up weight of the vehicle at lift off was about . Because of the limited gain change abilities of the autopilot, as the weight of the vehicle fell the corrections applied by vectoring the engines were more vigorous; at lighter weights and even on ground tests the engines were seen not to be entirely rigid as the mouth of the chamber moved slightly after the corrections were applied by the hydraulic rams. These rams were fed by hydraulic fluid at about . The dynamic pressure at the chamber mouth was about . Display examples Alongside the Blue Streak at the National Space Centre in Leicester Armagh Planetarium The Euro Space Center in Redu, Belgium. Imperial War Museum Duxford, Cambridgeshire. The Woomera Missile Park in South Australia (recovered after flight) References Rolls-Royce rocket engines Rocket engines of the United Kingdom Rocket engines using kerosene propellant Rocket engines using the gas-generator cycle