARF (by AMD). I believe they suggest an OS 46 VXDF (with the Turbax Fan), or with slight modifications, an OS 91 (with a Dynamax unit). It appears to be a fairly large plane (53" wingspan) .... is the OS 46 VXDF/Turbax combination powerful enough ? ? Thanks. Bob