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understanding_pedal_power [2007-07-11 17:31] – nik | understanding_pedal_power [2007-07-11 17:32] – nik | ||
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an output of 50 watts for the desired period, the driven device | an output of 50 watts for the desired period, the driven device | ||
will receive 45 watts input. | will receive 45 watts input. | ||
+ | |||
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- | o | + | - The first is the upright position used by the majority of cyclists around the world. |
- | of cyclists around the world. | + | |
saddle, is located slightly behind where it would be if it were a | saddle, is located slightly behind where it would be if it were a | ||
seat, or vertically above the crank axis; the hand grips are | seat, or vertically above the crank axis; the hand grips are | ||
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pedal spindle at the pedal' | pedal spindle at the pedal' | ||
- | + | - The second position is the position used by riders of | |
- | o | + | |
racing bicycles with dropped handlebars, when they are holding | racing bicycles with dropped handlebars, when they are holding | ||
the upper parts of the bars. Their back is then at a forward | the upper parts of the bars. Their back is then at a forward | ||
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resistance to overcome. | resistance to overcome. | ||
- | + | - The third position is the position used in modern semi-recumbent bicycles. The placement of the center of the pedaling | |
- | o | + | |
- | bicycles. | + | |
circle relative to the seat is shown in Figure 4. In this seating | circle relative to the seat is shown in Figure 4. In this seating | ||
position, the pedaling forces are countered by the lower back | position, the pedaling forces are countered by the lower back |