Re: angular momentum transfer?

[Brian Whatcott <betwys1@SBCGLOBAL.NET>]

A telling construction note for the Whimmy Diddle notes the importance
of a light thin propeller blade - so that with the anisotropic properties of
wood, across and along grain, an elongation of the central hole is
inevitable, which can phase neatly with the vibrating propeller stick
to motivate its rotation.
This mechanism does not seem really compatible with ball bearing wheels
 on a common spindle, on the face of it, unfortunately.

Brian W

At 08:31 AM 8/29/2004, you wrote:
> Brian - are you saying that the driven wheel in question CAN'T be
> producing any reciprocating motion in the axle?
>         or are you further explaining the relevance of the gee-haw
> whammy diddle?
>
>
> >At 09:09 AM 8/28/2004, Clarence, you wrote:
> >
> >>In thinking about possible coupling arrangement, I would suggest looking
> >>at the
> >  >"propeller on a notched Stick" toy.
> >  >
>
>
>
> >The Whimmy Diddle looks mysterious. But readers of this list are
> familiar with
> >the mechanism which converts reciprocating motion to rotary motion.
> >
> >References
> >1) Julius Sumner Miller, "The Notched Stick," American Journal of Physics,
> >Vol 23, 1955, pg 176.
> >2) Elizabeth R. Laird, "A Notched Stick," American Journal of Physics, Vol
> >23, 1955, pg 472.
> >3) G. David Scott, "Control of the Rotor on the Notched Stick," American
> >Journal of Physics, Vol 24, 1956, pg 464.


Brian Whatcott    Altus OK    Eureka!