Originally posted by Retro
. Really there is nothing all that deep dark and secretive about the project. ...
To me it appears to be another X-plane to test TBCC and fixed inward compression inlets not a strike plane. It makes use of RATLERS tech which is
good. However turbine TBCC has very slow acceleration except for KLIN cycle. Rocket RBCC is much more efficient. This is just a stepping stone. If it
was hydrogen or methane fueled RBCC LACE M12 then it would be a quantum leap. So go chill, get a grip . . . its certainly interesting and cool but not
all that deep dark and secret.
We aren't talking about quantum leaps, we are talking about a real-life application of TBCC (Turbine Based Combined Cycle) to achieve low hypersonic
speeds for a real medium to long range aircraft.
This technology borrowed from the FALCON program may not be an unacknowledged "black" project but it is an SAP just the same.
Suffice it to say that this is what the SR-71 with it's J58 TBCC engines would probably be if it was developed today instead of 40 yrs ago.
As for acceleration, the J58 seemed to accelerate at an acceptable rate - and so there's no reason to believe that the FALCON's TBCC technology is
any less efficient.
In regard to your mention of KLIN cycle; on the J58 a nitrous oxide injection system had been developed to decrease the operating temperature and
increase the thrust, thus negating the need for a KLIN cycle, should there be a need for improved acceleration.
If that was 40 yrs ago, then the developments today should provide far better results, meaning no KLIN cycle would be needed with the FALCON tech on
the new SR-72.