Sunday, October 14, 2007
Tru Trak roll servo.
I installed the Tru Trak role servo today. The servo is a beautifully made stepper motor. It is a bit on the heavy side but much more reassuring than the Navaid devices servo which I believe has been carried over to Trio. The kit comes together with the necessary mounting hardware, though I did have to trim about 3/16" off the bottom of the vertical bracket.
All the nuts, bolts and bearings are supplied, together with an already tapped push rod. I did have to make up a shim since the upper part of the bracket is resting on the angle that makes up the longeron, and the rest is resting against the vertical web. The motor clears the belly skin by about 1/8".
It is a bit of a tight fit, but once it is in it appears to just clear everything. The large washer outside the bearing arm on the servo comes within about 1/16" of the underside of the floor, but I guess that is enough.
The total movement of the arm is a little less than 2", which is very little but appears to be what Tru Trak expect.
There is a very slight drag from the stepper motor when you move the stick, though once the push rods an ailerons are connected I suspect this can not be detected.
