BECAUSE of relatively high power to weight factor, general compactness with low frontal area, competitive specific fuel consumption and general ruggedness, the horizontally opposed engines manufactured by Continental Motors Corporation have been used by small aircraft over the past twenty‐five years. The manufacture of the four and six cylinder versions of these engines has been undertaken by the Rolls‐Royce Ltd, who have participated with Beagle in providing a sophisticated installation on the B.206 aircraft.