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Electrobecane
- Author: mike (---.cpe.net.cable.roger)
- Verified User: northernmike
- Date Posted: 06-28-09 19:28
Witness:
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Re: Electrobecane
- Author: Mars (---.hsd1.ma.comcast.net)
- Verified User: martian
- Date Posted: 06-28-09 19:32
Nice Job! Etek?
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Re: Electrobecane
- Author: Saabsonettguy (---.cable.mindspring.com)
- Verified User: saabsonettguy
- Date Posted: 06-28-09 19:35
Very nice looking. I see you’ve done a bit since the last post. What kind of range are you getting?
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Re: Electrobecane
- Author: bk (---.fv.ks.cox.net)
- Verified User: bkurbexpress
- Date Posted: 06-28-09 19:50
Sweet, I have seen those composite plastic belts at the bearing shop that I buy bearings and seals from. That is a really cool application for it. The bike itself is beautiful. How fast? and what is your range?
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Re: Electrobecane
- Author: mauvescorpion (---.student.iastate.edu)
- Verified User: mauvescorpion
- Date Posted: 06-28-09 19:52
Yay! I’ve been waiting to see this bike done. Very clean work… literally!
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Re: Electrobecane
- Author: _Jesse_ (---.hsd1.fl.comcast.net)
- Verified User: jtbechtold
- Date Posted: 06-28-09 20:03
very nice work man.
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Re: Electrobecane
- Author: JCams (---.hsd1.fl.comcast.net)
- Verified User: jcams
- Date Posted: 06-28-09 20:05
Killer in many ways…
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Re: Electrobecane
- Author: wiffleball (---.dhcp.aldl.mi.charter.com)
- Verified User: wiffleball
- Date Posted: 06-28-09 20:08
this just goes to show that electric vehicles can still be elegant and classy. Outstanding work!
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Re: Electrobecane
- Author: Mouth (---.hsd1.ut.comcast.net)
- Verified User: gowashyourmouth
- Date Posted: 06-28-09 21:31
gnaaaarly
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Re: Electrobecane
- Author: Mike (74.210.103.---)
- Verified User: northernmike
- Date Posted: 06-28-09 22:23
Yup, it’s an eTek.
I need to invest about a grand in batteries. Range right now is marginal.
With a 5” drive pulley I see about 80kph.
With the 4” pulley it’s like 50kph…
Acceleration, however, is INSANE with either.
@ 48V 300A / controller, it’s really just battery discharge-ability limiting acceleration + speed + range.
As I’m just getting it going, motor leads are finalized in #4 but battery leads are at the moment #10.
Another few paycheques and we’ll see what can be done.
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Re: Electrobecane
- Author: Mike (74.210.103.---)
- Verified User: northernmike
- Date Posted: 06-28-09 22:32
Also, FYI this literally BOLTS UP.
Like, drain your gas, unbolt your AV_XX and electrify.
;)
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Re: Electrobecane
- Author: Zeke (---.nilsmimn.qtm.net)
- Verified User: ai
- Date Posted: 06-28-09 22:44
does it variate? and gear out. unless if you still want insane acceleration. o almost forgot nice bike
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Re: Electrobecane
- Author: Doppelgamer (---.dsl.klmzmi.sbcglobal.net)
mattschmitz - Date Posted: 06-28-09 23:21
The mount is impressive, very clean! 80kph top is really good, even better if you get more than a handful of klicks out of it :-) Well done!
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Re: Electrobecane
- Author: keller_stephen (---.proxy.aol.com)
- Verified User: keller_stephen
- Date Posted: 06-29-09 01:37
Very cool indeed, possible stupid q on my part but is there a clutch of any kind or does it freewheel when “throttle” is closed? Pardon my ignorance of how this works. If it does not freewheel can it have regeneritive braking like some electric cars?
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Re: Electrobecane
- Author: Al (---.cpe.net.cable.roger)
- Verified User: ironfist
- Date Posted: 06-29-09 02:13
Im curious about that belt, is it adjustable length? What else you know about it?
