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Guest fjshepherd

Speedtape problem

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Francis,Why are you using V/S in this phase of flight ?. You are asking your plane to climb at 2300 fpm with a speed of 215 kts (that is a very low speed for a clean configuration when you are loaded with almost 100 tons of fuel)You are only getting 170 kts because you are asking for "too much" (Look at the pitch indicator: 18

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I will explain myself better:The point with V/S is that it has not "speed protection".After the initial climb-out, when you reach the flaps retraction altitude (let's say 1500 ft), you want your plane to accelerate to the clean configuration speed. The way to get that acceleration is lowering the nose, BUT, if you are in V/S mode your plane WILL NOT lower the nose, it will continue trying to achieve the selected vertical speed (it will maintain an excessive pitch-up attitude) resulting in a stall most of the times.FLCH and VNAV, however, DO HAVE speed protection capability.Jose Luis.

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OK, firstly, that shot is for illustration of the problem only and has nothing to do with it. Let me go over the problem again. I config properly, set flaps and trim, and as soon as I become airborne, the speed all goes to red, with no audible warning. I rotate normally.

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Francis-you still need to post an image of the problem *WHEN* it occurs. That way, we can explain to you what you're doing wrong (or you will have found a bug that we can trace and fix).

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I will. Prepare for more screenshots...

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http://i147.photobucket.com/albums/r313/fjshepherd/pmdg1.jpghttp://i147.photobucket.com/albums/r313/fjshepherd/pmdg2.jpghttp://i147.photobucket.com/albums/r313/fjshepherd/pmdg3.jpghttp://i147.photobucket.com/albums/r313/fjshepherd/pmdg4.jpgNormal takeoff, speeds and weights all calculated, RTO Brakes set, Packs on, APU off, all the usual stuff, trim set, using the TO/GA button (screw) with a 5% derate, Flaps 20 etc etc etc... No Tailstrike

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Why 20 degree flaps? Try 10 degree's.Flap relief problem?I use 10 degree flaps and have never had the red tape like yours.

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I have tried it with flaps 10, makes no difference.

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I think the problem is the FLCHG mode... the normal climbout procedure is to use VNAV. If you're not going to use VNAV then I believe you cannot use the autopilot for pitch control until after the flap retraction sequence and you're established in a safe climb; at which point you could use FLCHG until the transition altitude. If you don't want to use VNAV then I think you need to use the MCP only for thrust management (TOGA/THR) and LNAV or HDG.

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I believe you can use FLCHG SPD mode for departure and engage the autopilot although I'm not sure you'd want to.Paul

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>Normal takeoff, speeds and weights all calculated, RTO Brakes>set, Packs on, APU off, all the usual stuff, trim set, using>the TO/GA button (screw) with a 5% derate, Flaps 20 etc etc>etc... No TailstrikePerhaps it's because you have 250kts set in the MCP, rather than the V2 speed from the FMC. The AC can't obtain 250kts at it's current config. I believe (and please correct me), that's this is similar to the 737 putting a flashing "A" in the MCP speed window when the speed is set higher than can be achieved.Not sure, but this is my theory.- John

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Hard to imagine how FLCH could be a TO mode. It shouldn't even arm on the ground, at least it wont' on the airplane next door. Check the overhead. I think one of those darn mechanics left one of the air/ground breakers out. Wasn't this the airplane that's been having tilt problems. Bet they were working on that.

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Ignore FLCH mode, that doesn't seem to make the difference. I only puot it on because I didn't set the FMC route. I will try another takeoff tonight. Bear in mind these red bars continue throughout the flight in all phases.

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Delete and reinstall the airplane. Sure wish we could do that in real life. Actually, come to think of it, sometimes we do. "Sorry to report, but ya'll gotta go get another airplane, chief. This one's too broke." Great sport to watch ops go crazy! Hey, do we get breakers on the new 744? Bummer about the radar.

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I'd personally like the opinion of the PMDG team before I go reinstall it.

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Is FLCH active when you load the aircraft? I remember this used to be a problem and could cause other undesireable results.

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No, I engaged it and as previously mentioned it HAS NOTHING TO DO WITH THE PROBLEM! I have tried with it off.

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Do you get the red bars on the speedtape during a normal VNAV-controlled departure?

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Francis,This is a really weird suggestion, but either go to your EICAS STAT page or go to an outside view and see if any control surface is sticking up in the wind. After I installed the sound update for my 747 Queen of the Skies, I actually had one of the left aileron slats sticking up when I loaded the aircraft. I couldn't get it to go down either. It was only a single, small slat, so I don't know if I would have noticed it in flight. I didn't try to take off in that condition.I had to reinstall the aircraft to get rid of the problem, sans the sound update this time.Kim

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Yeah, I do my flight control checks both inside and outside, et je n'ai pas le sound update... Thanks for the suggestion...

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Francis,Go to your FS9/PMDG folder - open up the 747400gauges.ini file and make sure the PFD section has the following in it:VLE=270.0FlapPositions=7 // 0, 1, 5, 10, 20, 25, 30// Default ValuesVMaxFlaps=365.0, 280.0, 260.0, 240.0, 230.0, 205.0, 180.0Mmo=921This can cause those red bricks if the settings get changed.

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Did your aicraft actual weight equal the weight you put in the FMC? How did you set your actual aircraft weight?Cheers.Q> P.S. (sidenote) No, FLCH is not a valid takeoff mode. It's selectable on the ground (on our real aircraft), but the pitch bar will drop BELOW the horizon, until you build up enough speed to get the aircraft to the selected MCP speed. As you have selected a very abnormal V2 speed of 250kts, it might take some time for the FD bars to move :(

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>Francis,>>Go to your FS9/PMDG folder - open up the 747400gauges.ini file>and make sure the PFD section has the following in it:>>VLE=270.0>FlapPositions=7 // 0, 1, 5, 10, 20, 25, 30>// Default Values>VMaxFlaps=365.0, 280.0, 260.0, 240.0, 230.0, 205.0, 180.0>Mmo=921>>This can cause those red bricks if the settings get changed.Here is what my 747400gauges.ini looks like[FMC]LastPos=N51

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>Francis,>>Go to your FS9/PMDG folder - open up the 747400gauges.ini file>and make sure the PFD section has the following in it:>>VLE=270.0>FlapPositions=7 // 0, 1, 5, 10, 20, 25, 30>// Default Values>VMaxFlaps=365.0, 280.0, 260.0, 240.0, 230.0, 205.0, 180.0>Mmo=921>>This can cause those red bricks if the settings get changed.Now added that to the PFD section, will load up and try again...

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