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rrritchey's blog View Details
Archive for December, 2012
Posted by rrritchey | 12-10-2012 @ 05:22 PM | 22,282 Views
Hi,
I seem to run into this problem over and over and over. For some reason people are just not setting up their planes correctly mechanically before they start doing electronic adjustment.

First, you should make sure all your transmitter servo trims are at zero. Then, check all your servo arms and make sure they are as perpendicular to the servo as possible. Sometimes rotating the arm 180 degrees offsets you by a 1/2 spline so you are closer to perpendicular. Then you should program the throw in your radio on all your flight surfaces (ailerons, elevators, rudders, flaps if you got them and what ever else moves the air) so that the high-rate throw in the transmitter is the maximum minus a little bit. So if your radio will allow you to set your travel to 150 then you should back that off to 140 but program that into all your flight surfaces. The 10 points is to allow some room for the electronic adjustment outside the radio. You should do this if you are using any external adjustment device, Equalizer, MatchBox, MSA-10 or anything else that does what these do.

Next you want to make sure your radio is set for your high rates. You can use your radio subtrim (offset) to get your servo arm perpendicular to the servo pushrod. This is very important. If you have ganged servos then you want to make sure the primary servo has this done. The others can be done using the electronic subtrim adjustment of the external adjustment device. You want to keep your plus and minus throws equal in the transmitter. Then MECHANICALLY you want to get all your surfaces VERY CLOSE to where you want the final throw to be for high rates. This is for all surfaces. If you mechanics are not setup well you are going to run into problems down the road. At neutral you want all ganged servos to have their pushrods perpendicular to the servo arm.

Last you you want to go in and use the external device to do fine adjustments to get the surfaces final positions. Set up the primary servo first, get the endpoints where you want them. Move to the next servo. Get the servo arm perpendicular to the pushrod at neutral. If you have to adjust the length of the pushrod at this point so that it does not fight the primary servo at neutral. Then move to the endpoints and adjust them so they do not bind. Then move on to any other ganged servos.

Doing things this way will make everything perform better.