I have installed the spoilers successfully on my Chrysalis 2 Electric. With some end point adjusting I have them opening and closing with no strain on the servos.

The only problem I have is that the right spoiler opens up to 65 degrees from the closed position and the left spoiler opens 55 degrees from the closed position. This is due to the fact that the threads on the 2 different servos don't line up the servo arms exactly the same. When I try to adjust one to match the other it is always different than the other servo arm position. Is 10 degrees difference anything I should try to correct and if so can you suggest a way to accomplish this.

From : Don Stackhouse

That's not likely to cause a loss-of-control, but it will probably cause some rolling effect. You will need to add some rudder to keep the plane level with the spoilers out.

You should be able to adjust this discrepancy out. However, you may need to change servo arms.

Ever notice that the spline on the servo output shaft typically has an odd number of teeth, such as 29? That's so you can fine-tune the mechanical neutral position. For example, if you put a 4-arm output arm assembly on the shaft, you will find that the neutral position you get changes if you pull the output arms off and turn them to the next arm when you put them back on.

Remove the retaining screw from the servo output shafts and slip the arms off. Slip on a 2 or 4-arm output arm assembly, and try each of the different arms till you find the ones that give you the same position on both servos. 2-arm assemblies will usually work as well, you just have only 2 possibilities instead of 4.

One other thing to watch, on some 4-arm assemblies, the holes on two diametrically opposite arms are at one radius from the center, and the other two are at a different radius. Make sure the arms you end up using on the two spoiler servos are the same length.

Once you've found an arm for each servo that results in both spoiler servos having the same length and angle, you can clip off the other arms so they won't interfere with anything. Reinstall the pushrods, set your transmitter's spoiler channel for max travel, then adjust the bend in each little spoiler pushrod (that's why we supply soft stainless steel wire to make them from, although soft .032" diameter paper clip wire will also work) so that each spoiler is exactly closed when the servos are in the closed position. Yes, you can use the sub-trims on your transmitter, but that may cost you some spoiler travel, and in any case it shouldn't be necessary.

Next, open the spoilers and double-check that they are getting similar opening angles. They should be much closer than what you're getting now. Once you have everything adjusted correctly, reinstall the servo arm retaining screws in the output shafts of the servos. If you removed the covering from the rectangular spaces under the servos to get better access, you can iron on a patch over those areas now.

Don Stackhouse
DJ Aerotech