And like the earlier post, it needs to already be up to that speed before it is effecient
How did it get to that speed?
FUEL and TIME
“How did it get to that speed?
FUEL and TIME”
That’s true.
But you didn’t read my post. It’s launched from an aircraft cruising at high speed (i.e., supersonic). The aircraft spends its fuel and time to get up to speed, then kicks off the missile scramjet engine.
Fuel usage is not a concern with this missile concept. It’s all the other stuff that comes into play that makes it extremely difficult to develop.