June 10, 200619 yr Hi -It is possible to make an adjustment to the aircraft.cfg file (or .air file) of a specific AI aircraft to make it slow down faster after landing?I have an AI (767-300) that rolls past the taxiway exit it should take and thus turns on the grass some 50 feet or so beyond the exit.Changing the thrust reverser value in the .air file did not make any difference - as it often does in aircraft you actually fly.It is not going to be possible to relocate the exit so am hoping someone can advise regarding having the aircraft slow down more quickly.Thanks in advance for any ideas.David "Ops" Marshall
June 10, 200619 yr I'm not sure if this is what you're looking for - but you could try the FS9 Configurator - it has options to set AI Taxi & Runway Turnoff speeds. I think I downloaded the tool from the library. Also, if the AI aircraft is turning off onto the grass (vs the taxiway), it could mean that something is wrong with the airport's AFCAD file.Just out of curiosity - do you have this problem at all airports - or just a few?
June 10, 200619 yr This is a problem at only one airport. Unfortunately I cannot add another exit 50 feet further down the runway due to interference with some special lighting that is a part of the airport enhancement. I tried it and it does work but the wheels often run over the lights and that just looks wrong.I will take a look at the configurator program - ThanksDavid
June 12, 200619 yr Author Hi,To increase the early deceleration (reverse thrust) make the minimum throttle value (in the general engine section of the aircraft.cfg file) more negative. To increase the late deceleration (brakes), increase the toe brake scalar near the end of the cfg file.Hope this helps,--Tom GibsonCal Classic Propliner Page: http://www.calclassic.comFreeflight Design Shop: http://www.freeflightdesign.comDrop by! ___x_x_(")_x_x___ Tom Gibson CalClassic Propliner Page
June 12, 200619 yr Thanks a million Tom - that did the trick! Now my AI 767 no longer overshoots the exit it needs to take. I will need to tweak th changes to get a good balance between "need" and realism but the basic idea works just fine.BTW - I did try the FSConfiguator and changed the default AI Taxi settings - saw no real change in the behavior of my AI traffic but did discover that making those changes caused other AI problems such as incomplete Point A to Point A circuits. So use that program with caution.David
June 13, 200619 yr Author Hi,No problem, glad to help.Here is my general approach to tweaking AI flight dynamics:Some things you can do - I do these in this order:1. Set the empty weight so the plane makes it's final aproach at the correct speed.2. Increase power (HP or thrust) or wing area to get plane airborne sooner. Also, reduce no flaps stall speed. I usually adjust the stall speed to get the right rotation speed, then the power to get the right climb out speed, and then the wing area to get the right point of rotation. But then changes in wing area will require changes in power, so you adjust these two (or three) back and forth until both rotation point and climb speed are correct.3. Check the cruise speed at altitude and decrease the Cruise Speed and max mach variables if speed is too high. If the speed is too low, try increasing the Cruise Speed. If this has no effect then power is too low. Set Cruise Speed variable to desired value and increase power until it matches that speed. Then redo step 2, not decreasing power below what it is set to now (you can increase it though). This may force a compromise somewhere...4. Adjust the minimum throttle (reverse thrust - early deceleration) and toe brake scalar (brakes - late deceleration) to get the correct landing roll length.Take care,--Tom GibsonCal Classic Propliner Page: http://www.calclassic.comFreeflight Design Shop: http://www.freeflightdesign.comDrop by! ___x_x_(")_x_x___ Tom Gibson CalClassic Propliner Page
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