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Re: Electrobecane
- Author: Z. Tortuga (---.tc.ph.cox.net)
- Verified User: heteroped
- Date Posted: 06-29-09 02:39
Totally zapalicious sparkatastic job. What’s the total weight ?
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Re: Electrobecane
- Author: rockles (---.hsd1.ma.comcast.net)
mikerock - Date Posted: 06-29-09 02:47
google powertwist for the belt.
rad build! so clean! i bet you can do wheelies easy
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Re: Electrobecane
- Author: jims72 aka king'o'DUSTMITES (63.214.229.---)
- Verified User: nightcrawler
- Date Posted: 06-29-09 05:45
is that a golf car speed controller?
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Re: Electrobecane
- Author: Mike (74.210.103.---)
- Verified User: northernmike
- Date Posted: 06-29-09 06:19
Weight is uncertain. Motor alone weighs 22lbs. Mount, I would guess 3lbs. Controller 7lbs.
And yes, controller is an Alltrax 4834. Turned all the way up.
I’m going to have to ramp the throttle a bit differently, though. It’s a little touchy. I was having too much fun with it to have time to plug it back in to the computer.
No clutch, no variator – coasting accomplished by the controller.
No regen, but it would be possible with an upgrade.
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Re: Electrobecane
- Author: Moby-Wan Kenobi (---.hfc.comcastbusiness.net)
- Verified User: ryanbowers
- Date Posted: 06-29-09 14:38
wow, that things is gorgeous. Great build!
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Re: Electrobecane
- Author: black twingle (---.gac.com)
jconstantinos - Date Posted: 06-29-09 14:50
I am speechless. Compared to my normal volume of speech, anyway.
This is awesome. So far, my favorite part is “this literally BOLTS UP.”
Well, yes, your handmade, custom, aluminum motor mount does indeed match the bolt pattern of your engine mounts exactly. What are the chances?
Still, I think I know what you mean – despite the fact that you did a lot of fabrication work, you didn’t have to cut or drill or weld the frame at all. Hooray for the ability to turn it back to stock!
+++
I’m eager to know what kind of batteries you end up using (so that I can attempt to steal your sources, really). I’m pretty sure that Canadian availability will be different.
I was staring at my household battery drawer this morning, and thinking to myself “we definitely don’t have that many cell phones.”
I’ve built up a small stock of batteries from old phones that are still in perfectly good condition (and unrecycleable, and individually expensive). If I can find a mere 300 more Samsung .3 amp-hour lithium batteries, I will maybe rock an electric bike this nice.
Until then.
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Re: Electrobecane
- Author: Al (---.cpe.net.cable.roger)
- Verified User: ironfist
- Date Posted: 06-29-09 15:33
Man, I would love to see that beast!! Hope you can make it to the Toronto swap meet in July!!
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Re: Electrobecane
- Author: finny (---.dhcp.aldl.mi.charter.com)
- Verified User: ironfist
- Date Posted: 06-29-09 16:33
Rad Mike, rad!
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Re: Electrobecane
- Author: Mike (74.210.103.---)
- Verified User: northernmike
- Date Posted: 06-29-09 16:50
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Re: Electrobecane
- Author: Mike (74.210.103.---)
- Verified User: northernmike
- Date Posted: 06-29-09 17:00
The idea behind using the stock mounting points was not so that I could go back to gas.
It was so that I could take a bunch of you folks with me.
The eTek is a standard NEMA “C” face motor – there are a TON of great motors out there for EV use that can be offered up.
The PERM 132 from Germany. Agni (who just won the electric Grand Prix at the Isle of Man), MARS – the 708, 709 and brushless variants…
I have the materials to build the next one already.
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Re: Electrobecane
- Author: 216chris (---.neo.res.rr.com)
- Verified User: xchokex
- Date Posted: 06-29-09 17:49
suuuuuuuper clean build bro super clean love it.
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Re: Electrobecane
- Author: rthor (---.dynamic.mts.net)
- Verified User: rthorsteinson
- Date Posted: 06-29-09 18:43
That is very fine work. You’ve got to get a video of that bike up on youtube.
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Re: Electrobecane
- Author: nate bandit (---.dhcp.insightbb.com)
nathaneversole - Date Posted: 06-29-09 22:47
soooo good
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battery?
