The Return of the most infamous HB thread of all time... :D

[gn7]

Can a man pull one of your train cars with his teeth if the track is level? If so how can this be, the train weighs TONS...

Myself and one other person moved 2, 35,000 lb chillers on a gantry crane 50 60 ft at the Glen Canyon dam a few years back. Hardest part was stopping them, not moving them.


Lets take Tish's imaginary plane and change it up a little. Lets hang it from a continuous beam, on a cable to a beam trolley. Now any 5 year old can move the plane on the beam. Easy. Now start moving the beam, as fast as you care to. All the planes prop has to do, is over come the friction of the beam trolley to reamin still. Its not much. To move forward, it only has to produce more THRUST than it takes to hold it still while the beam moves.
The "effort" the plane needs to put up to remain still while the beam moves is so low, it could be held in position by one person with a rope. Its only the friction put up by the trolley wheels, which very little. If you can move the plane, you can hold the plane.

You see, Tish wants ALL the thrust to equal ALL the friction, and thats fanatasy. Its bench racing at its finest.
He isn't applying any real physics to his mind game, just what he sees in his mind. It seems plausible to him, therefore, it is.