Vernon,We still fumble in the dark as to whether your figures are correct or not. You have to give us some relevant data to work with. What did you enter in the speed window? What was your gross weight? What outside air temperature and airport altitude did you have at the time? Any derate or SEL TEMP N1?Here's what my 800/900 manual says in chapter 07, page 7-16:http://forums.avsim.net/user_files/97727.jpgI would aldo suggest you read up on chapter 09, "AUTOMATIC FLIGHT MANAGEMENT SYSTEM".And Vernon, you'd better start to learn the lingo! :+ ;-)Hope it helps,

While entering required data into the FMC, the final page during the process (take-off ref) will tell you the recommended trim setting (typically about 5.5 in my case with the 700). The TRIM value is shown in the center of the CDU screen right above the 'preflight complete' line. I would expect the exact trim value will vary with the CG (based on fuel/pass/etc.) and other FMC entered parameters (weight, temp, thrust derate?). This recommended value can then be set using the KPD1/7 keys and observing the Throttle quadrant trim scale/needle. I have found that setting the suggested value results in a nice hands-off climb rate at approx V2+20 once gear is retracted. Hope this helps.

Thanks everyone..!!This is a most friendly and helpfull BB, and I appreciate the input.As it turns out I had the 737 aircraft unevenly loaded, and when I reavaluated the trim situation the pointer was outside the green area on the pedestal. Just one more feature of a very sophisticated aircraft, and another reason we enjoy flying it... I made a subsequent flight with no further problems, soI going to resume myjourney... Vernon Brown

I may be wrong, but the stall speed is generally referred to as the 'Alpha' speed, or reaching Alpha conditions (meaning close to stalling) ... so if i had to guess why they chose 'A' it would be that.

Vernon Another possible reason is this:Because you are not following a published standard operating procedure ie TOGA/A/THR all the way or not at all you are probably being caught out by the THR HLD mode build into the TOGA system.Here's the explanation:When you do a normal TOGA / A/THR take-off the sysem first applies TOGA or R-TO thrust. passing 84kt the a/THR system enters THR HLD mode which effectively removes electrical power from the A/THR servos ensuring that a computer glitch won't cause the throttles to retard during takeoff. If you are doing what you say you are doing then you are engaging TOGA past 84kt then closing the thrust levers. If the A/THR goes to THR HOLD then the thrust levers are still controlled by you unless you hit another speed mode on the MCP. The result is the power comes back and you quickly reach the stall. As an adendum and vain attempt to prevent being flamed by those that then say 'but the thrust levers come up from idle' yes they do. The A/THR system has a basic Alpha floor protection system and will endeavour to recover the speed when you get the little 'A' appearing (at least it does on the real thing not sure about PMDG). Glad you found part of the problem to be the trim but I would suspect you should also get the take-off config warning if the trim was out of the green band and power was applied. Finally I would recommend that you review the TOGA take off procedures and follow them or manually set the power and try not to mix the 2. A wise man recently told me that Boeing write these procedures for a reason ie they know their aircraft better than most as they tested it and so only a fool would attempt to make up their own procedure. Yes this is a sim but if you want realism why not do things by the book.All the best and happy flyingKris

I think the 'A' means that you have to be at a speed greater than what is being currently shown on the SPD MCP....I don't think it means 'Alpha' speed protection because I don't think the 737NG has Alpha speed protection. Is this a correct statement??Regards,jack

Jack - The NG sure has an underspeed protection. Just as previous posters have explained. That's why you should unselect any speed mode on a manual approach but not turn A/T off. As long A/T is ON it will protect from underspeed regardless if a speed mode is active or not.Hope it helps,

Mats,Many thanks for the 'heads-up' on the speedo..Regards,jack