Over the past decade or so, I've "designed" several projects, but have only built a couple. Consequently, I can't legitimately publish Instructables for my ideas, since I don't actually know whether they can be built. However, I can publish slideshows of the cool drawings I've made :-)
This is a design for a three-wheel handcycle
, which is intended to be used without assistance by the rider, with a powered lift and lever-controlled actuator.
All of these drawings were done using the Unix |xfig| utility.
My guess as to a "complete" parts list
suggests that the project would cost well over $600, comparable to the price of a commercial "scooter lift" for a car.