No1sonuk Posted November 6, 2022 Share Posted November 6, 2022 Anyone got any idea why this is happening? It looks like the undercarriage is collapsing on takeoff (Taxi is OK), but I can't figure out why. Collision lines and shells are in place on all 3 wheels, and another puzzle is why the tail wheel is part-submerged. Link to comment Share on other sites More sharing options...
western_JPN Posted November 13, 2022 Share Posted November 13, 2022 (edited) Hi, does this trouble still need some help ? The movie looks like main (left and right) gears get damaged and separated in physics calculation, it leads the fuserage sinking .... fuserage doesn't have a collision .... pivot (0, 0, 0) goes under the ground .... exploding judgement is done ! I cannot figure out why gears get damaged. Main wheels' collisions are too low ? not following the suspension's animation shorten by Gravity ? too weak values set in the flightmodel ? Umm .... The tail wheel submerging maybe the mismatch of nose_gear_pos value in the lua. How about decreasing its second (Z position) value ? Or its suspension stroke value (optional in lua) is too big than its animation ? Its default (no value set) stroke maybe fitting to modern jets' nose gear and too big for WWII tail gear. Edited November 16, 2022 by western_JPN Modules: A-10C/II, F-5E, F-14A/B, F-15E, F-16C, F/A-18C, AV-8B, FC3, Ka-50-2/3, UH-1H, Mi-8MTV2, SA342, Mi-24P, AH-64D, P-51D Maps: Nevada, PG, Syria, SA, Sinai, Channel, Normandy2.0 Assets etc.: CA, Sc, WW2AP Mods and Skins in User Files: files/filter/user-is-western0221/ Link to comment Share on other sites More sharing options...
No1sonuk Posted November 13, 2022 Author Share Posted November 13, 2022 It's definitely something to do with the undercarriage collapsing at about 58 to 61 knots. The sink position changes when I alter the main gear collision lines. I have no idea why, but I think it might be related to the tail wheel being sunk. I still have no idea why that's happening either. Link to comment Share on other sites More sharing options...
western_JPN Posted November 13, 2022 Share Posted November 13, 2022 How about removing collisions from undercarriage ? I have less information about collisions and damages , cannot instruct them for you. Modules: A-10C/II, F-5E, F-14A/B, F-15E, F-16C, F/A-18C, AV-8B, FC3, Ka-50-2/3, UH-1H, Mi-8MTV2, SA342, Mi-24P, AH-64D, P-51D Maps: Nevada, PG, Syria, SA, Sinai, Channel, Normandy2.0 Assets etc.: CA, Sc, WW2AP Mods and Skins in User Files: files/filter/user-is-western0221/ Link to comment Share on other sites More sharing options...
No1sonuk Posted November 13, 2022 Author Share Posted November 13, 2022 If I remove all the collision features, it still sinks, but will take off and fly as it takes no damage. Also, I don't have any suspension code in the lua - neither do some other mods I've looked at. Link to comment Share on other sites More sharing options...
No1sonuk Posted November 15, 2022 Author Share Posted November 15, 2022 I'm getting nowhere with this. There's insufficient information, so I've decided to abandon the idea entirely. Link to comment Share on other sites More sharing options...
SkateZilla Posted November 15, 2022 Share Posted November 15, 2022 Change the main and nose/tail gear position in the AC LUA to make the Aircraft sit higher off the ground, Also change the compression strokes for those gears. ie: -Landing Gear Specifics nose_gear_pos = {4.149, -2.140, 0}, --Position in M of Nose Gear, Y, Z, X nose_gear_wheel_diameter = 0.541, -- Diameter in M of Nose Gear nose_gear_amortizer_direct_stroke = 0.000, -- Full Strut Expansion nose_gear_amortizer_normal_weight_stroke = -0.196, -- Strut Weight Compression nose_gear_amortizer_reversal_stroke = -0.393, -- Full Strut Compression main_gear_pos = {-1.662,-2.567, 1.603}, -- Position in M, Y, Z, X for Main Gear Tire, Automatically Mirrored. main_gear_wheel_diameter = 0.802, -- Diameter in M of Main Gear main_gear_amortizer_direct_stroke = 0.000, -- Full Strut Expansion main_gear_amortizer_normal_weight_stroke = -0.532, -- Strut Weight Compression (Distance in Z Axis (Up/Down)) main_gear_amortizer_reversal_stroke = -0.580, -- Full Strut Compression (Distance in Z Axis (Up/Down)) Windows 10 Pro, Ryzen 2700X @ 4.6Ghz, 32GB DDR4-3200 GSkill (F4-3200C16D-16GTZR x2), ASRock X470 Taichi Ultimate, XFX RX6800XT Merc 310 (RX-68XTALFD9) 3x ASUS VS248HP + Oculus HMD, Thrustmaster Warthog HOTAS + MFDs Link to comment Share on other sites More sharing options...
