Post
by EnDSchultz »
Curious, are you running P3D or FSX?
I've noticed some re-surfacing of certain nefarious ground friction issues on all my A2A aircraft since updating my P3D to 2.3, including the lurching you describe, though it may be entirely coincidental.
In any case, yes, A2A planes are pretty much the cream of the crop in terms of immersion and flight characteristics for GA and old military aircraft they've produced thanks to Accusim. Really, nothing else comes close, at least in this particular category of payware FSX aircraft. You've chosen wisely.
Edit: So, I was fooling around aimlessly, reinstalling things, hoping I could get to the bottom of this problem, since it was showing up with all my Accusim aircraft. It was most egregious in the P-51 so that's what I used to do all my testing. What I noticed is that this particular instance seems to involve some sort of hiccup in how thrust was being handled in the sim. A lot of the following is just kind of anecdotal exploration into the guts of how Accusim seems to interact with FSX (from the subjective perspective of someone who can't actually see the code), so for the solution that finally worked for me, feel free to skip to the end.
I was sitting on the ramp in the P-51, and tried to find how much power it took to get rolling. It seemed to be about 1300RPM. The aircraft would start to creep forward as the brakes came off, and then dramatically lurch into motion, then proceeded to accelerate very gently. So I applied the brakes and stopped, not touching the throttle. Sitting in the cockpit view the whole time, the sound of the engine was the constant drone of 1300RPM.
However, sitting there with the brakes applied, I switched to the external view, and noticed the engine was blaring as if it were running at a much higher power setting. Odd. I hadn't touched the throttle, and the cockpit reveals I'm still at 1300RPM. I switched back to the external view, and let off the brakes. Again the aircraft lurched, but then, the sound of the engine in the external view dropped off and produced the idling sound as the aircraft settled into a gentle taxi. I applied the brakes, came to a stop, and once again the sound in external view revved up to something that did not correlate at all to the power setting: The whole time I had not touched the throttle.
Now, I know that Accusim uses its own system to handle sound within the cockpit, and so at 1300RPM, that's exactly what I heard. However, the external view is entirely stock FSX, and unlike the cockpit, the sound played in external view seems to correlate not directly to the power setting, but the amount of thrust Accusim is commanding FSX to put out. I had somewhat noticed this in all instances where I made sudden power changes: the apparent acceleration of the aircraft (eyeballing the red FSX airspeed readout) did not correlate with the sound of the engine in the interior, but rather the sound produced when in an external view.
My solution: tl;dr, what I ended up doing pretty much randomly was run the Simconnect.msi included in the P3D redist folder. I fired up P3D and the lurching was gone in the P-51, the Cherokee, and yes, the 172. Running the above test, the anomalous engine sounds in external view were gone. The engine would sound as if it were idling the whole time when set to 1300RPM, and would smoothly creep into motion as expected when the brakes were released. Additionally, my issues with getting stuck when on rough surfaces (even at max power) disappeared as well. Don't know if this will work for you, but presumably it can't hurt to try.
). I had thought it was updated because it was displaying some of the signs of the updates. Obviously I should've just run the updater anyway haha.