With regard to the Delta Glider, I'm curious as to exactly when one would use the SCRAM jets, since they only seem to work below 30 kilometers in altitude or so. Also you need to be traveling at a velocity of at least Mach 3 before you can engage the jets. But to reach Mach 3 you have to use the main rockets anyway.
I've been curious to see exactly what the SCRAM jets can do, but I can't seem to reach Mach 3 without reaching such a great altitude that air-breathing engines don't work very well.
So I guess I really have two questions: (1) How can I reach Mach 3 but still be low enough for the SCRAM jets to work, and (2) more basically, what exactly are they for?
I've been curious to see exactly what the SCRAM jets can do, but I can't seem to reach Mach 3 without reaching such a great altitude that air-breathing engines don't work very well.
So I guess I really have two questions: (1) How can I reach Mach 3 but still be low enough for the SCRAM jets to work, and (2) more basically, what exactly are they for?