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  1. pdf

    For sale: $200, eZee motor, controller, Cycle Analyst, throttle

    For sale: $200 eZee geared rear hub motor. Real hill climber. 35A controller (56V max.), Anderson powerpoles connection to battery, short twist grip and thumb throttle, nice 26 in. tire included. 135 mm dropout spacing. Cycle Analyst. Will need spoke magnet (similar to this...
  2. pdf

    CNN story of e-cargo bike

    From today's CNN.com http://whatsnext.blogs.cnn.com/2013/09/04/new-electric-bike-can-haul-100-pounds-of-cargo/?hpt=hp_c3 Guy who designed it, Neal Saiki, is said to be founder of Zero. I assume that is true, but not familiar with details of Zero. A couple of quotes: "The cargo bikes on the...
  3. pdf

    Just a thought; cheap(er) way to get a smooth ride?

    I am looking for a smooth ride on rough but paved terrain. My butt is getting tired of the pounding (no jokes, please). I have tried fluffy underinflated tires, padded seats, and suspension posts on hardtails and I've also tried cheap suspension bikes. Not happy with any of them on my route...
  4. pdf

    US source for Halls for 9C

    ebikes.ca has Halls sensors but looking for somewhere more local (shorter shipping) to the US east coast. I have seen "latching" Halls and I assume they are non-latching if not specified and not sure which I need (non-latching I assume but perhaps either would work(?)). Also, the space into...
  5. pdf

    "LiPO", another "be careful" warning...

    NOTE: This is not a condemnation of LiPO; it has some amazing properties and there is a time and place for it. Just a reminder from the real world to be careful. I have been doing some experiments with a "LiPO" (Lithium colbalt I think is the correct name but it is the bricks from HobbyKing I...
  6. pdf

    Jamis Dakar 1.0 XLT rear caliper clearance, hub motor

    Have found a reasonable deal on a Jamis Dakar 1.0 (2005). Just looking at the rear calipers (Hayes HFX-9 hydraulic disc brakes), it looks like clearance could be an issue on a rear hub motor. I measured the distance between the face of the disk mount and the motor casing on a Crystalyte 35...
  7. pdf

    Rough rider NOT wanted

    I have been tinkering with several different frame/motor combinations. My daily rider is a Stoked Xtracycle (Stokemonkey on an Xtracycle). For ride comfort, it is very hard to beat. The greenway I use has a lot of places where tree roots have created pretty bad bumps, short steep ones, but up...
  8. pdf

    Using cell monitor/balancer with LiPO

    All, I have a bike that uses a slow wound 9C and needs an approx. 72v battery. I use three 6s LiPO packs in series. I bought a bulk charger from BMSBattery that charges to about 75v to simplify charging; I just leave the pack in series. I would like to add some balancing and perhaps detection...
  9. pdf

    Shout out to DC Ebikers (esp. dbaker)

    I was in DC last Thursday and Friday at the National Sustainable Design Expo with a group of 5 undergraduate students exhibiting our project on using ebike construction as a way to introduce high school teens to low impact transportation specifically and the impacts of transportation mode...
  10. pdf

    Another busted charger

    Seems I am destined to be repairing chargers for life. I fried a 72v charger and was able to fix it with help here, so here goes again. This is a 36v charger of very similar design to the 72v charger. This one was busted by falling off a shelf. The 36V ouput cable was laying across my rear...
  11. pdf

    US retailers of ebike parts

    I am working with groups of high school and university engineering students who are "building" ebikes by choosing ebike components and assembling the components on an existing bike. The funding is coming through an account at a University and the purchasing agent for our department has very...
  12. pdf

    Charger busted, my fault...

