This can be particularly significant when flying over inhospitable terrain or over water - particularly at night or in IMC conditions. One of the most obvious of these is that should you be unlucky enough to experience a major engine malfunction, the other engine should carry you safely to the nearest suitable airfield. DescriptionĬonventional light twins have many significant advantages over their single-engine counterparts. V y se - Best rate of climb speed with a single operating engine in a light, twin-engine aircraft - the speed that provides the most altitude gain per unit of time following an engine failure. V mca - Airborne minimum control speed - this is the minimum airspeed at which directional control can be maintained under the following conditions: maximum gross weight, center of gravity at the maximum aft position, sea level, flaps set to the takeoff position, landing gear retracted, operating engine developing maximum power, critical engine failed and windmilling, a maximum of 5 degrees of bank towards the good engine. V mcg - Minimum control speed on the ground - the minimum airspeed at which the aircraft is directionally controllable during acceleration along the runway with one engine inoperative, takeoff power on the operative engine(s), and with nose wheel steering (if installed) assumed inoperative. For the purposes of this article, twin engine centre-line thrust aircraft are not considered Additional Definitions Light Twin Engine Aircraft - A twin engine aircraft under 5700kg MTWO. In layman’s terms, a wing mounted engine has failed. Asymmetric Thrust - An asymmetric power condition which exists when the net centre of thrust of a multi-engined aircraft is laterally displaced from the net centre of drag.
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