Originally Posted by
Smilin_Ed
Re directing the exhaust forward is accelerating it in the opposite direction. That acceleration (A) is the same as in F=MA which produces a force (F). That force slows the aircraft.
No argument there. But the OP appears to be suggesting that there are two separate effects that contribute to the net reverse thrust:
Originally Posted by
pattern_is_full
They not only redirected the engine exhaust forward, but the exhaust was also pushing backwards on the clamshell as it was redirected
There aren't two lots of F=MA going on here.
