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  1. C

    Helmetcam of jury rig test bike in horse country

    For my first couple years living in Bedford I thought the small offshoot trail WAS the minuteman, goes well past the Billerica border and runs roughly parallel to Route 4. It crosses the road many times giving ample opportunity to get on and off. The Minuteman itself ends in Bedford next to a...
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    How do I embed a Youtube video?

    Because I couldn't find a thread that very clearly explained it: 1: put in by clicking on where it says youtube on the top bar. 2: Take youtube url, say http://www.youtube.com/watch?v=47lwPE_xGik 3: Delete the = sign and everything left of it 4: In this case now you should have 47lwPE_xGik...
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    Helmetcam of jury rig test bike in horse country

    Had mistakenly posted a testing report in photo & video, sorry started a post with video and got sidetracked. Here is a helmetcam video of a ride. 47lwPE_xGik The bike is the same one detailed in the report found here http://endless-sphere.com/forums/viewtopic.php?f=4&t=46545 edited to fix...
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    Test of high performance jury rig-impressive results.

    My test ebike has gone thru three major iterations. It serves as a test bed and as my means of transportation. Take 3: The Bike Frame: Chinese rigid diamond frame steel mountain bike, no front shocks, cheap rim brakes, freebee, relative got it at a yardsale and didn't want it so gave it to me...
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    Refurbished "SLA" with a special surprise inside

    The ebike batteries being of the type was a false alarm. It turns out the higher than normal voltage on my bike batteries was an measurement error caused by a the cheap voltmeter built into the battery charger. It indicates 13 volts for each block fully charged, which is very close to an...
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    Refurbished "SLA" with a special surprise inside

    "If your charger pulls it to 16.8v" It does not. It charges to a little over 14 volts and AFTER removing it from the charger it then climbs from 14 volts off the charger to a final open circuit voltage of 16.8 over a few hours. under a 30 amp load it drops to 16.2 volts I bought the original...
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    Refurbished "SLA" with a special surprise inside

    6 or 7 mph with 4 people aboard, 10 mph with just me. Old Town stillwater 17 fiberglass canoe. with just me in at full speed more than half the boat is out of the water and the bottom oilcans with every ripple. When I go in the front to level it: wow. At throttle 3 or 4 out of 5 depending on...
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    Refurbished "SLA" with a special surprise inside

    Oddly enough a very wonderful suprise inside. They ain't lead acid! No, as far as I can figure these are AlMg/neutral/Fe2O3. My first was a Deka group 24 I got for my trolling motor. I had modded the motor to the point that it would plane my uncle's stillwater 17 with 4 people on board. The...
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    What actually happened to nickel zinc

    First of all there a lot of things being called nickle zinc. Most can be broken into 3 categories: gen 1: these have conventional separators, normal (slightly impure) zinc, and have a cycle life from 25 to 50 for conventional separators to 100 cycles for plate pocket. most older batteries are...
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    Strange ignored chemistry: Al-Fe2O3

    No, europositron promised but intentionally did not deliver a 1.5 volt per cell aluminum-air battery with some sort of proprietary aqueous amide electrolyte and a long life high rate bifunctional air cathode. The best story i have been able to obtain is that Partanen took over $2,000,000 usd...
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    Strange ignored chemistry: Al-Fe2O3

    anyone ever heard of these things before, I met someone who says a former UMass Lowell professor was very knowledgeable about them but the university no longer had contact info for him. I dimly recall seeing one of these being sold off the shelf somewhere in Virginia when I was a kid in the...
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    advice on new controller needed, bmc V1 review

    I am going to call grin cyclery and see what they have to say about issues with the Bmc and their controllers; the modded infineons, and the sensorless crystalytes which they claim will work with a motor that normally uses hall sensors. The website mentions that the infineons have the same...
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    advice on new controller needed, bmc V1 review

    Found someone selling the newest sensorless crystalyte controllers, very expensive but would they be a better match? It's just they want $200 for the 40 amp 36 or 48 volt unit. They replaced the mosfets; the new mosfets are continuous, not peak rated at 100 volts and 100 amps PER EACH...
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    advice on new controller needed, bmc V1 review

    Does Cell_Man have a web site and what controller of his should I buy, and what does he charge?
  15. C

    advice on new controller needed, bmc V1 review

    I confess to murdering a cheapo controller. It was a 36 volt 25 amp controller, I was and am running a 36 volt bank of monster 26 amp hour semi deep cycle powersonic AGM batts. There is a plug you can pull to improve hill performance or run at over 20 mph, on the cheap controller I suspect...
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    advice on new controller needed, bmc V1 review

    I have a diy setup running a BMC V1 "puma" 400 watt rear geared hub on a comfort cruiser frame, and powered by 36 volt 26 amp hour SLA battery bank. I have not weighed the bike but it is very heavy for an aluminum frame. I weigh over 90kg and the batteries weigh 26 kg in total. I ordered the...
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    A class naming scheme for ebikes similar to other vehicles.

    Among 4 wheel gas or diesel vehicles there are Suv's,vans, station wagons, pickups etc. I think there should be a well defined class naming system for ebikes. There should be a quick one or two word way to establish the difference between a 250 watt pedelec and a 1200 watt moped. I also...
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    The 12 volt bike to end all 12 volt bikes

    Now thinking out loud without thinking about money or difficulty: What about a 100s 2p bank of nimh 16ah Safts Back to reality: They cost nearly $30 per cell, would be even heavier than the earlier proposed lead bank, it would need a large, complex and expensive bms, and balancing would be an...
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    The 12 volt bike to end all 12 volt bikes

    Took another look at the windings, gave up on the 12v idea, they might as well have used music wire for it. I'd prolly have to run 120 volts to get real speed out of it (which I'm not ruling out yet)
  20. C

    The 12 volt bike to end all 12 volt bikes

    I already own an ebike with 25 kg (57 lb) of powersonic lead acid batts and it is perfectly fine except for being slow up hills that being due mostly to a 400 watt motor and a cheap controller. On flats I can make over 20 mph. It corners better than my (since stolen) 4 stroke scooter despite...
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    The 12 volt bike to end all 12 volt bikes

    Re: everyone who said "lead acid doesn't like to pull big amps; put more in series" lead acid doesn't like high C rates. the group 31 is a very large battery, an equivalent (equal nominal watt hours) 120 volt pack would consist of a 10s pack of 12v 10ah batteries. pulling 2000 watts from a 12...
  22. C

    The 12 volt bike to end all 12 volt bikes

    Thank you dogman. If I had enough money and the folks at EVionyx would get off their duffs and give us what they promised us by 2007 I would be using a 60 volt 80 ah electrically rechargeable zn air bank that weighed under 30 kg. :x i cant afford a 72 volt lipo The real purpose of the...
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    The 12 volt bike to end all 12 volt bikes

    I have a giant 12 volt battery at hand, an alternator to convert, a lathe to make the rotor and other components, too much spare time, a desire to build somethng unusual, and a desire to go fast, and cant justify the cost of a new high voltage battery. the local stores have good prices on 4...
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    The 12 volt bike to end all 12 volt bikes

    I am contemplating building a low voltage lead acid bike that will be capable of running with the petrol bikes on the blue star/vfw highway (speed limit 65 kilometers per hour, regularly ignored by cars) It will consist of a mountain bike frame, wide medium pressure comfort cruiser tyres and a...
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    What happened to EVionyx? Where can i buy?

    Interesting find, my worst fear is that they were a mostly legally legit business pulling a Chevron/Cobaysys, but the company is not owned by a large fossil fuel business so they would have no reason to do so. The zincate spinel anode patents have long expired (in the USA patents last for 5...
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