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  #11  
Old 01-14-2015, 08:52 AM
ka6dan ka6dan is offline
 
Join Date: Apr 2008
Location: Dunnellon Fl
Posts: 174
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I'm from the school that it's better to have and not need than to need and not have.
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  #12  
Old 01-14-2015, 09:14 AM
Canadian_JOY Canadian_JOY is offline
 
Join Date: Aug 2007
Location: Ontario, Canada
Posts: 2,280
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When updating our panel one of the few instruments that survived is a WWII-vintage 3 1/8" wet compass. They knew how to make them back then - ours is quite accurate and consistent. While I have a battery backed up EFIS with magnetometer, I find myself always cross-checking with the whiskey compass. I guess that fits well with the way my brain works as I have an EFIS and moving map GPS, flanked by round engine gauges and a compass. The "old" technology works well to reinforce the excellent situational awareness provided by the "new" technology.
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  #13  
Old 01-14-2015, 10:17 AM
flyinga flyinga is offline
 
Join Date: Dec 2007
Location: Fredericksburg, TX
Posts: 662
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In the real world who cares about magnetic heading? Track is the important thing. Donning the flameproof suit now......
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  #14  
Old 01-14-2015, 10:23 AM
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Capflyer Capflyer is offline
 
Join Date: Feb 2005
Posts: 1,082
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OMG this has been hashed out on numerous posts over the years. In the US it is not required if you have another method of magnetic heading indication such as the EFIS. Do what you want though, regulation should not dictate your comfort level.
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  #15  
Old 01-14-2015, 10:24 AM
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Dan Langhout Dan Langhout is offline
 
Join Date: Mar 2008
Location: Huntsville, AL USA
Posts: 545
Default Nope

Magnetometer with the EFIS and two GPSs.
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  #16  
Old 01-14-2015, 10:27 AM
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RV7A Flyer RV7A Flyer is offline
 
Join Date: Jul 2013
Location: US
Posts: 2,245
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Quote:
Originally Posted by ColoRv View Post
My DAR wouldn't hear of not having a wet compass...even with two separate panel mounted efis systems with backup batteries for each. If it's driven by electricity it can fail...in his words. Have never even glanced at it...waste of my panel space.
Yeah, nothing like making up new requirements and regulations. Shees.

No wet compass, primary EFIS and backup EFIS, and my DAR never even brought up the question.

Probably because he's not re-living the 1940s and actually understands technology.
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  #17  
Old 01-14-2015, 10:42 AM
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lucaperazzolli lucaperazzolli is offline
 
Join Date: Sep 2006
Location: Trento, northern Italy
Posts: 621
Default Yes

As per FAR and here for EASA rules one compass stand-alone is needed.

Of course I've one, a wet one, next time a PAI will be my choice.

As DAR here in Italy I've to check that one is mounted during building or in the renewing act of a Permit to Fly.
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  #18  
Old 01-14-2015, 10:44 AM
Sledrider Sledrider is offline
 
Join Date: Aug 2011
Location: Ottawa, Canada
Posts: 34
Default Magnetic Compass

Word of advice to Canadian builders. If you mount a Vertical Power VP-X unit behind your instrument panel, make sure your magnetic compass is far away from it. During my first compass swing, I turned the compass adjustment screws to the end and still couldn't compensate for the error.

Installed a S.I.R. compass on the roll bar brace. It works perfectly. Extremely accurate.
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  #19  
Old 01-14-2015, 10:49 AM
60av8tor 60av8tor is offline
 
Join Date: May 2012
Location: Harrisburg, Pa
Posts: 759
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Quote:
Originally Posted by flyinga View Post
In the real world who cares about magnetic heading? Track is the important thing. Donning the flameproof suit now......
ATC still cares quite a bit.
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  #20  
Old 01-14-2015, 11:04 AM
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bruceh bruceh is offline
 
Join Date: Mar 2008
Location: Ramona, CA
Posts: 2,367
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My iPhone is my backup compass.
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