Well, I am sure PMDG designed the T7 with the limitations imposed by MSFS's default friction scalars in mind, but the fact is that using that DynamicFriction lua script - it comes with FSUIPC in the library of example LUA scripts, and you just have to enable it in the FSUIPC.ini file - is causing no problems at all, at least as far as my testing goes.

 

The T7 correctly moves at lower GWs when I relase the parking brake, and requires a touch of throttle when heavier. The fact that this friction "fix" also corrects the sideways friction turns, not only for the T7 but for any aircraft in FSX, operations under crosswinds more plausible.

 

I am yet to find any incompatbility between this fix, in it's "dynamic" mode, and the T7, or any other add-on I use :-)

 

There's not going to be any 'incompatibility' - however, you will see unrealistic takeoff and landing distances using the mod.

Well,

 

The DynamicFriction LUA actually  =restore friction/braking to default when above taxi speed to preserve performance fidelity=

In the downloaded DynamicFriction LUA this speed is set to 30 knots GS,

which means that;

on the takeoff run, once over 30 knots GS, it does nothing,

on landing it does nothing until under 30 knots GS.

That is why it is called DynamicFriction.

 

Using the DynamicFriction LUA with the NGX and I really do not see any noticeable unrealistic short takeoff runs or longer landing distances.

 

Do not rule it out before you have tried it yourself.

 

This very long topic explains it all:

http://forum.avsim.net/topic/392772-inherent-flaw-of-fsx-to-give-too-much-ground-friction/?hl=%20ground%20%20friction

 

Soeren Nielsen

Taxi speeds are a little high with the dynamicfriction lua script and the T7, but that's all I've noticed. As was said above, above 30 knots it doesn't actual change anything as the tweak is reset to default friction levels. You can edit the speeds and even the frictions used in the script if you want, but the settings it comes with are fine as they are.

We did not code the aircraft to use any friction hacks. If you mess with that you're potentially going to see things that don't behave the way we intended as far as braking, takeoff distance etc.

Thanks for the warning, Ryan.  Point taken.

They don't have to code their aircraft to use this friction tweak though, that is the beauty of it, it's dynamic and will not skew PMDG's landing and take-off distances, it only effects taxi speed/break away force and turning/side friction.

We did not code the aircraft to use any friction hacks. If you mess with that you're potentially going to see things that don't behave the way we intended as far as braking, takeoff distance etc.

 

Never mind if you coded the aircraft or not,

the dynamicfriction lua is not a hack, but a workaround of the unrealistic FSX ground friction on taxiing. As Andy mentions above, it does not changes PMDG's landing and take-off distances.

And it does not change anything in your planes configuration. Why don`t you try it?

 

Soeren Nielsen

Here's an idea.

 

PMDG includes this ground friction model within the installer just like they did with RAAS, and develop the take-off and landing distance and everything else involved, with this tweak in mind.

 

Currently we break something else if we install this, but of course there's a way to get both...

Designing a product that changes core files on a customer's computer that MAY impact other 3rd party addons isn't a smart business model.

 

They designed the plane to work with vanilla fsx, as any developer should do.

Adding prerequisites to the install or worse including unwanted changes as a part of the product will drive customers away.

For the last time the dynamicfriction.lua does not change any core files, it patches in memory through FSUIPC dynamically, remove the lua file from the modules folder and its as if it was never there.

in fact dont even need to remove it, just comment it out in your ini file, and it no longer as any effect.

 

Its a great tool, brilliant in the ngx especially. especially good when strong winds on ground, no more of that ridiculous taxining needing to apply constant rudder pressure to keep straight at 15kts! or ramping the throttles up and down. then as all have said, once you take off, the standard FDE that PMDG tailored comes back into effect so normal takeoff and landing.

 

777 with a light load, I can release the breaks, and plane will start to creep forward, just as it would in real life with a light load.

So all you do is place the Dynamic Friction and the Frictions lua's in the FSX modules folder?

There are no FSUIPC config entry's?

After reading the many replies here, I think I may keep an open mind regarding this resource, hack or not.  It's undisputed that the ground friction model in FSX is broken, and I'm not even sure if PMDG addressed this issue in the 777.  It kind of feels like they did to me, but I'm not certain.  Ryan?

 

I can see both side's arguments regarding the lua.  PMDG may not want to be blamed for whatever issues may arise with the use of a hack, and it may be seen as blow to their ego if it does in fact work, as they pride themselves on working around FSX limitations.  If they did indeed account for the ground friction issue and this new method yields a better outcome, it may make them look bad for not considering it in the original design.  At this point who knows, I do hope PMDG is at least looking into this "enhancement", does the proper testing, and offers some kind of conclusive opinion.   I am sick of the ###### poor taxi behavior of FSX, if this tool manages to fix the issue with minimal if any adverse effect on the 777 flight and ground handling dynamics, what's the harm in giving it a shot?  It drives me bonkers having to constantly fiddle with the rudder on a 10 kt taxi because of a 5 kt crosswind, not to mention the myriad issues we run into with sharp turns, etc. 

 

Please PMDG, look into this potential solution. 

+1

 

João Alfredo

Yes. The 777 handles beautifully on the ground. B)

 

Best regards,

Robin.

 

She handles even better in my sleep

Can someone point me to where to get this. As well do you just drop the script into the modules folder? And what do you put in the fsuipc.ini file? I have a registered version. Thanks

 

Sent from Samsung Galaxy Note 2

 

I run this tweak and love it. Like its been mentioned before, at 30 knots all settings remain untouched so your takeoff and landing distance remain as advertised. So no adverse effects. I haven't noticed anything bad on any of my airplanes. You gain so much from this tweak! I've noticed that crosswind landings are realistic now also. No more sliding all over the runway if there's a crosswind.