Model Aero Polaris EX Manual page 9

9
Push rod assembly
Inset photo shows the push rod assembly. The shrink tube slides over the rigid tube and wire. Then
the shrink tube is heated to form a near watertight push rod assembly. A little Vaseline where the
wire exits the shrink tube will increase the water resistance. Use the photos as a guide to locate the
push rod exit holes. Note the plywood support for the elevator push rod.
Note that there will be some flex in the rudder push rod. It is designed this way as protection for the
servo since the rudder will be in contact with the ground. Some pilots may prefer a more rigid setup.
In this case, a stronger metal gear servo should be used.
Also, it's a good idea to apply some type of protection on the bottom of the fuselage. We prefer
thin plastic such as used for school folders. These two page folders can be found in various colors
and only cost around $1.00. Another option is duct tape (Scotch Tough Transparent Duct Tape is
particularly good for this purpose).