No1sonuk Posted November 15, 2022 Author Share Posted November 15, 2022 Are you sure those coordinates are Y,Z, X, and not X,Z,Y? Link to comment Share on other sites More sharing options...
SkateZilla Posted November 15, 2022 Share Posted November 15, 2022 15 minutes ago, No1sonuk said: Are you sure those coordinates are Y,Z, X, and not X,Z,Y? Yes, Front/Back, Up/Down, Left/Right Windows 10 Pro, Ryzen 2700X @ 4.6Ghz, 32GB DDR4-3200 GSkill (F4-3200C16D-16GTZR x2), ASRock X470 Taichi Ultimate, XFX RX6800XT Merc 310 (RX-68XTALFD9) 3x ASUS VS248HP + Oculus HMD, Thrustmaster Warthog HOTAS + MFDs Link to comment Share on other sites More sharing options...
No1sonuk Posted November 15, 2022 Author Share Posted November 15, 2022 In Max, front/back is +- X. Left/right is +- Y. Link to comment Share on other sites More sharing options...
western_JPN Posted November 16, 2022 Share Posted November 16, 2022 5 hours ago, No1sonuk said: In Max, front/back is +- X. Left/right is +- Y. That looks like not to follow DCS's rule. As SkateZilla wrote, DCS models are in X+ Right / X- Left , Y+ Front / Y- Back , Z+ Up / Z- Down coordinate. Each abc_klm_pos(,,) lines in lua means (Front or Back, Up or Down, Right or Left) ; equaling (Y, Z, X) in model's coordinate. Or ? that orientation mismatch might cause the undercarriage breaking ? not sure not sure ... Modules: A-10C/II, F-5E, F-14A/B, F-15E, F-16C, F/A-18C, AV-8B, FC3, Ka-50-2/3, UH-1H, Mi-8MTV2, SA342, Mi-24P, AH-64D, P-51D Maps: Nevada, PG, Syria, SA, Sinai, Channel, Normandy2.0 Assets etc.: CA, Sc, WW2AP Mods and Skins in User Files: files/filter/user-is-western0221/ Link to comment Share on other sites More sharing options...
No1sonuk Posted November 16, 2022 Author Share Posted November 16, 2022 If I put the model in with x left/right, it goes in game sideways. Link to comment Share on other sites More sharing options...
western_JPN Posted November 16, 2022 Share Posted November 16, 2022 6 hours ago, No1sonuk said: If I put the model in with x left/right, it goes in game sideways. How about applying "Reset XForm" and "Collapse" after rotating the model ? This operation may reset all sub-nodes' orientation. Some reworks or parameter reminds maybe needed. Modules: A-10C/II, F-5E, F-14A/B, F-15E, F-16C, F/A-18C, AV-8B, FC3, Ka-50-2/3, UH-1H, Mi-8MTV2, SA342, Mi-24P, AH-64D, P-51D Maps: Nevada, PG, Syria, SA, Sinai, Channel, Normandy2.0 Assets etc.: CA, Sc, WW2AP Mods and Skins in User Files: files/filter/user-is-western0221/ Link to comment Share on other sites More sharing options...
No1sonuk Posted November 16, 2022 Author Share Posted November 16, 2022 Reset Xform just blew up the model. Link to comment Share on other sites More sharing options...
western_JPN Posted November 17, 2022 Share Posted November 17, 2022 16 hours ago, No1sonuk said: Reset Xform just blew up the model. I know it and advised as : Quote Some reworks or parameter reminds maybe needed. But perhaps it's only way to adjust the model's total coordinate after built in wrong direction. Modules: A-10C/II, F-5E, F-14A/B, F-15E, F-16C, F/A-18C, AV-8B, FC3, Ka-50-2/3, UH-1H, Mi-8MTV2, SA342, Mi-24P, AH-64D, P-51D Maps: Nevada, PG, Syria, SA, Sinai, Channel, Normandy2.0 Assets etc.: CA, Sc, WW2AP Mods and Skins in User Files: files/filter/user-is-western0221/ Link to comment Share on other sites More sharing options...
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