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This way to the North...? (Read 1125 times)
Apr 30
th
, 2003 at 12:39pm
Fozzer
Offline
Colonel
An elderly FS 2004 addict!
Hereford. England. EGBS.
Posts: 24861
In England, our country is positioned so that the top, (Scotland, Whity's and Crazy Craig's part), is pointing North, and the botton, (Cornwall, Woodlouse's part), is pointing South, and West and East are directly either-side, (Me and Fag-end), which is cool...
...!
So when flying/driving by compass we just fly/drive in those directions to reach our destination, easy-peasy...
...BUT...!
California where I fly, on my real paper map of California, or my real globe, the State appears to be vertical, (or near enuf').
So I think to myself, (as I do), if I want to fly from Los Angeles to San Francisco, which is "vertically up", (or near enuf'), all I have to do is to follow my compass Northwards...
...WRONG...!
I actually have to fly a course North-West.
The West coast compass bearing is actually South-West and the Nevada Desert, East-wards, is actually North-East....!
..and from 'Frisco to L.A. I have to fly South-East.
It's all very confusing flying by compass while reading a flat paper map...!
Does any one else have this confusion when relating their countries up-down-left-right lay-out in relation to the actual compass bearing...?
(It's all to do with the Longtitude lines on the map.
If I could see Longditude/Latitude lines in the sky, there would be no problems)....!
...or is it just me*...!
LOL...LOL...LOL...!
Cheers...
Paul.
(England. Up, down, left and right, no prob...)
...*me, (probably)...!
LOL...!
(I also have similar problems with compass bearings when going upstairs to bed at night, in that situation it's just "up"...followed by "down" in the morning)...!
LOL...!
Dell Dimension 5000 BTX Tower. Win7 Home Edition, 32 Bit. Intel Pentium 4, dual 2.8 GHz. 2.5GB RAM, nVidia GF 9500GT 1GB. SATA 500GB + 80GB. Philips 17" LCD Monitor. Micronet ADSL Modem only. Saitek Cyborg Evo Force. FS 2004 + FSX. Briggs and Stratton Petrol Lawn Mower...Motor Bikes. Gas Cooker... and lots of musical instruments!.... ...!
Yamaha MO6,MM6,DX7,DX11,DX21,DX100,MK100,EMT10,PSR400,PSS780,Roland GW-8L v2,TR505,Casio MT-205,Korg CX3v2 dual manual,+ Leslie 760,M-Audio Prokeys88,KeyRig,Cubase,Keyfax4,Guitars,Orchestral,Baroque,Renaissance,Medieval Instruments.
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Reply #1 -
Apr 30
th
, 2003 at 12:56pm
ozzy72
Offline
Global Moderator
Pretty scary huh?
Madsville
Gender:
Posts: 37122
Fozzer you have to remember a map is a flat piece of paper and the world is a globe. The best way to get a perspective is to look at a small globe, and you'll suddenly see things clearly.
Oh and don't forget to clean your glasses mate
Ozzy
PS. I find after the 17th crate of Chateau Neuf de Pap my nav goes to rat droppings!!!
I'm sure you are familiar with this problem.... But my flying is mightily impressive, if somewhat lacking in commonsense/sanity, but you knew that
There are two types of aeroplane, Spitfires and everything else that wishes it was a Spitfire!
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Reply #2 -
Apr 30
th
, 2003 at 1:28pm
Fozzer
Offline
Colonel
An elderly FS 2004 addict!
Hereford. England. EGBS.
Posts: 24861
Quote:
...Fozzer you have to remember a map is a flat piece of paper and the world is a globe.....
Ozzy
Nah....!
I don't believe that...
...!
I don't venture too far off the Pacific coast of California in case I drop off the edge....
...!
Cheers...
Paul.
(England).
..even Queen Elizabeth 1st. thought that Sir Walter Raleigh's fag was full of rat droppings....
It wasn't, of course.
Just ask Will, (Smoke-2-much)....
...!
LOL...!
Dell Dimension 5000 BTX Tower. Win7 Home Edition, 32 Bit. Intel Pentium 4, dual 2.8 GHz. 2.5GB RAM, nVidia GF 9500GT 1GB. SATA 500GB + 80GB. Philips 17" LCD Monitor. Micronet ADSL Modem only. Saitek Cyborg Evo Force. FS 2004 + FSX. Briggs and Stratton Petrol Lawn Mower...Motor Bikes. Gas Cooker... and lots of musical instruments!.... ...!
