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RV-7A Tip-up QB build project
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Date:  10-3-2012
Number of Hours:  9.50
Manual Reference:  
Brief Description:  Roll servo installation....

With the conduit and all other fittings installed and secure I realized that the autopilot roll servo has to be installed on this wing and is a million times easier to install with the skin still off, so the riveting I planned to do all day with the gardener is again delayed.

First problem was that although we hav the servo, we have no installtion kit and I can not afford to delay the wings even more by waiting for that to arrive from the US, so I researched this, downloaded all the necessary drawings, and went about designing my own 'installation kit' as such with a bracket that secures the servo in place to replace the standard bellcrank bracket already fitted on the spar. I drew up this bracket from Dynon drawings and fabricated it from more than sufficient .080 steel (cut from an already powder coated unused wall shelf bracket) and marked and drilled the bolt locations extremely carefully as this was the most critical for proper alignment and placement of the servo in relation to the aileron arms and bellcrank.

I then made up the actuator arm from leftover chromoly tubing which I sleeved and rod ends. Adjusted then saftied the arm to the exact size stipulated with our specific parts and installtion in mind.

I also started making a support bracket for the back of the servo as per Dynon's kit but have to revise this later. Test fitted the whole assembly at the end of the day only to find one of the bracket bolts completely sheared inside the platenut...a platenut hidden behind the spar, covered by the leading edge structure and the wing tank...it all has to come off!!!
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