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P a g e
Edge 540/2.6m
If you need to move the rudder tray forward to obtain the correct C
of G, you will need to make 2 new mounting formers to use on the
existing tray. Use 3mm ply for this.
Use some card to make the shapes for the new formers. You can
use the supplied former to aid with the basic shape. The basic
shape of the standard former is pretty close but need to be
stretched a little. A scroll saw makes the job of cutting out the ply
very simple.
When selecting the new position for the tray, keep in mind the
location of the canisters, you do not want to subject the servos to
too much direct heat from the exhaust. Also keep in mind the
landing gear plate. If you ever break it and need to remove it,
having both the landing gear plate and rudder tray too close can
hamper the operation. Some separation is desirable, around 40-
50mm is ample.
When you are satisfied with the servo tray location, use some CA
and kicker in a few spots to hold the tray in position while you apply
epoxy and while the epoxy cures.
After the epoxy has fully cured, place your servo(s) back into the
tray, and screw into position. Fit your chosen servo arms and
linkages, and rout the servo leads to you desired position.
Everything is now ready for the pull/pull cables to be measured up
and fitted. As mentioned before we used straight cables rather than
crossed. Crossing the cables will move the cable exit slots in the
fuselage rearward and the cables will foul on the rear fuselage
former.
Pull/Pull Cables:
This is one area where the term “Measure twice, cut once” really
comes into play. While the job of fitting the pull/pull cables is not
difficult, being sure of your measurements is important. While we
have supplied measurements for the cable slots, you should still
make your own measurements to verify that the positioning is
correct. Small changes to the assembly process and changes of
equipment can alter the outcome, so “Measure twice, cut once”!!
The first line we need to establish is the horizontal line, essentially
the plane the pull/pull cable will lay on. This process is quite simple
and will only require a few measurements. The process is the same
regardless of whether the rudder tray is in the rear or forward
position.
You need to establish where the pull/pull cable meets the servo
arm. Use a straight edge on the canopy seat, measure to the top of
the servo arm. If you are using alloy arms, measure to the centre of
the ball link, this will be a few millimetres higher. Now that you have
a measurement, you need to transfer that to the outside of the
fuselage.