This must be a scam. As Jed said, at the point where the craft is going
downwind at the speed of the wind, the relative wind across the propeller
would be zero so it could not accelerate from this point on. If it did, the
force from the prop would reverse anyway. Even more obviously, if it can
On Wed, 22 Sep 2010 16:01:42 +0100, you wrote:
This must be a scam. As Jed said, at the point where the craft is going
downwind at the speed of the wind, the relative wind across the propeller
would be zero so it could not accelerate from this point on. If it did, the
force from the prop would
From John Fields,
...
Note that with the wind pushing the cart and the pitch of
the propeller as shown, the wind would, intuitively, be
forcing the propeller to rotate counter-clockwise as
viewed from the rear of the cart.
However, such is not the case.
What's really happening is that
Sailboats vary enormously in terms of their favored point of sailing. I would
guess that most sailboats do best with the wind on their beam (90 deg.) My
boat is best on that point, and I can also sail into the wind to about 28
degrees without pinching, which is exceptionally. Downwind is
From Lawry,
...
I wonder what race committees will say when a sailor shows
up with this rig. Thinking of John's explanation, though,
I suppose it will not work as there won't be any torque
transmission from the wheels to the prop.
Paddle wheels!
My parrot can squawk out Steamboat Willy
Here is a pretty good description of how it works:
http://scienceblogs.com/goodmath/2008/12/the_real_bozo_attempts_to_aton.php
Ron
--On Wednesday, September 22, 2010 1:12 PM -0400 Lawrence de Bivort
debiv...@evolutionaryservices.org wrote:
Sailboats vary enormously in terms of their favored
On Wed, 22 Sep 2010 13:12:27 -0400, you wrote:
Sailboats vary enormously in terms of their favored point of sailing.
I would guess that most sailboats do best with the wind on their beam
(90 deg.) My boat is best on that point, and I can also sail into the
wind to about 28 degrees without
Interesting effects from filming propellers:
http://www.youtube.com/watch?v=Y9Px9EAhyssfeature=related
http://www.youtube.com/watch?v=Y9Px9EAhyssfeature=related
http://www.youtube.com/watch?v=T055cp-JFUA
http://www.youtube.com/watch?v=T055cp-JFUA
I do not see how this can work! They are going with the wind, so if
they start to travel at the same speed as the wind, the propeller
should stop turning.
Maybe I am missing something.
- Jed
well, their own speed would let the prop spin as drag, but it would
have to slow down eventually.
On Tue, Sep 21, 2010 at 10:26 AM, Jed Rothwell jedrothw...@gmail.com wrote:
I do not see how this can work! They are going with the wind, so if they
start to travel at the same speed as the wind,
Wouldn't you know - they even have a url
http://www.fasterthanthewind.org/
-Original Message-
From: Jed Rothwell
I do not see how this can work! They are going with the wind, so if
they start to travel at the same speed as the wind, the propeller
should stop turning.
Maybe I am
I am guessing that the propeller propels a belt/chain which is geared into the
wheels.
Lawry
On Sep 21, 2010, at 1:26 PM, Jed Rothwell wrote:
I do not see how this can work! They are going with the wind, so if they
start to travel at the same speed as the wind, the propeller should stop
On Tue, 21 Sep 2010 13:26:47 -0400, you wrote:
I do not see how this can work! They are going with the wind, so if
they start to travel at the same speed as the wind, the propeller
should stop turning.
Maybe I am missing something.
- Jed
---
Notice from the pitch of the propeller and its
On 9/22/2010 1:26 AM, Jed Rothwell wrote:
I do not see how this can work! They are going with the wind, so if
they start to travel at the same speed as the wind, the propeller
should stop turning.
Maybe I am missing something.
Yes what an interesting puzzle! But knowing that it can be done
Quite baffling. I love the amount of conjecture this tiny little
transportation device has spontaneously generated within the Vort
Collective. Nice to see that the Vort juices haven't completely
atrophied. Creative conjecture of this sort seems to have been kind of
sparse lately! ;-) I still
I think we can think of this in terms of three phases:
1. Start from a dead stop
2. Acceleration to a speed superior to that of the wind
3. Post acceleration performance
1. I am guessing that the contraption just starts moving forward because of the
push of the wind on its vertical surface, e.g.
Ah yes, it is the old mystery of capturing apparent wind.
Apparent wind is the wind that you make yourself i.e. you feel on your
face as you move forward such as on a bicycle. True wind is the wind that is
blowing naturally.
There is a long-forgotten way it could be done today, with huge OU
On Tue, Sep 21, 2010 at 3:51 PM, Jones Beene jone...@pacbell.net wrote:
Maybe the Russians are using the technique on the this helicopter, which
seems to be getting a massive amount of lift with almost no blade speed ...
cough, cough.
http://www.youtube.com/watch?v=qgvuQGY946g
Personally,
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