Lua dynamic friction

[cmdn]

Hello,

.

I just set the dynamic friction lua file for fsuipc. Everything works good but I would like to modify the ground friction default setting with the dynamic friction file (with text edit). How can I do that? which values I have to modify? I would like that the plane goes more slowly on the taxiway. I'm using the AXE A320/321;

 

I show you what I see on the dynamic friction file, thanks in advance for your answer.

 

 

-- This sets frictions according to recommendations by Johan Dees, early December 2012

 

-- Modded by Bob Scott to restrict wheel and brake reduced rolling friction effects to taxi speeds

-- in order to preserve FDE-driven TOLD performance (on hard-surfaces only)

 

ipc.RestoreFriction()

 

-- The original FSX values are shown in the comment at the end of each code line

 

ipc.SetFriction(WHEEL, CONCRETE, ROLLING, DRY, 0.030) --0.050

ipc.SetFriction(WHEEL, GRASS, ROLLING, DRY, 0.060) --0.080

ipc.SetFriction(WHEEL, GRASS_BUMPY, ROLLING, DRY, 0.070) --0.090

ipc.SetFriction(WHEEL, ASPHALT, ROLLING, DRY, 0.025) --0.050

ipc.SetFriction(WHEEL, SHORT_GRASS, ROLLING, DRY, 0.050) --0.060

ipc.SetFriction(WHEEL, LONG_GRASS, ROLLING, DRY, 0.060) --0.090

ipc.SetFriction(WHEEL, DIRT, ROLLING, DRY, 0.050) --0.060

ipc.SetFriction(WHEEL, GRAVEL, ROLLING, DRY, 0.060) --0.080

ipc.SetFriction(WHEEL, BITUMINUS, ROLLING, DRY, 0.030) --0.050

ipc.SetFriction(WHEEL, MACADAM, ROLLING, DRY, 0.030) --0.050

ipc.SetFriction(WHEEL, TARMAC, ROLLING, DRY, 0.030) --0.050

 

ipc.SetFriction(WHEEL, CONCRETE, SLIDING, DRY, 1.000) --0.640

ipc.SetFriction(WHEEL, GRASS, SLIDING, DRY, 0.800) --0.640

ipc.SetFriction(WHEEL, GRASS_BUMPY, SLIDING, DRY, 0.800) --0.640

ipc.SetFriction(WHEEL, ASPHALT, SLIDING, DRY, 0.950) --0.640

ipc.SetFriction(WHEEL, SHORT_GRASS, SLIDING, DRY, 0.800) --0.640

ipc.SetFriction(WHEEL, LONG_GRASS, SLIDING, DRY, 0.800) --0.640

ipc.SetFriction(WHEEL, DIRT, SLIDING, DRY, 0.800) --0.640

ipc.SetFriction(WHEEL, GRAVEL, SLIDING, DRY, 0.800) --0.640

ipc.SetFriction(WHEEL, BITUMINUS, SLIDING, DRY, 1.000) --0.640

ipc.SetFriction(WHEEL, MACADAM, SLIDING, DRY, 0.950) --0.550

ipc.SetFriction(WHEEL, TARMAC, SLIDING, DRY, 1.000) --0.640

 

ipc.SetFriction(BRAKE, CONCRETE, ROLLING, DRY, 0.900) --0.700

ipc.SetFriction(BRAKE, GRASS, ROLLING, DRY, 0.700) --0.500

ipc.SetFriction(BRAKE, GRASS_BUMPY, ROLLING, DRY, 0.650) --0.400

ipc.SetFriction(BRAKE, ASPHALT, ROLLING, DRY, 0.900) --0.700

ipc.SetFriction(BRAKE, SHORT_GRASS, ROLLING, DRY, 0.650) --0.500

ipc.SetFriction(BRAKE, LONG_GRASS, ROLLING, DRY, 0.650) --0.500

ipc.SetFriction(BRAKE, GRAVEL, ROLLING, DRY, 0.650) --0.500

ipc.SetFriction(BRAKE, BITUMINUS, ROLLING, DRY, 0.900) --0.700

ipc.SetFriction(BRAKE, MACADAM, ROLLING, DRY, 0.900) --0.700

ipc.SetFriction(BRAKE, TARMAC, ROLLING, DRY, 0.900) --0.700

 

 

--restore friction/braking to default when above taxi speed to preserve FDE performance fidelity

 

taxi_spd = 30 --changeover threshold in knots groundspeed

cur_status = 1

while 1 do

 

GS_ipc = ipc.readSD(0x2B4)

GS = GS_ipc / 65536.0 * 1.94384 --groundspeed in knots

if GS < taxi_spd

  then 

    slow = 1

  else 

    slow = 0

end

 

if cur_status ~= slow   -- threshold was crossed

  then

    cur_status = slow

    if slow

      then

        ipc.SetFriction(WHEEL, CONCRETE, ROLLING, DRY, 0.025)

        ipc.SetFriction(WHEEL, ASPHALT, ROLLING, DRY, 0.030)

        ipc.SetFriction(WHEEL, BITUMINUS, ROLLING, DRY, 0.030)

        ipc.SetFriction(WHEEL, MACADAM, ROLLING, DRY, 0.030)

        ipc.SetFriction(WHEEL, TARMAC, ROLLING, DRY, 0.030)

        ipc.SetFriction(BRAKE, CONCRETE, ROLLING, DRY, 0.900)

        ipc.SetFriction(BRAKE, ASPHALT, ROLLING, DRY, 0.900)

        ipc.SetFriction(BRAKE, BITUMINUS, ROLLING, DRY, 0.900)

        ipc.SetFriction(BRAKE, MACADAM, ROLLING, DRY, 0.900)

        ipc.SetFriction(BRAKE, TARMAC, ROLLING, DRY, 0.900)

      else --restore to defaults when above taxi spd

        ipc.SetFriction(WHEEL, CONCRETE, ROLLING, DRY, 0.050)

        ipc.SetFriction(WHEEL, ASPHALT, ROLLING, DRY, 0.050)

        ipc.SetFriction(WHEEL, BITUMINUS, ROLLING, DRY, 0.050)

        ipc.SetFriction(WHEEL, MACADAM, ROLLING, DRY, 0.050)

        ipc.SetFriction(WHEEL, TARMAC, ROLLING, DRY, 0.050)

        ipc.SetFriction(BRAKE, CONCRETE, ROLLING, DRY, 0.700)

        ipc.SetFriction(BRAKE, ASPHALT, ROLLING, DRY, 0.700)

        ipc.SetFriction(BRAKE, BITUMINUS, ROLLING, DRY, 0.700)

        ipc.SetFriction(BRAKE, MACADAM, ROLLING, DRY, 0.700)

        ipc.SetFriction(BRAKE, TARMAC, ROLLING, DRY, 0.700)

    end

end

 

 

ipc.sleep(999)

end --loop indefinitely

 

regards 

christopher M

[Andydigital]

The easiest thing to try is to change the changeover speed first, change the speed (red) in the line below to 20 or 25 and see if that helps.

 

taxi_spd = 30 --changeover threshold in knots groundspeed

[cmdn]

The easiest thing to try is to change the changeover speed first, change the speed (red) in the line below to 20 or 25 and see if that helps.

 

taxi_spd = 30 --changeover threshold in knots groundspeed

I tried it but it does not change the plane accelerate in the same way.

[cmdn]

Do you have any solutions?

[Andydigital]

I don't unfortunately no, you would be better placed asking the user "W6KD" on the AVSIM forums about it as he is the person who wrote this dynamic script.