Rick Randazzo <[email protected]
> it is a crazy mix of conservatives and liberals... i think it is pretty
> much the same everywhere ... i will skip answering this directly
> the batteries part seems to be messed up (maybe me) should be a 36 volt
> pack , that would be 12 - 3.2 volt , 10Ah cells ... (right?)
> the motor is rated 350 to 500 Watts.
> i really have no idea of the speed and we have not done any exact
> calculation on how long you can drive before recharge. He drove the thing
> quite a bit the day i gave it to him but never ran the battery low enough to
> slow him down... it only has a green, amber and red light and the green
> never went off... took 1.5 hour to charge.
> The guy called me this morning to tell me he got to work in 15 minutes and
> it was great. he did say not as fast as he could have gone peddling - i need
> to ride it and let him give chase so he can see that it really clips along.
> your perspective on speed changes when you are not having to peddle.
> the funny thing about china is they build stuff for export. a lot of things
> they export you really cannot get in a shop on the street. you never see a
> bike like this driven by the locals. you can buy a little bike that looks
> like a girls bike - or the scooter things - but would you ride that ? most
> foriegners would not be caught dead on them ... my original plan was to
> build it just to do testing on the batteries. then when this guy decided he
> wanted me to convert his bike... the people here think i am crazy for
> converting instead of just buying but i really enjoyed the project. i had
> not planned on trying to sell them but there are several people showing
> interest now. this is suppose to be the first step in a process. the idea is
> to creat something people need and have been asking about ....
> i see on ebay someone in florida selling the kit for the same price it cost
> me here in china ..... he must have imported a slew of them.
> On Sat, Nov 27, 2010 at 12:51 AM, Martin WINLOW <[email protected]
>> On 26 Nov 2010, at 00:35, Rick Randazzo wrote:
>> > Hi all.
>> > i have been working on a new project much closer to my long (long
>> > long long)
>> > time goal of actually building electric vehicles.
>> > i got fed up with CALB (another long story that i have avoided
>> > posting but
>> > may still yet...) and wanted to find a decent LiFePO4 battery
>> > supplyer and
>> > came across a factory near my adopted home here in China (Guangzhou)
>> > but the
>> > largest format they make is 20Ah packet cells. most of what they
>> > produce is
>> > for toys and e-bikes.
>> > i had been telling a friend ( another foriegner here ) that i was
>> > going to
>> > build an electric bike to do testing with. one day we went to dinner
>> > and he
>> > had decided quite emphatically that he wanted me to build him an
>> > electric
>> > bike. he was sick of getting to work drenched in sweat or having to
>> > fight
>> > for a taxi... and refuses to ride the bus here as it is damn near
>> > impossible
>> > during rush hours... well since it was my first conversion i was a
>> > little
>> > aprehinsive (sorry for my spelling) but was still confident and
>> > since we
>> > have been friends for 3 years i was not afraid to use him as a guinnie
>> > pig...
>> > the first motor i ordered took 3 weeks to arrive then did not
>> > function well
>> > at all ... plus they forgot to sent the nuts to mount the thing and
>> > they
>> > turned out to be ASE threads !!! my god - what idiot uses ASE
>> > anymore ?
>> > another week wasted and they sent the nuts but in the mean time i
>> > had gotten
>> > fead up with them and ordered a complete kit from another factory -
>> > LiFePO4
>> > battery and all. - well - -- i am very happy about that . the kit
>> > arrived
>> > in less than a week then it took only several hours to complete the
>> > bike.
>> > when my friend saw the bike he was really amazed and said " it looks
>> > like a
>> > normal bike" . i asked what he expected and he said that he expected
>> > wires
>> > everywhere and expected it to "look" like an electric bike ....
>> > this brings
>> > me to another point that prompted his decition and that is the
>> > elelctric
>> > bikes you can buy and that all the chinese drive look like outdated
>> > mopeds
>> > or little motor scooters for women... we would not be caught dead
>> > riding
>> > something like that.
>> > my original objective was just to test the batteries, but now it
>> > seems i may
>> > be in the e-bike conversion business as others have shown interest
>> > in this
>> > project and are asking about it.
>> > i posted it on the evalbum but i think it is not available to see
>> > yet. the
>> > picture is the guy i built it for (not me!). he is not a big guy but
>> > i hate
>> > to say - as big around as he is tall., i think a little over 200 lbs
>> > - and
>> > he is so happy with the performance - yes it was definatly an ev-
>> > grin and he
>> > cannot say enough good about it.
>> > today i should receive the motor to convert my bike. that should
>> > prove a
>> > little more of a challange since my bike has suspension and i cannot
>> > use the
>> > custom rack from the factory. and - upon his request i had
>> > eleminated the
>> > shifting mechanism from his bike and made it just one gear but i
>> > plan to
>> > retain all the gear system on my bike.. i will definatly post how
>> > that goes.
>> > ..
>> > thanks
>> > Rick
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>> Your EValbum entry is up - www.evalbum.com/3557
>> A couple of points... "I was showing it to a lady - taking turns
>> riding - we ended up far so I rode her on the back ...". Sounds like
>> fun - and I thought China was such a conservative place!
>> Wh/mile sounds way off. You can calculate it by multiplying the volts
>> and amps at the battery for a given speed and dividing that sum by
>> that speed. Eg, say at 10mph the battery volts sag to 32V and the
>> motor is pulling 15A, then the calculation would be 32 x 15 = 480 / 10
>> = 48Wh per mile (or 48Wh/m). Obviously this must be steady-state - ie
>> on a level road with no wind and doing a constant 10mph. You can do
>> it at the wall instead, ie measure the amount of electricity used to
>> charge the bike over a given number of miles and just dived the power
>> used in W by the miles done. This includes the inefficiencies of the
>> charger and battery so will be a bit higher than the first method.
>> What power rating is the wheel motor?
>> Your post is a bit unclear as to whether the kit includes the bike as
>> well - if it does, I think most people would want a kit to convert an
>> existing bike which would reduce shipping cost hugely.
>> The batteries bit on the EValbum page is adrift - it says 12V...
>> Have you actually looked at the cost of exporting a kit to the
>> US ...? or - more interestingly to me - to the UK? Have a look on
>> eBay and see what people are charging for Chinese kits. You may have
>> a good market to EVDL'ers if you can undercut them ON TOP of using the
>> EVDL as a forum to promote your kits - as long as you stick to the
>> EVDL's rules!
>> The link on your EValbum entry to the kit manufacturers web site does
>> not work, BTW.
>> I, for one, would be very interested to hear more.
>> Regards, Martin Winlow
>> Herts, UK
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