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Old 09-13-2013, 01:51 PM   #25 (permalink)
3-Wheeler
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Quote:
Originally Posted by Tesla View Post
....... when I pull the foot off the throttle to coast, deceleration seems to decrease at an exponential rate, once down to about 40mph it's like the only thing that slows her down is an incline, otherwise she just keeps rolling.......
I have two direct comparisons for coast down testing from 30 mph:

1) The Honda Insight with tail and smooth under-tray
2) 1985 VF500 Honda with custom full size fairing

Both vehicles are light-weight examples of each class, i.e. single-track and dual-track.

However, when EOC coasting, the Insight will *easily* coast a 1/4 mile on a flat section of road, while the motorcycle coasts only about 1/8 mile.

Same conditions, same section of road, similar outside temperature. Same road used to get to work for the past 20 odd years, with plenty of chances to compare the two.

The car keeps going, while the motorcycle has way more air drag for it's weight than the car does, and slows down much quicker.

Big difference in air drag at only 30 mph.

Jim.
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