Compass rose
- Thread starter tom.
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Let'sgoflying!
Touchdown! Greaser!
tom. said:
Left downwind, 9R?
HPNFlyGirl
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iBrookieMonster
The 99's are in charge of painting those. I can't wait to paint one myself.
Michael
Pattern Altitude
west of 9R
Lawreston
En-Route
Let'sgoflying!
Touchdown! Greaser!
Lawreston said:Good navigating. So, where am I?
HR
Pointed completely the wrong way. That is way too much snow. You need to turn almost 180 degrees, and go to full power!
Everyone knows a few smarta$$ comments are permitted on POA if they are meant in the right way, right?
SkyHog
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Everything Offends Me
They just repainted the one at Double Eagle, KAEG (or so it appears). I never quite understood the usefulness of the compass rose tho...
And btw, in the second picture, you are on the taxiway, just south of runway 9.
And btw, in the second picture, you are on the taxiway, just south of runway 9.
Lawreston
En-Route
Let'sgoflying! said:Pointed completely the wrong way. That is way too much snow. You need to turn almost 180 degrees, and go to full power!
Everyone knows a few smarta$$ comments are permitted on POA if they are meant in the right way, right?
Right!!
Lawreston
En-Route
SkyHog said:
Actually, I was in the run-up area at Twitchell's Airport 3B5 (Turner, Maine). The runway is 12/30, and just before lift-off to the left of the compass rose is Mike Twitchell with one of his students. (And, obviously, after lift-off).
What the heck! And there's the C-150M I traded to get back my original Skyhawk. Mud season came early this year; too many 40-50 deg. days in February.
HR
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Steve
En-Route
tom. said:
Some place way too cold for me..brrrrrr....
Missa
En-Route
tom. said:
I'd know that airport anywhere. PTK. Other end of the feild from where the picture of my Avatar was taken.
Are the flowers still on the fence off of 9L?? Probally not. : (
Missa
--It was my 99's chapter that painted that but it was before I joined. My first compass rose is at Port Huron.
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SkyHog said:
How do you swing your compass then?
SkyHog
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Everything Offends Me
Henning said:
Swing my compass?
I set my DG to the compass, taxi and check for a change, and then verify with runway heading if that's what you mean.
I fear I may have just outed a very critical lack of knowledge of mine....
wsuffa
Touchdown! Greaser!
SkyHog said:
What! You don't do it with your GPS??
(ducks and skulks away)...
gismo
Touchdown! Greaser!
SkyHog said:
Have you noticed that little "compass deviation card" mounted somewhere on or near your compass? "Swinging the compass" is how the numbers on the card came to be.
Missa
En-Route
lancefisher said:
Of course that only works if the compass rose was laid out correctly. What is pictured is the second compass rose painted at PTK. They had to paint over the first one 'cause someone, instead of getting magnetic north surveyed, just layed out 'north'. People started using the compass rose to check instruments and the airport had to get north surveyed and the rose was repainted.
Missa
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gkainz
Final Approach
Here's a few references:SkyHog said:
http://www.cockpitgps.com/other_articles/GPS_TAS/calibrating_a_compass_and_calcul.htm
http://www.casa.gov.au/download/orders/cao108/10806.pdf - from Australia, so you'll have to turn it upside down to make sense
Missa said:
Had that happen here too. The 99s painted a beautiful rose. After the paint dried it was pointed out that the surveyor the airport hired had laid out true north. No one thought to tell him!
Missa
En-Route
SkyHog said:
Just make sure you know what your actual magnetic runway heading is when you do that. The magnetic poles swing gently over time. The runway heading is _suppose_ to be to the nearest 10 degrees, but that's not always the case. At VLL the runway says 27 but it's been closer to a 28 (mag 7for a few years now and they just haven't re-numbered the runway. I 276) remember at Bad Axe I kept calling in bound for 21 until I got beam the numbers and saw it was actually 22 (at which point I relised my AFD was just a tad bit out of date, oops -> bought a new one when we landed
) Setting yourself 5 to 10 degrees off and your long cross country may end at another airfield. Missa
wsuffa
Touchdown! Greaser!
