MUSTARD (Multi-Unit Space Transport and Recovery Device)
A design for a reusable space vehicle proposed by the British
Aircraft Corporation in 1964–65. MUSTARD consisted of three fully-reusable
delta-shaped craft mated together. Two of the components served as boosters
for the third stage, which was orbital. These boosters could then be flown
back, either by pilots or remote control. Fuel could be pumped from the
boosters into the orbiter, so the orbiter could reach orbit with a full
fuel load and therefore, if required, continue on to the Moon.