[python] Re: Bipolar update
- From: Vi Vuong <vi_vuong@xxxxxxxxx>
- To: "python@xxxxxxxxxxxxx" <python@xxxxxxxxxxxxx>
- Date: Sat, 26 Nov 2011 20:56:38 -0800 (PST)
Hi Jürgen,
Here is a bonus for you, RWS. Turning radius can be reduced quite a bit with
more rear steering input, while the legs are still in command (subconscious?).
http://www.youtube.com/watch?v=IZ0KiW1t0m8
For your build, I would suggest starting out with a suitcase and build the bike
to fit inside. Best of luck, especially with alignment...
Vi
>________________________________
> From: Jürgen Mages <jmages@xxxxxx>
>To: python@xxxxxxxxxxxxx
>Sent: Friday, November 25, 2011 12:50 PM
>Subject: [python] Re: Bipolar update
>
>Thanks Vi,
>
>you are really into something special with your Bipolar!
>
>I follow its development with big interest. The double-pivoted bike seems to
>run smoothly and the foldability without any screwing/locking mechanism is
>unique. If I had the time I would build my own version with my hammock-style
>seat, which should fold even smaller ... what the heck, I want to start with
>the building next week ;-)
>
>Keep up the good spirit and thanks for sharing,
>Jürgen.
>
>
>On 25.11.2011 17:12, Vi Vuong wrote:
>> The Bipolar has evolved. Initially, rear was controlled / locked by
>> the seat back, then loosen, and now completely free. The two-piece
>> compact seat was also too uncomfortable, especially at lower back
>> where the 2 pieces meet, so it's replaced by a full seat which brings
>> back upper body control.
>>
>> The free rear wheel auxiliary steering is a little different, but can
>> be learned in minutes. AWS steering was not the original goal, but
>> now that the rear pivot is not occupied by the seat post, the rear
>> wheel can be controlled by a handle bar for a RWS study, should be
>> fun...
>>
>> Walking was horrible (embarrassing among pedestrians), as both wheels
>> want to collapse/flop, plus the 2-piece seat was not helping either.
>> Together with the new seat, a locking mechanism made from seat post /
>> clamp couples the wheels so they can roll together when folded. Now
>> walking the bike is quite pleasant, kind of like a Brompton but
>> without the roller wheels...
>> http://www.youtube.com/watch?v=itKxrl2Syk0
>>
>> Cheers,
>>
>> Vi
>
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