It was quite quiet lately about XCOR. Now they have tested a new kerosene engine with 2.5 x higher chamber pressure (still heat sink mode though):Bruno,
http://www.xcor.com/XR4K5-firstfire.html
Do they use pump feed now? At least for the Xerus, pressure feeding @ 50-60 bar isn't very economical anymore.
Bruno
We always run our engines in heat sink mode at first. And we continue to work on the pump. Build a little, test a lot.
Aleta
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