I read in the MD-11 Swiss London-Zurich tutorial : "Half way between Gipol andTRA/10 extend the slats/flaps to 15" which works fine to get an autoland as described. But I am never sure at what point to start extending the slats/flaps when I do anotherflight. Is there a rule or procedure as to when to extend them ? Is it a question of speedor anything else. I cannot imagine that one does it just by guessing. I appreciate your explanations and help. Hubert Werni

When the airspeed decreases to the flap/slat extension speed, you will see an amber indication of what flaps should be extended on the speed tape on the PFD. For example, the speed tape indication will indicate F28 when it is safe to extend the flaps to 28.

Edited October 14, 201114 yr by Kenny

Whether you are on autoland or manual you extend or retract your flaps according to the flaps schedule. Which itself is dependant on weight.vololiberista

When the airspeed decreases to the flap/slat extension speed, you will see an amber indication of what flaps should be extended on the speed tape on the PFD. For example, the speed tape indication will indicate F28 when it is safe to extend the flaps to 28.

Thanks.I include a few screen shots and I wonder - if you have time - if could tell me whatthose amber/green indications on the speed tape mean and especially what action to be taken.Very much appreciated as I am somewhat confused. Hubert

Whether you are on autoland or manual you extend or retract your flaps according to the flaps schedule. Which itself is dependant on weight.vololiberista

Thank you.Can you have a look at my reply to Kenny and explain me what those indicationsmean and what actions to be taken.Much appreciated Hubert

GE/SE is the speed the gear/slats should be extended.F15/F28 are the speeds flaps 15/flaps 28 should be selected.FR/SR are the speeds that the flaps/slats should be retracted.The magenta circle is the target speed.

GE/SE in green is the max speed you could down/extent them. Autoland is same as manual. At 1500 ft the Autoland kicks in. Normally you will be then fully established for landing. John Btw. Dial a flap for landing is always set at 15. from there 28 and 35/50.

I always try to intercept the localiser with Flaps 15 and as soon as i´m on the glide flaps 28. when theres the 2500 Callout, Gear down and Flaps 35

I always try to intercept the localiser with Flaps 15 and as soon as i´m on the glide flaps 28. when theres the 2500 Callout, Gear down and Flaps 35

Thank you.Will do same on my future flights.

The MD-11 will auto extend flaps when the speed allows. If you are coming in hot, just set them to 35 and let them extend on their own.

These sections in the manuals may help: FMS.60.1, AUTO.30.16.

The MD-11 will auto extend flaps when the speed allows. If you are coming in hot, just set them to 35 and let them extend on their own.

This of course is NOT a good procedure and is not done like that on the real aircraft. If you need flaps to slow down then there's something wrong with your energy management.Regards,Markus

I let the FMC tell me when to deploy slats and flaps. Works normally very fine and allows me to concentrate on flying. I only select the FMS speed and the mangenta bug is shown. When the bug moves downwards to a lower speed and gets a circle you know that you have to ad a notch of flaps.

This of course is NOT a good procedure and is not done like that on the real aircraft. If you need flaps to slow down then there's something wrong with your energy management.Regards,Markus

You seem to know your stuff, therefore let me ask what is the good and correct procedure ?ThanksHubert

Hubert,When you fly an approach which you have programmed in the FMC previously either you are on autoflight or not the FMC will give you speeds, altitueds and directions which you should take care off. Shortly before final or at final the FMC will slow down from 250 knots to a lower speed. You will see this when the speedbug jumps down. You should slow down now. However when the speed bug can't jump further down because that will result in a stall the speed bug will duplicate itself. The dot which is mangenta all over will show you your speed which you should have at the moment. The sencond bug is only a circle. It will be in the orange/red area of the speed tape. The FMC wants you to decelarate to this speed but ther airplane can't because it would get in a stall. So you have to lower your slats and than flaps.As soon as the slats/flaps are in the supposed positon the red/orange mark of stall speed will disaper and move furhter down and the speedbug which was a circle before will now be a mengenta dot. You can do that your whole approach until you reach your landing flaps (35/50).This is often the best way to do that.Jonathan