[python] Re: python Digest V11 #67
- From: Howard Stevens <hstevens94@xxxxxxxxx>
- To: python@xxxxxxxxxxxxx
- Date: Tue, 26 Nov 2013 20:13:25 +1000
That link seems to be a problem...try
http://youtube/YQ9KTTJJhLE<http://www.youtu.be/YQ9KTTJJhLE>
Sorry folks Cheers Howard
On Tue, Nov 26, 2013 at 8:01 PM, Howard Stevens <hstevens94@xxxxxxxxx>wrote:
> Hullo pythonites,
> Well I have finally completed my trike and had a very successful road
> test. This can be seen on http://www.youtu.be/YQ9KTTJJhLE
> You may recall the discussions about pivot angle with trikes and my
> decision to go for an angle of 55 degrees. I also put a steering damper on
> as well ( from a VW beetle). The test has gone very well without any
> noticeable PSI and very limited wheel flop. It is ok without the damper
> too, but I like the firm steady feel with it, and it is nice that it holds
> the front wheel from falling over when parked. To allow my design to fold
> necessitated that the pivot be in front of the hips and it is about 100mm
> in front of the line of the hips, but it seems, without any
> problems. Anyway have a look, and I will be interested in any further
> comments. Best wishes Howard
>
>
> On Thu, Oct 24, 2013 at 3:07 PM, FreeLists Mailing List Manager <
> ecartis@xxxxxxxxxxxxx> wrote:
>
>> python Digest Wed, 23 Oct 2013 Volume: 11 Issue: 067
>>
>> In This Issue:
>> [python] python on eBay
>> [python] Re: izzy bike
>> [python] Re: izzy bike
>> [python] Re: izzy bike
>> [python] Re: izzy bike
>>
>> ----------------------------------------------------------------------
>>
>> Date: Wed, 23 Oct 2013 13:56:51 +0200
>> From: =?ISO-8859-1?Q?J=FCrgen_Mages?= <jmages@xxxxxx>
>> Subject: [python] python on eBay
>>
>> Forwarding this for Mark:
>>
>>
>> > Hello everyone
>> > I just thought I would draw your attention to the python I am selling on
>> > eBay. It was one of two made by Neil Stanley a few years ago. I
>> > butchered the smaller of them to fit me and am keeping it, but this one
>> > remains untouched. It would suit someone very tall. I think Neil is
>> > around 193 cm, with legs to match.
>> >
>> > Here's the eBay link:
>> >
>> >
>> http://www.ebay.co.uk/itm/recumbent-bicycle-/221301006533#ht_386wt_1170=20
>> >
>> > Cheers
>> >
>> > Mark
>>
>>
>>
>> ------------------------------
>>
>> From: Steffen Risse <big.skangster@xxxxxxxxx>
>> Date: Wed, 23 Oct 2013 15:02:32 +0200
>> Subject: [python] Re: izzy bike
>>
>> Hi Vi [haɪ̯fɪ <http://de.wikipedia.org/wiki/Liste_der_IPA-Zeichen>] ;o),
>> but friction isn't a conastant ratio, and the angle the steering bar has
>> for a certain steering angle will change every time. maybe the steering
>> bar
>> is sometimes allready like full conrering, but you're still going
>> straight.
>> The clamped pullies prevent such situations as long as they don't brake.
>> Steffen
>>
>>
>> 2013/10/23 Vi Vuong <vi_vuong@xxxxxxxxx>
>>
>> > Hi Steffen,
>> >
>> > Friction steering should be similar to the Izzy's pulley design in a
>> sense
>> > that input angle is greater output angle due to slippage. However, the
>> > "ratio" depends on the input force / slippage. It would be cool if speed
>> > sensitive steering is achievable with python. Will report back after
>> more
>> > experimentation. Here is the handlebar set up I am using,
>> > http://en.openbike.org/wiki/FP02
>> >
>> > Vi
>> >
>>
>>
>> ------------------------------
>>
>> Date: Wed, 23 Oct 2013 15:11:31 +0200
>> From: =?UTF-8?B?UGV0ZXIgxaB2YW7EjcOhcmVr?= <peter.svancarek@xxxxxxxx>
>> Subject: [python] Re: izzy bike
>>
>> Content-Type: text/plain; charset=UTF-8; format=flowed
>> Content-Transfer-Encoding: 8bit
>> What about using pulleys and rope(cable) anchored to pulleys so they
>> wouldn't rely on friction?
>>
>> Dňa 23. 10. 2013 15:02 Steffen Risse wrote / napísal(a):
>> > Hi Vi [haɪ̯fɪ <http://de.wikipedia.org/wiki/Liste_der_IPA-Zeichen>]
>> ;o),
>> > but friction isn't a conastant ratio, and the angle the steering bar
>> > has for a certain steering angle will change every time. maybe the
>> > steering bar is sometimes allready like full conrering, but you're
>> > still going straight. The clamped pullies prevent such situations as
>> > long as they don't brake.