- Author: bengry (---.hsd1.il.comcast.net)
mattbengry - Date Posted: 06-29-09 23:47
so like how does this move?
extension cord?
how heavy?
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Re: battery?
- Author: adam as adam (---.hsd1.mn.comcast.net)
- Verified User: atbabel
- Date Posted: 06-29-09 23:53
need videos.
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Re: battery?
- Author: motobee (---.client.mchsi.com)
- Verified User: motobee
- Date Posted: 06-30-09 00:04
I never thought I’d say this, but dear lord that is awesome. This might catch on.
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Re: battery?
- Author: vic (70.102.2.---)
vic - Date Posted: 06-30-09 00:09
love this idea. If only batteries werent so damn heavy.
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Re: battery?
- Author: max (---.hsd1.ca.comcast.net)
- Verified User: maxspam
- Date Posted: 06-30-09 02:08
Durr does it variate durr hurr
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Re: battery?
- Author: Mike (74.210.103.---)
- Verified User: northernmike
- Date Posted: 06-30-09 05:52
Actually it accelerates so well that variation would be useless.
There’s no powerband, right? It’s 100% torque from 0 rpm to full speed.
Holeshot is neck-snappingly good.
And it doesn’t matter how fast you’re going, hit the throttle and it’s the same snap.
It eats hills. With it’s elbows off the table.
As for batteries, yes, they weigh a little more than gas.
But you REALLY don’t notice ;)
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What you ought to do...!!
- Author: Al (---.cpe.net.cable.roger)
- Verified User: ironfist
- Date Posted: 06-30-09 09:13
Just a thought, though you have likely thought of this yourself, would be to work up some marketable kits once you have the bugs worked out so to speak.
Question: What is the slowest speed you can get it to operate smoothly at? Is you throttle an on/off switch or more of a dimmer switch?
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Re: What you ought to do...!!
- Author: 50plus (---.ks.ks.cox.net)
- Verified User: 50plus
- Date Posted: 06-30-09 14:12
BEautiful work..I’m considering following you too. I just happen to have a dead 50v.
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Re: What you ought to do...!!
- Author: liam (---.dsl.pltn13.sbcglobal.net)
liam - Date Posted: 06-30-09 14:38
stealth modee
put up a video i wanna hear it
youre saying youre going to invest in batteries, but how much are you guessing the setup costs? is this plug in rechargable?
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Re: What you ought to do...!!
- Author: Mike (74.210.103.---)
- Verified User: northernmike
- Date Posted: 06-30-09 16:12
I would LOVE to get Electrobecanes out into the world.
It’s the perfect platform for this motor, renowned in the EV world.
I will totally make a copy of this aluminum mount for anyone who’s interested. If this takes off, I’m going to be shopping for dead Mobies to open up shop.
But anyone with moderate fabrication skills can do the rest of it. The mount is the hard part – the rest is pretty much assembly.
It’s definitely easier than working on an AV7!!
If I can get 5+ orders, I’ll have them CNC’d either by mill or water jet.
I’m considering black anodizing, too.
Al – it is fully proportional control via a Magura potentiometer throttle.
There are dozens of controllers you can use with a setup like this, Alltrax, Curtis, Kelly, Sevcon, etc.
A brand new eTek is $575. Controllers start around $300. Batteries … I’m still working out the costs, but for $500 you can get into good output.
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Re: What you ought to do...!!
- Author: emmanuel lewis (---.hsd1.ca.comcast.net)
- Verified User: biosfear
- Date Posted: 06-30-09 21:06
this is the best thing with wheels i’ve seen on the web all week.. bookmarked.
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Re: What you ought to do...!!
- Author: Elliot (---.dsl.pltn13.pacbell.net)
noahl - Date Posted: 06-30-09 22:04
I’m very interested in purchasing the machined mounts to make a bolt up electric moby. what do you think the range is now, could I get to work and back on one charge? about 10miles total.
not concerned so much with battery weight or costs if I can work the vehicle into my daily life.
stealth moped = amazing.
awesome build mike i’ve been keeping up with ur progress since you started and the results are amazing. sick bike
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Re: What you ought to do...!!
