Engine/aerodynamic problems

[ResidentKind]

Since the latest stable X-Plane 12 release, it is impossible to start the engine manually from cold and dark. The starter cranks the engine, but it's like no fuel is injected (even with mixture full rich, selector on L or R, boost pump on and fuel press at 6 psi...). Starter works after Ctrlling-E and shutting down the aircraft.
In the latest beta, the same thing happens but the starting process still doesn't work after using CTRL-E.
Also, for some reason, fuel pressure gets to 6 psi when the battery is turned on, even without the boost pump on or the engine running...

Lastly, it is impossible to stall spin the aircraft. I can somewhat stall but the aircraft will always pitch down, even while turning. Spins are completly impossible to perform.
I always set my W&B to replicate the weight of my instructor and me and the amount of fuel and cargo we always put in our C23, and the real life vs sim configs are similar, so it is not a CG issue...

Is this normal? Should I enable the experimental flight model?

Thank you!

[ilias.tselios]

Regarding the engine start, I cannot replicate the issue. Please, when happen again, post your Log.txt file for debugging. 

Regarding spins, I am sure that the aircraft behaves correctly up to stalls. Normally should not spin, except you force the plane into stall. Can you please describe the procedure you use in the real aircraft to induce spin, so I can see what's going on?

[ResidentKind]

On 5/30/2025 at 5:26 PM, ilias.tselios said:

Regarding the engine start, I cannot replicate the issue. Please, when happen again, post your Log.txt file for debugging. 

Regarding spins, I am sure that the aircraft behaves correctly up to stalls. Normally should not spin, except you force the plane into stall. Can you please describe the procedure you use in the real aircraft to induce spin, so I can see what's going on?

I'll try with a fresh copy of X-Plane and the C23 (did the plane get an update recently? It might be why I am having issues) and will report back when I have time!

For stalls, I feel like the aircraft pitches down too early. In our C23s, we have to force the aircraft to recover a bit more.
For the spins, we pull and roll the yoke in a direction until the wing on the other side stalls. Recovery is full rudder in the direction opposite to the spin and gradually pulling up once out of the rotation.

 

EDIT: Fresh copy worked, I probably messed something up in the files.

As for spins, I realised that my W&B was probably not helping with the dynamics, as I was way out of the utility category.

Edited 6 hours ago by ResidentKind