Bruce....The biggest thing that differentiates models with full scale is airspeed.......The spoiler panels on lets say a B-757 consist of six panels on each side.....4 on each side are capable of flt/grnd spoilers and 2 on each side are grnd only......grnd spoilers are to reduce the lift of the wing to enable much more effective braking, especially on wet runways.....now the flight spoilers at higher airspeeds might come up 2 or 3 inches(10deg) from faired( during a turn).....above 250k indicated.airspeed.. with a maximum travel of 35-40 deg which you wouldn't see under "normal flying".....for higher sinkrates out of altitude you might see 25 deg or so for all 8 panels.....which still function in turns(one side panels less deflection with opp side more deflection)....like it has been mentioned the spoiler panels are above and slightly fwd of T/E flaps...which is roughly @ 70% of wing chord....the proverse/adverse yaw is negligable........I think you could make a nice combo of aileron/spoilers very effective with some experimentation ..... keeping in mind the slower flying speeds models have....Bill...