PITCH TRIM SYSTEM TENSION
..... While writing Section II of these plans, and building N81QA, we
built a simple system to vary the tension, or drag, on the pitch trim
wheel.
.....Make a third TS-1 bearing from phenolic. Drill a 3/8" diameter
hole as shown. Next, saw-cut the bearing through the hole, but do not
go all the way through and make. two pieces. The lower half of TS-1
is bonded with resin to the end TS-1 bearing already mounted. Do not
bond the top half or the system will not function.
.....Study the sketch. By turning the screw, the size of the 3/8"
hole can be varied slightly, changing the tension on the pitch trim
drum. A knob bonded to the screw would make tension adjustable in
flight.
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PAGE 20-3
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