Spinner strobing as a "Bird Strike Countermeasure"

On Dec 5, 9:55 pm, wrote:
In rec.aviation.piloting Harry K wrote:





On Dec 5, 2:05 pm, wrote:
What you see is a prop blade in whatever position it is in when
the light goes off.

If the light is going off every quarter turn, you see a particular
blade end in four different places each a quarter turn apart.

If the light is going off every sixth of a turn, you see a particular
blade end in six different places each a sixth of a turn apart.

--
Jim Pennino

Remove .spam.sux to reply.- Hide quoted text -

- Show quoted text -
Yes, but you will see them (along with all the others) one at a time.
Not the entire sequence at once or even a composite. It is the same
as taking a snap shot with shutter speed fast enough to stop the
motion, it will show all blades, in this case it will show two blades
and no 'virtual' blades. You can prove it with a fan and a variable
strobe light but I suspect that will not be a common kitchen
appliance .

Um, no.

Assuming everything is synchronous, you will see what appears to be
multiple blades because of eye persistence, the same reason movies
appear to smoothly move.

It is the same as taking snap shots with shutter speed fast enough
to stop the motion, and taking an integral number of snap shots
during the rotation.

Take one snap shot when the blade tip is straight up, take the
next when the blade has moved 90 degrees, the next when the blade
has moved another 90 degees, take the last when the blade has moved
another 90 degrees.

Make slides of the pictures and put them on top of each other to
simulate eye persistence.

Replace "take the snap shot" with "flash the strobe".

You can prove it with a fan and a variable strobe light.

--
Jim Pennino

Remove .spam.sux to reply.- Hide quoted text -

- Show quoted text -

Hmmm...It looks like I will have to locate a strobe and try it. I
don't recall anything like that illusion back in my physics classes in
HS but that was near 60 years ago. Just one of those things where I
have to see it myself to believe it.

Harry K

dgs writes:

You aren't only here to discuss aviation.

I try to discuss aviation, if I can find anyone else who wants to.

On Dec 5, 2:01 pm, Mxsmanic wrote:


I've written a lot of Wikipedia articles myself. Do you believe what I've
written because I put it in Wikipedia?

So that's where the inaccuracies about aviation came from...
Don't do it again

george writes:

So that's where the inaccuracies about aviation came from...

Who said anything about aviation?

Don't do it again

Or else what?

"Airbus" wrote in message
...
In article ,
says...

I've written a lot of Wikipedia articles myself. Do you believe what
I've
written because I put it in Wikipedia?

george writes:

So that's where the inaccuracies about aviation came from...

Who said anything about aviation?




That's right - I think I've found one of the articles ibn question :
http://en.wikipedia.org/wiki/Narciss...ality_disorder

That looks like the one.

On Dec 8, 8:39 am, "Maxwell" wrote:
"Airbus" wrote in message

...



In article ,
says...

I've written a lot of Wikipedia articles myself. Do you believe what
I've
written because I put it in Wikipedia?

george writes:

So that's where the inaccuracies about aviation came from...

Who said anything about aviation?

That's right - I think I've found one of the articles ibn question :
http://en.wikipedia.org/wiki/Narciss...ality_disorder

That looks like the one.

At least and for the first time he would have posted something upon
which he is undeniably, an expert.
Def:
X being an unknown quantity and spurt being a drip under pressure

In article ,
says...

I've written a lot of Wikipedia articles myself. Do you believe what
I've
written because I put it in Wikipedia?

george writes:

So that's where the inaccuracies about aviation came from...

Who said anything about aviation?




That's right - I think I've found one of the articles ibn question :
http://en.wikipedia.org/wiki/Narciss...ality_disorder

On 12/7/2007 11:39 AM Maxwell ignored two million years of human
evolution to write:

"Airbus" wrote in message
...
That's right - I think I've found one of the articles ibn question :
http://en.wikipedia.org/wiki/Narciss...ality_disorder

That looks like the one.

This one certainly appears appropriate:
http://en.wikipedia.org/wiki/Asperger%27s_syndrome
--
dgs

"d.g.s." wrote in message
...
On 12/7/2007 11:39 AM Maxwell ignored two million years of human evolution
to write:


so what's your point?

"Airbus" wrote in message
...
but generally Aspergers is considered less debilitating, less
of an "illness" and more of a "trait".

For personal reasons totally unrelated to aviation or the Eunuch, could you
point me to a reference describing Aspergers as a trait rather than an
illness?