-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Monday, 2013-09-16 at 17:05 -0400, James Knott wrote:
jdd wrote:
I once saw the head-clearance challenge described as not unlike trying to fly a Boeing 747 at 600 knots half-an-inch clear of the ground ...
thery do this each time they land or take off :-)
I doubt you'll see many 747s taking off or landing at 600 knots. ;-)
You can not land at that speed - dangers aside. Suppose there is no wind, no turbulences, that the land is absolutely horizontal and smoth. As the plane aproaches the land, there is a surface effect that impedes the plane from ever touching land. It has to push hard the control surfaces to go down, and I guess it would be impossible at that speed. Which is the same trick the hard disk heads use ;-) The plane, or the head, need a comparatively strong down force to make them touch down at those speeds. Of course, those forces exist... - -- Cheers, Carlos E. R. (from 12.3 x86_64 "Dartmouth" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (GNU/Linux) iEYEARECAAYFAlI3hf4ACgkQtTMYHG2NR9VuPwCfbP12jm7bkdY5Tzqh5o97xe4F ybIAnRVoyjC0Vy3o4Cg8A33kQE1SNIzQ =tlc5 -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org