“E-I-E-I-O”: That's what 6-year-old Roman Heilman said when he spotted the horses that would carry him to safety after spending two days missing in the woods of eastern Kentucky.
The boy, who has autism, emerged from the bushes with his dog following a massive search involving more than 300 volunteers.
E-2 has achieved steady expander cycle mode.
In this test video, 30 seconds of expander cycle mode are demonstrated on the tail end of an 80-second test fire that began in Ox-Rich Staged Combustion (ORSC) mode. In expander mode, thrust was reduced from 23,000 lbf to 6,500 lbf, corresponding to a 28% throttle setting.
To our knowledge E-2 is the first kerolox rocket engine to demonstrate a transition from ORSC to expander cycle operation on the same hardware during a test fire, thanks to our LOX cooled combustion chamber. This low throttle capability could be useful for landing burns by reducing thrust to weight ratio and providing greater flexibility to correct deviations from the planned landing trajectory.