JerryH

It would help to know the specific aircraft and/or whether your problem is with a jet or a turboprop aircraft. The only PID settings I'm aware of are the ones in the autopilot section that control tracking of the NAV and Glideslope. As far as I know, the only autothrottle variables are autothrottle_max_rpm and max_throttle_rate. If there are others, they probably are not accessable by the user. Regards, JerryH

I haven't noticed any downside to lowering max_throttle_rate when applied to turboprops. But, you can't hurt anything by trying it. Just backup your original aircraft.cfg file (including the original value for fuel flow gain), then hack away at the max throttle rate and see what happens. Is it true that you're concerned about jets rather than turboprops? Regards, JerryH

I don't recall having this problem with any of the jets, but it almost always occurs when I add the autothrottle to a turboprop aircraft. I don't know how many "real" turboprops have A/T, but mine seem to like it just fine. The solution that works for me is to edit the aircraft.cfg file. Go to the [autopilot] section and locate max_throttle_rate. This value is always set to 0.10 by default. Start by cutting this value in half to 0.05 or less. Then set up a flight test and experiment until you're satisfied with the result. Each time you change the value, exit the sim, edit the .cfg file then restart the sim. Let us know if this helps. Regards, JerryH

Brian, I'm using that panel with the B737-200. As far as I know, it's a Greg panel because the filename is greg7372.zip. It may be available here, but I found it at FlightSim. Regards, JerryH

Thanks for providing all the details. Before reading through your comments, I thought it could be a problem with a sloppy autothrottle and variable airspeed that caused the altitude changes. But you said the throttle is set manually. My guess at the moment has to do with pitch control or stability that can be tweaked in the aircraft.cfg file under the [flight_tuning] section. I would try one or all of the following parameters: - pitch_stability - elevator_effectiveness - elevator_trim_effectiveness The default value is 1.0 for all of those. My technique would be to change each value individually and run a test flight. Double the original value for starters to see if it makes a difference. If so, you can fine tune it later. If pitch_stabilty changes don't help, for example, set it back to the original value and try the next item. Be sure to back up the aircraft.cfg (or take good notes) before you mess with this. The problem could be caused by one or all or none of the above. Good luck. Regards, JerryH

Martin, it's impossible to help you without more info. Please give us the specifics of the aircraft model, plus the altitude, airspeed and weight during this problem. Are you using AP and/or autothrottle? Add anything more that you can think of. Otherwise, all you will get are more responses like this one. Regards, JerryH

To add to John's list, this website has lists of ATC airlines, types and models: http://www.homepages.mcb.net/bones/Flight_Sim/download/downloads.htm This may not cover everything, but should include the codes that exist in the FS9 voicepack. This includes code "L101" that will get ATC to say "L-1011". The last time I looked there were some omissions that can corrected with the EditVoicePack software. Regards, JerryH

Martin, If you're talking about the Milton Shupe Dash-7, you can expect the performance numbers to be correct. The "Performance=" section of the aircraft.cfg contains specs for the aircraft. These can be edited, but will have no effect on the simulation. Most of the values in the [Reference Speeds] section are supposed to be KTAS, not KIAS. The exception is the value for Max Indicated. At any altitude above sea level, your True Airspeed will be higher than your Indicated Airspeed. While cruising at 180 KIAS, your True Airspeed could be as much as 220 KTAS or higher depending on the cruise altitude. Also, max cruise speed will usually increase at lighter weights. Regards, JerryH

If I understand correctly, the easiest way to fix the problem is to go to Settings and click on Traffic. The Traffic page has a section of options for Aircraft Labels. Put a check mark in "Show Aircraft Labels" and check the options you want. Choices include Manufacturer, Model, Tail number, Distance and Altitude. I believe there may be more options if you want to edit the FS9.cfg file. Give it a try and let us know if it helped. Regards, JerryH

The only thing I can think of is the B727's weight is too high for an approach at 132 KIAS. That could cause you to stall at some point. This could also be the cause of the up and down pitching during turns on your approach. Turning requires more lift to maintain altitude and you may be near the lift limit (stall point) of the wings.If my overweight "guess" is correct, try the same flight after removing three-fourths of the fuel. Otherwise, I'm stumped.As far as editing the .air file is concerned, that's usually not necessary. In most cases, the aircraft.cfg file can be edited to accomplish the same thing. Many entries in the aircraft.cfg simply override the same thing in the .air file.Good luck, Robert. Let us know how it goes.Regards,JerryH

Sorry, but I missed a "key" point in the post above. The command to change views cannot be set within the FS9 Key Assignments. It must be added to the FS9.cfg file under the [Keyboard_Main] list. Mine is set up as:see_own_ac_toggle=86,9You may want to be sure that Shift-V isn't being used for something else before you add this to the FS9.cfg file.Regards,JerryH

If I remember correctly, you can do the same thing by pressing Shift-V. There are some side views that I like and others that look rather cluttered to me. Shift-V allows me to change views while FS9 is running.Regards,JerryH

My reference speeds are identical to yours for both versions of the B727. I'm totally out of ideas at the moment. When I get the time later today, I'll fly the bird and test it at higher speeds to see if I can make it shake.Please let us know if you ever figure it out.Regards,JerryH

I have the B721 and B722 from Vistaliner. In the aircraft.cfg files for both of them, under [Reference Speeds], are two speed limit values. I believe these are the ones that determine the overspeed setting. Check yours to see if they agree.max_indicated_speed=341max_mach=0.82Your speed of 220 KIAS is also near or over the limit for takeoff flaps, but I don't remember if that affects the flight model. Of course, I'm sure your flaps are up well before 10,000 feet, but just thought I would mention it.Regards,JerryH

Glad you got it sorted, Jont, and Cheers to you.JerryH