[SU15] Is Center Wheel rpm or Center wheel rotation angle - not working? (added IS GEAR XXX wrong)

[MSFS 2020] Bug Reports SDK: Tools/Samples/Documentation
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Version: SU15 - 1.37.16.0

Frequency: Consistently

Severity: *High

Context: *building an aircraft with tire animation named Gear_Ceneter_Tire, the gear_left_tire and gear_right_tire animations work
Bug description:

Sim Vars Center wheel rotation angle and Center wheel Rpm are always zero, expect them to work like left and right do.

Repro steps: Build an aircraft in blender - set animation of three tires KF0- 0deg, kf 1- 90 kf 2 - 180 kf 3-270 kf 4-360 - on left right and center.

Use the project template for piston single aircraft in the project build.

left right work - center does not.

Are left right center deprecated?

Wheel rotation:0 and wheel rpm:0 do the same. I don’t see any errors in behaviors or the model build process. But I must be doing something wrong, What should I check?

Question was asked and never answered in 2022

Attachments:

DA40CGDFQ_2024.05.02_18h48m27s
DA40CGDFQ_2024.05.02_18h48m27s834×323 17.2 KB

DA40CGDFQ_2024.05.02_19h2m39s
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[FIXED] Nose Wheel, Steer and Gear Animation not working in Simulator
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I am doing a tutorial on external animations. Most things work, I built my project based on the piston engine templates in the devmode folder.

These templates DO NOT have the flt files that would normally be associated to the aircraft. The samples aircraft projects do, however the templates located in devmode folder do not.

PLease add the flt files from the samples to the template folder.

DA40CGDFQ_2024.05.05_13h49m6s
DA40CGDFQ_2024.05.05_13h49m6s826×424 23.1 KB

An aside to this wheel issue - the SIM vars

IS GEAR XXX are NOT booleans but seem to be a bit mapped enumeration. - see the simvar watcher.

DA40CGDFQ_2024.05.05_13h54m40s
DA40CGDFQ_2024.05.05_13h54m40s926×715 42 KB

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I found this on a discord site.

If the Center gear X (Lateral) value in the contact points is not ZERO, the gear will not work, Retraction and tire rotation no longer works.

The fix is to set the lateral X value to zero.

EDIT: the reason that the X value changed is due to grabing the YZ plane on the gizmo - which should make the X remain at the current value - changes the x to .0004 - this is enough to make the center gear not work.

EDIT 2 : the template file for the piston aircraft has this error/bug built into


[CONTACT_POINTS]
static_pitch = 0.7 ; degrees, pitch when at rest on the ground (+=Up, -=Dn)
static_cg_height = 3.34 ; feet, altitude of CG when at rest on the ground
gear_system_type = 5 ; gear system type (betweeen 0 and 4) 0 = electrical, 1 = hydraulic, 2 = pneumatic, 3 = manual, 4 = none, 5 = undefined
tailwheel_lock = 0 ; Is tailwheel lock available TRUE/FALSE
max_number_of_points = 9 ; Number of contact points
point.0 = 1,-18.455954,-0.411437,-3.253088,1500,0,0.5,22,0.25,2.5,0.7,0,0,0,0,0
point.1 = 1,-3.619104,-4.000042,-4.565986,3500,1,0.5,0,0.3,2.5,0.7,0,0,2,0,0
point.2 = 1,-3.619104,4.000042,-4.565986,3500,2,0.5,0,0.3,2.5,0.7,0,0,3,0,0
point.3 = 2,-3.9,-15.892881,-0.215125,1800,0,0.0001,0,0.0001,0.0001,0,0,0,5,0,0
point.4 = 2,-22.178221,-0.000001,4.287341,1800,0,0.0001,0,0.0001,0.0001,0,0,0,9,0,0
point.5 = 2,-22.722601,-0,0.148033,100,0,0.0001,0,0.0001,0.0001,0,0,0,4,0,0
point.6 = 2,-3.9,15.892881,-0.215125,1800,0,0.0001,0,0.0001,0.0001,0,0,0,8,0,0
point.7 = 2,5.017279,0,0.156021,0,0,0.0001,0,0.0001,0.0001,0,0,0,0,0,0
point.8 = 2,4.4,0,0.9,0,0,0.0001,0,0.0001,0.0001,0,0,0,0,0,0
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To add to this bug that still has not been confirmed to be a bug is that if the use has a reference_datum_position parameter with the x value NOT zero then the center tire animations will not work. AGAIN the AE did this - if you move things in a plane along the long axis the x value will change ever so slightly to cause issues.

Is this a bug?

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5

I confirm what DA40CGDFQ says. I’m developing a plane with a slightly eccentric front wheel and if the value of X isn’t zero, the wheel won’t turn.
I’m developing on msfs 2024
Is there a solution to avoid this kind of problem?

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Thank you DA40CGDFQ! I was pulling my hair out wondering why my nose gear suddenly stopped operating when I was SURE it had been working already. Yep, had moved it with the gizmo trying to get the suspension dialed in, my X was -0.000356. Such a miniscule amount stopping the whole animation working and even the GEAR ANIMATION POSITION:0 variable working! What’s even worse, I was looking at the Debug Aircraft Wheels debug display and the animation was shown properly going to 50% there when lowering the gear!

And the console shows no error, no warning when building your plane. @Boris @FlyingRaccoon any update on this? Such a tiny thing breaking an animation is terrible.

Edit. Just realised it’s been well over a year with this.

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Sorry to necro this thread but I’d like a quick bit of advice.

Given rotating a wheel is about as simple as an animation can get, if that’s within a developer’s capabilities is there any advantage in using the admirable MSFS template library to find something that approximates the function needed? Sorry if this is an obvious question but rotating a wheel on the ground isn’t an important function of my planes and I’m thinking it’ll be less vulnerable just to have a code block “if on ground rotate wheel at to ground speed”.

Minor aside - I’m wondering if the template nose-wheel rotate (rolling not steering) actually takes into account the radius of the turn. Not an issue in my gliders anyway…

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A bit late to the party, but a note was added regarding contact point configuration and the impact order has:

Regards,
Sylvain

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