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  1. Dave Sloan

    36v vs. 48v Range Question.

    I know that when I bought my hub motor that they were all rated at 36v 500w = at least that what was stamped on the outside. Most of the people that bought these ran 56v or better batteries. These hubs all came with stainless steel spokes so that you could probably do 3500w which you may need if...
  2. Dave Sloan

    My theory of how to max-out the lifecycle of Li-Ion batteries

    It is quite interesting what you are saying. I have read a lot on extending the life of lipo and lifepo4 batteries. I bought a drone about two years ago and the lipo batteries just do not last if they get too hot. My take on them is to make sure that they cool off before recharging and charge...
  3. Dave Sloan

    Problem hub motor/battery cuts out under heavy load

    To balance the battery you require a low amp charger. To achieve this add a load using a light bulb or resistor that slows the charging rate down. Most bms load up the cells that are close to charged giving the other cells a chance to catch up. If a charger with greater then 1.5 amps is used the...
  4. Dave Sloan

    regen on electric bikes

    With a new DD motor on a bike it appears that there is resistance. This is probably not due to the brake regen but that the bearings are still tight. After about 1500 miles on my bike I noticed less resistance when coasting. My controller was programmed for regen when I first got the bike and I...
  5. Dave Sloan

    Battery Charging

    I tested the five different charger that I have and there is not enough current going back into the charger to run a cell phone = when the battery is plugged in first. My largest charger is 5 amps - so I can only assume these are high current - cheaply built chargers. Most of my chargers are...
  6. Dave Sloan

    Advise on setup 30m@30mph

    I have been riding a bike like this for five years now. It is a Trek 820 with a 48v 20a lifepo4 battery measuring 13x5.5x5.5 inches. I have done an average of 30 mi at 30 mph many times. In hilly areas this usually means speeds between 23 and 45 mph. At these speeds though you had better have...
  7. Dave Sloan

    hub motors, effeciency & longevity

    I would suggest that you get an infrared heat gun. You can get them on sale for about 30 bucks. They will tell you where the problem is/isnt. Sounds like a bearing problem - but which one? I know that after about 500 miles on my bike the wheel had less resistance/heat. The tires could be the...
  8. Dave Sloan

    Any suggestions for a better setup?

    Go for the NEW Trek as Dogman suggests especially if you are going for a front wheel as the 820 has the right suspension for the DD hub. For climbing hills a 20ah is minimum in lifepo4 but a 15ah a123 (only) might suffice. I use a 30 amp controller and it is plenty strong enough = 1800w peaks...
  9. Dave Sloan

    HATE MY BATTERY!!

    I have two 48v 20ah VPower batteries. One is five years old and the other four. The BMS on one blew last spring. It was my fault for not having a precharge resistor. I got a new different BMS from Cellman and it works great. To top up a charge with a three amp charger - wait until the red light...
  10. Dave Sloan

    Merry Christmas and a Happy New Year to EVERYONE at E.S. !!!!!

    Merry Christmas to everyone - especially Justin - since we would not have this thread if it was not for the early Christmas present. And Happy Holiday to everyone else. Best in the New Year and looking forward to going to the RGV now that I am finally retired and extending my Electric Biking...
  11. Dave Sloan

    what type of throttle do you prefer

    A high end throttle is NOT one that when your 30 something daughter wants to try your ebike and gets so scared from the unexpected speed that she breaks the grip off in her hand and the bike surges forward at full tilt until Dad meets her around the bend and pulls the battery connectors off to...
  12. Dave Sloan

    what type of throttle do you prefer

    Looks like everyone started from motor bikes including myself. The first control that I used on an ebike was a half grip. It worked OK for short rides but was not as comfortable as (I thought a full grip). After building a bike from scratch I first started with a full grip which worked quite...
  13. Dave Sloan

    Sick of manipulated dealer specs!

    Reminds me of when I used to buy GM cars because they advertised such great mileage. When my GM burnt up due to a faulty heater cord sensor I bought my first Ford. I was not looking for the mile maker at the time but it came with a display showing number of miles left and miles per gallon. After...
  14. Dave Sloan

    Electric Motor faster when cold?

    Probably it is because the air is less drag = thinner. As far as cooling goes - there is not much difference - less air to take the heat away.
  15. Dave Sloan

    Big mistake, HUGE!

    I use a front wheel drive on two of my bikes that I use for trail riding. I think that the biggest missing component is the suspension which is needed front or rear - there is only so much you can do with a tire. I have never been a fan of too much suspension on the powered wheel as this can...
  16. Dave Sloan

    Which bicycle can comfortably and confidently handle 35mph?

    I would still go with a Trek steel frame. Just make sure it has double rims and short front suspension for front wheel drive. Use two plus inch tires that can handle high pressure. It is balanced when you can take your hands off of the handle bars and go at least 100 yards at 20 MPH without...
  17. Dave Sloan

    Altona woman dead after electric bicycle collides with truck

    http://www.winnipegfreepress.com/local/breakingnews/Altona-woman-dead-after-electric-bicycle-collides-with-dump-truck-131020178.html Keep it safe out there!Sad news to hear about this happening to somebody so young.
  18. Dave Sloan

    Resistance of e-bikekit.com direct drive hub motor

    The 9C when you first buy it has a fair amount of resistance when new because the bearings are tight. After 500 km or so it will lossen up enough that you can ride it with very little resistance. You would be better off getting a front hub because it is easier to switch out a front wheel if you...
  19. Dave Sloan

    184v 45s lipo short circuit!!! POST YOUR KFF HERE!!!

    Once your hands are better - drop by and get a bunch of Andersons from me - I have a bag full of them = hope your hands are better soon.
  20. Dave Sloan

    Punctured tire prevention?

    I thought that puncture proof tubes were the answer until I had a flat this summer. Seems the glass worked its way thru the (at least) 1 cm (half an inch) and blew the air out. I was luck because the guy that drove me home said that he would bet it was glass as he had the same problem. His...
  21. Dave Sloan

    LiFePO4 help

    The plug coming out of the BMS and into the battery may not be on your model but it is a large white plug with the flat connectors running 90 degrees to each other. It was the crimping inside the plug that was at fault.
  22. Dave Sloan

    Pikes Peak, Electric Mountain Climbers...

    Great story - Reminds me of the saying that goes - Doesn't matter whether you win or loose - matters that you played the game! Too bad for all the flats - I thought I had it licked this summer with kevlar and puncture proof tires = the glass still got thru! Finally got a decent tread and carry a...
  23. Dave Sloan

    Flywheel bicycle video

    Problem with a flywheel is the energy per weight - If this 22 lb. flywheel could spin at higher speeds and you were just going in a straight line then this would be fine. Problem is that the flywheel cannot rotate and the gyro effect keeps from turning the bike effectively. I'll stick with my...
  24. Dave Sloan

    LiFePO4 help

    From my experience the first thing to check is the connector going from the BMS into the battery. I have had to re-crimp these on both of my batteries = This caused the identical problem that you are having - they depend more on the shrink wrap then the crimping to hold the leads. While you are...
  25. Dave Sloan

    Nuke Proof KMX?

    Do not have a picture of a kmx - The one that I know of is the Greenspeed SLR with a heavy duty chain keeper drilled and tapped to mount a skid plate. Look at the last 2 pictures that show the aluminum skid plate. http://gallery.me.com/michaelbillesbach#100176
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