For this reason I think some competition would be "healthy" :)

Well i can add here that i am a student pilot in real life and spend 5 days a week in a Cessna 172M. Today we taxiied at total idle speed. yesterday we bumped it a bit. Monday i believe i had to get her up to 1500 RPM to get her moving then brought her back to idle. So . . . it's a LOT of factors pending -- tempurature, weather, wind direction and speed, number of persons in the airplane (I had a friend ride with us yesterday for his first ever plane ride and it took less RPM than Monday's trip).So no, there is absolutely NO set factor on breakaway speed on taxi. As L. Adamson stated above, just put the throttle where it needs to be and dont even think about it. Just watch your speeds when you do get moving - THAT's more important than RPM. Our FBO absolutely hates seeing anything taxi faster than a brisk walk anywhere on the tarmac.Hope this helps -- just observation from a student who is still learning himself.

>>Lsst time was up in a Cessna 172, we needed 2,300rpm to>move>>the aircraft from its parking spot.>>>>Something very wrong with your C172 (underinflated tires?) or>perhaps terrain is not flat enough. I can start my (real) C172>moving with barely 1400-1500 RPM and will maintain forward>motion with 900-1100 rpm. Definitely the rolling friction in>FS9 (don't have FSX yet) doesn't correspond to my real-life>flight experince regardless if it is a Piper or a Cessna. The>sim1.dll works well for me in FS9 making ground movement more>believable.>>Michael J.>Try using 1500RPM to get of the grass at Elstree in the UK - at times I thought the engine may fly off the front of the aircraft ;-)Ray Keattch

Keep in mind that taxi speed power requirements vary quite a bit dependant on relative wind. Like a previous poster said, when I did my PPL training I'd often have to use anywhere from 1000-1800 rpm to get the plane moving, or keep it at a constant speed. The current load is of course a large factor too. Taxiing downwind towards your takeoff point, the wind is usually at your back, makes for an easy trip. Try going the other way, needs a bit more juice.For real fun with friction in the real world, try landing a plane on an utterly soaking wet grass runway (far too common thing here in BC) and then come to a stop for more than 2 seconds. Someone will likely have to get out and push. Full throttle won't be enough to free your wheels from their new depression homes, unless you have an F-15 or better. ;)One grass strip I landed one once, and wanted to do a backtrack takeoff on, required me to do doughnuts at 15 mph at the end of the strip, for about two minutes, until other traffic could get clear. Stopping would have guaranteed getting stuck. Talk about dizzy.Yeah I think FSX ground might be a touch too sticky, but it doesn't bother me. He's right, its a flight sim, not a taxi sim. :)A side bonus to the stickier ground is that planes don't weathervane in crosswinds at low speed nearly as badly as they used to in FS9, and *that* is a lot more realistic.

>For this reason I think some competition would be "healthy">:)There again, we could just enjoy how much better the aircraft feel in the air. It will then be possible to enjoy the sim until the next version is released.Ray Keattch