The Beech B-76A “Duchess” is a light twin-engine aircraft operating under a Standard Airworthiness Certificate. It is capable of carrying two passengers with a flight crew of two. It has two Lycoming O-360 piston engines producing 180 HP at sea level. The maximum takeoff weight of the Duchess is 3,900 lbs. NTPS uses the B-76 for Performance and Flying Qualities flight test instruction.