Missa said:
Surveyors have been known to get it wrong.
I remember that a $300,000 radio station directional antenna was laid out and installed to the incorrect version of North (true vs magnetic) courtesy of a surveyor. The techincal people from the station didn't catch it, and the surveyor didn't ask. Oops. Henceforth, the engineering specifications for such antennas included detailed instructions on which to use... and required the surveyor to shoot Polaris when setting up the array.
Missa
En-Route
wsuffa said:
At least that's a somewhat 'honest' mistake unlike the Homer-want-to-be walking out to the runup pad with a sharpie and drawing an arrow pointing north. DOH!
Missa
Missa said:
SOMEONE TOOK MISSA'S AVATAR?!!!
Didya call "GA-secure?"
wsuffa
Touchdown! Greaser!
Missa said:
True, but a LOT more expensive....
Missa
En-Route
mikea said:SOMEONE TOOK MISSA'S AVATAR?!!!
Didya call "GA-secure?"
GROAN!
Michael said:
That would be north of 9R...just slightly west.
I would give the Microsoft joke answer. "You're in an airplane."
You got your wrecked Skyhawk back? DO TELL that story! I must have missed it.Lawreston said:
Who adjusts the compass rose when magnetic north drifts? It's supposed to drift a lot faster in the future.
SkyHog said:
How do you know the compass is correct or at least what the deviation error is? That's what the compass rose is for. "Swinging the compass" is the act of correcting it best you can by lining up on the different headings on the rose and tweeking the screws with a plastic, brass or aluminum screwdriver (anything non ferrous will do) till when you go around the rose, you end up with minimum deviation throughout. Then you record the deviation on the compass error card on the front.
mikea said:
The paint is long expired by the time it's time to change it.
gkainz
Final Approach
The Compass Rose Deviation Calibration Department sends out a crew to swing the compass rose. Cut the pavement out to a depth of 8", re-align compass rose to magnetic north and replant the pavement.mikea said:
Brought to you by the Department of Redundancy Department. Please submit all requests for "The Paperless Office" publication "PO-FairyTale-33.22.2159" via Document Request DPO.2380.AG.0192830 in triplicate. Electronic submissions will not be accepted.
Lawreston
En-Route
mikea said:
For those who missed "wrecked," see photo 1(March 14, 2004). No injury. I sold it to a guy(former FAA Examiner - A&P) who rebuilt it over five months. Numerous showed interest and flew - nobody put up the fund$. May of 2005 I bought a C-150M(Photo 3). By December 2005 the Skyhawk hadn't been sold(Photo 2 is from April 2005)......................so I traded the 150M for my original plane(with one new wing; one wing repaired with new parts; new front windscreen; new side windscreens; new prop; new spinner; new crankshaft and coincident Major OverHaul to Zero-time SMOH. I've since panel-mounted Garmin GPSmap296 and Power flow Systems tuned exhaust; and the Skyhawk's new home will be in the recently-purchased(end unit A-1) Photo 4. (I should have stayed in photography; it's a cheaper hobby).
))))HR
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L10MAN
Pre-takeoff checklist
The last time I used a compass rose was at LAX and the 707 was still flying. Haven't seen one since.
Ron
Ron
fgcason
En-Route
gkainz said:
Compass Rose Deviation Calibration Department NPRM:
All compass roses shall be replaced with new compass roses installed on large lazy susans capable of carrying the rose plus maximum weight of the largest aircraft capable of using the airport based on the runway's design load. Each compass rose shall be driven by a high precision circular gearing, motor and position detection system. Dual redundant electronic magnetic direction finding equipment shall constantly keep the rose pointed to actual magnetic north.
gkainz said:The Compass Rose Deviation Calibration Department sends out a crew to swing the compass rose. Cut the pavement out to a depth of 8", re-align compass rose to magnetic north and replant the pavement.
Brought to you by the Department of Redundancy Department. Please submit all requests for "The Paperless Office" publication "PO-FairyTale-33.22.2159" via Document Request DPO.2380.AG.0192830 in triplicate. Electronic submissions will not be accepted.
Thanks Greg, I thought they just moved the runway.
