dynamic friction with PMDG T7

[cmdn 16]

I am not sure if you guys have noticed but taxiing with the T7 is not really realistic; something wrong with the ground friction model ( with an empty 77W you should be able to taxi without moving the thrust levers which is not the case). 

I have been trying to understand this issue but apprently they can't edit that friction model without getting some serious sideeffects and destroying other parts of the model (I honestly wonder what that is..).

I would just like to use the dynamic friction lua of FSUIPC instead but so far it has not been convincing. Has anynone been able to use that with good results? Perhaps editing the lua file?

[DylanC 181]

From my years working within Aviation, there have always been warnings issued to airlines and ground handlers to be cautious when working near an active 777 gate.  The warnings always stated that in many cases a half to fully loaded 777 takes upwards of 50% power to begin its taxi.  When I worked for AA, our mechanics routinely had briefings about this with the ramp and posted notams for all who traversed near a 777 gate.  The mechanics would always caution even if the plane were empty, there is still some percentage of power needed for the 777 to move.  This was to give caution against flying debris, or driving empty carts or LD3/6s behind a taxiing 777.

All this to say I thought the friction model was pretty good for the PMDG 777.

 

 

 

 

[Christopher Low 5,353]

As a baseline, my PMDG 777F starts any flights with zero payload and medium fuel, and it takes 25% power to get it moving. This is with the (not updated) version of the aircraft.

[cmdn 16]

4 minutes ago, Christopher Low said:

As a baseline, my PMDG 777F starts any flights with zero payload and medium fuel, and it takes 25% power to get it moving. This is with the (not updated) version of the aircraft.

with 0 payload and medium fuel this aircraft should be moving up to 30 kts with the thrust levers on idle position.

[Christopher Low 5,353]

Maybe someone with the updated version of the 777F could test with the same configuration to see if there is any difference?

[cmdn 16]

That would be great. I have been trying to use the fsuipc the dynamic friction lua. I edited a few parameters but it seems that pmdg overrides them. 

 

any workaround?

[Bryn 72]

I thought the FSUIPC friction facilities were removed, because they required hacks that were complicated to update for each version?

[Luke 782]

That was my understanding too. I'd be surprised if they exist in the 64-bit world.

Cheers!

[Bob Scott 7,721]

I wrote that dynamic friction lua script, and it only works in FSX and P3Dv3 (32-bit P3D).  Pete Dowson got away from hacking the internals of the sim with the 64-bit sims and instead relies on Simconnect, and as a result FSUIPC doesn't need to be re-worked (like it used to) every time even a minor release comes out.  The friction offsets are still there, but they do not have any effect in P3Dv4/5.

For the really enterprising amongst you, I think it is still possible to hack the friction tables coded into sim1.dll with a binary file editor, but it can't be done dynamically that way.

[cmdn 16]

11 minutes ago, w6kd said:

I wrote that dynamic friction lua script, and it only works in FSX and P3Dv3 (32-bit P3D).  Pete Dowson got away from hacking the internals of the sim with the 64-bit sims and instead relies on Simconnect, and as a result FSUIPC doesn't need to be re-worked (like it used to) every time even a minor release comes out.  The friction offsets are still there, but they do not have any effect in P3Dv4/5.

For the really enterprising amongst you, I think it is still possible to hack the friction tables coded into sim1.dll with a binary file editor, but it can't be done dynamically that way.

I am not skilled enough to do that. but thanks for letting me know tho.

Are you sure that it does not have any effect on p3d4? A few guys are saying that it works on the pmdg forum. On my side, lua or not it does not change anything with v5.

[Bob Scott 7,721]

1 minute ago, cmdn said:

I am not skilled enough to do that. but thanks for letting me know tho.

Are you sure that it does not have any effect on p3d4? A few guys are saying that it works on the pmdg forum. On my side, lua or not it does not change anything with v5.

Fairly sure...I have not seen anything in Simconnect that exposes the friction tables, and as Simconnect goes, so goes FSUIPC now.

[cmdn 16]

you were right https://forum.simflight.com/topic/92146-dynamic-friction-lua-and-t7/