Is a panhard bar a solid axle?set TYPE=AXLE, then something like this
[AXLE]
LINK_COUNT=4
ATTACH_REL_POS=0.6298
LEAF_SPRING_LAT_K=300000
J0_CAR=0.555, 0.04, 0.62 ; front half of leaf since rear floats
J0_AXLE=0.555, 0.08, 0.0
J1_CAR=-0.555,0.04,0.62 ; other leaf
J1_AXLE=-0.555, 0.08, 0.0
J2_CAR=0.555, -0.08, 0.62 ; parallel bars for the leaf, allows more squat
J2_AXLE=0.555, -0.04, 0.0
J3_CAR=-0.555,-0.08,0.62 ; other leaf
J3_AXLE=-0.555, -0.04, 0.0
;J4_CAR=-0.555, 0.08, -0.05 ; panhard basically
;J4_AXLE=0.3, 0.08, -0.05
LEAF_SPRING_LAT_K is optional, for cars w/o panhard bar. Link coordinates are relative to the midpoint of the rear axle.
I have a 5th link commented out that would behave like panhard bar.
[AXLE]Oh, it should be pasted in after all the [REAR] section, so it's
(...)
DAMP_FAST_REBOUNDTHRESHOLD=0.075 or whatever's the last line.
[AXLE]
Are they all attached at the car in one line? Are the red and green things in the image all horizontally even?Kinda tricky to explain how solid axle geometry works in general, I think copying 4 links is the way to go to get a reasonable handling car to start with though.
Essentially the inner 2 form a triangle so the axle can't move side to side, and then the outer ones prevent the wheels moving forward/backward while still allowing suspension travel.
It's important that 2 attach at the top and the other 2 the bottom of the axle, that prevents it twisting when you try to accelerate.
I am trying to model a car - de dion rear suspension - in one case with an open differential, and in the other case with a limited slip differential. At present the suspensions.ini file is using [REAR] TYPE=AXLE. Is this the correct suspension type for de dion? I don't see any lines within suspensions.ini that correspond to the differential type, e.g., LSD versus open differential. Any help with this is greatly appreciated.Kinda tricky to explain how solid axle geometry works in general, I think copying 4 links is the way to go to get a reasonable handling car to start with though.
Essentially the inner 2 form a triangle so the axle can't move side to side, and then the outer ones prevent the wheels moving forward/backward while still allowing suspension travel.
It's important that 2 attach at the top and the other 2 the bottom of the axle, that prevents it twisting when you try to accelerate.
What about a watt linkage? Is [AXLE] still the best way to model it?The differential code is all in drivetrain.ini.
de Dion is a case that AC doesn't really handle gracefully with its AXLE implementation, so you'll have to decide on the compromise that you're most comfortable with. I tried a bunch of dumb stuff in the W125 but ended up doing something very similar to what Kunos did in the 250F, feel free to check out the Merc code if you like but it's basically just a 4-link with a panhard rather than the two trailing arms + central sliding locator pin on the diff housing.
Don't neglect to account for the diff in sprung rather than unsprung mass, assuming the de Dion you're implementing is designed as such.