Bumping this because it's important.

@Cybride Le mieux serait de contacter l'assistance de Just Flight. Ils devraient pouvoir vous aider. Voir : https://community.justflight.com/topic/2/product-support

I created a bug for this in the FS2024 Official forum. Feel free to add to that discussion. https://forums.flightsimulator.com/t/bug-multiple-planes-change-from-nav-to-rol-hdg-mode-when-tracking-vor/762974

Re: the original post (VOR tracking goes from NAV to ROL spontaneously), I created a bug in the FS2024 Official forum. Feel free to add to that discussion. One important piece of info is that it seems only to happen when one is using an external control mapper like Spad.Next or FSUIPC. https://forums.flightsimulator.com/t/bug-multiple-planes-change-from-nav-to-rol-hdg-mode-when-tracking-vor/762974

Yep, you are correct. It was an unused device. Removing its bindings fixed it. Thanks a lot. I would not have guessed in a million years

@alanfernandes said in Bug? Fuel Burn.: Although fuel flows by gravity from the forward to the aft compartment within the main system during refueling, there is no gravity transfer between the auxiliary and main tanks. In flight, this transfer relies exclusively on jet pumps operated by engine motive flow, which renders the fuel in the auxiliary tanks unusable should the pump system fail. I recall discussing this in one of my videos. Here is what I said in the manual: "Most of the fuel in the aft tanks will transfer to the main tanks by gravity, and the rest can be transferred by the aft tank transfer jet pumps. Should the aft tank transfer jet pumps fail, the total usable fuel may be reduced." Here is what the Flight Safety manual says: "Although a small amount of fuel may gravity-feed from the aft tank without the motive-flow system, the pilot should consider all fuel in the aft tank as unusable and plan the flight accordingly." Without looking right now (sorry, I'm leaving to record sound from the Twin Commanders in a few hours), I recall that I assumed this statement was made out of abundance of caution, and implemented the system such that it would slowly equalize to a certain point, so long as the jet pumps had not failed (emulating a blockage). Given the arrangement of the jet pumps and their no-moving-part nature, I assumed that there would be flow through them, so long as the pressure on the auxiliary tank side is high enough.

@taylerf01 Thanks. I assume that means they had to wire the entire annunciator panel power (likely the ground, I would think) through the standby power switch, just to get those two annunciator lights called out in the manual to illuminate for some reason. Thanks for the demo! I'll see if this can be replicated without too much trouble.

Much thanks to you turnandbank! It worked for me. I join in with Black Square Developer with much appreciation for both your discovery of the problem and then letting everyone else in the form here know the cure. Again thanks....

@Black-Square said in STBY ELEC PWR INOP light during preflight: "...before I travel to record sounds for the Twin Commanders."

that looks like a perfect inclusion, thanks for the link!

@C-FJDH said in 13,450lbs - Significance on CG display?: Interesting! But it leads to a question on the implementation of the marker in the tablet. As I read it, the full aft limit is available at all weights. The forward limit is what changes at higher weights. 307 inches aft of datum (farther forward) at lighter weights, but the forward limits is pushed rearward 3 inches for weights above 13,450. I think the marker in the tablet should be near the forward CG limit, not the rear. Old thread, but since Nick may have missed this, I wanted to comment that it appears you're correct. This image is from section 6-27 of the flight manual. The forward CG limit evenly moves rearward after 13,450 lbs. Tablet mistake, indeed. [image: 29297225-5e96-40bc-94e0-76f772417adf.png]

Your welcome. I did let him know you were interested in talking to him - that he could contact you through here or the support staff. I did try to pass a message on to you through a support ticket (95631) about a month ago - so there's a chance not all of those messages are getting through (although I know it's been a BUSY month for you).

@hazzer111 a Comet is already being developed https://msfsaddons.com/2024/11/25/classic-aircraft-simulations-announces-the-de-havilland-comet-4-for-msfs-2024/

I've done that before! I found that ensuring the AT is off and the cycling the AP switches on the OVHD works.

Thanks, this answer a lot of questions for me.

I have same post on reddit about lack of glass cockpit options in MSFS in general. Seems like it requires a lot of work from developers so I doubt that we see anything in near future. However one dude said that he is working on Aspen avionics as an addon and provided couple of screenshots.