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hmkim
01-15-2006, 03:28 PM
Just curious. Why did so many late Luftwaffe planes have a white spiral on the spinner? It's so hypnotizing!

hmkim
01-15-2006, 03:28 PM
Just curious. Why did so many late Luftwaffe planes have a white spiral on the spinner? It's so hypnotizing!

GreyBeast
01-15-2006, 03:33 PM
It was done in order for the ground crew to know that the prop was spinning.

Before that, they used to reach out their hands vaguely into the area of the prop, if it hurt the prop was spinning, if not, you were lucky and got to keep your fingers.

fighter_966
01-15-2006, 03:48 PM
flightleaders also used spirals and it was also
some kind of "teammark" for squadron

LStarosta
01-15-2006, 03:50 PM
It was used to induce nausea or even mild hypnosis in rear gunners aiming at the aircraft in question.

berg417448
01-15-2006, 03:51 PM
Still done today:

http://www.aerospaceweb.org/question/propulsion/q0233a.shtml

Chuck_Older
01-15-2006, 03:51 PM
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by GreyBeast:
It was done in order for the ground crew to know that the prop was spinning.

Before that, they used to reach out their hands vaguely into the area of the prop, if it hurt the prop was spinning, if not, you were lucky and got to keep your fingers. </div></BLOCKQUOTE>

I thought they tossed a salami at it. That would be win/win, if somebody else had a plate

CUJO_1970
01-15-2006, 03:59 PM
They did it because it looks cool as hell.

LStarosta
01-15-2006, 04:01 PM
Not true, Chuck.

Salami was deemed an unlawful appropriation of donkey in the Third Reich.

Source: Wursts in das Dritte Reich (Sausages in the Third Reich) by Hans Metzger.

MLudner
01-15-2006, 04:25 PM
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by GreyBeast:
It was done in order for the ground crew to know that the prop was spinning.

Before that, they used to reach out their hands vaguely into the area of the prop, if it hurt the prop was spinning, if not, you were lucky and got to keep your fingers. </div></BLOCKQUOTE>

http://forums.ubi.com/images/smilies/34.gif http://forums.ubi.com/images/smilies/16x16_smiley-very-happy.gif http://forums.ubi.com/images/smilies/88.gif

Dash_C.
01-15-2006, 05:02 PM
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by GreyBeast:
It was done in order for the ground crew to know that the prop was spinning.

Before that, they used to reach out their hands vaguely into the area of the prop, if it hurt the prop was spinning, if not, you were lucky and got to keep your fingers. </div></BLOCKQUOTE>

You is wrong.

Spiral on propeller spinner is to give plane festive appearance. Be sure.

http://forums.ubi.com/groupee_common/emoticons/icon_biggrin.gif

GreyBeast
01-15-2006, 05:21 PM
What's all the laughing about?

This is from Berg's (I don't have to type out all your numbers, do I?) post:

"The purpose of this pattern is to provide ground personnel with a visual cue that the engine is actually turning. This simple warning is an important safety feature that can often prevent tragic accidents when personnel are working near rotating engines. This precaution dates back to at least the 1930s when spirals appeared on the spinners of many propeller-driven aircraft. Otherwise, a propeller rotating at high revolutions per minute can become nearly invisible and very difficult to see to an observer on the ground. For example, think of the spinning blades of an electric fan or ceiling fan. As the speed of rotation increases, the blades become increasingly difficult to see."

The caption fails to mention it's really really hard to order five beers across a loud pub when you only have two or three fingers left.

Taylortony
01-15-2006, 06:08 PM
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by berg417448:
Still done today:

http://www.aerospaceweb.org/question/propulsion/q0233a.shtml </div></BLOCKQUOTE>

we were taught in the RAF that it is to simulate a giant eye to keep birds away, similar to the big circles on a lowly butterflies wings, same reason...believe me if the wind is turning it you know the thing chatters away like ball bearings in a tin box http://forums.ubi.com/groupee_common/emoticons/icon_wink.gif

Taylortony
01-15-2006, 06:10 PM
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Taylortony:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by berg417448:
Still done today:

http://www.aerospaceweb.org/question/propulsion/q0233a.shtml </div></BLOCKQUOTE>

we were taught in the RAF that it is to simulate a giant eye to keep birds away, similar to the big circles on a lowly butterflies wings, same reason...believe me if the wind is turning it you know the thing chatters away like ball bearings in a tin box http://forums.ubi.com/groupee_common/emoticons/icon_wink.gif </div></BLOCKQUOTE>

In the RAF we had prop blase painted white and black of different patterns... this created a strobe effect on them, worked real well

VW-IceFire
01-15-2006, 06:50 PM
Some 2nd TAF Typhoon squadrons painted a similar effect on their nose cones for the purposes of throwing the aim off of flak gunners. The design created a strobing effect that Taylortony mentioned.

No idea how effective it was. I imagine they didn't either...if it sounded good then they were willing to give it a try and see if it gained them a slight edge. Any edge in war is no doubt a bonus.

3.JG51_BigBear
01-15-2006, 07:51 PM
Towards the end of the war, the US began training bomber crews to associate the spiral pattern with bad smells and unpleasant sensations to train their brains to ignore it and focus their attention elsewhere.

JG7_Rall
01-15-2006, 08:01 PM
I thought it was to throw off the aim of the gunners...

alert_1
01-16-2006, 03:45 AM
It was actually introduced after failed "Operation Tabernacle" when in Africa one ground mechanics was decapitated in infamous "Indiana Jones incident"..

WOLFMondo
01-16-2006, 05:52 AM
My grandfather on my mother side of the family was a triage nurse in the RAF during the war, he was basically he was the guy who sat with the fire crews and raced out to returning planes with injured crews, landing and take off accidents etc. One of his most vivid and worst memories he's told me about is of a fitter being hit with a spinning prop. He said there was nothing left of the top half of his body and there was blood literally every where.

GreyBeast
01-16-2006, 10:14 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by WOLFMondo:
...He said there was nothing left of the top half of his body and there was blood literally every where... </div></BLOCKQUOTE>

No blood everywhere and not ALL of the top half gone, but on http://www.rotten.com you can see pics of a guy whose head got too close to the spinning blades of a chopper on an aircraft carrier. Look up "Helicopter" or "Chopper".

I'm gonna get banned for this, so you'll have to continue this thread without me for a while... http://forums.ubi.com/images/smilies/53.gif

Pirschjaeger
01-16-2006, 10:55 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by alert_1:
I´m dislectic, so please bear with me... </div></BLOCKQUOTE>

Worry not dude, I´ll drink beer with anybody. http://forums.ubi.com/images/smilies/16x16_smiley-wink.gif

Fritz

RegRag1977
01-16-2006, 11:06 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by CUJO_1970:
They did it because it looks cool as hell. </div></BLOCKQUOTE>

Listen to Cujo, this man is right! I Agree 100% http://forums.ubi.com/images/smilies/25.gif

Heliopause
01-16-2006, 11:14 AM
Quick recognition in combat ( for planes coming straight at you)...