[python] Re: Fw: Positive Trail using Hubless Wheel?

  • From: Vi Vuong <vi_vuong@xxxxxxxxx>
  • To: "python@xxxxxxxxxxxxx" <python@xxxxxxxxxxxxx>
  • Date: Wed, 27 Jul 2011 10:22:14 -0700 (PDT)


Here are couple of designs with positive trail and "rise" effect, but the rigid 
frame makes non-reptile ..:..:..(:
http://www.google.com/search?q=dirtsurfer

http://www.youtube.com/watch?v=qRL8eohthe4


Vi



>________________________________
>From: bren102 <bren102@xxxxxxxxx>
>To: python@xxxxxxxxxxxxx
>Sent: Tuesday, July 26, 2011 2:57 PM
>Subject: [python] Re: Fw: Positive Trail using Hubless Wheel?
>
>Hmm, it seems to me not necessarily a flevo or speculoos type steering as they 
>have no seat rising effect to aid stability.
>
>As a technical exercise - looking at Dirk's python, extend the steering head 
>forward horizontally to within the front wheel, but not past the front wheel 
>axle, maintaining the same steering angle until the trail is positive.
>
>The seat rising effect still applies as the steering head is still at the same 
>angle and is not horizontally higher than the front wheel axle. 
>
>So, a python with positive trail!
>
>Maybe I should create a diagram?
>
>Regards,
>
>Brendan
>
>
>--- On Mon, 7/25/11, Michael Ostermeier <list@xxxxxxxxxxxxxxxxxx> wrote:
>
>> From: Michael Ostermeier <list@xxxxxxxxxxxxxxxxxx>
>> Subject: [python] Re: Fw: Positive Trail using Hubless Wheel?
>> To: python@xxxxxxxxxxxxx
>> Received: Monday, July 25, 2011, 3:48 PM
>> Hi,
>> 
>> bren102 wrote:
>> > Perhaps the rider can be seated higher to maintain hip
>> alignment with the steering axis? 
>> 
>> Yes, but then you wont have a lowrider and end up having a
>> Flevobike.
>> 
>> >> >> […] may allow a python with positive
>> trail to be built.
>> 
>> This will get you a speculoos-type bicycle.
>> 
>> Regards
>> 
>> Miche
>> 
>> PS: see: http://en.openbike.org/wiki/Front_Wheel_Driven_Bicycle
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