Search results

i have the opportunity to maybe get a used sram sparc for few money.. question: how does it work ? it is said to have 2 motors with belt-drive inside the internal gear hub.. what motors ? brushed or brushless ? how are they rated.. i have read, that it is not a strong drive-train, more on the...

ad 1) not neccessaraley.. you can make a Fepo4-pack with 6,9Ah with lot less than 4,5kg as well and still more power ad 2) what do you mean by that ? ad 3) yes, for sure ad 4) depends on how many cells you combine ad 5) the battery will not function as a natural limit like...

@John in stocky: well: your 4.5kg battery replaced by A123 would mean: 8 A123 Fepo in series (would result in ~27Volt noload and 24Volt under load-voltage) and the cells paralleled 7times.. the cells will weight then 3,9kg (+ 600g casing we are at 4,5kg) so: better voltage than your...

i see your arguments.. i read in this forum two things: 1.) Lipos do not have the power of NiMh.. with a NimH/Nicd you have more power at 30-40A load in your bike 2.) lipos are dying very fast This two statements made me to jump into the forum. i have not much experiences with...

YouTube - Lightest electric bike in the world e bike made from rc-components.. just a tech-demonstration... klick on the link in his description for the details.. very very light setup

and a example from the real world: bike with A123 Gary Goodrum (Ggoodrum) from www tppacks com (he normaly sells thunderpower lipoly-batteries) has done a e-bike conversion with A123-Fepo4-round cells.. he uses 16s6p A123 Fepo4 Pack for his e-bike the cells weight 6816gramm capacity: 13.8Ah...

some updates for the A123 Fepo4-cells.. (mine are running still great, power as on first day) here a guy makes some cycle-tests with the cells.. test one: A123: long term (after 1,000 CYCLES done, 2nd cell over 500 cycles at higher A) - RC Groups 1050 cycles done (after 400cycles 6%...

but the bear !! the bear would not be cool anymore.. so -> lithium XX batts int he fridge is no good idea ! ;) i wonder about your calculation: thats REALY heavy.. are there charger-electronics, balancing-curcuits, etc. included ? as said, my cells will give this: 37Volt (= 42Volt after...

hmm.. iam realy wondering why they (the bike-companies) had such bad experiences with Lipo wereas i had that great success with that cells.. it has made a revolution in my hobby, allowing things which were absolut unthinkable 5 years ago...

is there any bike using light Lithium Polymere cells ? i see and read always about Lithium Ion (Mangan) ?!? how much capacity are you wanting, and how much weight should such a pack not exceed ? (the costs not considered at this moment, just interest from technical stand-point) for...

yes... on the bike-elektro-antrieb.ch E-Mountainbike elektrovelo e-bike Elektrofahrrad, Tante Paula Roller, Phat Flyer, Elektro Roller, Electroscooter, E-Scooter, Elektrotrotinet, Electric - bike they have solved it also that way.. look at the version LANZ V4 (freeride) with Freilaufkurbel...

wow... thx.. thats a real cheap price as well !! seems to be ideal for experimenting.. i have here an old mountain-bike http://www.kraeuterbutter.at/Bilder2/sonstiges/Mountainbike/Bilderuebersicht1.jpg (more detaild pics here: Index of /Bilder2/sonstiges/Mountainbike ) its a...

.. yes.. we heard that all for the other cells too.. but for that there are the realworld-testings.. i know there are NiMh which REALY sux, and there are also great once.. you also can´t say Nimh is Nimh... that also another factor ! for the "cheapest bike" i refer here to bikes...

here some more information for the A123 M1 FePo4-cells (we are using now for some month in rc-sports) (specially dedicated to the big scepticer flecc ;) ) we have the diagramms, we have the data provided by A123-Systems but - as flecc stated - datas from a manufactor are always very...

yes... said to has very good hill-climbe-abilities on the other hand 78km/h have been done at flat with that bike !

hmm... i like it from concept. looks very rugged also mounting on a road-bike is possible assistance up to 55km/h possible hmm... considering a light moutainbike with 9-10kg the motor/gear-unit including mouting material: 2,5kg the controller-unit + handels: 1kg the batteries (Lipo...

wow.. thanx for the links... as i see, its - unlike other versions, like this: this of the swizzbee works with different rpms which were added... on the two pics here: when the motor spins the pedal-shaft with 60rpm, i have to pedal as well with 60rpm and more to add power for the...

yes ! thx.. that the bike i meant.. very nice style.. the only downside is maybe, that you can´t take the battery with you (which is included in the frame) to your flat for charging... what i don´t get realy: how is the power-system (motor) working in this bike ?!? it seems so small...

i found once a link to a electro-bike (very expensive) it was powered by NiMh, batts included into the frame it was red ;) power: i think 3 versions, 250Watt, 400Watt and 600Watt it had no hub-motor and for an untrained person not noticable, that it was an e-bike.. i can´t finde...

you have to excuse, my english is not that good.. "top of the stack" -- what does that mean ? (for example) ;) :D such language-problems can result in some miss-understanding (from my side at reading, from your side when reading my confus written text ;) )