I am flying a 40 size pattern plane, and I have begun to experiment with spoilers. Each of the aileron servos bringing the ailerons up. I have increased the up throws several times, only to notice a definate tendency to pitch the nose up, although I have zero elevator mixed in. What is the explanation for this up pitch? I had thought that spoilers simply destroyed lift, and the plane would simply sink faster as I slow it down with reduced throttle and some evevator management. I wonder if spoilers are preferable to flaps in landing? I'd appreciate help in trying to understand what is happening. Thanks