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Rudder pull-pull setup:
There are a wide variety of pull-pull systems on the market to choose from. Since we have already provided
you with the hardware for the horns, you will just need some cable, crimps, and 4/40 connectors to complete
this installation. We used 150lb test down rigger cable. We prefer the non-plastic coated cables provided by
some manufacturers. Again the choice is yours. You can buy this inexpensive cable and crimps at most
sporting goods stores or boat shops.
Install your pull-pull cable. Ensure the distance of the cable is equal on both
sides. Also, the distance between the two horns on the rudder should be the
same distance as it is on the servo arm. For example, we use a 3-inch arm
with each cable placed at 1.5 inches on each side. Rotate the horns in until
the cable is at the same distance on the rudder i.e. 1.5 inches on each side
from the hinge line. It is normal for the non-pulling side of the cable to
slacken a little when the rudder is deflected.
Once completed, check the clearance of the rudder horn with the elevators by deflecting them by hand to
45 degrees. If there is any contact you can cut off the remaining ends of the threaded rod on the rudder
horn assembly to attain proper clearance.
Assemble the fuel tank according to the
directions provided on the package. You will
need to decide whether you want a two or three-
line setup. With a two-line setup you will need
an additional “T” fitting in the carburetor line
that connects to your fuel dot or fueling device.
Make sure you use Tygon fuel tubing inside the
tank for the clunk as well.
Install the fuel tank just in front of the wing tube
using zip-ties or hook and latch (Velcro) straps.
Place a loop in the vent line over the top of the
tank to prevent fuel loss during flight and
improve flight times. Take small zip-ties or fuel
line clamps and fasten to all the points where
the fuels lines connect.
Lets install the wings at this time and check our center of gravity (CG). Install the carbon fiber wing
tube. Slide in each wing panel and secure them with the two nylon wing retention bolts.
Tip#8 If the wing is tight you can coat the tube with a little baby powder to aid the insertion of the wing
panels.
Tip#9 For added protection in case the wing retention bolts back out during flight; you can add hitch pins to
the anti-rotation pins of the wing. With the wings installed, mark the anti-rotation pins ¼ inch from the
fuselage side. Remove the wings and drill a small hole in the anti-rotation pins. You can find appropriate
sized hitch pins at most local hardware stores. Re-install wings and insert the hitch pins for added
protection.
Now we’re ready to check the CG and install your remaining hardware. The CG range is 5 to 6 inches back as
measured where the wing meets the fuselage. We recommend 5 to 6 inches for initial flights.
