It's up to you whether you use the mod, part of the mod or not at all. But you will feel the benefit of better steering when taxiing and maybe feel lower friction on wet or icy runways,

 

Here we go...

 

Find the frictions lua file in your FS Modules folder. Load it into an editor. delete all lines containing "ROLLING". Save it.

I've noticed this in flight sim for a long time, the jets move to easily from stand still. In all of the real world planes I've flown, it takes some input to get going. Even on the MD80 as a passenger, I would hear the engines rev up when initially moving then cut to idle as the jet started moving. The 80 manual calls for up to 1.2 EPR max for break away.

 

A maximum of 1.2. That doesn't mean it needs all of that thrust every time.

 

FSX certainly doesn't simulate the effect of tyre deformation but then many full flight sims don't either. I've never taxied anything other than a full flight sim but I've talked about it with Captains who have as part of my work. The subject came up during the qualification of an A320 sim and in that case it became clear that at lighter weights the aircraft might accelerate from static with idle thrust.

 

At the other end of the scale a retired BA 747 captain who was acting as a consultant on our 747 sim told me that only training captains or above were allowed to apply more than 1.05 EPR to move off. So under normal circumstances that would be more than enough. Idle EPR being 1.02.

 

Rolling friction on concrete is typically 0.025 times the weight. That's quite a lot less than the 10% figure you mentioned. However I realise the initial breakaway thrust would need to be more than that if the tyres had been in one position for an extended time.

 

 

A maximum of 1.2. That doesn't mean it needs all of that thrust every time.

I did say up to 1.2 max, just a range.

 

 

 

Rolling friction on concrete is typically 0.025 times the weight. That's quite a lot less than the 10% figure you mentioned.

I think a lot of people under estimate tire flat spots. The DC-10-30 has 12 tires to overcome if you include the two nose tires. It also takes a little more power to get moving from a stand still. After the initial break away, it didn't take as much to get rolling from a stop. You did learn to place the throttles to an ideal position and wait for it to move instead of rushing it with too much power. You would rip up some apron for sure. During my KC10 time, i did see some man hole covers and asphalt ripped up from break away and turning thrust. We did have a guy flip a parked Cessna.

Just a quick update on this. I was at 150,000 pounds the other day and at 24% from a stand still the plane did start rolling but I mean barely. Maybe a couple inches a second. Now its hard to determine if there was any kind of slope at the time because even the slightest downgrade would allow the aircraft to start rolling. Not sure what the plane would have done near its max 156,000 pounds.

I've added that sliding friction to FSUIPC and takes more thrust to move it.

Cool