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jfsimon1981

X-Plane Fan
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  1. Good day, As far as my understanding is, the PA-23 might have be designed with a certain max normal cruise speed lying in the region of 150 kt. Given what seems saying the airfoil, past below alpha zero degree, the drag coeficient 'jumps', hence it would be difficult to accelerate beyond this IAS (flight characteristics rapidly decreasing above). The Eagle aircraft is based on a simple airfoil NACA 2412, I checked its L/D is 9.0 at max cruise, which is relatively high and optimistic on purpose so that the aircraft is quite versatile. There is a good chance the Apache had better low speed characteristics, the Eagle is also much lighter aircraft with a design empty weight 1900 lb hence most flights cab ne performed well under a PA-23's weight. Regards, Jean-François
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