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  1. Jonathan in Hiram

    Possible answer for charging ebike batteries from solar?

    I'm not sure I trust a Chinese website enough with my card info to order, I've had bad things happen before. http://www.aliexpress.com/item/MPPT-Boost-Solar-Charge-Controller-step-up-90V20A-charge-all-kinds-battery/1708497647.html?spm=2114.10010108.0.203.SsGOEA
  2. Jonathan in Hiram

    40 kph, 385 kilometers per day on a solar charged ebike

    Evidently the limits of the possible have been shoved a little further up the road. C6Xe9M0VcaI aVLeGrjciRU
  3. Jonathan in Hiram

    4130 tubing question: Why is 5/8 x .035 so relatively cheap?

    I was looking at Aircraft Spruce for some frame materials, after I got over the sticker shock of high grade stuff my frugal nature noted the cheapest 4130 tubing larger or smaller thicker or thinner per foot by around a dollar was 5/8 x .035 wall and it's got me wondering if that's normal, the...
  4. Jonathan in Hiram

    Now at last, an Ebike with a verandah and a sunshade

    I know nothing, nothing, I found it doing obscure image searches and there doesn't seem to be any information available. Tempted I am. http://commutercycling.blogspot.com/2013/05/recumbent-truck.html
  5. Jonathan in Hiram

    Solar Muscle Electric Project - possible goal: Suntrip 2018

    The video of the winner was impressive, I've been trying to decide where to put my solar panel on my recumbent bike, maybe overhead is a better option than I had thought. Thanks for sharing that video, it gave me some ideas. Good luck with your build, do you have motor/batteries and so on...
  6. Jonathan in Hiram

    Bezos beats Musk to reusable space launch rocket

    http://www.theverge.com/2015/11/24/9790510/blue-origin-reusable-rockets-vertical-landing-spacex https://www.blueorigin.com/news/news/blue-origin-makes-historic-rocket-landing 9pillaOxGCo
  7. Jonathan in Hiram

    Bmsbattery S12SN 72V 40A sine controller worth trying?

    After a lot of time fooling around on the ebikes.ca simulator and a lot of time reading here I'll be going to 20s on my 26" rear 2809 9C build soon, I have my 18650 battery build parts ordered and am about to order the cells. I've been dithering for a while over which controller to get, I...
  8. Jonathan in Hiram

    An unusual compact commuter/cargo bike design

    I'm interested in bikes and particularly ebikes as a car replacement and I thought this was cool and different enough to share, seems quite practical for an urban bike. Small and light enough to pick up and carry up stairs, considerable carrying space for a bike while maintaining a tight turning...
  9. Jonathan in Hiram

    Long distance ebike: imagine if these logs were batteries

    :) This is a Maderna Cycle Systems MCS Cruiser with optional under seat luggage rack, I just thought I'd throw it out there as a design possibility for a really long distance ebike. I gather a load in the rack actually improves the ride and stability, that coincides with my own experience...
  10. Jonathan in Hiram

    Maximum Power Point Tracking and solar charging lithium

    So now I have the 100W flexible solar panel and about 1 kwh worth of 18650 cells wired up into two 6s12p pack which I run in series for 12s12p. In the future I'll probably be going to 13s12p and possibly even 14s12p. After doing quite a bit of research into charging from solar panels to...
  11. Jonathan in Hiram

    Reached a personal goal today and I want to thank ES

    Today for the first time in far too many years I saw 199 lbs on the scales. If it wasn't for my ebike making it great fun instead of a scary chore pedaling around my area I really don't think I'd have gotten to this point physically. I feel better than I have in years and at my age that's saying...
  12. Jonathan in Hiram

    Building a battery box, an iterative process.

    Of course it seems that practically everything I do on an ebike is an iterative process but usually not quite as fast as it happened this time. :) I spent my spare time last week building this battery box for my Long Distance Long Wheelbase bent project, got it finished to the point I could...
  13. Jonathan in Hiram

    Atlantic: Do We Look Fat in These Suburbs?