    I posted yesterday with help on arcing during connecting a 75v charger (400W from BMS Battery) to 18s LiPO. Well, I have determined that a situation that greatly enhances arcing is when the connectors are not polarized the same way. The whole story is a bit lengthy, but basically the reason...
  13. pdf

    75v charging, arcing connections

    I recently purchased a 75V charger for bulk charging 18s LiPO. When connecting the DC output from the charger to the batteries, I got a significant arc and now the contacts in the connector are sufficiently damaged so that they have to be replaced. Is there any order in which I can connect...
  14. pdf

    clacking noise from hub motor mounted as mid-drive

    All, I have a hub motor mounted as a mid-drive, to a left-side crank (Stokemonkey). I was tightening the chain from the motor to the left chainring yesterday and after tightening, noticed the cap-head screws that hold the motor cover on were hitting the frame when I tested it. This was with...
  15. pdf

    Clacking spokes, hub motor

    I have a hub motor I bought laced into a 26 in rim. The spokes are a size or so larger than most typical bike spokes; I could measure them if that would help. The motor is a 9C, so fairly large diameter. The rim is double-walled. Because the motor is a large diameter and the spokes are...
  16. pdf

    Capacity of new Turnigy LiPO

    I have three 6s 5 Ah Turnigy packs. I have not used them much, maybe have around 200 miles on them, with charges every 8 miles (avg). I used my balance charger on one brick for the first time to do a 0.3 amp discharge to 18v and got about 4.5 Ah. Does anyone have a value for new LiPO to which...
  17. pdf

    Xtracycle introduces $700 cargo bike

    See: http://www.xtracycle.com/cargo-bicycles/xtracycle-compatible-bicycles/sun-atlas-cargo.html Doesn't include panniers.
  18. pdf

    Ran stop sign. What would you do?

    I have thought of myself as a pretty conservative bike rider; I never run a red light (well, sometimes a "Pasadena Pause" in a right-on-red situatoin, but only if there are no cars or cameras ;-) at the light), signal turns, etc. However, I do frequently run two stop signs coming out of my...
  19. pdf

    Narrow drop-out rear hub motors

    Anyone know of a rear hub motor for a narrow drop-out rear? I have a cruiser with a drop-out spacing of around 124 mm. Want to convert to a single-speed rear hub. I think ebikes.ca used to sell a rear hub motor with a narrow dropout spacing, but I don't think they do anymore.
  20. pdf

    gyroscopic stability in electric motorcycle

    Saw this on CNN.com and later found its own website: http://money.cnn.com/video/technology/2011/10/11/ts_giro_car.cnnmoney/ http://litmotors.com/news/ It is a fully enclosed motorcycle with gyroscopic stability. Seems like a good idea. The concept illustrated with an animation in the first...
  21. pdf

    Series vs parallel charging

    I put together an ebike for my son. He rides it maybe twice a week. Right now I am taking the pack off the bike and reconfiguring it as parallel to charge; the pack is 3 5 Ahr 6s LiPO batteries in series on the bike, parallel to charge. I am using an RC charger that takes a long time but...
  22. pdf

    Quick summary of petroleum industry's energy outlook 2030

    Went to a seminar recently given by a chief scientist at a major petroleum company (names not given to protect the guilty). The topic was biofuels/alternative energy and their position in the company's energy outlook and planning. As a quick summary, I am listing below THEIR take on the energy...
  23. pdf

    Battery drained while sitting?

    I recently put together a bike that uses three 5 amp-hr 6s LiPO batteries in series that feed Lyen's 18 FET controller. I have a DP CA on this set up. The controller has a wire that requires battery voltage to turn on the controller. I wired that to an ON-OFF switch that was on the 9C...
  24. pdf

    Vote for student e-vehicle project (cross-posting)

    OK, I need your help. Go to: http://planetforward.org/idea/​tennessee-students-engineer-ec​o-vehicle-that-drives-for-penn​ies/ and click on the "thumbs up" symbol. Please feel free to repost, re-tweet, re-blog, or re-whatever. If the students generate enough interest, they could be...
  25. pdf

    Battery, controller for 9c 6x10

    I have been using a Stokemonkey for some time. I recently bought a 9c 6x10 as an experiment to mess around with hub motors (my first hub motor) and build a good hill-flattening-system for my son. The use will be for climbing moderate grades (5-7%) for a half mile or so, and some steep grades...
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