Re:Boom has orders for 76 of its future supersonic passenger...
by WalterBright on Sunday October 22, 2017 @10:56PM
(#15530366)
Wikipedia says that the F-22 is able to supercruise without afterburner, using turbofan engines. This may be the key.
Re:Boom has orders for 76 of its future supersonic passenger...
by techdragon on Sunday October 22, 2017 @11:29PM
(#15530501)
Supersonic capable turbofans that are able to get the "force multiplier" of using bypass airflow for thrust at supersonic speeds are honestly the key enabling technology here.
Re:Boom has orders for 76 of its future supersonic passenger...
by ddalex on Monday October 23, 2017 @12:15AM
(#15530675)
So basically a supersonic turbofan is a SCRAMJET behind the first fan?
Re:Boom has orders for 76 of its future supersonic passenger...
by techdragon on Tuesday October 24, 2017 @05:22AM
(#15540302)
Not being an expert on supersonic turbofans, I went to the obvious first information source and it was surprisingly illustrative. https://en.m.wikipedia.org/wiki/Turbofan
From a little further reading it seems it seems that supersonic turbofans are actually just the apex of the continued sophisticated work being done on jet engines which has allowed them to push the intake fans of low bypass turbofans up to supersonic airflow speeds.
As for aerodynamics, the F-22 is relatively efficient at high subsonic speed and also doesn't require external tanks like earlier jets do.