tag:blogger.com,1999:blog-8828526517567531995.post1131707370335938590..comments2023-07-03T09:11:17.147-04:00Comments on Grotus' Acorn: The Airplane on a TreadmillGrotus' Acornhttp://www.blogger.com/profile/09388437722442326725noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-8828526517567531995.post-46593677172192034362009-01-12T08:08:00.000-05:002009-01-12T08:08:00.000-05:00How about this one?If it is 29.53 days from full m...How about this one?<BR/><BR/>If it is 29.53 days from full moon to full moon on the earth, how long is it from full earth to full earth on the moon?<BR/><BR/>Think carefully before answering, it is NOT the same as the moon viewed from the earth.<BR/><BR/>One of the best questions to ask when an instructor says (unguardedly) "Are there any more questions?"Sullivan013https://www.blogger.com/profile/01835038525209475768noreply@blogger.comtag:blogger.com,1999:blog-8828526517567531995.post-988601407173808302009-01-10T14:58:00.000-05:002009-01-10T14:58:00.000-05:00Zteve,Yes, and that's sort of the point. Maybe I ...Zteve,<BR/><BR/>Yes, and that's sort of the point. Maybe I should have been clearer.<BR/><BR/>Speed over the treadmill is not the same as speed through the air. Escape velocity is the speed over the earth which results in an airspeed sufficient to generate enough lift.<BR/><BR/>As I see it, if the plane is able to accelerate at all with respect to the ground (on which the treadmill is built,) Grotus' Acornhttps://www.blogger.com/profile/09388437722442326725noreply@blogger.comtag:blogger.com,1999:blog-8828526517567531995.post-70294093165482923362009-01-10T13:18:00.000-05:002009-01-10T13:18:00.000-05:00The lift for the plane is determined by the wings ...The lift for the plane is determined by the wings moving through the air. If the wings don't move, the plane doesn't take off.Anonymoushttps://www.blogger.com/profile/16460464224141986657noreply@blogger.com