RepoArt

aReEeAyeDeeAyeBohok (Tuesday 25th of November 2008 06:23:50 PM)

downhill really? so it's losing energy right

johntyle716 (Sunday 23rd of November 2008 07:51:12 PM)

ya i cant believe you guys did not catch this the windmill thing would be turning propelling wind behind it from the natural force nut the only reason that white flag is moving backward is because the windmill is making it.

subductionzone (Thursday 20th of November 2008 12:43:22 PM)

I have to admit I was wrong on a previous comment. This is possible, check out the smaller scale models posted by spork33. It runs off the difference in speed between the wind and the ground. Do not think of the wind blowing directly on the cart and it might help. Since it works off of a difference in wind speed it would no work if there was no wind. There is no perpetual motion or over unity involved.

jamesdl00 (Tuesday 18th of November 2008 10:31:13 PM)

dynamic soaring - it's already been done by birds (the albatross), model aircraft, and full size aircraft!

jamesdl00 (Tuesday 18th of November 2008 09:20:02 PM)

I think "likely" and "unlikely" applies only to random events. Engineering either works or it doesn't. This is not the only type of contraption that can move downwind faster than the wind.

jamesdl00 (Tuesday 18th of November 2008 09:18:17 PM)

Yeah, every time I sit in a calm wind-free room, the floor rushes by underneath me too.

molinarok (Friday 21st of November 2008 03:02:03 PM)

But how is sitting in your room the same as moving on the road with a wind? You forgot where the analogy begins. People, it's not the speed of wind vs speed of vehicle that matters. It's speed of wind vs speed of road. That's what matters. And in both cases the difference is there. If you insist on sitting still in a room with no wind, there is no source of energy and it's not the right situation to talk about.

jamesdl00 (Friday 21st of November 2008 03:47:47 PM)

I agree with you completely, but you misinterpreted my somewhat sarcastic post. I was replying to gamesguru who incorrectly states that this is not possible and that from the inertial frame of reference of the cart, it is like sitting at rest in a still room. When the cart is moving at the speed of the wind, the apparent wind is 0, but gamesguru fails to consider that at the same time the apparent movement of the ground going by is certainly not 0.

VideoJunkie666 (Thursday 13th of November 2008 04:47:06 PM)

No. It would be identical to the contraption sitting on a moving treadmill in a calm, wind free room. See the video response above.

davidglover (Thursday 6th of November 2008 06:39:45 AM)

I love how much controversy this brings, sounds like it is time for the MYTHBUSTERS to weigh in.