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  1. Jonathan in Hiram

    Building a compact cargo bike

    Dan, you might be interested in how I made a swingarm pivot out of two old bike steering tubes and head bearings. The pinch clamps are made from tubing and 1/4-20 coupling nuts for threaded rod, they will be brazed to the frame when I get the rest of it made. I'm way too focused to take pictures...
  2. Jonathan in Hiram

    Building a compact cargo bike

    I get the impression the OP is designing around parts he already has, has the front shocks but no suspension fork, he might already have the front motor. Tubing is pretty cheap, building the fork if you already have the shocks would be cheaper than buying. Thanks to fairly severe financial...
  3. Jonathan in Hiram

    Building a compact cargo bike

    Long with a lot of trail and not too much steering axis inclination will make it stable which is a good thing for a cargo bike particularly when you are loaded. What I've noticed playing around with different bikes and motorcycles over the years is that the inclination of the steering axis...
  4. Jonathan in Hiram

    Need Patent for start production

    Re: Work that is beneficial to all living beings.. Of all things Twain's War Prayer pops into my head.. I'm not going to post the whole thing because it's not relevant and actually kind of disturbing, particularly in view of recent history, Twain was one of the most powerful writers in the...
  5. Jonathan in Hiram

    Need Patent for start production

    I suspect almost any patent that isn't defended with even more money can be busted by enough money.
  6. Jonathan in Hiram

    Need Patent for start production

    My favorite rant on patents... I used to subscribe to Midnight Engineering and this was an article in that fairly short lived mag from the late 80's early 90's TL;DR: Patents are an enormous time and money sink for the individual that are about as likely to pay off as playing the lottery with...
  7. Jonathan in Hiram

    Building a compact cargo bike

    The cargo rack is a little higher than it strictly needs to be, lower would be a bit better. With that high top tube getting on and off with the rack loaded where you can't swing your leg over it is going to be a bit awkward depending on how old/agile you are. A mixte type of frame in the...
  8. Jonathan in Hiram

    E-Trike Project

    If you use 33 or 34 gauge (skinny) copper wire to solder to the individual cells from a bus bar they can act like fuses at around 4-6A per cell. It's also so thin it's really vibration resistant since it bends so easily and allows the cells to move a bit without breaking the connection. I...
  9. Jonathan in Hiram

    Ebikers Book Shelf

    If you are going to be a serious ebike tinkerer you need a basic understanding of electricity and electronics. I probably learned more practical electronics from the ARRL handbook than any single place, today the internet replaces it to some extent but it's generally some of the clearest and...
  10. Jonathan in Hiram

    E-Trike Project

    I sit corrected.. :mrgreen: Yeah, high resistance cells and cells that leak down significantly should be eliminated before you start capacity matching if you want to save time.. Good to know about the new charger, that's quite a useful upgrade to the old capability. Charge them all up...
  11. Jonathan in Hiram

    E-Trike Project

    The B6 is going to be ~very~ slow discharging your cells, they do discharge but it is limited to just five watts total. If you have five cells in series for about 20V then you can discharge at 5w/20v or 0.25A which will take roughly ten hours to discharge the 5 cell pack. An 18650 cell holds...
  12. Jonathan in Hiram

    MUSIC thread

    Best performance I have seen in a while, Samantha Fish covers Screamin Jay Hawkins' I Put A Spell On You... A lot of pickers play the blues, Samantha feels them. GL9rBAjut2g
  13. Jonathan in Hiram

    DIY rotary tool from an inrunner

    I'm using a heli brushless on a high speed spindle I made for milling wood on my DIY CNC mini mill.. Works fantastic, I've made hundreds of pounds of sawdust with it.
  14. Jonathan in Hiram

    Bike Racer - Motorpacing eBike Build - Feedback? (Q100@48v)

    Freewheeling is already built into the motor, controller has nothing to do with it, EABS or not. Since the motor freewheels the EABS won't do anything but suddenly stop the motor when engaged, you won't even notice it most likely, at most you'll feel a slight jolt as the motor rapidly brakes...
  15. Jonathan in Hiram

    Bike Racer - Motorpacing eBike Build - Feedback? (Q100@48v)

    Cruise is going to be tricky because you want to simulate being in a pack and the effect of drafting is going to vary with speed, normal ebike cruise is almost going to be the inverse of what I suspect you need, less help at lower speed and more help at higher where drag would be greater out of...
  16. Jonathan in Hiram

    Bike Racer - Motorpacing eBike Build - Feedback? (Q100@48v)

    I was going by the numbers the OP quoted for wattage and then doubling the difference for what he thought he needed, 270 for in the peleton and 350 or so for the solo rider at 28 mph. He's going to be in a full tuck with all the roadie aero bells and whistles. So he was talking 70 watts...
  17. Jonathan in Hiram

    Amazon Prime Now (E-Bike Opportunity?)

    I know just the bike for giving the taxi rides... :mrgreen: Comfortable reclining position and a great view of something other than the driver's fundament for the passenger, small wheels for good efficiency and thrust with a DD hubbie and it even has a luggage rack.
  18. Jonathan in Hiram

    E-Trike Project

    Lengthy thread on the two speed hub here.. https://endless-sphere.com/forums/viewtopic.php?f=3&t=58490
  19. Jonathan in Hiram

    Looking for a new bike from scratch.. thinking enduro china

    I've stripped down a couple of factory ebikes for the electric drive pieces, it worked well for me. If you label and bag everything carefully you can always put the Prodeco back together if/when you upgrade to more motor on the new bike.
  20. Jonathan in Hiram

    E-Trike Project

    15 mph or a bit slower is about average on group rides so you are definitely on the faster end of that but quite a long way off the roadies. How fast are you going in the sand slogging and how fast do you want to go in those conditions? That's by far the most difficult part of what you want...
  21. Jonathan in Hiram

    Bike Racer - Motorpacing eBike Build - Feedback? (Q100@48v)

    This isn't your typical ebike rider, the OP is going to be using a couple of hundred watts max at high speeds to merely assist already vigorous pedaling so the standard rules about amp hours and miles aren't going to apply (unless he gets lazy and stops pedaling of course). A relatively small...
  22. Jonathan in Hiram

    Bike ergonomics-different for ebikes?

    There's really two main problems with pedaling with the knees significantly bent, most of can't put out near the power versus a straighter leg pedaling and pedaling hard with knees bent can cause knee damage or exacerbate existing damage. If someone isn't going to pedal much then there's no...
  23. Jonathan in Hiram

    Even buying tires has to be an adventure now, eh?

    Back when I was still driving I'd been buying used tires for a long time, the last half of the tread squirms less and wears less quickly then the first half. Get a good relationship with someone who deals with used tires and they'll find the nicer stuff for you and you'll pay pennies on the...
  24. Jonathan in Hiram

    Dual hubmotor powered trailer build

    I have one of these now mounted on my kid trailer that has the canvas stripped off and a couple of added rails for support, cheap, lightweight, strong, very nearly waterproof even in driving rain (found a small dribble inside after recent days of deluge) and they are designed to be stacked on...
  25. Jonathan in Hiram

    Possible answer for charging ebike batteries from solar?

    Hi titooon2014, I just got one of these in the mail and I've been playing with it for a couple of days now.. I feel fairly confident this unit will charge seven serial lithium ion cells from two "12V" solar panels (in reality more like 17V each mpp) and it is an actual mpp controller but it...
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