wsmalley,

Unfortunately, I couldn't find a picture anywhere on the web that showed the trimmers, but I did find a little write-up that describes the Skyray. It did indeed have conventional slats on the leading edge and trimmers on the trailing edge. The best way I can describe these, if you haven't seen them, is that they look a lot like pieces of leading edge stock that extend forward and down, leaving a fairly clean leading edge behind them, and a nice channel between the slat and the wing when extended. The air that blows out of this channel onto the top surface of the wing is important to delay stall. The trimmers are small supplemental elevators used, as you mentioned, for takeoff. It seems that the reason for them is to keep the nose up without having to deflect the elevons. This was desirable because the elevons were most effective when they were near neutral, so they didn't want to use them to keep the nose up at takeoff and lose roll authority. If you wanted to implement both trimmers and slats, I am not sure whether you would want to control them separately or mix them. The article only mentioned using the trimmers during takeoff, while you might want to use your slats for takeoff and landing. If you have a computer radio, you could put them on separate servos and decide later. It would be great to see pictures when you get that far.

banktoturn