Van Horn Aviation has completed the initial detailed design drawings for development of an all-new composite main rotor blade for the MD 500 in accordance with an agreement signed between VHA and MD Helicopters in September. VHA will design, build, test and certify the composite rotor blades, which will fit MD 500D, E and F models. VHA personnel have already begun building prototype blades and will have the blades available for display at Heli-Expo 2011.