Quickie Q2 Lite Construction Manual - page 241

Q2 Plans - Chapter 14 - Page 14-10

INSTALLING THE PITCH TRIM SYSTEM 

.....

 The pitch trim system is a simple looking double spring system 

mounted in the center console forward of the control stick. It must 

be built exactly as per plans if you are to enjoy the same fine 

handling qualities as the prototype Q2. In addition to providing 

pitch trim capabilities, the system also serves to regulate the stick 

force per g of the control system in pitch. 

.....

The illustrations are straightforward. The trim wheel is carved 

from plywood, and a dowel is bonded to it to allow the AN3-11A bolt 

to attach the trim wheel to the 0.375" O.D. x 0.049" wall 4130 Steel 

Tubing. A AN931-6-10 grommet is bonded to one of the TRl phenolic 

bearings (both of which are bonded to the vertical side pieces of the 

center console) in order to provide friction in the system. This is 

very important. Be sure to verify clearance between the pitch trim 

system and the CS13 rod and control stick. 

.....

A hole is drilled-through the tubing to allow the 1/8" diameter 

nylon rope to be knotted twice for retention. Be careful to avoid 

kinks, and pre-wind the rope at least one turn around the tubing to 

avoid jerkiness in the pitch authority. Note that the #1 and #2 

spring ropes wind in opposite directions on the tubing so that 

rolling the trim wheel forward yields a nose down trim direction. 

.....

The rope should be replaced every 1 year/100 hours. See the 

"Initial Flight Testing of Your Q2" guide for information on altering 

trim rates and forces.