I have a spinal cord tumor and have very little feeling, and limited range of motion, in my hands and arms. My legs are affected but I am able to walk fairly well without assistance.
I have a transmitter tray with hand rests, and I use the "joystick" knobs from this page
http://www.qualityrcproducts.com/pro...tterknobs.html
I sit on a metal shop stool while flying.
I have a hard time assembling/disassembling my models at the field. I'd actually be afraid to try to start any of my engines. If I do get cut, or burned, I do not feel it.
My brother and I fly together and he takes care of getting the planes set up and ready to go.
When I first joined the club I worked with the the club instructors. If my brother was not there, anything I couldn't do, they were always willing to help. One of the best things about being involved in RC is the people you meet.
I sometimes lose contact with the sticks and think I'm moving them when I'm not. I also tend to accidentally move the throttle/rudder stick without realizing I'm doing it. Because of this I'll always be on a trainer cord. I've had several complete flights (takeoff to landing) where my brother never had to take control. I've had a lot more where he's had to save it.
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Enough about me
One of our club members has to use an electric scooter to get around. He devised a tow rope for times his engine dies on the runway. If he ends up somewhere his scooter cannot go, someone runs out to help him.