The Beta 1 rocket engine was used on the development model of a British vertical take off and landing (VTOL) interceptor aircraft. Its two combustion chambers burned a fuel mixture of methyl alcohol and hydrazine in hydrogen peroxide. Its design was heavily influenced by the German Walter 509 engines captured during World War II.The German code name for hydrogen peroxide was T-Stoff. This close-up photograph shows the words 'T Stoff Inlet' in capital letters on the engine's main peroxide valve.
© Science Museum / Science & Society Picture Library