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08-25-2016, 02:29 PM
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Join Date: Oct 2010
Location: La Feria Texas
Posts: 3,822
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Any Old Compass Collectors?
I picked this up at a garage sale today, appears to be an old military compass. Has no liquid but I suppose it used to have some. Anybody know what it is?
[IMG]http:/  [/IMG] |
08-25-2016, 06:41 PM
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Join Date: May 2013
Location: Mount Vernon, Wa
Posts: 642
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Looks like a standard old AirPath that was lighted at one time. But, someone disabled it and put a dab of potting compound over the hole for the light fixture. It could've come from just about anything.
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Ken W.
Mount Vernon, WA
2020 VAF Supporter
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08-25-2016, 06:58 PM
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Join Date: Dec 2011
Location: Edinburg, TX
Posts: 617
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Just take the plug out of the top and fill it with some Jack Daniels and you'll have a real whisky compass for that RV 12.
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RV-3 Rebuilding
RV-9 Flying and having fun, experimenting and having fun, did I mention flying and having fun?
RV-6A SOLD
Maule M5-235C SOLD
C-172G SOLD
Stinson L5 SOLD
Grumman AA1A SOLD
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08-25-2016, 07:00 PM
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Join Date: Sep 2011
Location: WV22
Posts: 849
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I've collected a few compasse and agree with the above suggestion. I have one that came out of the first Harrier built in the U.S.A. Doesn't look no different other than green, than the pic shown but hey, it was in a Harrier!
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RV-4 0320\D3G 160, Whirlwind 200GA 70".
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08-25-2016, 07:40 PM
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Join Date: Mar 2008
Location: Seattle
Posts: 1,412
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Aircraft Spruce sells a compass rebuild kit that includes fluid (kerosene?) a gasket, and a new compass correction card.
I serviced the Airpath compass in my T-18 when it started leaking, it was easy.
I think it had some instructions too, although it's not difficult.
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Scott Emery
http://gallery.eaa326.org/v/members/semery/
EAA 668340, chapter 326 & IAC chapter 67
RV-8 N89SE first flight 12/26/2013
Yak55M, and the wife has an RV-4
There is nothing-absolute nothing-half so much worth doing as simply messing around with Aeroplanes
(with apologies to Ratty)
2019
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08-25-2016, 08:24 PM
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Join Date: Sep 2012
Location: Omaha, NE (KMLE)
Posts: 2,246
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Quote:
Originally Posted by SHIPCHIEF
Aircraft Spruce sells a compass rebuild kit that includes fluid (kerosene?) a gasket, and a new compass correction card.
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Just ba careful, the gasket in that kit won't fit some of the older models originally produced for military use. I know, I had one. Couldn't get an answer from Airpath, couldn't find the right gasket anywhere. Kit's fairly cheap but the fluid is just mineral spirits, I think.
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Dale
Omaha, NE
RV-12 # 222 N980KM "Screamin' Canary" (bought flying)
Fisher Celebrity (under construction)
Previous RV-7 project (sold)
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08-25-2016, 08:49 PM
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Join Date: Sep 2006
Location: Windsor, California
Posts: 920
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Years ago, while on a cross-country business trip in our Bonanza, we had our fuel tanks topped off while we scarfed down a hamburger at the airport cafe. Upon our return to the cockpit, we smelled the distinctive odor of kerosene. Our first thought was: D@#%, we were misfueled with Jet-A by line service!! Upon further investigation we found that our whiskey compass had sprung a leak in the hot sun and was bleeding the odorous kerosene. A quick scare, easily repaired. 
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David Heal - Windsor, CA (near Santa Rosa)
EAA #23982 (circa 1965) - EAA Technical Counselor and Flight Advisor; CFI - A&I
RV-12 E-LSA #120496 (SV w/ AP and ADS-B 2020) - N124DH flying since March 2014 - 940+ hours (as of September 2020)! 
V AF donation through June 2021.
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08-26-2016, 05:25 AM
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Join Date: Jan 2007
Location: Stuart, FL /Hartford, CT/Virgin Gorda,BVI
Posts: 3,122
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you can also use johnsons clear baby oil. it will also dampen out the compass errors.
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TURBO YES =VAF= Payed Jan2019
Ed D'Arcy
RV6-A 5,200+ hrs, R-44 1,600 hrs, Helicycle 320 hrs, gyro sold,35,000 miles flown in 2015 
Stuart, Fl / S WINDSOR,Ct / Virgin Gorda, BVI - under major repair from hurricane damage
VAF #840 EAA AOPA FAC FABA QB SPA
addicted pickle ball player
https://i.postimg.cc/tn3h4svg/IMG-3101.jpg
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08-26-2016, 05:44 AM
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Join Date: Oct 2008
Location: Hales Corners, WI
Posts: 981
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I topped mine off with baby oil when installing it. It was 2nd or 3rd hand or whatever. One day I was flying along a 11'500' and something was dripping on my leg! Took a while to figure it out, I was a bit freaked out. The smell of baby oil gave it away though. It quit when I descended. Guess I've calibrated the liquid level for 11,500, ha!
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Jesse Bentley
N229Z - RV-8 - Flying - Livin' the dream!
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08-26-2016, 07:29 AM
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Join Date: Oct 2010
Location: La Feria Texas
Posts: 3,822
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I have not had one apart, but looking at Aircraft Spruce repair kits, apparently there is a rubber membrane that allows the liquid to expand?
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