01 جنوری 1986 Over the centuries, the treadle has been the most common method of using the legs to produce power. Treadles are still common in the low-power range, especially for sewing machines. Historically, two treadles were used for some tasks, but even then the maximum output would have been quite small,...
01 جنوری 1977 1) How to produce your own energy from a stationary bicycle (2) Perform kitchen tasks using pedal-powered equipment (3) Watch TV from electricity produced at home (4) Actual building instructions for a newly designed energy cycle! 133 pages, illustrated, photos