Quote:
Originally Posted by corksil
......... It's wonderful that we have reached a point in human history where we have the technology to freely communicate complex thoughts to people who are hundreds or thousands of miles away.
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I think that a very relative variable to consider is atmospheric density. We can all agree that a motorcycle runs quite differently depending on the weather condition.
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Yes, it is a wonderful thing that we did not have available back in the day: we had to dig into books and bust our knuckles wrenching.
Hot-humid weather not only reduces the performance of engines, but increases viscosity of the air (behavior that is opposite to the one for liquids, like oil).
http://www.engineeringtoolbox.com/ai...ity-d_601.html
Higher viscosity of the air means that it is a little harder for it to go through the air filter and intake passages.
The part of aerodynamic drag that depends on friction among layers of still air and the surfaces of the bike and rider, is also a little higher in hot weather.
Some compensation to the above comes from the fact of lower number of molecules (less density) have to be disturbed and pushed around by the bike while going through at high speeds.
Notice that
is the density of air in this equation of drag force.
https://en.wikipedia.org/wiki/Drag_coefficient
