correct as is F/A-18C AFCS (autopilot) not following heading bug when HSI is in TRUE HDG

[Focha]

To replicate use a map with a big difference between the true and magnetic heading, this one was in Kola.

Switch HSI to TRUE HDG via HSI DATA ACFT.

Then when you select an HDG with the HDG bug on HSI the AFCS does not follow TRUE HDG instead it keeps following MAG HDG.

I don't have specific knowledge on the F/A-18 but many other aircraft AFCS will always follow the HDG bug.

[Lord Vader]

Hello @Focha

The F/A-18C Lot 20 pilot relief autopilot HDG mode will only follow magnetic heading, regardless of the pilot TRUE of MAG selection for HSI/HUD. This is a real limitation of the aircraft, our simulation just reproduces it. 

Thanks for your time.

[Focha]

Hi,

Thank you for your reply.

According with NATOPS available document, it does not state any limitation on the system.

MODERATION: (removed manual quote due to Forum rules)

The heading selection should not be dependent on the True or Magnetic heading, it is only a heading bug. 

The problem that I am stating here, it is related with that selection. 

The aircraft, with HSI in TRUE HDG, when you select the heading bug, it will always display the MAG HDG instead of TRUE HDG.

It is very hard to belive that such aircraft has such limitation, can you please provide any reference?

Thank you.

[Lord Vader]

Thank you for your reply, @Focha

Please do not share real life documentation in our Forum. If you have any non-classified publicly available documentation to share, always prefer to send it via PM. Please consult our https://forum.dcs.world/guidelines/.

Regarding your observation. We are aware that the manual you mention doesn't state the Pilot Relief autopilot only tracks a magnetic heading. However, that specific manual is not the only document or reference related to the F/A-18C lot 20 we're simulating. I can guarantee to you this was analysed and we are really reproducing the autopilot limitations correctly. 

Thanks for your care.