- Author: Mike (---.cpe.net.cable.roger)
- Verified User: northernmike
- Date Posted: 06-30-09 22:45
For range equations I will have to do some metrics.
I would guess that for 10 miles you’ll need about 30Ah (That’s useable discharge, not nominal) ...
But that’s a guess. 40 might be more reasonable, 20 might be feasable. A lot depends on terrain, wind, all up weight, acceleration, speed. Better to have some in reserve, that way you’re not drawing to high a “C” factor.
If you’re hypermiling it range goes WAY up. Blasting sucks amps, of course. Acceleration is never free.
There’s this awesome (and Canadian made) gadget called the “Cycle Analyst” I have to pick up. Shows amps, volts, watts, speed, distance, in real time, plus cumulative, gives you a “fuel gauge” of sorts, recalls max draws, total amps used, watt-hours / mile, etc etc… another $175 I have to find! Totally worth it.
I’m also working on a small+light onboard charger that does it’s work in an 8-hour workday kind of fashion.
Most available lithium chargers like to cycle in about 3.5hrs, so this shouldn’t be a problem.
My work is about the same distance away, my intent is to have a finished product that I can drive into the parking garage, switch off, pull a cord out of and plug in to the wall, and leave it to charge.
A low-power electric Vespa in Maine was doing a similar commute on 22Ah of SLAs – at about 30mph. I think
Was that Elliot or Noah L inquiring? Did the author / user stuff get confused?
Seeing as this mount was the first one, changes are possible.
Anything you guys would like to see on a “production” version?
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Re: What you ought to do...!!
- Author: elliot (---.hsd1.ca.comcast.net)
elliot - Date Posted: 06-30-09 23:09
I wrote the above post, sry I was at work and on noahs account.
Love the build, in sf it might tax the batteries alot, and I can’t plug in at work so the range needs to be good. or at least 10 miles total at full blast.
Seriously it is my dream to have a rad electric moped, I wouldn’t know what to change on the mount unless i saw the bike in person, overall it looks great.
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Re: What you ought to do...!!
- Author: JJ (---.dsl.pltn13.pacbell.net)
- Verified User: painful100
- Date Posted: 06-30-09 23:33
This is awsome
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Re: What you ought to do...!!
- Author: Noah K (---.hsd1.pa.comcast.net)
- Verified User: juggernaught
- Date Posted: 07-01-09 00:17
Think about putting a solar panel on there? Then you could be charging while the bike is locked up at the store, work, wherever.
Also about batteries – a lipo can be charged in an hour. A lot of people like to do it slower to extend the life of the battery or reduce the chance of explosion, but an hour is the bottom line minimum charge time. Also you can have lots of power in a lightweight package IF you are willing to pay for it. I fly electric helicopters for research purposes, the one uses 4×8 AH, 18V batteries. Talking amp hours is meaningless without the voltage, its watt hours that matters. Anyway this 32 AH, 576 WH set of batteries weighs something like eight or ten pounds. And can discharge at 25c, thats 200 amps each. But they are not cheap.
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Re: What you ought to do...!!
- Author: Mike (74.210.103.---)
- Verified User: northernmike
- Date Posted: 07-01-09 06:31
Elliot I’ll try to get some more photos soon.
I’d like to integrate a belt guard and a motor cover into it for safety and weather resistance.
Part of my design criteria for this build is that it does not get hot under any circumstances.
A lesser motor would have the chance to heat up and require cooling so it doesn’t self-destruct. The eTek is apparently good for 300A @72V – But is rated for 130A @ 36V.
Here’s Eva’s build (which melted one) – a bigger frame and much more weight, but the specs are good reference…
http://www.evahakansson.se/#category2.
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Re: What you ought to do...!!
- Author: bengry (---.hsd1.il.comcast.net)
mattbengry - Date Posted: 07-01-09 08:12
mark me down as interested for a motor plate.
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Re: What you ought to do...!!
- Author: Mike (74.210.103.---)
- Verified User: northernmike
- Date Posted: 07-01-09 09:44
That’s two! I’m going to get a guy on some CNC drawings…
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Re: What you ought to do...!!
