During the early 1960s the company also outlined several production designs, most using twin rotors, the largest of these was the Bo 310. This design would be powered by two T55 or T64 engines, each of which drove both a Derschmidt rotor and a forward-facing propeller for additional forward thrust. The engines would be on the ends of an aerofoil section to reduce the rotor loading. Several versions of the Bo 310 were modelled, mostly passenger transports, but also attack helicopter versions. The Bo 310 would have a cruise speed of .