I use "thingie" in the title to not give anyone a false impression of
what I do or don't know.
I'm working with a client who's using one of these in his specialized
bike:
<(Amazon.com product link shortened)
tag=dradisplay-20&ascsubtagÇ3ee0e485a804ac76001596b2b029f4_S>
He's currently using the 250W version, but we're having problems of insufficient torque -- this is partially due to re-purposing a board, and we're on top of that part, but I'm thinking ahead (well, borrowing trouble, in proper engineering fashion). So we thought -- hey! We'll use the 350W version (that's the one in the link).
The problem is that the 350W version actually has a lower current-to- torque constant -- it gets its higher power through pulling more current for the torque, and delivering more speed.
So -- any thoughts on an easy way to gear the thing down? I just recommended to the customer that they put two chain rings on the crank, so that they can drive the pedals at one speed and the bike at another.
I'm working with a client who's using one of these in his specialized
<(Amazon.com product link shortened)
He's currently using the 250W version, but we're having problems of insufficient torque -- this is partially due to re-purposing a board, and we're on top of that part, but I'm thinking ahead (well, borrowing trouble, in proper engineering fashion). So we thought -- hey! We'll use the 350W version (that's the one in the link).
The problem is that the 350W version actually has a lower current-to- torque constant -- it gets its higher power through pulling more current for the torque, and delivering more speed.
So -- any thoughts on an easy way to gear the thing down? I just recommended to the customer that they put two chain rings on the crank, so that they can drive the pedals at one speed and the bike at another.
--
Tim Wescott
Wescott Design Services
Tim Wescott
Wescott Design Services
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