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Carl Bells RV7A N947CB
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Date: 9-27-2007
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Number of Hours: 5.50
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Manual Reference: Modification
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Brief Description: Designing and building push-pull rudder system
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I am an above the knee left leg amputee and although I have a prosthetic, my artificial limb is not as effective as my real one. That being said, I do pretty well in most airplanes, however, I have to work very hard in some circumstances, such and heavy crosswind landings. Since this will be my personal plane, I want to add everything I need to make it a safe and enjoyable plane to fly, even for one legged pilots. So, today I took the time to design and start building a push-pull rudder for my RV 7. There are many ways to accomplish this, such as a full loop in the cable with pulleys on the firewall, or a rudder bar, etc. None of these seemed very robust or elegant, so I decided a simple horn on each rudder pedal bar with a simple bell crank between them. I will post a picture to shows how this will work and as soon as I finish it. I have taken a picture of the design drawing and you can get the idea from that. There is also a detachable aluminum stirrup strap that goes over the top of my right foot so I can pull for left rudder and push for right rudder. The strap attaches to two tabs welded to the right rudder pedal. There other safety item I will add is a hand brake. This is a dual cylinder unit made by Rotax that has a split lever for the left and right brake, or you can pull both together for both.
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Drawing and some parts made and primed
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