[python] Re: Pythonjetrike
- From: Vi Vuong <vi_vuong@xxxxxxxxx>
- To: "python@xxxxxxxxxxxxx" <python@xxxxxxxxxxxxx>
- Date: Wed, 5 Oct 2011 20:19:36 -0700 (PDT)
The angle on both pivots is ~60/120 deg, and feels like a good compromise
between PSI and wheel flop. On good surface, the bike is quite easy to ride.
My tadpole design / build is in slow-cook mode. In the mean time, I can bring
the Bango quad out to the same gravel trail to do some skidding...
Vi
>________________________________
>From: Dirk Bonné <dirk.bonne@xxxxxxx>
>To: python@xxxxxxxxxxxxx
>Sent: Wednesday, October 5, 2011 6:00 AM
>Subject: [python] Re: Pythonjetrike
>
>
>I say its the shallow angle of the pivot that is falt. From the first video it
>is very clear that the bike collapses at the pivot. May be we can conclude
>that a python with its shallow pivot angle is just not very good when skiding
>sideways on the front wheel? Be it 2 wheels, or 3 wheels delta tilting. We
>have no info for the 3 wheels non tilting python, although a few got made
>(e.g. jürgen).
>
>Dirk
>
>On 05.10.2011 08:02, Vi Vuong wrote:
>Here are my observation of bicycle wheel slippage and fall modes, on gravel
>and sand
>>http://www.youtube.com/watch?v=ktfReCRgUOM
>>
>>http://www.youtube.com/watch?v=nWmgzolU55Q
>>
>>
>>It seems that FWD makes slippage worse / harder to recover.
>>Would Tadpole 2WD help? Maybe with tilting locked?
>>
>>
>>Vi
>>
>>
>>
>>>________________________________
>>>From: Patrick van Gompel <patrick_van_gompel@xxxxxxxxxxx>
>>>To: python@xxxxxxxxxxxxx
>>>Sent: Sunday, October 2, 2011 9:00 AM
>>>Subject: [python] Re: Pythonjetrike
>>>
>>>
>>>
>>>I doubt whether a tilting mechanism is a disadvantage if you compare it with
>>>a 2 wheeled Python. I had the front wheel slip on both the Python and the
>>>tilting trike. Not sure which one would slip and fall first, but when I did
>>>fall both events went differently. The Python slid away from me, I put one
>>>feet on the ground but the bike fell. It hit the pedal and handle bar, then
>>>the seat. I myself went foot first, then onto my bottom. I wasn't hurt (only
>>>a few scratches) and the good thing was that the bike seems to go away from
>>>the rider (like with my recumbent), which is much safer than a conventional
>>>bicycle (entanglement). On the trike; the front wheel slipped and I put one
>>>foot on the ground so the bike didn't fell over. Since this was a test, I
>>>knew it was comming and was one step ahead. Otherwise, I think you are more
>>>likely to hit bike parts (tires) when you fall than with a Python.
>>>
>>>My experience with cycling through the snow is
like this: fresh or wet snow is ok for most bikes,
although not really for a recumbent. Snow that is
there for a few days and has been driven over
makes things quite a bit harder. A mountainbike
with soft open tires might still do. When things
get really nasty I always prefer the classic
citybike, since there is less pressure on the
frontwheel compared to a mountainbike and it is
easier to put a feet on the ground to stay in
control and slip through corners ;-)
>>>
>>>Patrick
>>>
>>>
>>>
>>>> Date: Sun, 2 Oct 2011 16:23:11 +0200
>>>> From: dirk.bonne@xxxxxxx
>>>> To: python@xxxxxxxxxxxxx
>>>> Subject: [python] Re: Pythonjetrike
>>>>
>>>> Thanks Patrick and George
>>>>
>>>> @George: I meant the question more like: is
the tilting mechanism a
>>>> disadvantage (compared to a 2 wheeled
python) instead of just "no use"
>>>> when the road is slippery. Sorry for having
asked my question so unclear.
>>>>
>>>> Thanks Patrick. If the winter is as hard as
has been in the last 2 years
>>>> then I should build a non-tilting trike
solution for my pythoon. I think
>>>> I could easily make a "2 wheel module" that
I put under the box of the
>>>> pythoon making the wheel base short, and
thus allow for a relative
>>>> narrow trike.
>>>>
>>>> Dirk
>>>>
>>>>
============================================================
>>>>
>>>> This is the Python Mailinglist
>>>>
>>>> //www.freelists.org/list/python
>>>>
>>>> Listmaster: Jurgen Mages jmages@xxxxxx
>>>>
>>>> To unsubscribe send an empty mail to
>>>> python-request@xxxxxxxxxxxxx
>>>> with 'unsubscribe' in the subject field.
>>>>
>>>>
============================================================
>>>>
>>>
>>>
>>>
>
============================================================ This is the Python
Mailinglist //www.freelists.org/list/python Listmaster: Jurgen Mages
jmages@xxxxxx To unsubscribe send an empty mail to
python-request@xxxxxxxxxxxxx
with 'unsubscribe' in the subject field.
============================================================
>
>
Other related posts:
