RECUMBENT BICYCLE TRANSMISSION
RECUMBENT BICYCLE TRANSMISSION
(OP)
looking for a cure to what ails me...... I am designing a drivetrain for a front wheel drive, front wheel steering, recumbent HPV. I am currently trying to set it up like the cal berkley transmission which uses a jackshaft, two chains, and four gears. The main gear is the bike cranks then directly behind the main is the secondary gear which is coupled to a bigger gear. The second chain runs from the bigger gear along the pitch of the fork to the 16t sprocket which is attached to the internally geared hub. pics at http://calhpv.berkley.edu/pics/frontdrivetrain.jpg
THE PROBLEM THAT I HAVE IS THAT THE WESTERN HPV'S ARE MEANT TO GO FAST AND STRAIGHT. WHEREAS THE ONE WE ARE DESIGNING IS GOING TO HAVE TO TAKE TURNS AS WELL. SO HOW DO I REDUCE THE CHAIN FRICTION THAT WILL BE CAUSED WHEN STEERING AND KEEP THE CHAIN FROM POPPING OF THE HUB.
THANKS
THE PROBLEM THAT I HAVE IS THAT THE WESTERN HPV'S ARE MEANT TO GO FAST AND STRAIGHT. WHEREAS THE ONE WE ARE DESIGNING IS GOING TO HAVE TO TAKE TURNS AS WELL. SO HOW DO I REDUCE THE CHAIN FRICTION THAT WILL BE CAUSED WHEN STEERING AND KEEP THE CHAIN FROM POPPING OF THE HUB.
THANKS





RE: RECUMBENT BICYCLE TRANSMISSION
RE: RECUMBENT BICYCLE TRANSMISSION
My moonbugy took second place and the following is a link to a photo of it in action. It was not my moonbuggy but my team's but I designed the frame, suspension, and drivetrain. By the way, I was a non-traditional student and was asked several times if I was a professor which I quickly corrected by saying I was a student.
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RE: RECUMBENT BICYCLE TRANSMISSION
I agree with Bill about using the driven rear wheel.
While neither pro nor professor, I have build a couple hp trikes and found that the KISS principle holds very true.
My winter project this year is to move to a fully drive-shaft driven vehicle with a transmission.
Recumbents are meant to be laid back!
Griffy