JMB VL-3 Impossible to control on ground

ISSUE DESCRIPTION

The JMB VL-3 is completely unmanageable on the ground. Even if I set the throttle lever to zero, the aircraft accelerates on its own as if it had power. I never encountered this bug before Sim Update 3, and I had flown it several times. As usual, the Sim Update hasn’t fixed ANY of the issues I had seen before, but it has introduced new bugs, just like it happened with Sim Update 2.

Something similar happens with the Flight Design CTSL. It’s also unmanageable on the ground. What the hell is going on? Is every Sim Update going to make everything work worse? What kind of bad joke is this?

This game is a bigger disappointment with each passing day.

FREQUENCY OF ISSUE

Currently, always

REPRODUCTION STEPS

Please list clear steps you took in order to help our test team reproduce the same issue:

  1. Simply try to drive these aircraft. They are impossible to manage

YOUR SETTINGS

Nothing special. No mods.

What peripherals are you using, if relevant:

Jostick, quadrant and pedals.

[PC Only] Are you using Developer Mode or have you made any changes to it?

No

[PC, MSFS 2020 Only] Are you using DX11 or DX12?

PC, DX12

[PC Only] What GPU (Graphics Card) do you use?

NVidia RTX 4070 Ti super

[PC Only] What other relevant PC specs can you share?

MEDIA

Please add a screenshot or video of the issue occurring.

I second this issue, though I’ve found the JMB to be moderately better if you drop the RPM controls all the way down to 0%, but that hardly seems realistic/how it’s meant to be used.

After re-installing MSFS, the problem of automatic acceleration disappeared.

Anyway, the problem with stability persists. Very light aircraft are impossible to manage on ground. It’s like they get pushed around by the slightest breeze. They constantly veer off course, don’t respond well to turns, and roll over extremely easily.

Interesting - I’ll go ahead and do a soft-reinstall and see if that fixes it on my end as well.

With all realism levels set to maximum, and after making a landing without deploying the landing gear, with the engine completely at idle. This is what some consider a good simulation.

Can anybody explain to me what the hell is this??

By the way, this didn’t happen before Sim Update 3.

And by the way, it accelerates on its own again.

It’s absolutely impossible to manage this on the ground. Curiously, its behavior in flight is more or less as before. But on the ground it is absolutely surreal.

I’m not bothered by Flight Simulator having bugs. What really gets me is that after three updates focused on fixing “odd crashes in very specific circumstances” and “texture issues in highly specific locations,” the sim is now a complete mess where it matters most: flying a small airplane.

Was this truly not identified during the months of testing for Sim Update 3?

No one reported it on these forums from what I can see, no. As a beta tester myself, I do make an effort to try out as many aircraft as possible, but there’s no way to catch them all unfortunately.

Ok, so flight design CSTL or JMB VL-3 are two of the models that are currently impossible to manage, at least for me, on the ground. I heard also about the Icon A-5, but I didn’t test it. What I see is that it happens specially with very light planes. Cessna 172 looks good, but I didn’t dedicate much time to it.

What you see in the video I sent is something new for me. But driving the aircraft on the ground is quite basic, and currently I can’t do it. I tried both with different devices, jostick and pedals.

Notice how the aircraft accelerates on its own even though the power lever is at idle. Second, observe how very small turns create inertia to one side or the other, making the airplane uncontrollable. It is absolutely impossible to keep even a minimally straight line.

Notice how, when accelerating, the aircraft also veers off with strong inertia. At times it even tips over. It is impossible to keep it straight.

I have similar problems. My main issue is that when I steer, the plane tips over and crashes. It used to do it in FS2020 if you tried to turn whilst taxing too fast, but now it does it at walking pace, meaning it’s impossible to taxi the aircraft. Annoyingly this is the main plane I fly and always has been.

This is just WOW! Although it’s not the same bug we are talking about here. That one deserves a bug report on it’s own. I have never seen that before, has it happened again? Can you reproduce it with another video?

The issue is due to the unlocked front gear:

@Mutadeus : I don’t see the same issue with the CTSL, the fix front gear is controllable during low speed taxiing.

Interesting, indeed.

Is there any solution for it?

Can I lock the gear?

I have not seen a solution, workaround or a switch to lock the gear.
In FS2020 the front gear is correctly locked.
It is a PS5 user that reported the issue (in a restricted PS5 category) but it their case, the issue is only visual and apparently aircraft still controllable.

In any case, the problem came with the Sim Update 3. I had been flying this aircraft without problems the weeks before.

Let’s see if it gets fixed in Sim Update 4, but given how few votes this bug has, I have a feeling it’s going to stay like this for a long time.

Yes, I remember not having this taxiing issue and it started prior SU4. I am in SU4 and it is not fixed so far.

That’s interesting (PS5 showing an unlocked front wheel, but it not affecting taxiing). I wonder if that hints at simpler underlying physics on the PS5 compared to PC? (or maybe that’s something dedicated simmers on this forum already know? If so I’d be interested to know too).

The overpowered at idle should be fixed in SU7:

The other issue commented in this report related to bad taxi behaviour should also be fixed in SU7. See corresponding report:
JMB VL-3 Rolls and crashes every time you turn when taxiing - #5 by DementedCorn327