In article ,
"DanG" wrote:

Sorry, Joe. The snap comes totally from the thumb and forefinger
holding the non hook end of the stick. By squeezing the end, you
squirt the stick into the tube with a resounding snap. Nothing to
do with the hook, the rubber band, or anything about air pushing
or pulling. Great project to make one that is convincing.

How would squeezing the tube have any such effect? It would pinch the
stick and stop it from moving. Nor is tube pinching seen in the video.

Joe Gwinn


~~~~~~~~~~~~~~~~~~~~
DanG
Keep the whole world singing . . .


"Joseph Gwinn" wrote in message
...
In article ,
"DanG" wrote:

The change of direction has to do with killing the vibration on
one side of the stick or the other. Nothing to do with angle
of
ribs, balance of propeller, etc.

I do not know a technical physics answer for the phenomenon. I
have made many for give aways and kid things. Lot of fun to
perplex "smart guys". Another favorite to make is a "snapper".
You tube:
http://www.youtube.com/watch?v=XVKJh...eature=related

Watch the video carefully. The first guy is plugging one end of
the
tube with his finger, while the second guy is not. The talk of
hooking
to the rubber band is misdirection. The rod fits the tube
tightly
enough that air provides the spring.

Joe Gwinn