Saturday, June 13, 2015

Instillation Of Rudder Cables In Cockpit Area Begins

Not wanting to leave the hangar the other day when it was discovered the cap on the epoxy tube had split open, decided to jump ahead and begin pulling in the left rudder cable. This is area of concern because the left rudder cable and the static line need to cross one another. Frequent readers of the DOG Aviation Blog may recall the static air line for the backup instruments was moved from the center tunnel side of the pilot’s seat rib to the other side of the rib because of interference with the left flaperon pushrod. The center tunnel was chosen initially for the static line because the rudder cable routing is on the back side of the seat rib adjacent to the center tunnel.

Prior to deciding to relocate the static line to the back side of the pilot’s seat rib quite a few measurements were taken and it appeared there would be no conflicts with the rudder cable as long as the static air line remained low and then swooped up and crossed the rudder cable just aft of the “box” for the flaperon mixer arm pivot point. One truly never knows until the parts are installed ... but this proved to be true because at the point where the static line crosses the rudder cable, the rudder cable is in a protective plastic sleeve so there will be no chafing on the static air line.
Beginning the instillation of the left rudder pedal cable. The rudder cable is routed forward through grommets already placed in the bulkheads.

Each F-1239 rudder cable comes pre-made with two plastic sleeves on each cable. The 11 1/2" plastic sleeve is attached onto the forward portion of the seat rib with three Adel clamps and becomes a tubular guide for the rudder cable in this area. I know there are fellow builders that are also planning to install a static line for backup instruments. I made a point of taking a couple of extra detailed photos for aids should you decide to utilize the same static line routing.
The left F-1239 rudder cable installed onto the seat rib with Adel clamps. The static line comes from below and crosses the plastic rudder cable tubing forward and well clear of the moving rudder cable.
Photo looking aft shows how the static line swoops up and crosses the rudder cable in an area where the plastic sleeve protects the static line.

This is a photo using an inspection mirror placed underneath the area where the static line crosses the left F-1293 rudder cable assembly. One can see the static line is well clear of the moving rudder cable.

Overall, I’m very pleased with the way the static line is now installed and clear of moving control system components.

Oh, have been forgetting to post photos of some thumbwheel ratchet wrenches I picked up a while back. These are great for in between the ribs to snug bolts and nuts that, if using a ratchet wrench, one only has enough room to get one click at a time. Using a thumbwheel ratchet wrench truly reduces the amount of time spent bending over when installing or removing the hardware in tight places.
Three inexpensive thumbwheel ratchet wrenches from Harbor Freight that have truly come in handy when working between the ribs or in tight places.