I am wondering if I have something wrong.In the King Air with throttle at 1%, prop at minimum, and low idle on the mixture, I get a steady taxi acceleration up from 7 up to around 30 rather quickly once I take off the parking brake Does that seem correct? I can't slow the taxi down except by hitting the brake or moving the throttle into reverse.Thanks,Myles

Yes, that is right. The real aircraft does the same thing.Allcott

Ahh, the neverending King Air taxi questions. MSFS is quite accurate in its model of the King Air groung handling characteristics, and if you are not familiar with the operating procedures, it seems like a handful because the airplane really wants to move quick (and yes, the real ones are the same). As a mechanic on a fleet of King Air 200s and 350s I have spent a lot of time taxiing thes aircraft, and I will never forget the first time as the airplane wanted to GO!!First off, keep the prop levers in the full forward position. While the engines are at idle, the prop levers have NO effect whatsoever, as the engine is not turning fast enough for the propeller to be within its governing range. This means the prop levers have zero effect on the props, unless they are put into the full feather position (which will stop the aircraft from producing any forward thrust). You are correct in having the fuel condition levers in the low idle detent, putting them in high idle for taxiing is not done as it adds 10% N1, burns more fuel, and makes the airplane REALLY move quickly. Now for the throttles, and keep in mind this is not only for the King Air, but all turboprops that use full feathering constant speed props. These are the only levers used while taxiing, and they are used a lot (much like the gas pedal in your car while in traffic). First an explanation of alpha range and beta range.Alpha is any setting that allows for a positive prop blade angle of attack and thus, forward thrust. Beta range is flat pitch all the way back to reverse thrust (negative prop blade angle of attack). Keep in mind that as you first enter beta range, the props will have a slight positive AOA as they transition, but a lower angle than is desireable for flight operations, so it is considered beta. This is the setting that King Airs are normally taxied at. It allows for a lower forward thrust than what is available in alpha range and makes it easier to control forward speed without having to ride the brakes. But, keep in mind, as I said earlier, it is not unlike the gas pedal in your car, there are constant adjustments to be made. If you kept the levers in the forward part of beta range, you would be taxiing too slow, but in the aft side of alpha range you would be moving faster than desired. Taxiing the King Air is a constant balance of alpha and beta ranges. More speed, nudge the levers into alpha range momentarily, then back into beta. Need to slow down, pull the levers a little further into beta momentarily, then forward again (but not out of beta range).How MSFS simulate this you ask? Unless you have a throttle quadrant for your PC, not very well. Prop levers forward, condition levers in low idle, then a constant balance of throlle movements, and TAPPING F2 to get into that forward end of beta range. Remember....more speed, nudge throttle forward, less speed, tap F2. Hope this helps!! :D

Thanks to both of you for the explanation.I made some modifications to my Yoke setup now.I have a CH Yoke and have programmed the toggle belowthe throttle lever to be F2. Thus I can move the throttlelever to idle ( netting 1% thrust ) and use the toggle to go into the beta range.Not sure if there is a way to calibrate the throttle leverto have both alpha and beta ranges?Thanks again,Myles

>Not sure if there is a way to calibrate the throttle lever>to have both alpha and beta ranges?I am afraid it is very difficult to do for the default King Air implementation.If on the other hand you take something like Flight1's Meridian then yes, thanks to Steve Small's careful work you can have both alfa and beta ranges on your throttle provided it is very well calibrated (must be able to achieve perfect ZERO). And then you don't need F2.Michael J.http://www.reality-xp.com/community/nr/rsc/rxp-higher.jpg

You can use of fully registered 3.x version of FSUIPC for FS2K4 to calibrate the minimum, idle, and max positions of the throttle axis AFTER you calibrate your throttle in WIN. Also, if you elect the FSUIPC option to map as single throttle control to multiple engines, this bias will be automaticly applied. On a yoke lever, the idle position might be too difficult to mark. If you have a seperate throttle lever this might offer more options such as possible attaching a mechanical barrier such as a flop hinge at the idle point that you can flip to go below idle to get into beta range including reverse thrust.The new CH Pro Quad Throttle is going to be provided, hopefully, with some kind of detent or gate as discussed on another thread on this forum including a note from the project manager.