Why?

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10th December 2004 | 01:26

#1 (permalink)

TIMTS

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Joined: Jul 2002

Posts: 230

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From: Murica.

Why?

The picture is taken at TNCM and is a 737 BBJ. The question is: Why does the spinner have this white twisting line painted on it? Just for looks or does it have a purpose?

10th December 2004 | 01:29

#2 (permalink)

simfly

Joined: Nov 2000

Posts: 423

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From: Scotland

You'll find that most turbo fans have this, it helps show whether the fan is turning or not for a start...

10th December 2004 | 01:57

#3 (permalink)

TIMTS

Thread Starter

Joined: Jul 2002

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From: Murica.

ok..makes sense..thanks.

Is it just me or is this thing just a beautiful piece of engineering?

This one is not far behind!!

10th December 2004 | 05:17

#4 (permalink)

SeldomFixit

Joined: Oct 1999

Posts: 668

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From: Adelaide

There was/is a theory that it helps deter birdstrikes by oscillating and giving the hapless avion something to see/avoid.
Definitely helps se/avoid for any hapless plod that thinks getting up close and personal at the wrong time might be fun

10th December 2004 | 05:50

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Hay Ewe

Joined: Sep 2003

Posts: 45

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From: The Front Padock

There is already at least one thread on pprune about this- I dont know how to post a link to a search. from memory, it is a visual thing for ground people, with all noise on the ramp / stand call it what ever it is a visual clue

Hay Ewe - take a look at this