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"Fast Flyer Test Report"
(6/14/01)

Test Graphs

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I finally had a chance to run my modified Flyer today for about 30 miles (3 fast charges) at my usual rectangular test track. This site is up hill, down hill, and flat.......nice because the wind alternately helps and hinders speed, and therefore cancels out as a factor.

This Flyer is using a higher gear ratio than the stock units, and still performs quite well on hills even with the added top speed. The gearing is modified from 6:1 to 4.75:1, and results in about a 19 mph top speed on the flat runs. (170 lb rider) Actually, on the downwind runs, the modified Flyer hit a max speed of 21.2 mph. In addition to the gear ratio change, I've also installed a larger Cheng Shin tire on the rear, and "road tread" tire on the front. These tires also add somewhat to the increased speed. The freewheeling clutch system is still operative with this mod.

Previous dyno tests predicted speeds somewhere between 18.6 and 19.1. Not a bad simulation if I do say so myself! :) At full speed, the range was reduced to about 6.5 miles. However, at the more leisurely speed of 15 mph, (the stock Flyer speed) the range went right back up to about 8.5 miles.

I must say, I was impressed with the new front V-brake! This was my first opportunity to test it under higher speed conditions, and it is unbelievably good! In fact, from a full speed run down hill at about 20 mph, I was able to brake the scooter in a touch over 20 feet! Really. I tried it 3 times, applying stronger braking each time. On the last stop, I actually felt the rear wheel lift off the ground a few inches just before I came to a stop! It's almost TOO good!

I'd like to install one of my Hawker battery packs in this thing and re-run the tests. They should bring the full speed range up to about 10 miles. Hopefully, I'll get the time in the next few weeks.

Test Graphs

NOTE: Field tests (above) involve hills, wind, variable throttle settings, etc. Dyno
test results (below) are under controlled conditions. (for details, see Dyno Index)