dennis
10 W
After testing the system for over 500 miles, I am going to give a brief review of the Bionx PL500HS system paired with a Schlumpf high speed drive. Top speed is 26 mph on the flats throttle only with a combined weight of rider and bike of about 200lbs with a spare battery carried in a backpack. When I pedal along at full throttle, max speed is 29 to 30 mph on the flats, but it's really exhausting to try to keep that up for more than a couple of miles but it's a great work out and the pedal cadence is kept at a normal pace with the Schlumpf HS drive, even at speeds above 26 mph at full throttle and when pedaling down a steep hill non assisted at over 40mph. Range is pretty good if I pedal alot, about 38 to 45 miles per battery. Full throttle blasts at top speed with pedal assist would reduce that to about 18 to 20 miles per battery, but at that speed I have not encountered many road bikes that can keep up with me for more than 2 to 3 miles on the flats, even when they are drafting close behind me. Except for one that did pass me at the end of a 43 mile ride during a 2 mile sprint when I was too worn out to pedal assist much above 27mph, but I still caught and passed him at mile 3 using throttle only at about 24 mph, when he reached his V02 max. Going uphill, No non assisted bike can keep up, speeds can be as high as 18 to 20mph when I pedal assist. On steep down hills, road bikes have about a 5-6 mph edge due to the cogging effect of the hub motor but because it's a high speed low torque motor, the cogging is not as bad as the higher torque PL350 motor that I used to own. Top downhill speed so far combined with vigorous pedaling is 42-43mph. If I use the throttle at these downhill speeds, I noticed that it actally adds drag to the spinning motor. Another thing I noticed is when pedaling with zero motor assist above 18 mph, the battery gains charge.
Schlumpf high speed drive specs: low gear retains normal ratio for the 52T front crank ring, but at high gear it's increased by 2.5 times, ineffect turns it into a 130T front crank ring. 14T-28T freewheel.
a few pictures of the bike at Malibu Bluffs Park, Calif. see link for more info: http://www.utahtrikes.com/ARTICLE-33.html



Schlumpf high speed drive specs: low gear retains normal ratio for the 52T front crank ring, but at high gear it's increased by 2.5 times, ineffect turns it into a 130T front crank ring. 14T-28T freewheel.
a few pictures of the bike at Malibu Bluffs Park, Calif. see link for more info: http://www.utahtrikes.com/ARTICLE-33.html


