# gy=c *The Urth list — 1 messages, 1 voices, 26 Mar 2002* > Exported from an unofficial mirror of a public mailing list. Copyright > in each message remains with the person who wrote it. > Email addresses are obscured as `user at host`, the form the original > archive published. This file was rebuilt from parsed fields rather than > retained headers, so it is faithful in content but not byte-exact. --- ### Andy Robertson *26 Mar 2002, 12:51* ----- Original Message ----- > From: > A question. > > The Whorl of the Long Sun produces a facsimilie of gravity through spin. > Otherwise when we see it there is no other acceleration. Is there (and I > ask because I can't remember) any mention of how the Whorl behaved when > traveling? No mention. A good equation to remember for astrogation is gy = c If you accelerate at 1 gravity for 1 year you reach the speed of light - or would if not for relativistic effects. I doubt the Loganstone could manage more an 1/100 g acceleration. Even that would "raise" the front end miles above the back end, in effect. It's a big problem, but it is not a significantly bigger problem for a round trip. Maybe it was cone shaped? hartshorn ---