    People in dense cities are thinner and have healthier hearts than people in sprawling subdivisions. New research says the secret is in the patterns of the streets. http://www.theatlantic.com/health/archive/2014/08/blame-the-city/375888/
  14. Jonathan in Hiram

    A friend wants me to build an eCargo bike for him

    I have a Trek 20" mountain bike I got at the flea market and a rear 9C clone I got off Craigslist. I was going to put the 9C on my recumbent but it's not stealthy enough and louder than I care for so the 9C is going to my first "commissioned" build so to speak, which will be my fourth overall...
  15. Jonathan in Hiram

    Reality check?

    I'm building my second semi recumbent ebike with a 26" rear and 20" front wheel. My requirements are a 25 mph cruise on the level, no wind and a 30 mph sprint capability for maybe a mile, my area is hilly but any steepish bits are short and I can't think of any hills more than a mile or so...
  16. Jonathan in Hiram

    Shade tree air cooled, individually fused laptop 18650 pack

    A recent comment of Luke's in a laptop cell thread got me thinking of the possible failure modes of a lot of 18650 cells paralleled and how individual cell fuses could be fitted in a pack assembled from random salvaged laptop cells of unknown provenance and questionable health in order to help...
  17. Jonathan in Hiram

    KV vs winding turns of a 9C clone hub

    I finally got around to measuring the KV of the 9C clone motor I bought off Craigslist a few weeks ago. At 45.5V to the controller it turns about 325 rpm which calculates as a KV of around 7 RPM/V. Playing with the ebikes.ca simulator that is evidently a bit slower than a 2808 which is the...
  18. Jonathan in Hiram

    A Recumbent Grocery Getter

    I've been riding my electrified BikeE "grocery getter" long enough now to wear a Schwalbe Big Apple on the rear all the way down to the Kevlar cords, I figure about 4,000 miles or so (that's why the funky rear tire is on it right now, I have another Big Apple on the way from Amazon). Other than...
  19. Jonathan in Hiram

    Any idea what hub motor this is?

    I have a chance to buy this bike without a battery for a fairly reasonable price, all I really want off it is the hub motor, controller and the throttle for another project I'm working on. I know the rest of the bike is junk, is the motor junk also? The name on the bike is Luche and there is...
  20. Jonathan in Hiram

    60V controller for Bafang geared?

    I have a Bafang SWXH 36V slow wind rear hub in a 20" wheel (~260 rpm no load @39V), right now I'm running it at 11 cells, 44-45V on the original 36V 15A controller. I have enough hill climbing torque for my purposes and terrain but I'd like to go somewhat faster. I would like to go up to 60V...
  21. Jonathan in Hiram

    $400 Recumbent E BikeE

    I paid $300 for this BikeE about five years ago and between me and my grandkids it has gotten quite a beating but mechanically it's still in quite good shape. A few weeks ago I bought a 20" folding electric bike with a 36V 10AH battery and a Bafang SWXJ for $100 off Craigslist, battery still...
  22. Jonathan in Hiram

    Back to back tandem recumbent ebike build

    I've had this frame about 75% put together for a while now, it's made from two inch electrical conduit and some cut apart bikes brazed together. A couple of weeks ago I scored a folding ebike with a 36V Bafang geared rear hub off Craigslist and I've been fitting the motor, electronics, battery...
  23. Jonathan in Hiram

    Frame building tip..

    Been reading a lot about machining lately and found this idea too good not to share here, Spheroids do more frame building than anyone I read on a long term basis and perhaps someone can use it. Use a metal lathe and a hole saw to do precision cuts on tubing with a power feed. Look for a post...
  24. Jonathan in Hiram

    MY motor and a friction drive power Occupy Wall Street..

    Not to get into the politics of it but I thought this was kind of cool, looks like something I would make in a pinch, particularly since I have two MY motors laying around already. :D $8K for 11 bikes sounds pretty reasonable when you include batteries and electronics.. IPXBgZ1gAPs
  25. Jonathan in Hiram

    The Fermi Paradox Resolved: XKCD again..

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