Wednesday, June 6, 2018

Chapter 17 - Vance Atkinson's springboard and electric pitch trim systems

Updated 12/25/2019

Vance's canard is unique and shows a universal joint that isn't on the plans Cozy IV.   Rather than a manual rod, an actuator with feedback will be installed.  I don't think I'll need the component that mounts on the wheel well if the actuator has enough force.  It seems its purpose was to reduce the travel distance of the T-handle and to bias the trim so pulling the handled would provide up trim rather than down.

Vance later updated to an electric trim system, but a downside was if there was run away trim, needed to be disconnected to allow full elevator travel.   He accomplished this with a quick disconnect pin through the Heim joint.  We tried different springs to allow full travel if there was run away trim, but Vance did not care for the resulting stiffer/softer forces.



Here's a link to a photo of the plans to make a Davenport spring

4 comments:

  1. Vance, This is Sandy Roberts and I'm trying to connect with you. sanfordroberts1948@gmail.com

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