Val Cleaver
Arthur Valentine Cleaver OBE FRAeS (14 February 1917 – 16 September 1977) was a distinguished British rocket engineer. He co-authored a paper which discussed the possibilities and problems of nuclear rocket engines in 1948. After the Second World War he developed de Havilland's Sprite and Spectre rocket engines. He moved to Rolls-Royce in 1957 and in 1960 he became general manager and chief engineer of the Rolls-Royce's rocket departments, where he was responsible for the engines which powered the Blue Streak missile and Black Arrow launch vehicle. While the ELDO vehicle was ultimately unsuccessful and abandoned, the Blue Streak vehicle and its engines worked perfectly on every launch, and Cleaver was awarded the OBE for his part in developing them.