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- Vehicle and Terrain threads (http://forum.fulqrumpublishing.com/forumdisplay.php?f=198)

- - spit compass (http://forum.fulqrumpublishing.com/showthread.php?t=27185)

~S~

Quote:

Originally Posted by cheesehawk (Post 353100)

Off topic, what's the point of the gyro compass, isn't a setup like the 109 had much easier and less chance of getting lost? Why bother having a compass that works on the floor, to set up one that messes up every 15 minutes?

Take spitfire for 45min ride, try to fly according your gyro ... You will end up somewhere where You don't want to be... Therefore You have to recalibrate gyro. 109 has no problems because gyro error is not simulated yet...

Quote:

Originally Posted by _79_dev (Post 352945)

~S~

Any gyroscopic instruments used in airplanes are carrying minor error wich needs to be corrected within flight. Thanks to developers of this brilliant simulator we have chance to experience the same gyro disfuncionalities of gyro instruments. At this stage of development, I did't notice any errors in altimeter yet but I am sure it will be done at some stage... Anyway like in real life remember to correct your directional gyro after vast and rapid changes in altitude, heavy aerobatics or g-loads, eventually every every 15min.

Totally agree - What a brilliant sim. I started my flying career in a DeHaviland Chipmunk and that had the same compass - Actually it was like the Blenheim with a T shaped double lines on the bezel. It was in the same place as the Spit and hurricane, it was hard to see or to reach the bezel and adjust it while trying to fly straight - essential if you want it to read correctly. I think the Altimeter lags a bit in descent. The DI definately drifts in Hi-G manoeuvres.

Okay - Anyone know if Variation is in the Sim and when we put the Grid in missions, is it aligned with True North?

All in all a BRILLIANT Sim.

Lt Gosling
VBF-12

Magnetic declination in the sim is 10 degrees West.

Unsure if the grids are aligned with this or not.

Quote:

Originally Posted by CaptainDoggles (Post 353959)

Magnetic declination in the sim is 10 degrees West.

Unsure if the grids are aligned with this or not.

Outstanding, Thanks. That sounds about right. Its about 2 degree west now and was about 4 degrees west when I started flying 25 years ago so 10W adds up.

Gosling
VBF-12

Grids point to Grid North. So any angles measured then need to be adjusted for 10W variation.
(Add 10 degrees) to get Mag.

Quote:

Originally Posted by IvanK (Post 353978)

Grids point to Grid North. So any angles measured then need to be adjusted for 10W variation.
(Add 10 degrees) to get Mag.

Thanks, but are you sure you meant to say that.

I think you meant - Grids point to True North. Otherwise, your next sentance does not make sense.

CADET = Compass ADd East to True

Quote:

Originally Posted by ty1 (Post 350755)

Hi does any know how to set the compass if it works in the spit mk1a or procedure thanks in advance

You have to set keys for magnetic compass & for gyro.

Basically most people use to move the bottom one (magnetic) until indicated north and real north (the yellow T marker) are parallel then read the indicated heading and set gyro at same. Then you would follow the gyro.

For myself, I have an easier & faster trick.

Just keep the magnetic indicator as it is. Read the indication in front of the yellow T marker, and set the gyro to the symmetric value.

For example, if the magnetic compass points to 350, you are heading 10.
If it points to 270 you are heading 90.
If it points to 30 your heading is 330.
If it points to 150 you are heading 210.
0 is 0 and 180 is 180 but for other readings make the symmetry.

Also remember to recalibrate sometimes and always after strong maneouvers as the gyro will deviate. Only the magnetic will remain. And finally, the geographic north has 10 degree difference with magnetic north. So if you read on the map heading 90 you have to head 100 magnetic compass. Just add 10 degree to get the magnetic heading, the only one which you have access to.

Here's my take on it.

http://www.youtube.com/watch?v=O9ZRDkt6ODw

Cheers!

I tend to just read the magnetic these days because even the slightest move upsets the DI. The DI is about as useful as the artificial horizon - is this broken in game or was it just a useless instrument?

Quote:

Originally Posted by cheesehawk (Post 358238)

So once the 109's gyro distortion gets implemented, how did they take care of it? The whole compass thing gets me, glad I can dead reckon almost everywhere on the map! :)

No Gyro to it in the 109 just a straight out Raw Mag compass with all the usual errors associated with such. "ONUS" Nippy on North Sluggish on South plus the acceleration errors :)

As for those with Gyro instruments I think the Gyro precession is a little overdone.