Roll control mechanisation, CJR50
I was sat for 90 minutes last week on a CRJ50, and being who I am, and having run out of reading material, I found myself watching the wings.
The aircraft has ailerons covering roughly the outboard 1/3 semi-span, and then two spoilers at 2/3 chord(ish) one within the inboard 1/3 semi-span, and one roughly in the middle.
The aircraft as it rolled was sometimes using aileron, and sometimes using the inboard spoiler - but I couldn't for the life of me work out which and when; it may have had something to do with airspeed, but didn't seem to have much to do with gear or flap settings.
So, purely for my interest and edification, can anybody explain what decides when the CRJ uses aileron, or spoiler, or both?
G