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  #1  
Old 02-10-2010, 12:23 PM
flyboy1963's Avatar
flyboy1963 flyboy1963 is offline
 
Join Date: Oct 2008
Location: Lake Country, B.C. Canada
Posts: 2,416
Default compass swingin'
help!
searched numerous forums, TONS of lengthy articles on how to calculate correction A + B/2 etc....
but HOW do you do it???????????????????
Obviously you line up the plane etc.
Where the heck is the 'North' adjusting screw???
My 'van's' compass has 4 screws that just look like they hold the case together, do I start cranking on those? or are they hidden somewhere.
how many turns can you do before they are going to fall out, or wreck something inside?
roughly what result can i expect trying to run the engine at cruise power on the ground, with the resulting vibration jiggling the compass all over the place etc.
interesting that some guys have flown around the world with one!
( I don't think I'll try that !
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  #2  
Old 02-10-2010, 12:27 PM
lucky lucky is offline
 
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Posts: 215
Default Do you have an EAA or tech counselor ...
...to show you how?

Even if someone answered all your questions to the nth degree it would still be better if an experienced person was there to help you do it right who's done it before right themselves. another set of eyes and and hands to help jostle the plane around the compass rose is nice.
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Last edited by lucky : 02-10-2010 at 01:00 PM.
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  #3  
Old 02-10-2010, 01:15 PM
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Mel Mel is offline
 
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Location: Dallas area
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Default
Not sure which compass you have. Typically there are 2 adjusting screws under a cover plate. One is N-S and the other is E-W. Align with north and "zero" with the N-S screw. Align with east and "zero" with the E-W screw. Align with south and take out 1/2 the correction with the N-S screw. Align with west and take out 1/2 the correction. Repeat the procedure at least once.
Like Lucky says, you should get assistance from someone who has done it before.
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Mel Asberry, DAR since the last century.
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  #4  
Old 02-10-2010, 03:50 PM
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flyboy1963 flyboy1963 is offline
 
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Default swingin'
thanks guys, will take a close look at the compass ( Falcon?) and dig up the builder and/ or a manual to assist.
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  #5  
Old 02-11-2010, 10:34 AM
664781 664781 is offline
 
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Location: Powder Springs, Ga
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Default Screwdriver
Make sure you use a brass screwdriver or you will chase it all over the place.
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  #6  
Old 02-11-2010, 10:46 AM
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Mel Mel is offline
 
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Quote:
Originally Posted by 664781 View Post
Make sure you use a brass screwdriver or you will chase it all over the place.
Aluminum or plastic will work also. Just so it isn't ferrous.
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Mel Asberry, DAR since the last century.
EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)
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  #7  
Old 02-11-2010, 03:36 PM
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Location: Stuart, FL /Hartford, CT/Virgin Gorda,BVI
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Default thanks for the help
Quote:
Originally Posted by Mel View Post
Not sure which compass you have. Typically there are 2 adjusting screws under a cover plate. One is N-S and the other is E-W. Align with north and "zero" with the N-S screw. Align with east and "zero" with the E-W screw. Align with south and take out 1/2 the correction with the N-S screw. Align with west and take out 1/2 the correction. Repeat the procedure at least once.
Like Lucky says, you should get assistance from someone who has done it before.
mel, thanks for your info. set the compass as you stated and it is much improved. i use a brass fueler gauge. you da man. thanks turbo
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Last edited by turbo : 02-11-2010 at 06:00 PM.
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