On 11/21/2017 01:57 PM, Carlos E. R. wrote:
Ah, those things make sense. Helium has lower friction than other gases like nitrogen.
Still some "gas friction" is needed, or the head would crash with the surface. Like an airplane.
Ah, I don't you need friction to generate aerodynamic lift. An aircraft would still fly through a friction-less atmosphere, thanks to Daniel Bernoulli. Granted, a flying disk head "might" not use Bernoulli, it might maintain its altitude by virtue of the ram effect. (gas rammed into the media/head gap giving it a cushion) This can be noticed in aircraft when they're landing and is called "ground effect". Am I all wet again? Regards, Lew -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org