>> >
>> > Steffen
>> >
>> >
>> > 2013/10/23 Vi Vuong <vi_vuong@xxxxxxxxx <mailto:vi_vuong@xxxxxxxxx>>
>>
>> > Hi Steffen,
>> >
>> > Friction steering should be similar to the Izzy's pulley design in
>> > a sense that input angle is greater output angle due to slippage.
>> > However, the "ratio" depends on the input force / slippage. It
>> > would be cool if speed sensitive steering is achievable with
>> > python. Will report back after more experimentation. Here is the
>> > handlebar set up I am using, http://en.openbike.org/wiki/FP02
>> >
>> > Vi
>> >
>>
>>
>>
>>
>>
>> ------------------------------
>>
>> From: Steffen Risse <big.skangster@xxxxxxxxx>
>> Date: Wed, 23 Oct 2013 16:25:44 +0200
>> Subject: [python] Re: izzy bike
>>
>> that's what izzy does
>>
>> 2013/10/23 Peter Švančárek <peter.svancarek@xxxxxxxx>
>>
>> > What about using pulleys and rope(cable) anchored to pulleys so they
>> > wouldn't rely on friction?
>> >
>> > Dňa 23. 10. 2013 15:02 Steffen Risse wrote / napísal(a):
>> >
>> > Hi Vi [haɪ̯fɪ <http://de.wikipedia.org/wiki/Liste_der_IPA-Zeichen>]
>> ;o),
>> > but friction isn't a conastant ratio, and the angle the steering bar
>> has
>> > for a certain steering angle will change every time. maybe the steering
>> bar
>> > is sometimes allready like full conrering, but you're still going
>> straight.
>> > The clamped pullies prevent such situations as long as they don't brake.
>> >
>> > Steffen
>> >
>> >
>> > 2013/10/23 Vi Vuong <vi_vuong@xxxxxxxxx>
>> >
>> >
>> > Hi Steffen,
>> >>
>> >> Friction steering should be similar to the Izzy's pulley design in a
>> >> sense that input angle is greater output angle due to slippage.
>> However,
>> >> the "ratio" depends on the input force / slippage. It would be cool if
>> speed
>> >> sensitive steering is achievable with python. Will report back after
>> more
>> >> experimentation. Here is the handlebar set up I am using,
>> >> http://en.openbike.org/wiki/FP02
>> >>
>> >> Vi
>> >>
>> >
>> >
>>
>>
>> ------------------------------
>>
>> Date: Wed, 23 Oct 2013 18:24:18 +0300
>> Subject: [python] Re: izzy bike
>> From: Tihamer Juhasz <balamber@xxxxxxxxx>
>>
>> One more detail: I contacted the creator of the Izzy on FB and asked about
>> handling. This is what he told me:
>> The bike is very easy to ride and manoeuvrable but it takes a few minutes
>> to get use to it. This is because, just like you've noticed, caused by the
>> wire. It's a bit like learing to ride a bike again , once you get the hang
>> of it, it's all smooth sailing from there!
>>
>> End of quote.
>>
>> Learning to ride the Python definitely takes longer than a few minutes. So
>> it would be really interesting to try this ride-by-wire approach on a
>> Python.
>>
>> Tiha
>>
>>
>>
>> On Wed, Oct 23, 2013 at 5:25 PM, Steffen Risse <big.skangster@xxxxxxxxx
>> >wrote:
>>
>> > that's what izzy does
>> >
>> >
>> > 2013/10/23 Peter Švančárek <peter.svancarek@xxxxxxxx>
>> >
>> >> What about using pulleys and rope(cable) anchored to pulleys so they
>> >> wouldn't rely on friction?
>> >>
>> >> Dňa 23. 10. 2013 15:02 Steffen Risse wrote / napísal(a):
>> >>
>> >> Hi Vi [haɪ̯fɪ <http://de.wikipedia.org/wiki/Liste_der_IPA-Zeichen>]
>> ;o),
>> >> but friction isn't a conastant ratio, and the angle the steering bar
>> has
>> >> for a certain steering angle will change every time. maybe the
>> steering bar
>> >> is sometimes allready like full conrering, but you're still going
>> straight.
>> >> The clamped pullies prevent such situations as long as they don't
>> brake.
>> >>
>> >> Steffen
>> >>
>> >>
>> >> 2013/10/23 Vi Vuong <vi_vuong@xxxxxxxxx>
>> >>
>> >>
>> >> Hi Steffen,
>> >>>
>> >>> Friction steering should be similar to the Izzy's pulley design in a
>> >>> sense that input angle is greater output angle due to slippage.
>> However,
>> >>> the "ratio" depends on the input force / slippage. It would be cool
>> if speed
>> >>> sensitive steering is achievable with python. Will report back after
>> more
>> >>> experimentation. Here is the handlebar set up I am using,
>> >>> http://en.openbike.org/wiki/FP02
>> >>>
>> >>> Vi
>> >>>
>> >>
>> >>
>> >
>>
>>
>> ------------------------------
>>
>> End of python Digest V11 #67
>> ****************************
>>
>>
>
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