Yamaha MO6,MM6,DX7,DX11,DX21,DX100,MK100,EMT10,PSR400,PSS780,Roland GW-8L v2,TR505,Casio MT-205,Korg CX3v2 dual manual,+ Leslie 760,M-Audio Prokeys88,KeyRig,Cubase,Keyfax4,Guitars,Orchestral,Baroque,Renaissance,Medieval Instruments.
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Reply #3 -
Apr 30
th
, 2003 at 1:42pm
WebbPA
Ex Member
I Like Flight Simulation!
Everyone knows that Key West is the southernmost point in the continental US - right?
And "South Florida" means Miami - right?
So which way do you go to get from Key West to Miami - East. Actually, about 72-75 degrees.
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Reply #4 -
Apr 30
th
, 2003 at 1:53pm
Rifleman
Offline
Colonel
" Full size A/C are just
overgrown models ! "
Tropical island in the Pacific
Posts: 6622
Hey Foz ....next time you fly Calif, try traveling north to Vancouver Island and see if you can drop a message to our house...we are within walking distance of Courtenay Airpark.........you may find nice scenery if you travel towards the Pacific Coast by crossing the Comox Glacier......
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Reply #5 -
Apr 30
th
, 2003 at 1:57pm
Mr. Bones
Offline
Colonel
Posts: 4304
and what about the earth magnetic field which influences the compass...
Raw power...the J-58.&&
&&&&
My Anet collection.
&&
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Reply #6 -
Apr 30
th
, 2003 at 2:14pm
Redwing
Offline
Colonel
I love YaBB 1G - SP1!
Posts: 133
You also have to consider
magnetic variation and compass deviation
! On the west coast, there's something like a 13 degree easterly error (from true north). Plus you have errors in compass readings due to magnetic interference from the aircraft itself!
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Reply #7 -
Apr 30
th
, 2003 at 2:15pm
Fozzer
Offline
Colonel
An elderly FS 2004 addict!
Hereford. England. EGBS.
Posts: 24861
Quote:
,,,,and what about the earth magnetic field which influences the compass...
The only thing which affects my compass is my sandwich tin sitting on top of my instrument panel, but I always remember to take that into account...
...!
LOL...LOL...LOL...!
Cheers...
Paul....munching a cheese sandwich*...
...!
(England),
*which also changes my planes centre of gravity from my sandwich tin to my tummy.... ???....!
Dell Dimension 5000 BTX Tower. Win7 Home Edition, 32 Bit. Intel Pentium 4, dual 2.8 GHz. 2.5GB RAM, nVidia GF 9500GT 1GB. SATA 500GB + 80GB. Philips 17" LCD Monitor. Micronet ADSL Modem only. Saitek Cyborg Evo Force. FS 2004 + FSX. Briggs and Stratton Petrol Lawn Mower...Motor Bikes. Gas Cooker... and lots of musical instruments!.... ...!
Yamaha MO6,MM6,DX7,DX11,DX21,DX100,MK100,EMT10,PSR400,PSS780,Roland GW-8L v2,TR505,Casio MT-205,Korg CX3v2 dual manual,+ Leslie 760,M-Audio Prokeys88,KeyRig,Cubase,Keyfax4,Guitars,Orchestral,Baroque,Renaissance,Medieval Instruments.
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Reply #8 -
Apr 30
th
, 2003 at 2:40pm
Fozzer
Offline
Colonel
An elderly FS 2004 addict!
Hereford. England. EGBS.
Posts: 24861
Quote:
Hey Foz ....next time you fly Calif, try traveling north to Vancouver Island and see if you can drop a message to our house...we are within walking distance of Courtenay Airpark.........you may find nice scenery if you travel towards the Pacific Coast by crossing the Comox Glacier......
Blimey Ken...
That's going to take weeks, (months), to fly from 'Frisco to Vancouver in my T-Bird II Microlight....
...!
(Just got my trusty Readers Digest Great World Atlas out)...
...!
Vancouver = 125* Long, 50* Lat. in Canada, very close to the North Pole, therefore quite, (very), cold. (I'm not happy with "cold", it causes my Bing carburettors to freeze*)....
...!
Cheers Mate...
...!
Paul.
(England).
...*not to mention "other" parts...
...!
Dell Dimension 5000 BTX Tower. Win7 Home Edition, 32 Bit. Intel Pentium 4, dual 2.8 GHz. 2.5GB RAM, nVidia GF 9500GT 1GB. SATA 500GB + 80GB. Philips 17" LCD Monitor. Micronet ADSL Modem only. Saitek Cyborg Evo Force. FS 2004 + FSX. Briggs and Stratton Petrol Lawn Mower...Motor Bikes. Gas Cooker... and lots of musical instruments!.... ...!
