RL10C – Spaceflight Now

June 22, 2026

Breaking News

[ June 22, 2026 ] NASA’s Nancy Grace Roman Space Telescope arrives in Florida Falcon Heavy
[ June 20, 2026 ] SpaceX to launches 24 Starlink satellites on Falcon 9 rocket from Vandenberg Falcon 9
[ June 18, 2026 ] SpaceX launches intelligence-gathering satellites for the National Reconnaissance Office Falcon 9
[ June 17, 2026 ] Arianespace launches its heaviest payload to date with Amazon Leo flight Ariane 6
[ June 16, 2026 ] SpaceX launches 3 Block 2 BlueBird satellites for AST SpaceMobile Falcon 9

Aerojet Rocketdyne, ULA mark 60th anniversary of RL10 rocket engine

November 28, 2023 Will Robinson-Smith

A rocket engine with a long pedigree marked a big milestone on Monday. It’s 60 years since the hydrogen-fueled RL10 engine debuted onboard a Centaur upper stage launched from Cape Canaveral on Nov. 27, 1963.

Record-setting Atlas launches with new Centaur engine

December 13, 2014 Justin Ray

A United Launch Alliance Atlas 5 rocket put on a display of power, sound and light Friday evening at Vandenberg Air Force Base in launching a clandestine national security payload, then successfully debuted a new upper stage engine as it flew over the horizon.

Atlas 5 to sport new upper stage engine Thursday

December 8, 2014 Justin Ray

The most powerful Atlas rocket to ever fly from the West Coast is poised for launch Thursday to deliver a secret payload into orbit while debuting a new upper stage engine.