My, my, we do seem to be getting confused!
Originally Posted by PBL
There is also the mass of accelerated air which passes just outside the cowl, which will be arrested in the x-direction by the reverser exhaust. That loses momentum also, so that is going to enter the momentum-loss equation too.
Originally Posted by Guppy
No, it's not.
Oh, yes, it is!
(And the response is.....?)
Originally Posted by Guppy
The perception that diverted fan or exhaust gasses cause a "wall of air" which somehow serves to slow the airplane down is largely a myth.
Yes, I seem to remember someone saying something like that earlier in the thread. Who was it now? Maybe...
Originally Posted by PBL
This business of a "disc of air" generating some kind of resistance seems to me to be poppycock. As usual, being a bit familiar with basic physics helps enormously.
Your suggestion about ships was that you needed to change the laws of physics to get a self-blown sail to work. It took me a minute to think of two designs where that would work. If it takes you longer than a minute, we may conclude that I am better at aerodynamics than you are.
Concerning blown wings,
Originally Posted by PBL
It would work for airplanes also......
Originally Posted by Guppy
No. .... find an airplane where [that] happens.
Does this count?
Powered Lift: Novel GTRI Design
If not, why not?
PBL