safe wrote:There are two types of people on this forum. There are those that use hub motors and there are those that use chains along with some type of gearing. The "bottom line" is that for the same power output from a given motor the geared bike can span a range of roughly double it's fixed gear counterpart. So the "high low" of hill climb verses top speed means you get twice as much out of the same motor with gears. On the flip side, you can use a hub motor and then simply double the voltage (and power) and get more or less the same result. Both are illegal in most places (depending on your local laws for motor power and acceptable top speed) so it's up to you how you want to break the law if that's what you had in mind. (mine does 40 mph on the flat with a 1000 watt motor)
I like gears myself... it allows me to use a smaller motor and when it comes to a hill I simply slow down and gear down rather than go for the "Big Iron" hub motor and high voltage to force my way though. The police seem to like the idea of a small motor being used with gears. (at least they seemed to like it when I showed it to them)
Rassy wrote:Hi fitek. Sounds like a fun project. Do you have pictures posted? My brother (the non ebike puriest) pulls a one wheel "Bob" trailer behind his SWB Burley recumbent on multi-day multi-hundred mile tours, so I know you could pull a heavy trailer with a recumbent. If I was younger and wanted a narrow ride, (instead of my trike), I would start with a LWB recumbent with 20" wheels, add a "Bob" trailer with a 20" wheel, put hub motors in all three wheels, and carry the batteries on the trailer. At 36V this would probably go up most SF hills with moderate pedaling, and at 48V with no pedaling. It could be very stealthy, and the trailer could still have room to pack stuff.
P.S. I was born in SF in 1940, but have been a "native" oregonian since 1941.
xyster wrote:How does the bion-x system work?
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