4 ms·
Isn't the windtunnel test completely different from actual conditions? Mach 7 at 1 bar is wildy different than Mach 7 at very low pressure, isn't it? My gut fe
by fainpul 1y ago
Isn't the windtunnel test completely different from actual conditions? Mach 7 at 1 bar is wildy different than Mach 7 at very low pressure, isn't it?
My gut feeling tells me the paper plane doesn't have enough mass to "power through" the thickening atmosphere with enough force to substantially heat up.
Also, if it starts tumbling or not is not very relevant, it's still flying. Surely it could recover at some point, maybe at low altitude with higher air pressure and random turbulences.
- im3w1l 1y agoJust minddumping here but I think that basically high velocity is bad because it leads to high friction and high temperatures. Velocity has two components, downwards and tangential. Tangential velocity is both good and bad. It increases velocity, but it also makes the trajectory more orbitlike, with less downwards acceleration. A gliding plane will both fall slower both due to the above, but also because thats just how gliding works. But if it tumbles it will not glide.
- deleted 1y ago[deleted]