Av8
Topic Author
Posts: 37
Joined: Mon Nov 12, 2001 10:18 am

Why Is It Tilted?

Fri Feb 22, 2002 5:47 am

I've noticed that in a lot of the pic's of cockpits, if nothing's running, the attitude indicatior is tilted. Why is this?
 
TurbineBeaver
Posts: 1511
Joined: Fri Jan 11, 2002 1:50 am

RE: Why Is It Tilted?

Fri Feb 22, 2002 5:50 am

The Attitude indicator runs on a gyro system, which works by the suction of a vacuum. If nothing is running, the vacuum is off, and the gyro stops spinning so the Attitude Indicator won't work.

TB
 
TWAL1011
Posts: 2317
Joined: Mon Nov 10, 2003 12:39 pm

RE: Why Is It Tilted?

Fri Feb 22, 2002 7:29 am

Interesting...I always thought gyros were electrical. If they're vacuum, how do they work without an engine running?
 
TWAL1011
Posts: 2317
Joined: Mon Nov 10, 2003 12:39 pm

RE: Why Is It Tilted?

Fri Feb 22, 2002 7:33 am

Okay, I'll be the first to admit when I'm wrong...

Note to self: Research and then post. Not the other way around.

Anyway, here's a detailed explanation:

http://www.avweb.com/articles/attitude.html

Sorry!
 
ThirtyEcho
Posts: 1409
Joined: Tue Jan 01, 2002 1:21 am

RE: Why Is It Tilted?

Fri Feb 22, 2002 8:01 am

Gyros are either electrical or vacuum; to provide redundancy, one gyro is electric and the other vacuum. Its a whole other thing in a glass cockpit, though.
 
TurbineBeaver
Posts: 1511
Joined: Fri Jan 11, 2002 1:50 am

RE: Why Is It Tilted?

Fri Feb 22, 2002 10:45 am

TWAL1011...that's the whole point, your DG (Directional Gyro) and your Attitude Indicator are vacuum run, so when you loose your engine, you lose your vacuum, and lose your attitude indicator and DG.


Click for large version
Click here for full size photo!

Photo © Mike Elliott



(see in the pic, it says VACUUM on the DG and Attitude Indicator)

TB

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