- Author: _Jesse_ (---.hsd1.fl.comcast.net)
- Verified User: jtbechtold
- Date Posted: 07-01-09 09:45
I’m also interested depending on the price.
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Production preparations
- Author: Mike (74.210.103.---)
- Verified User: northernmike
- Date Posted: 07-01-09 10:11
Cost is going to be pretty reasonable. Aluminum isn’t cheap, but there isn’t that much of it here. I bet if I buy quantities I can do better than I did on this one, too.
There’s a pile of stainless steel hardware that goes into making this – no welds to vibrate loose – and two big chunks of transformer isolation rubber (of which I have a sheet, enough for a few batches) ...
I’m going to target $150, I think that’s probably feasible.
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Re: Production preparations
- Author: Al (---.cpe.net.cable.roger)
- Verified User: ironfist
- Date Posted: 07-01-09 10:17
Keep me in the loop if possible! Think you might make it to the swap meet?
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Re: Production preparations
- Author: Mike (74.210.103.---)
- Verified User: northernmike
- Date Posted: 07-01-09 10:36
Al I’m not sure about the meet. Looks like I might be shopping for aluminum ;)
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Re: Production preparations
- Author: Al (---.cpe.net.cable.roger)
- Verified User: ironfist
- Date Posted: 07-01-09 10:41
At a swap meet you never know what will be there lol…but seriously, you could think of it as a marketing opportunity, see it in action could get the people really talking!! I know I want to see it rip!
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Re: Production preparations
- Author: Mike (---.cpe.net.cable.roger)
- Verified User: northernmike
- Date Posted: 07-01-09 10:56
Al I will if I can – I still have a bunch of gas parts to sell! ;)
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Re: Production preparations
- Author: elliot (---.dsl.lmi.net)
elliot - Date Posted: 07-01-09 13:48
yeah keep me in the loop with the development of the mounts I’m very interested.
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Re: Production preparations
- Author: black twingle (---.gac.com)
jconstantinos - Date Posted: 07-01-09 14:24
You’re using that etek motor? I thought you had found a smaller one. Damn!
They took the ElectroCat to the drag races. Granted, they also took 350 pounds of batteries, but still…
Anyway, on bringing your batteries into work:
The more money you spend on batteries, the lighter they will end up being (sealed lead acid to NiCd to NiMH to Lithium – lighter and lighter), and the more convenient charging becomes (sealed lead acid and NiCd need full discharge, NiMH and Lithium can be topped-off).
The goal I’ve always sought is the “briefcase battery,” or “laptop battery” – a battery pack that is the same size as a briefcase or laptop case and light enough to carry easily.
Then, commuting would be a matter of parking your bike, and bringing the battery case inside with you where you could plug it in anywhere.
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Batteries.
- Author: Mike (74.210.103.---)
- Verified User: northernmike
- Date Posted: 07-01-09 15:01
I have a small LiMn pack from Yardworks tools under construction. These sell in bricks of 5 cells, 20V/6AH packs that discharge with a fused BMS limiting them to about 30A / pack. Some eBike folks have had good success.
A local shop, Blue Avenue, has an eBike powered by lithium that they’re claiming has a 100km range. I was told by one of their customers that this pack cost $1300. (CDN)
NiCd and NiMH are out of the question for me. Neither provides enough discharge from a large enough capacity format to allow the construction of a pack without 1,000,000 solder joints or CD welds.
a123’s high C rates make this worthwhile, but it’s still a massive pack.
I’m interested in a 10-12 cell 40Ah Thundersky pack from Electric Motorsport, but have to get the BMS sorted out first.
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Mount updates
- Author: Mike (74.210.103.---)
- Verified User: northernmike
- Date Posted: 07-01-09 15:06
Looks like my waterjet friend is totally capable of the work.
http://www.waterjetcutting.ca/gallery/index.asp
See the really shiny oval thing under custom work? That’s a sauna stove (Kiuas) he made 5 of for a company my dad and I tried to get started. Turns out very few people want a $5,000 sauna stove. Oh well.
Unfortunately he’s closed today (Canada day) so I can’t bug him to book shop time.
