I've tried searching, and either I can't find the right syntax, or when I do, I'm too tired to figure things out, but I'm having drive shaft issues with my semi... Looking for info on how to stop it from happening, please and thanks!
I used a modded D series and the driveshaft instantly broke on a light bump. Of course the car was lowered to begin with, but I would think the shaft could last much longer.
It might have something to do with chassis flex.. At least on the semi... I haven't found anything related to u-joint or driveshaft strength anywhere, as of yet.
Its in the semi_suspension_R jbeam. Here is a version of a "HD" driveshaft for my semi "performance" package. Code: }, "semi_driveshaft_josh": { "information":{ "authors":"BeamNG", "name":"HD Driveshaft", "value":550, } "slotType" : "semi_driveshaft", "flexbodies": [ ["mesh", "[group]:", "nonFlexMaterials"], ], "props": [ ["func" , "mesh" , "idRef:", "idX:", "idY:", "baseRotation" , "rotation" , "translation" , "min", "max", "offset", "multiplier",], ["driveshaft", "semi_driveshaft", "ra1","tra1","ra1ref", {"x":0, "y":0, "z":90}, {"x":0, "y":1, "z":0} , {"x":0, "y":0, "z":0}, -360, 360, 0, 1,{"deformGroup":"semi_driveshaft"}], ], "nodes": [ ["id", "posX", "posY", "posZ"], ["ra1ref", 0, 0.81, 0.6,{"collision":false,"selfCollision":false,"nodeWeight":5.1}], ], "beams": [ ["id1:", "id2:", "options"], {"beamPrecompression":1, "beamType":"|NORMAL", "beamLongBound":1, "beamShortBound":1}, //ref node {"beamSpring":9000800,"beamDamp":80}, {"beamDeform":300000,"beamStrength":"FLT_MAX"} ["ra2l","ra1ref"], ["ra2r","ra1ref"], ["ra1","ra1ref"], {"beamPrecompression":1.0, "beamType":"|BOUNDED", "beamLongBound":0.01, "beamShortBound":0.01}, {"beamSpring":0,"beamDamp":0,"beamDeform":2000,"beamStrength":4000}, {"beamLimitSpring":10001000,"beamLimitDamp":1000}, ["tra1","ra1",{"name":"driveshaft","deformGroup":"semi_driveshaft"}], ], }
Unfortunately, it doesn't seem to help... I'll keep trying different beamSpring numbers, but adding a 1 in front of yours didn't help, lol. The only way I've gotten it to last, is to either lower the power, or reduce the tire grip... But then I don't get my awesome wheelies, lol. --- Post updated --- I don't want to cut power or traction, lol. Here's my Engine specs: Code: "semi_engine_I6": { "information":{ "authors":"BeamNG", "name":"DMFP I6 BFT Diesel Engine", "value":8000, } "slotType" : "semi_engine", "slots": [ ["type", "default", "description"] //engine ["semi_transmission","semi_transmission_12M", "Transmission"], ["semi_exhaust","semi_exhaust", "Exhaust"], ], "enginetorque":[ ["rpm", "torque"] [0, 0], [200, 1305], [500, 1505], [750, 1755], [1000, 2195], [1200, 2195], [1500, 2192], [1800, 2180], [2200, 2185], [2500, 2285], [3000, 2285], [3500, 2385], [4000, 2385], [4500, 2485], [4750, 2605], [5000, 2705], [5500, 2855], [6000, 2955], [6500, 3055], [7000, 0], ], "turbocharger": { "wastegateStart":100, "wastegateLimit":104, "maxExhaustPower": 25000, "backPressureCoef": 0.000065, "bovEnabled":false, "bovSoundVolumeCoef": 0.0 "frictionCoef": 1.5, "inertia":18, "pressurePSI":[ //turbineRPM, pressure(PSI) [0, -1], [30000, 10], [60000, 18], [90000, 37], [150000, 51], [200000, 59], [250000, 68], [300000, 77], [350000, 86], [400000, 95], [450000, 104], ], "engineDef":[ //engineRPM, efficiency, exhaustFactor [0, 0.2, 0.0], [250, 0.6, 0.55], [500, 0.9, 0.9], [800, 0.9, 0.9], [1400, 0.9, 0.9], [1800, 0.9, 0.9], [2200, 0.9, 0.9], [2800, 0.9, 0.9], [3200, 0.9, 0.9], [3800, 0.9, 0.9], [4200, 0.9, 0.9], [4800, 0.9, 0.9], [5500, 0.9, 0.9], [6000, 0.9, 0.9], [6500, 0.85, 0.85], [7000, 0.7, 0.7], ], }, "engine":{ "idleRPM":650, "shiftDownRPM":3300, "shiftUpRPM":5000, "maxRPM":7000, "revLimiterRPMDrop":0, "inertia":10, "friction":150 "brakingCoefRPS":5 "burnEfficiency":0.22 "throttleSensitivity":1 "torqueReactionNodes:":["en1l","en2l","en4r"] Transmission: Code: "semi_transmission_12M": { "information":{ "authors":"DMFP", "name":"18/5-Speed Manual Transmission", "value":15000, } "slotType" : "semi_transmission", "engine":{ "transmissionType":"manual" //18 forward gears, 5 reverse gears "gears":[-1.78, -2.62, -3.73, -5.16, -10.40, 0, 10.40, 8.6, 7.26, 5.16, 4.2, 3.74, 3.15, 2.73, 2.38, 2.04, 1.88, 1.62, 1.37, 1.25, 1.15, 1.07, 1.00, 0.921] "clutchDuration":0.001 "clutchTorque":15000 }, Tires: Code: { "semi_tire_R_1": { "information":{ "authors":"BeamNG", "name":"Heavy Duty Front Rear Tires", "value":1000, } "flexbodies": [ ["mesh", "[group]:", "nonFlexMaterials"], ["tire_02a_22x10_41", ["wheel_RR_1","tire_RR_1"], [], {"pos":{"x":-0.739, "y":1.46, "z":0.45}, "rot":{"x":0, "y":0, "z":0}, "scale":{"x":1, "y":1, "z":1}}], ["tire_02a_22x10_41", ["wheel_RL_1","tire_RL_1"], [], {"pos":{"x": 0.739, "y":1.46, "z":0.45}, "rot":{"x":0, "y":0, "z":0}, "scale":{"x":1, "y":1, "z":1}}], ["tire_02a_22x10_41", ["wheel_RR_1","tire_RR_1"], [], {"pos":{"x":-1.069, "y":1.46, "z":0.45}, "rot":{"x":0, "y":0, "z":0}, "scale":{"x":1, "y":1, "z":1}}], ["tire_02a_22x10_41", ["wheel_RL_1","tire_RL_1"], [], {"pos":{"x": 1.069, "y":1.46, "z":0.45}, "rot":{"x":0, "y":0, "z":0}, "scale":{"x":1, "y":1, "z":1}}], ], "slotType" : "semi_tire_R_1", "pressureWheels": [ ["name","hubGroup","group","node1:","node2:","nodeS","nodeArm:","wheelDir"], {"enableTireLbeams":true,"disableMeshBreaking":false,"disableHubMeshBreaking":false}, //general settings {"radius":0.53}, {"tireWidth":0.57}, {"numRays":14}, //tire options {"wheelSideBeamSpring":21000,"wheelSideBeamDamp":64}, {"wheelSideBeamSpringExpansion":1101000,"wheelSideBeamDampExpansion":80}, {"wheelReinfBeamSpring":91000,"wheelReinfBeamDamp":120}, {"wheelTreadBeamSpring":351000,"wheelTreadBeamDamp":200}, {"wheelPeripheryBeamSpring":501000,"wheelPeripheryBeamDamp":80}, //deform values {"wheelSideBeamDeform":78000,"wheelSideBeamStrength":82000}, {"wheelReinfBeamDeform":78000,"wheelReinfBeamStrength":82000}, {"wheelTreadBeamDeform":78000,"wheelTreadBeamStrength":96000}, {"wheelPeripheryBeamDeform":78000,"wheelPeripheryBeamStrength":96000}, //general tire values {"nodeWeight":1.63}, {"nodeMaterial":"|NM_RUBBER","hasTire":true}, {"frictionCoef":225.20}, {"triangleCollision":true}, {"pressurePSI":50}, {"maxPressurePSI":240}, {"dragCoef":20}, ], } "semi_tire_R_2": { "information":{ "authors":"BeamNG", "name":"Heavy Duty Rear Rear Tires", "value":1000, } "flexbodies": [ ["mesh", "[group]:", "nonFlexMaterials"], ["tire_02a_22x10_41", ["wheel_RR_2","tire_RR_2"], [], {"pos":{"x":-0.739, "y":2.79, "z":0.45}, "rot":{"x":0, "y":0, "z":0}, "scale":{"x":1, "y":1, "z":1}}], ["tire_02a_22x10_41", ["wheel_RL_2","tire_RL_2"], [], {"pos":{"x": 0.739, "y":2.79, "z":0.45}, "rot":{"x":0, "y":0, "z":0}, "scale":{"x":1, "y":1, "z":1}}], ["tire_02a_22x10_41", ["wheel_RR_2","tire_RR_2"], [], {"pos":{"x":-1.069, "y":2.79, "z":0.45}, "rot":{"x":0, "y":0, "z":0}, "scale":{"x":1, "y":1, "z":1}}], ["tire_02a_22x10_41", ["wheel_RL_2","tire_RL_2"], [], {"pos":{"x": 1.069, "y":2.79, "z":0.45}, "rot":{"x":0, "y":0, "z":0}, "scale":{"x":1, "y":1, "z":1}}], ], "slotType" : "semi_tire_R_2", "pressureWheels": [ ["name","hubGroup","group","node1:","node2:","nodeS","nodeArm:","wheelDir"], {"enableTireLbeams":true,"disableMeshBreaking":false,"disableHubMeshBreaking":false}, //general settings {"radius":0.53}, {"tireWidth":0.57}, {"numRays":14}, //tire options {"wheelSideBeamSpring":21000,"wheelSideBeamDamp":64}, {"wheelSideBeamSpringExpansion":1101000,"wheelSideBeamDampExpansion":80}, {"wheelReinfBeamSpring":91000,"wheelReinfBeamDamp":120}, {"wheelTreadBeamSpring":351000,"wheelTreadBeamDamp":200}, {"wheelPeripheryBeamSpring":501000,"wheelPeripheryBeamDamp":80}, //deform values {"wheelSideBeamDeform":78000,"wheelSideBeamStrength":82000}, {"wheelReinfBeamDeform":78000,"wheelReinfBeamStrength":82000}, {"wheelTreadBeamDeform":78000,"wheelTreadBeamStrength":96000}, {"wheelPeripheryBeamDeform":78000,"wheelPeripheryBeamStrength":96000}, //general tire values {"nodeWeight":1.63}, {"nodeMaterial":"|NM_RUBBER","hasTire":true}, {"frictionCoef":225.20}, {"triangleCollision":true}, {"pressurePSI":50}, {"maxPressurePSI":240}, {"dragCoef":20}, ], } }
Why is the driveshaft breaking? I assume that it's either being: bent, over-compressed, or over-extended. My advice? Turn on node names and beam visualization and find the driveshaft. Turn on 16x or 100x slow-motion and do a launch. Observe what bad thing happens to the driveshaft. Observing that stuff will set you up to understand what's happening better, but you could also just start playing with the bounds to see if it's over-compressing or over-extending. The JBEAM code which Josh posted can handle only 1% expansion or contraction - so maybe 2-3cm depending on the length of the shaft? Don't forget this documentation: http://wiki.beamng.com/JBeam_Reference
Dude you do not need 225 friction coef. When i make drag cars that do instawheelies i put it as high as maybe 7 or 8 not 200
That's a fair point (I have actually been using 3.25 on the standard Wheelie Monster with optional 4.2's) but I FWIW don't think this is related to the driveshaft problem. The game doesn't currently (0.5.6.1) support torque breaking the driveshaft - only those three things I mentioned in my post above.
Thanks torsion! It was in fact the driveshaft not being able to lengthen itself out enough... The intermediate shaft between differentials looked like it was hitting 45+ degrees of angle before it let go... Increased the LongBound and she's golden... The friction coef was more a random number because I didn't want them to spin, lol. And they the back end of the T75 5th wheel gets pretty loose at 170MPH around the loop on the grid map with 25 and lower, lol I just hammered in big power while keeping the existing handling characteristics... Keeping it simple for now
I agree. Do you plan on releasing your mod on the Mods DB? FWIW several people have asked me to do something similar.
I probably should, lol. Just gotta get around to reading up on how to make it work in a package, and if I have to upload the whole zip or just the jbeams and such. I don't usually think about it much, lol
If you've got things working in-game you can only be so far away from being able to package them up. OTOH if your modifications are currently to stock parts (eg they replace/change stock parts) then moving those over to custom parts so that they don't interfere with the base game is probably going to be your largest challenge.
That'd be it, yep, lol, I'd like it to be a drop down option in the menu for the semi, which, in theory, I should be able to do with a mod... I know I can do it with modded stock files
Take a look at my mod to the D15 for reference if you'd like. The Pickup/Roamer use "common files" more extensively than the Semi probably does, but it's basically the same idea.
You'd want to separate your modified parts off into their own separate file. Package those up standalone. Your mod would be turned down from repo if it interfered with base game parts.
