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  1. K

    Fat tyres & springy suspension sap energy & speed

    coop: please reminde me in 2 days, iam than at home again and can measure the tires.. i have meanwhile also big-apple at the rear, look here: http://www.kraeuterbutter.at/Bilder2/Modellbau_Anhaenger/Flugplatz_Bike_Anhaenger_ohne_Reini_DSCF2758.jpg i mounted the wheel, then i put 4-5bar...
  2. K

    Lithium-ion Battery Life

    if you build your batterys by yourself: invest a little more money and go the Fepo4-line.. 1000cycles should be realy no problem (i bet you get lot more in an e-bike with them) after 3 years when you need a new LiIon the A123 have paid there initial higher costs
  3. K

    Lithium-ion Battery Life

    yes, for a daily commuter it may be different for somebody who rides his bikes on weekend, maybe 2,3 or 4 charges and then let the bike rest during the week it maybe be different longtime-storage: for me using the bike/battery every or every second weekend is not much difference to...
  4. K

    Fat tyres & springy suspension sap energy & speed

    iam in the moment cycling a lot with 3 bikes.. my electric bike (2 big-apple 26"x2,35", no suspension, stell-frame, 19kg without batteries) another mountainbike (mountainbike-tires but with a ring int he mittle so you can go very good onroad as well), steelframe, front spring suspension...
  5. K

    Lithium-ion Battery Life

    hmm.. i would not realy agree with that from what i have learned so far yes, you should not run them down too much all time.. but keeping them on a very high charge-level all time is also not good.. Welcome to Battery University so: when you for example drive only once a week with...
  6. K

    mounting a hub-motor, torque-arm, .. man thats hard work

    hey.. for average speed: today i was - first time - with my trailer and RC-plane at the flying field.. 14km in one direction + 14km back home + 6km done by 3 people who realy wanted to test the electric bike (and all were very euphoric after a testrun) so: not that far, i was able to spend...
  7. K

    mounting a hub-motor, torque-arm, .. man thats hard work

    no.. i don´t recharge them at work.. so ~60km from ~7Ah and 36V (43V) as said, i use the motor only up-hill.. when i need about 2 hourse for the trip, i have 30min of full-throttle motorpower (14A motor-current limit, 7Ah battery-capacity = 30min) so 3/4 of time is my leg-power alone and 1/4...
  8. K

    mounting a hub-motor, torque-arm, .. man thats hard work

    little update: using the bike for 2 weeks daily now.. last week: done 360km with ~3600meters of hight when going to work each day (~60km with 600hm) meanwhile running with 36V-43V and 7Ah in sum (using 3 batteries, 1 Lithium polymere (made from 3 rc-lipolies of different brands...
  9. K

    Marathon Plus Tyres for Torq

    have you considered the Schalbe Big Apple tires as well ? iam very pleased with my 26" 60er tire (for now only at front wheel, but already bought one for rear as well, just wait for the new rim to arrive to mount it) i first drove it with 4bar with 4bar it seems still softer than thiner...
  10. K

    how efficient are controllers (brushless, at reduced throttle?)

    how efficienct are they ? for example: going with 15km/h does need less energy for same distance than going with 25km/h because of the airdrag.. so: let say at 25km/h controller runs "full throttle" at 15km/h is has to reduce throttle (and for that you hear it "iiiiiiihhhhh") will...
  11. K

    Electric Bike Videos

    my converted old mountainbike with BAFANG motor 14A controller-limit and two packs of A123 Fepo4 (2.3Ah) from my RC-helicopter (connected in series for 13s1p = 42.9V nominal) YouTube - mein Elektrobike mit 13s1p Fepo4 2300mah the hill in the video is about 20%
  12. K

    mounting a hub-motor, torque-arm, .. man thats hard work

    yes, its for sure not "good" for the cell ;) but its normal treatment in rc-hobby-world.. we are used to the fact that batteries last between 50-150cycles. here a test of this very same cell in labor:         Elektromodellflug - Thunder Power - LiPos im Test as said: out-of-date...
  13. K

    mounting a hub-motor, torque-arm, .. man thats hard work

    as i said, an interesting finding was: on (steep) hills, more power with 14,8Volt or 18Volt batteries, than with the 42V Battery and the bike-controller (with current limit) often you hear people: "i have hills, so i need 36V instead of 24V or 48V instead of 24V) for that bafang-motor i...
  14. K

    mounting a hub-motor, torque-arm, .. man thats hard work

    hey, i also tried this little battery from an rc-plane: yes, realy small (halfe the size of cigarettes) the yellow color is wood, i surrounded the battery with that for protection against penetration it weights only 76g !! 11,1Volt and 1350mah here what i measured: not bad, isn´t it ? the...
  15. K

    mounting a hub-motor, torque-arm, .. man thats hard work

    so.. meanwhile we have a German Pedelec-forum as well, so i was most time there.. little update: its working !!! here a first little video: YouTube - mein Elektrobike mit 13s1p Fepo4 2300mah the hill in the middle of the video is 20% on the left side of that hill it is 30%, its the one i...
  16. K

    Drive Through Gears on E-bikes

    Flyer F-Series: pro: most quiet (no gears in the motor, no additional chain,... quieter than the panasonic-drive) con: heavy, not as efficience as the newer panasonic-drive more pics: Google-Ergebnis für...
  17. K

    cheap Fepo4-cells

    what kind of cheap Fepo4-cells are there ? i use A123 Fepo4 2300mah-cells and love them very much... are there (i heard so) bigger Fepo4-cells.. cheaper (and for that with less power-rating) but also long-lasting (high cycle-counts, high calender-life) thx..
  18. K

    mounting a hub-motor, torque-arm, .. man thats hard work

    when i was on the RC-flying field and Jochen was giving the parts to me, my buddies said, that the parts will be the most luxurious/precious part by far on the whole bike.. (iam well known for fixing every problem normally with adhesive tape... thats also how most of my rc-planes look...
  19. K

    mounting a hub-motor, torque-arm, .. man thats hard work

    oh... and meanwhile i have also done some of the wiring.. i will do all the wiring inside the frame: thats how i make it: first step is done by an hoover (vacuum cleaner) the rest i think is self-explanatory from the pictures