Originally Posted by anotherT34C
Did you do the narration on the video? Seems pretty grandiose for demonstrating the principle of "motor and propeller".
Call it what you wish, but something like 95% of folk conclude that DDWFTTW is impossible. Is spite of the fact that it's a simple sailing device, that percentage holds true even on a sailing forum such as this. It's a physics brainteaser that confounds people from every walk of life, education and interest level.
You can call the video "grandiose" if you wish, but remember that that video was created and submitted as a 'sales pitch' to the MythBusters and was successful in it's purpose. There's no question that marketing
is different from education -- that's a point I would absolutely concede.
Just to be clear on the "discovery" accusation you leveled, we've been flawless in our credit to others.
Pop quiz from our MythBusters Video --
-- What's the first picture you see on the screen
? (Bauer Cart from '60s)
-- How many seconds into our video is it before we state that others have done it? (75)
-- In the video which cart is first shown operation? (not ours)
-- Which cart do we say inspired us to build ours? (Goodman's)
-- Do we say we designed our small cart or do we toss credit to someone else? (someone else)
We throw credit around like Christmas
candy and again, make no claim of "discovery".
[/quote]As for different principles, what's the direction of propeller
rotation on the street cart relative to the treadmill cart (essentially a windmill)? What does this tell you about the forces involved?[/quote]
You've really got to get this 'there's a difference between the cart on a treadmill and the cart on the street' out of your head
. I don't know how else to say it other than ***THEY OPERATE IDENTICALLY***
Same gearing, same prop, same prop rotation, same physics. Every design and every cart we've build (over a dozen different ones now) and each one others have built have been run inside and out with NO changes.