[NO BUG]Alignment fails if selecting alignment before power to avionics first.

[Sharpe_95]

@ Mods: sorry I posted before I put the full title. Would you mind editing the title to show the following for clarity: Bug or correct? Alignment fails if selecting alignment before power to avionics first.

 

Hi guys,

I have noticed two linked 'issues' and I wonder if they are a bug or deliberate?

 

1) If you start the alignment (or turn the alignment knob to Stored Heading/Normal align) BEFORE the power has been applied to the other navigation systems the alignment fails.

 

2) If the alignment fails in this situation, turning alignment to Off and either re-attempting a stored or Normal alignment the alignment will still fail.

 

Is this deliberate or as intended?

 

-S

Edited April 27, 2020 by Sharpe_95

[Tholozor]

Keep an eye on the caution lights panel during engine start, and wait for the ELEC SYS and SEC caution lights to go out as the generator comes online. Don't start the alignment process until your avionics power panel switches are on, and the DED is visible, then you can begin alignment. In scenario 2) have you tried turning off the INS and the switches on the avionics power panel before re-attempt?

Edited April 27, 2020 by Tholozor

[Frederf]

#1 is correct AFAIK. A sure safe state to start alignment is to wait for DED text display. I haven't tested but I'm guessing MMC power is all you need but you can't tell it's ready without UFC.

 

#2 I dunno. I would guess it's something like the EGI initializing to the MMC which doesn't happen if MMC is powered on with alignment knob in a bad state and that doesn't get rechecked until the next MMC cycle. I'm guessing though, but the phrase "doctor it hurts when I do this" keeps nagging me.

[randomTOTEN]

I also think you should have had a failed situation in scenario 1, but been able to successfully align after the reset for scenario 2.

[mvsgas]

AFAIK, in this versions of the F-16C, the MMC should not be turn on until main gen light goes out. The main gen should go out 10 seconds after stand by gen light goes off. Stand by gen light should go off at around 58% RPM. The MMC should be on for 20 seconds before turning on MIDS and doing INS alignment. Any problems with the alignment, you should turn the EGI of for 10 seconds before reattempting alignment. This time limit for the EGI should be the same even before doing a inflight alignment or during normal shutdown procedures.

 

With that said, I have never seen any problems in DCS so I never tried to see what happens if you do not follow those time limits.

Edited April 28, 2020 by mvsgas
spelling

[Sharpe_95]

AFAIK, in this versions of the F-16C, the MMC should not be turn on until main gen light goes out. The main gen should go out 10 seconds after stand by gen light goes off. Stand by gen light should go off at around 58% RPM. The MMC should be on for 20 seconds before turning on MIDS and doing INS alignment. Any problems with the alignment, you should turn the EGI of for 10 seconds before reattempting alignment. This time limit for the EGI should be the same even before doing a inflight alignment or during normal shutdown procedures.

 

With that said, I have never seen any problems in DCS so I never tried to see what happens if you do not follow those time limits.

 

Thanks for the notes guys :)

 

I will look into the second issue and see if I can replicate and make a track.

 

-S

[Bouli306]

Thanks for the notes guys :)

 

I will look into the second issue and see if I can replicate and make a track.

 

-S

 

Try to keep the Nav knob in off for at least 10 seconds before trying an alignment again.

[Sharpe_95]

Thanks for the notes guys :)

 

I will look into the second issue and see if I can replicate and make a track.

 

-S

 

I can confirm that keeping the INS knob set to off for at least 10 seconds does allow for a re-alignment attempt.

 

-Please delete post - no bug-

[BIGNEWY]

Thanks for letting us know

[HR-Crumble]

On this subject guys - if you run the auto-start sequence on the F-16 does this align and sort out all of the INS?

 

Sometimes when running auto-start the aircraft doesn't in fact align INS and the compass and VVI aren't there.

 

 

Matt

 

Sent from my IN2013 using Tapatalk