Yamaha MO6,MM6,DX7,DX11,DX21,DX100,MK100,EMT10,PSR400,PSS780,Roland GW-8L v2,TR505,Casio MT-205,Korg CX3v2 dual manual,+ Leslie 760,M-Audio Prokeys88,KeyRig,Cubase,Keyfax4,Guitars,Orchestral,Baroque,Renaissance,Medieval Instruments.
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Reply #9 -
Apr 30
th
, 2003 at 11:52pm
SilverFox441
Offline
Colonel
Now What?
Mississauga, Ontario, Canada
Gender:
Posts: 1467
That's not map confusion.
Map confusion is for all those people that want to drive from the US to Canada and get told they have to leave Detroit, Michigan, USA heading
south
to reach Windsor, Ontario, Canada.
Or those poor fools living in one part of Panama that have the Pacific Ocean to the
east
and the Atlantic to the
west
.
True map confusion requires at least a 90 deg variance from what you know to be true.
Steve
(Silver Fox)
Daly
&&
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Reply #10 -
May 1
st
, 2003 at 3:20am
Cloud Maker
Guest
What say someone design a grid of longitude and latitude lines to past onto flight sim scenery so Fozzer doesn't end up as bear droppings after he runs out of petrol and crashes in the high Sierras...........LOL
Only kidding.
Cheers
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Reply #11 -
May 1
st
, 2003 at 3:40am
ozzy72
Offline
Global Moderator
Pretty scary huh?
Madsville
Gender:
Posts: 37122
Not a bad idea Cloud Maker. Every little helps.
Fozzer I think your best bet is to do what I do and get down low and read the street signs and then grab the local equivilant of the A to Z!
Of course I'm rather a lot of sandwiches short of a picnic
Ozzy
There are two types of aeroplane, Spitfires and everything else that wishes it was a Spitfire!
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Reply #12 -
May 1
st
, 2003 at 5:48am
Mr. Bones
Offline
Colonel
Posts: 4304
Quote:
You also have to consider
magnetic variation and compass deviation
! On the west coast, there's something like a 13 degree easterly error (from true north). Plus you have errors in compass readings due to magnetic interference from the aircraft itself!
that's what i meant, the magnetic variation and compass deviation.
Raw power...the J-58.&&
&&&&
My Anet collection.
&&
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Reply #13 -
May 1
st
, 2003 at 1:12pm
Redwing
Offline
Colonel
I love YaBB 1G - SP1!
Posts: 133
Quote:
that's what i meant, the magnetic variation and compass deviation.
Of course.......you knew that!
Then there's another problem.....the heading drift of the Directional Gyro (or Heading Indicator) due to
precession
, a characteristic of gyroscopic intruments!
Pilots should check and reset the DG to the magnetic compass every 15 minutes or so for accuracy (.....I think this can be turned on/off in FS2k2).
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Reply #14 -
May 2
nd
, 2003 at 2:55am
SilverFox441
Offline
Colonel
Now What?
Mississauga, Ontario, Canada
Gender:
Posts: 1467
Reset the gyro every 15 minutes!
Is this a real civilian requirement? When I was working the labs in CFB North Bay we were required to certify that the gyro didn't vary by more than 1 deg in a one hour period. I'd hat to think how much drag there would have to be on the bearing to get that much precession in so little time.
Also trying to align the gyro to the the standby compass was strictly forbidden except as a last resort. Even with a deviation card in the plane you would have to turn to one of the indicated cardinals or semi cardinals to acheive a known deviation (calibrated error) before attempting this. Even then your primary heading indication is now less accurate than your standby.
Steve
(Silver Fox)
Daly
&&
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Reply #15 -
May 2
nd
, 2003 at 1:32pm
Redwing
Offline
Colonel
I love YaBB 1G - SP1!
Posts: 133
Quote:
Reset the gyro every 15 minutes!
That's an A-ffirmative! At least that's what I was taught over my years of flight training, check rides, and reviews.
As far as any legal requirements, I don't know (and haven't bothered to check) what's in the FARs; I'm certain there are manufacturer's tolerances for their gyro instruments....their testing/inspection info would be maintained in the aircraft logbook.
The directional gyros in the single and twin-engine aircraft I've flown did require frequent checking (every 15 min. recommended); they could drift excessively over time. When resetting the DG to the magnetic compass, you should be in wings-level, unaccelerated flight.
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