"MattWriter" wrote in message
...
The linear aerospike engine, IIRC, was completely and successfully
ground-tested

I remembered reading that, while it worked, the power and T/W were less
than
hoped for. Can anyone clarify?

I recall a note in AvWeek placing the Isp at something like 285. Not what I
expected at all from a full cryo engine.

-Kim-