Large order for Aerojet Rocketdyne's RL10C-X engines
(11 Apr 2022) United Launch Alliance (ULA) recently awarded the largest RL10 contract ever to Aerojet Rocketdyne to deliver 116 RL10C-X engines for its Vulcan Centaur rocket.
The new engines will support ULA as it works to fulfil its commitments under a contract they recently received from Amazon, as part of the largest commercial launch contract in history, to support the launch of its Kuiper satellite constellation.
The RL10C-X uses a 3D-printed main injector and main combustion chamber, as well as a 2.39-m monolithic lightweight composite (carbon-carbon) nozzle. The specific impulse, or Isp, of the RL10C-X is 461 seconds, which puts it near the very top of the RL10 engine family in terms of performance. Similar to gas mileage in a car, specific impulse measures the amount of thrust generated by a rocket engine per unit of propellant consumed per second.
The RL10C-X engine is designed, fabricated, assembled and tested at Aerojet Rocketdyne's facility located in West Palm Beach, Florida. Well over 500 RL10 engines have flown in space during nearly six decades of operation. The RL10 engine currently powers the upper stages of ULA's Atlas V and Delta IV launch vehicles, and will soon begin supporting ULA's Vulcan Centaur and NASA's Space Launch System.
Reference: Aerojet Rocketdyne PR