Perhaps a stepped frame video where random numbers are
used to select realistic alterations to the parts of a
model between frames would be appropriate. Can I talk
myself or anyone else into it?
On Wed, 7 Mar 2007 02:16:51 +0100
"Michel Jullian" <[EMAIL PROTECTED]> wrote:
Or, even more simply, _experiment_ with macro size
bouncing balls and a macro size multiple pawl ratchet
wheel, and shake the solidarized boxes randomly to see if
you can get the axle between the two boxes to rotate
consistently in the right direction.
This should give a correct yes/no qualitative result
shouldn't it?
Michel
----- Original Message -----
From: "Michel Jullian" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Tuesday, March 06, 2007 7:03 PM
Subject: Re: [Vo]: multiple pawl rotational rectification
At first sight multiple pawls would seem to go around
the "bug" in feynmann's original ratchet indeed, but it
remains to be verified (a simple 80's video game like 2D
simulation with classical bouncing balls in the two boxes
might do the trick).
Michel
----- Original Message -----
From: "Stephen A. Lawrence" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Tuesday, March 06, 2007 3:49 PM
Subject: Re: [Vo]: multiple pawl rotational
rectification
Charles M. Brown wrote:
Feynman's ratchet used one sprung pawl on a ratchet
wheel. The spring
biases the pawl towards the ratchet wheel so mechanical
pressure on the
gentle slope of the ratchet wheel drives the wheel the
wrong way where
it can rest against the sharp or even overhanging slope.
If the pawl is
then lifted by Brownian motion and the ratchet wheel
moves a little the
wrong way when the pawl is high, possible 50% of the
time, than the
wheel will rotate the wrong way. If the ratchet wheel
moves a little the
right way when the pawl is high, possible 50% of the
time, then the
pawl will return to a low part of the gentle slope near
the sharp slope.
If there are many pawls on one ratchet wheel than they
do not have to be
biased by springs because the probability is high, and
increases
exponentially with the number of pawls, that at least
one pawl of a
similar position group will be in position to block
counter rotation of
the ratchet wheel. This type of system should behave
like a larger scale
mechanically rectified ratchet wheel at thermal power
levels.
I don't think Feynman tried hard enough to break the
Second Law.
Fabricating a device that fails with inadequate design
doesn't prove
that a better design won't work.
snip
Aloha
