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article on vertical card compasses

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tjs22t(at)verizon.net
Guest

Posted: Wed Dec 05, 2007 2:47 pm Post subject: article on vertical card compasses

Here's an excellent article on "repairing" the vertical card compass:



http://www.avionicswest.com/articles.htm#MAGNETIC%20COMPASS!



You will find a bit of work may save your inoperatible VCC.  I listed this article about six or seven years ago after Grant C. complained about his.  He followed this article and the compass was right on.



Bryan, this might have been the problem with your Hamiliton.  I think Fred Hulen has a Hamilton and it works fine.  When installing my PAI 700 I used brass tools.



don't forget to flare  tj

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bryanmmartin

Joined: 10 Jan 2006
Posts: 1018

Posted: Wed Dec 05, 2007 4:08 pm Post subject: article on vertical card compasses

I found this article myself several months ago, I thought it might be  

the problem with mine. I checked it out and this definitely wasn't the  

problem. the compass would work correctly away from the airplane but  

if i set it on the glare shield, it absolutely refused to point north  

or south and I used non magnetic tools to install and adjust it. If I  

could have found a way to mount it up on the canopy where the Walmart  

compass is mounted now, maybe it would have worked. But if the $10  

compass works why bother with the $200 compass. I do my navigating  

with a GPS anyway and I also have a DG. The only time the compass  

comes in handy is to reset the DG on a cross country flight.

On Dec 5, 2007, at 5:46 PM, <tjs22t(at)verizon.net> wrote:



 	  Quote: 	
		   



 Here's an excellent article on "repairing" the vertical card compass:



 http://www.avionicswest.com/articles.htm#MAGNETIC%20COMPASS!



 You will find a bit of work may save your inoperatible VCC.  I  

 listed this article about six or seven years ago after Grant C.  

 complained about his.  He followed this article and the compass was  

 right on.



 Bryan, this might have been the problem with your Hamiliton.  I  

 think Fred Hulen has a Hamilton and it works fine.  When installing  

 my PAI 700 I used brass tools.



 don't forget to flare  tj


	


-- 

Bryan Martin

N61BM, CH 601 XL,

RAM Subaru, Stratus redrive.

do not archive.

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_________________
--
Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
do not archive.

Martin Pohl

Joined: 30 Jan 2006
Posts: 118
Location: CH-8645 Jona SG, Switzerland

Posted: Thu Dec 06, 2007 2:33 pm Post subject: Re: article on vertical card compasses

This is what Precision Aviation Inc. is writing about the mentioned article:

 	  Quote: 	
		  No, the magnet cannot be pulled out of the gimbal, due to the use of a jeweled limit pin, which allows the compass to be flown inverted. However, this myth concerning pulling the magnet out of the gimbal showed up sometime back in an article and was later propagated via the internet in an article titled "Our Ally, The Magnetic Compass". 	


Here: http://www.pai700.com

Cheers Martin

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_________________
Martin Pohl
Zodiac XL QBK
8645 Jona, Switzerland
http://www.pohltec.ch/ZodiacXL/Main.html

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