America still builds rockets

[srh3trinity]

I tried to pause it, but when it shows a shot of the exhaust, it looks like there is some linkage on the top of the exhaust tip that moves. Did I see that right? Some kind of cutout to control exhaust tone?

[6spdcamaro]

Originally Posted by srh3trinity

I tried to pause it, but when it shows a shot of the exhaust, it looks like there is some linkage on the top of the exhaust tip that moves. Did I see that right? Some kind of cutout to control exhaust tone?

Yep. There is a butterfly valve that opens above 3000 rpm

[MODO Innovations]

Originally Posted by XcYZ

WTF... is that a rat or a bunny playing the drums at the 1:17 mark?

Nope, an '84 model prototype trunk monkey.