I found two anodizing shops close to me here in the city, we’ll see what my emails bring.
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Thoughts on batteries.
- Author: Mike (74.210.103.---)
- Verified User: northernmike
- Date Posted: 07-01-09 15:12
Also – SLA should not be fully discharged. This just multiplies the Peukert effect. NiCd can be “topped off”. NiMH gets ridiculously hot under heavy discharge / recharge …
Lithium is the way forward, but you need the right BMS.
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Re: Battery shopping
- Author: Mike (74.210.103.---)
- Verified User: northernmike
- Date Posted: 07-01-09 19:20
Note also the slim profile of the eTek – it’s as though it was MADE for the Moby!
Brake levers are also Magura, with brake light switch. Stock brake light has been converted to LED.
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Re: Electrobecane
- Author: Zap Tortuga (---.tc.ph.cox.net)
- Verified User: heteroped
- Date Posted: 07-01-09 19:21
Puch mount!
Puch mount!
Puch mount!
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Re: Electrobecane
- Author: terrydean (---.tukw.qwest.net)
dean - Date Posted: 07-01-09 19:44
why puch mount? mbks are so much prettier.
rad bike man! if it weren’t for batteries being such a hassle, i’d be way more into this!
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Re: Electrobecane
- Author: Mike (74.210.103.---)
- Verified User: northernmike
- Date Posted: 07-01-09 21:10
Batteries are not such a hassle, comparatively.
eTek brushes are reportedly good for 50,000 miles.
Other than recharging, that’s about all the maintenance this will need.
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Re: Electrobecane
- Author: Cappy (---.dsl.snlo01.sbcglobal.net)
- Verified User: cappy
- Date Posted: 07-02-09 04:17
Renthal road race grips are the bomb. Always been my favorate.
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Re: Electrobecane
- Author: Mopedmaynard (---.sc.res.rr.com)
- Verified User: mopedmaynard
- Date Posted: 07-02-09 13:36
rain friendly?
Moby’s are fucking gorgeous. but puch mount is inevitable. yet i cant see sattle bags on a cafe’d magnum, lol.
And what would we be looking at, in terms of price, for a finished ped? (not including the ped its self… ie. mount, controler, batt’s, stuff like that…)
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Weather resistance
- Author: mike (---.cpe.net.cable.roger)
- Verified User: northernmike
- Date Posted: 07-02-09 17:24
Rain resistance would be easily accomplished with a splash sheild. The eTek won’t get hot powering a moped, so ventilation isn’t a huge concern.
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Anodizing progress.
- Author: mike (---.cpe.net.cable.roger)
- Verified User: northernmike
- Date Posted: 07-02-09 17:34
Found an anodizing shop! Black, right? ;)
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put this in the wiki
- Author: rei (---.hsd1.mn.comcast.net)
- Verified User: blackkat
- Date Posted: 07-02-09 21:02
fantastic job
once you have all the details worked out, please post pics, drawings, how to’s, (if you come up with a sellable kit) in the wiki for all to refer to
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More riding
- Author: mike (---.cpe.net.cable.roger)
- Verified User: northernmike
- Date Posted: 07-02-09 21:57
Loosened the chain by a half turn on the bolts and lost all my drivetrain noise.
Then popped my first electric wheelie.
HOLY COW.
Good ride! Gained a bunch of range too.
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Re: More riding
- Author: JJ (---.dsl.pltn13.pacbell.net)
- Verified User: painful100
- Date Posted: 07-03-09 00:16
Can we get some video going? I wanna see this in action.
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Re: More riding
- Author: Mike (---.cpe.net.cable.roger)
- Verified User: northernmike
- Date Posted: 07-03-09 06:24
Sunday = video. Promise. ;)
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Battery update
- Author: Mike (74.210.116.---)
- Verified User: northernmike
- Date Posted: 07-05-09 07:24
A gentleman in Michigan has a great solution for us.
We can use DeWalt 36V Lithium Ion (the best, a123 cells) with THEIR BUILT IN BMS, using his interface board:
I would recommend a minimum of 6 of these packs for an Electrobecane – in parallel. (6P)
With the same motor and a 72 volt controller you can of course run them in 2S3P. But JESUS gear up, unless you want some serious tickets.
