Neophyte seeking Masterful Wisdom

[csisfun]

I want a friction drive so that it attracts less attention. I mean, sure, the laws are on my side if I do it legally, but I hate trying to document stuff to people who may have no clue at all what wattage is, and, I suspect, have a blurry idea of the laws surrounding E-bikes. I do not have a budget, but I have already bought some 2200 3s 20C cells that I hope to parallel and series them so that I can get optimal duration and power. The shipment is kinda slow from Hobbyking though...

The problem still is the same, though. As much as I can get lots of inspirations from the pictures, I still cannot figure out how to make the swinging arm. Is it just a looser bolt, such that when the motor kicks in, the rotational forces will slide it to the wheels, and when off, the wheels will kick it away? No clue...

 

[MitchJi]

Hi,

I want a friction drive so that it attracts less attention. I mean, sure, the laws are on my side if I do it legally, but I hate trying to document stuff to people who may have no clue at all what wattage is, and, I suspect, have a blurry idea of the laws surrounding E-bikes.

You could just put a 200 watt decal on the motor and not worry about it :wink: :lol:.

 

[csisfun]

Another question: Could a knowledgeable person elucidate what is the problem with using a rigid mount (i.e. one which doesn't have an arm which swings to engage as power is turned on)?

THANKS!

 

[ev_nred]

Another question: Could a knowledgeable person elucidate what is the problem with using a rigid mount (i.e. one which doesn't have an arm which swings to engage as power is turned on)?

THANKS!

just asking why is it a problem to have an arm that swings? just asking.
cheers,
jacob R

 

[Thud]

Another question: Could a knowledgeable person elucidate what is the problem with using a rigid mount (i.e. one which doesn't have an arm which swings to engage as power is turned on)?

Not sure I qualify as a "Knowledgable person"

please see answer #3 in the 1st reply to this thread.

 

[Hillhater]

Another question: Could a knowledgeable person elucidate what is the problem with using a rigid mount (i.e. one which doesn't have an arm which swings to engage as power is turned on)?

THANKS!

The reason for the "swinging arm" motor mount is to allow the motor to dis engage from the tyre when not powered up.
This allows the bike to be ridden using pedals with no friction drag from the motor.. which can be significant if you have for pedal for a long time... These drives are designed for intermittent assistance ..IE up hills, or reducing high speed effort ... rather than completely eliminating the need to pedal.
DO NOT use the ESC brake function to slow the bike ..it wont work and will burn the ESC. Learn to ride as any other motorised vehicle..IE cut power to the motor before using the brakes ! ( although with only 200w, bike brakes will easily stop the motor also...but again will damage the motor &/or the ESC !)
Aluminium can be cut and shaped easily with simple hand tools.. a Hacksaw ($15) , a file ($10) and a hand drill.
I would not attempt to fabricate such a drive using wood, but possibly some polycarbonate plastic would work if you are still frightened of aluminium.