Hi guys,
As mentioned before here, a big advantage of raising the ailerons instead of droping them in landing configuration on model aircraft is the neutralizing effect it has concerning
pitch trim ! This is particularly evident on airframes with swept wings !
Of course, the real, full sized ships never raise the ailerons in landing configuration ! Rather, and as mentioned before as well, they drop it together with the flaps !
BUT, and that`s the vital point here - all the big ones (at least the ones I have flown) have a HORIZONTAL STABILIZER TRIM ! So they can counteract the resulting pitch down moment that normally occurs upon flaps ( and possible aileron down movement ) with the pitch trim ( adjustment of the whole horizontal stab ) and ergo, they still have the whole range of that ELEVATOR deflection at hand to control the approach angle and of course the landing flare !
Now, almost none of our model ships have such a horizontal stab pitch trim and therefore have to rely on the elevators alone !
Trimming out the plane in landing configuration ( especially with the ailerons dropped together with the flaps ) with the elevators alone might leave you with too little elevator up authority in difficult approach and landing conditions !
That is THE reason why I fly my jets with some crow in landing configuration !
And, believe me here, coming from the full size world, it took quite some time for me to accept that raising ailerons in landing configuration can be an advatage in the model world !!

see you
Hans