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Perhaps you have seen those very streamlined recumbents, built with the aim of breaking a speed record.
Could such a record be improved?
Well, all of these record breaking HPV's use the power of the legs alone. And I looked up the speed record of a hand bike in a 200m sprint. It was 52 kph! So
it seems to me that if one would be pedaling with both arm and legs simultaneously, that one could go reasonably faster.
In fact, if one was built such a vehicle, I would suggest to use the superman position, that is, laying down belly downwards.In orde to be able to maintain a very good aerodynamic. Of course, an aerodynamic fairing would be needed as well. But I truly believe that such an HPV could break the world speed record. Thank you!
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Rowing bikes use a whole body action with both arms and legs engaged. |
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I know but they are slower than many recumbents |
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If you could integrate them smoothly, maybe, but
the arms are so much weaker than the legs that I
would expect the mechanism to combine the two
forces would hurt more than the legs would help. |
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Especially when you consider that most top level
cyclists who set this records have the upper body
strength of a 3 month old. |
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How long does the human have to keep going at
full power for these speed records? It seems like it
might take a minutes or two to get up to speed.
How long do they have to maintain that speed? If
it's very long, the cardiovascular fitness of the
cyclist may be the limiting factor. |
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If it's s short sprint, then yeah, you might be able
to go faster by burning out some extra muscles,
but the extra weight of the linkages to harness
arm power might be detrimental as well. |
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When going for these speed records, it's usually a 200m sprint with flying start. |
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Don't cyclists use arms for more leverage against the bike frame? |
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Usain Bolt's average is 37.58km/hr so a mechanically sprung, geared up stride length would be fun. But I don't think you'll get the 5 to 1 ratio an extreme track sprint cycle would have. |
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// Dual Propulsion
So, 2 people? |
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