Installing the Flight Pack
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Installing Onboard Gear

We have learned that installing the onboard radio as early as possible not only speeds up the installation but makes the installation simpler with better pushrod alignment.

  • It is possibly a better solution to use rails as opposed to plywood trays. Trays require support rails anyway and tend to be heavier.
  • If you use the right wood type for the rails, they should be strong enough without adding much weight to the plane. It is important the the rails are strong as you don't want the servo's to have any flex, which would introduce play.
  • You should pre-mount the servos on the rails.
  • The only part of the servo that should touch any part of the structure are the grommets. If any other portion of the servo contacts the structure then vibration will be transmitted directly to the servo.
  • Temporarily assemble the fuselage sides and formers and pull the tail end together. A straight edge is then lined up over the hole in the servo arm that the pushrod will be connected to. The machinist's square represents the fore-aft and side-to-side location of the control horn.
  • Once you locate the pushrod exits, pull-pull cables will be used but the method is the same for pushrods.
  • Drill or cut the pushrod exits.
  • A mistake that is often made is lining up pushrod holes in formers with the servo when the arm is centered. That only works if the servo is far enough from the former to prevent binding when the servo arm is rotated to the point where the arm is closest to the former.

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Model Airplane Articles

» Introduction to Building
» Laying out the Fuselage
» Building inner fuselage
» Preparing the formers
» Jigging and Dry Fitting
» Building it Straight
» Front End
» Installing onboard gear
» Learning to Fly

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