[python] Re: Query about weight distribution
- From: jinlin wen <jinlwen@xxxxxxxxx>
- To: python@xxxxxxxxxxxxx
- Date: Fri, 30 Oct 2009 15:16:16 +0800
Dear Mr. Rhisiart Gwilym:
I am seventy now and had the same experience as you had. Although I really
admire the python riders,I gave up practicing anyway. I am riding my python
trike for two years now. I like it much. I think the geometry of my trike is
ok. I have gone through all different road surface and all weather. I
climbed quit steep hills. The traction was enough. It is an enjoyment riding
on ice because the surface is very smooth!
Jinlin Wen
2009/10/29 Rhisiart Gwilym <Rhisiart@xxxxxxxxxxxxxx>
> Hi Pythonauts!
>
> This bruised and strained learner-rider needs a bit of advice.
>
> My learning-curve on my Python bike is going pretty much as other
> Pythonauts have described their first attempts to ride. But I have a small
> problem. It's called 'old age': Every time that I fall off, or when I'm
> pushing wildly with my stretched fingertips against the ground to prevent an
> imminent fall, I seem to bruise or strain something. (Can scarcely type this
> morning because of a strained right hand)
>
> I guess it doesn't happen so easily to younger, more elastic bodies. Nor do
> the resulting minor injuries take so long to get painless, then heal. ('I
> was that way once myself', he mused sadly....)
>
> So -- ruefully -- I think that I have to bring forward the trike back-end
> for my Python, which I planned to build anyway, as an alternate for the
> single-wheel back-end. As well as avoiding the slightly worrying build up of
> little bodily problems from trying to stay on my Python for more than thirty
> metres (the struggle is also AMAZINGLY hard work; I'm sweating and panting
> within a minute or two of starting a practice session) I'm also concerned
> that it's going to take me a long time to get fluent enough at riding the
> bike to be able to go on the road in traffic. But I want to be able to use
> my Python this Winter, rather than my conventional bike. I keep no car, and
> I ride right through the year, as my main form of personal transport, but I
> had a couple of near-miss worrying incidents last Winter with my standard
> bike on icy roads.
>
> Besides this, I've designed into my version of the Python front end
> provision to be able to put a minimal all-weather John-Tetz-style zote-foam
> fairing onto it, or a fitted spandex cape at least, so that I can ride in
> heavy rain. Done a few lash-up experiments with this already, and I'm pretty
> confident that it'll work, even in gusty cross-winds.
>
> So, everything seems to be pointing towards a trike set-up, at least until
> I'm fluent enough with my Python-steering reflexes.
>
> That leads me to ask for some advice: I notice that some trikes have their
> back wheels set behind the rider's seat, whilst some have them set well
> forward, almost level with the rider. So how does the placing of the back
> wheels affect the percentage of the overall weight carried by the
> front-wheel -- **and how, therefore, is the crucial traction on
> wet/steep/gravelly surfaces affected?** This is my key question.
>
> My Python, like my other bikes, will have to be a serious work-horse, able
> to carry freight, and able to handle any weather conditions and any surface,
> on or off road. I notice that Henk's trike is a serious load-carrier, and
> Wen's seems to be pretty good too, and snow-capable.
>
> Any advice/experience from other Pythonauts about the best way to design my
> trike back end for this spec. is very welcome.
>
> I should say too that, despite being in the thick of ironing out the
> wrinkles at the moment, I really LOVE this bike, even though I can't stay on
> it yet. I can see it becoming my number one personal transport rig
> hereafter. Once again: thanks and respect, Jurgen, for the trail-blazing.
> Plenty of times the past few days I might have thought: 'I've made a big
> mistake here. This bike isn't rideable,' if I didn't know -- from the videos
> and the listees' accounts of their early adventures -- that that's not so.
> With that vital knowledge, I persisted, and already I can see progress in
> staying balanced and moving forward. But bloody hell I'm all bruises and
> strains, even though I've been practising on short, soft turf.
>
> Diolch yn fawr/danke schon/many thanks for all advice, Rhisiart G
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