Chronology Current Month Current Thread Current Date
[Year List] [Month List (current year)] [Date Index] [Thread Index] [Thread Prev] [Thread Next] [Date Prev] [Date Next]

Re: angular momentum transfer?

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.
>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!