I use the 80kts call out as a reminder to remove my thumb from the auto-throttle disconnect switch. Below 80kts, you will need to disengage the AT in an aborted TO, otherwise you will be fighting it and it will set TO thrust again as soon as you let go of them. Above 80, the AT mode is "HOLD", so pulling the thrust to idle will leave it there.Anyways, this is how it works on the 747-400.

The basic 80kt callout which has existed for many years was designed with two functions in mind.1. Cross check both the Captain's and PO's AIS One calls "80kts!" the other "Check!"2. For the Captain (if he has elected to "fly" the aeroplane to announce "I have control".The usuall routine is for the Captain to always control the a/c on the ground. If he is also flying it then during the take-off run he will be steering the a/c with the tiller while to PO will be holding the control column. Then at 80kts the PIC takes control steering with the rudder and using the control column to rotate etc etc.vololiberista

Does it have something to do with the rudder taking affect at this speed (to steer down centreline)?

Could if you have your SOPs built the way that regardless of who is PF, CPT will have his hand of rudder to correct the direction. But since rudder gives you 7° of nosewheel deflection from both sides, I guess that is irrelevant an CPT can give control after lineup.

Don't worry guys, FS2Crew will have all this and more. The Voice version will keep you out of bed for hours. :( :(

Don't worry guys, FS2Crew will have all this and more. The Voice version will keep you out of bed for hours. :( :(

No can do. That would mean NO sleep for me, as I get little enough already. With NGX box on the way... well good thing there is a winter break.

Hi,in real life apart all the consideration given above the "80 kts" call (or "100 kts" depending on companies-SOP) is important also for others two reasons:1) To compare airspeed indications (i.e. if my side tape speed is 80 and that of my FO fellow is 100 takeoff must be aborted 'cause you couldn't say which of two airspeed indicators is right and which is failed;2) To be sure the PF is living during takeoff roll: if PNF call-out "80 knots" and the PF can't respond "checked" it'd be supposed he would have an heart attack (or something similar) and the PNF must abort the takeoff (companies SOP)Best RegardsAndrea Buono