No strobe needed for "Wagon Wheel" Reverse Rotation effect

[David Chapman]

Hi Bob,
I'm having some trouble buying in to your explanation. If the eye
sends info in discrete blocks, does it transmit them with such
regularity that a strobe effect is even possible? And, would you know
at what rep rate an average person's eyes has?
I would have expected to have heard of this effect before, which is the

But Miller accounted the full-turn effect =E2=80=93 maybe in his
own way, and you account the full-turn effect with an outward
elegance. But Miller also selected the systematic error, but on
the other you introduced the error of the first turn is
subtracted from the data of first turn contained errors and
masking effects the same as others.

Subtracting, you on one hand as if selected the systematic
error, but on the other you introduced the error of the first
turn into the data for markers 180 degrees apart.

This gives 8 , and 8 independent of differences in ), shown in
Fig. 10 >>, you proceed from the idea that Miller had to obtain
ideal . Factually such symmetry is basically impossible, the
more that the degrees of turn have been measured not with the
accuracy you would need.

 

[John Woodgate]

But Miller accounted the full-turn effect =E2=80=93 maybe in his
own way, and you account the full-turn effect with an outward
elegance. But Miller also selected the systematic error, but on
the other you introduced the error of the first turn is
subtracted from the data of first turn contained errors and
masking effects the same as others.

Subtracting, you on one hand as if selected the systematic
error, but on the other you introduced the error of the first
turn into the data for markers 180 degrees apart.

This gives 8 , and 8 independent of differences in ), shown in
Fig. 10 >>, you proceed from the idea that Miller had to obtain
ideal . Factually such symmetry is basically impossible, the
more that the degrees of turn have been measured not with the
accuracy you would need.

Another pesky robot!!!! Take no notice.

 

[redbelly]

Another pesky robot!!!! Take no notice.

John, thanks for confirming my suspicions.

Mark

 

[Bill Beaty]

Another pesky robot!!!! Take no notice.

Weird.




Hey, two more interesting effects:

A car behind me in the adjacent lane was close enough that I could
observe one hubcap in the rear-view mirror. I could see a very obvious
stroboscopic effect, and the entire hubcap appeared to be rotating
slowly. But at the same time there was no strobe effect when the same
hubcap was viewed in the side mirror. The road was rough enough that
the rearview mirror was vibrating, and tiny bright highlights on
objects appeared as short lines rather than points. But the side view
mirror didn't show the same effects.



While I was passing a truck with the rising sun exactly behind us,
there was a completely unmoving shadow of lug nuts visible on the inner
surface of the truck lug nuts. An accidental Zoetrope! The Zoetrope
was formed by the slots between lug nuts, so when the wheel spun
rapidly, sunlight shining between these slots was swept in one
direction while the lug nuts on the other side of the circle were
moving in the opposite direction. Oddly, the lugnut shadows on the
wheel showed about twice as many lug nuts as there should have been,
and they appeared squashed (so the shadow of each nut looked tall and
narrow.)

Using my spinning disk with stuck-on nuts, I see a similar effect when
I hold the edge close to my eyes and look through the spinning slots.
I see blurry images of the nuts on the other side of the circle, and
they are sitting still. They do appear to be rotating in place
though!

((((((((((((((((((((((( ( ( (o) ) ) )))))))))))))))))))))))
William J. Beaty Research Engineer
[email protected] UW Chem Dept, Bagley Hall RM74
[email protected] Box 351700, Seattle, WA 98195-1700
ph425-222-5066 http//amasci.com

 

[Paul Hovnanian P.E.]

Nah. Its probably some trucker with a set of spinning rims on his rig.
;-)

 

[jasen]

But why would the trick be common enough that anyone would notice it?
Maybe one of them got chewed out by the boss, and now it's a
boss/worker power game about whether they can get away with making the
drift pattern. To cause enough patterns to be noticed, the game would
have to spread to other garages of course. Such things do happen,
although it's not common. Or it might just be indie truckers who
service their own vehicles and use tire irons (they probably don't all
own air tools!)

Air wrenches are cheap! Think of a number and halve it, twice.
Compressed air is no problem: trucks have on-board compressors
for the brakes.

Until someone comes up with a simpler explanation, the
bizarre-yet-workable explanations remain high on the list. AHA!
What if a trucker has to replace a flat?!!

unless they're an owner operator they'll probably be calling a tyre guy.

Bye.
Jasen