Alignment on F-14B on the carrier

[TwoThrones]

Good day gentelments.

Kindly asking you to help me. I faced with a problem of alignment on F-14B on the carrier. The problem is heading error. f10 map heading and heading of the aircraft isnt match if course of the carrier is like ~90 or ~270 degr.

 

On these course error is ~10degr

If course of the carrier ~360degr error is ~2degr. Tell me is it kind of a bug or implementation gyrocompass errors on this courses?

 

 

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DCS World 2.5.5.41371

f14_1.trk

f14_2.trk

Edited February 10, 2020 by TwoThrones

[draconus]

1. Check MagVar for where you are.

 

2. The carrier itself being massive metal object gives the heading error.

[TwoThrones]

1. Check MagVar for where you are.

 

i tryed set MagVar before aligment and after aligment it but nothing has changed - the result is same

 

2. The carrier itself being massive metal object gives the heading error.

 

after I takeoff from the deck of carrier - nothing has changed. the plane's heading has remained incorrect

[TwoThrones]

new video

[draconus]

https://forums.eagle.ru/showthread.php?t=247891

The heading can deviate up to 20 or 30 degrees, depending on the parking position on the carrier and the carrier’s heading

[Amarr Sarum]

Magnetic deviation can affect only on magnetic compass. Here I see gyrocompass error if the motion on E or W. Smb officialy can confirm it?

[TwoThrones]

Note that you will get erroneous heading readings on a carrier, even if fine align is complete. The heading can deviate up to 20 or 30 degrees, depending on the parking position on the carrier and the carrier’s heading, due to the carrier’s own magnetic field and induced magnetic field. It is important that the flight crew know the carrier’s BRC. The magnetic variation caused by the carrier’s magnetic distortion will go away shortly after take off. This magnetic distortion does not impact the alignment quality.

 

should it be fixed after i take off? I flew for 20 minutes, nothing was fixed!

[IronMike]

should it be fixed after i take off? I flew for 20 minutes, nothing was fixed!

 

 

 

 

Yes, it can take several minutes sometimes, however not 20. One possibility is that you shot your INS to bits on the cat, that is ultra rare though, it happened irl and we did model it however. But if a simmer gets that more than once in his playing time, it would already be noticeable, so far no one reported it/ discovered it.

 

If it takes you always 20 minutes and nothing happens you can do the following: on the COMP panel, press the HDG button for about 1 minutes while flying completely level and at the exact same speed. You will see a needle next to it out of line, which indicates the deviation of the AHRS. Once it is aligned your compass should be aligned correctly again.

 

However: we did also model the earth's magnetic field, and the deviation it causes to the navigation systems. With this, due to to the earth's magnetic curvature, you have to consider that you get much higher erronous readings or can generally get erronous readings when you are on or close to East - West (or vice versa) courses, while the effect is decreased or almost not noticeable (except the normal Magvar - and check for that, too), on North-South courses (or vice versa).

 

 

 

Always check for your MAGVAR symbol on the TID, too.

 

And an easy test: set a carrier to north south course (best just let it head north), align, take off and see what you get, including pressing the HDG button.

 

Lastly, it is possible that somehow the alignment got screwed, online for example through warping or lag (plane moved), or that you did not align fully (which setting do you select?), but in general this should not be the case.

[TOViper]

A question came up for me today:

 

I went flying with the Tomcat in Caucasus in MP, newest OB.

A friend of mine had the F-18, me in the CAT as pilot, Jester RIO.

I spawned HOT on the Stennis, and after takeoff in FL300 during unaccelerated flying with autopilot and I had a mismatch between the compass readout and the HSI readout.

We compared the compass headings while flying inbound a TACAN station in 40 miles away, they were +/- the same, but my HSI showed a heading failure of approximately 20 to 25°.

 

Shouldn't Jester do the alignment on the carrier perfectly by using the special "carrier alignment mode"?

[IronMike]

A question came up for me today:

 

I went flying with the Tomcat in Caucasus in MP, newest OB.

A friend of mine had the F-18, me in the CAT as pilot, Jester RIO.

I spawned HOT on the Stennis, and after takeoff in FL300 during unaccelerated flying with autopilot and I had a mismatch between the compass readout and the HSI readout.

We compared the compass headings while flying inbound a TACAN station in 40 miles away, they were +/- the same, but my HSI showed a heading failure of approximately 20 to 25°.

 

Shouldn't Jester do the alignment on the carrier perfectly by using the special "carrier alignment mode"?

 

 

 

 

This sounds like you might be the first one who shot the INS on a cat launch. Unless this happens every time, then something with alignment could be borked. I tried it several times on the SC and it worked fine, including AHS.

[near_blind]

This sounds like you might be the first one who shot the INS on a cat launch. Unless this happens every time, then something with alignment could be borked. I tried it several times on the SC and it worked fine, including AHS.

 

Friday night I had a similar issue where I somehow registered upwards of 7G on the cat shot and had a woefully misaligned bomb fall line in A/G mode. This afternoon my wingman was telling me he had massive INS drift immediately after the cat shot following a hot start.

[TOViper]

Flew the mission again, same behaviour.

 

Watch the video: https://youtu.be/yo02NNRH_3c?

 

@3:23 I level off to stabilize the compass.

 

Good part is: It got better and better the longer I flew (not on video, upload would took ages). Seems AHRS is fine aligning itself with time?!?

TRK exists, but the aircraft crashes due to wrong taxi behaviour on deck.

Edited May 24, 2020 by TOViper