The main advantages of this being that:
1. you buy as many cheap chargers as you have batteries, plug them all in at once and your bike is charged in ONE HOUR
2. you keep the DeWalt factory warranty
3. it’s all clean and neat and modular.
The DeWalt packs are all over eBay. Just make sure you’re getting the Nano Phosphate ones.
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Re: Battery update
- Author: gogo (---.client.mchsi.com)
- Verified User: gogo
- Date Posted: 07-05-09 12:41
My Milwaukee Lithium batteries have a 5 year warranty. 1000 charges/2yrs. free replacement, 2000 charges and prorate for the rest of 5 years. Gotta love the warranties.
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Dude...
- Author: DrunkSkunk (---.sbc.com)
- Verified User: drunkskunk
- Date Posted: 07-05-09 14:05
Dude, every time I find another of your posts, I go on a frantic search for a top tank Pug frame again.
Imaine 3 of those headway 48V packs hidden in the tank, under the seat, and in the open space below the tank.
10 miles to a charge, and 10 miles to a tire. >:)
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Re: Dude...
- Author: Chris (---.hsd1.ca.comcast.net)
- Verified User: skater4145
- Date Posted: 07-05-09 16:55
this just keeps getting better and better. super rad
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YouTube enroute
- Author: mike (---.cpe.net.cable.roger)
- Verified User: northernmike
- Date Posted: 07-05-09 17:45
Video shot. Edit + upload in the next 6hrs.
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Re: Electrobecane
- Author: rthor (---.dynamic.mts.net)
- Verified User: rthorsteinson
- Date Posted: 07-05-09 22:19
Bravo Mike! That thing really moves. Excellent take-off too.
I think this idea is going to catch on.
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Re: YouTube enroute
- Author: Mike (74.210.116.---)
- Verified User: northernmike
- Date Posted: 07-05-09 22:19
ok they’re up
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Re: YouTube enroute
- Author: Mike (74.210.116.---)
- Verified User: northernmike
- Date Posted: 07-05-09 23:02
And I’m off to bed. ‘night!
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Re: YouTube enroute
- Author: Petethewheat (---.nyc.res.rr.com)
peted - Date Posted: 07-06-09 02:08
WOW! I just watched your video, I can’t believe how much that thing rips!
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Battery capacity
- Author: Mike (74.210.116.---)
- Verified User: northernmike
- Date Posted: 07-06-09 18:27
Yes Matt – in a nutshell, increasing battery voltage increases top speed, and increasing battery capacity (Amp-hours) increases range.
Battery Management Systems are there to protect the batteries from over-discharge to levels that would harm the battery. Below a chemistry-specific threshold voltage, Lithium Ion secondary batteries begin to irreversibly self-destruct. Overcharging has the same effect. Also, drawing excessive current can be harmful.
The design ideal is to present enough battery capacity to the motor so that a reasonable amount of current is drawn, and not more.
So – larger capacity batteries not only deliver power at a given rate (amps) for longer, they also suffer less when greater loads are presented.
This phenomenon has a fairly new unit of measure – termed “C”. When a battery is rated, for example, as capable of 20 C – it means it will deliver it’s capacity at 20 times that measure.
So, a 10Ah pack rated for 20C can dump 200A.
Of course, it will only do this for 1/20th of an hour – 3 minutes.
Luckily the Electrobecane doesn’t draw anywhere close to that!
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Re: Battery capacity
- Author: Cm (---.mobile.mymmode.com)
- Verified User: turntheradiooff
- Date Posted: 07-06-09 19:32
This is so cool!
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Motor mount production news
- Author: Mike (74.210.116.---)
- Verified User: northernmike
- Date Posted: 07-06-09 19:34
Update: My waterjetting shop is in touch. Quote is in process.
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Re: Motor mount production news
- Author: Mike (74.210.98.---)
- Verified User: northernmike
- Date Posted: 07-13-09 18:16
Starting a Wiki. Will be listing sources for wire, connectors, controllers, gauges, batteries, etc.
After a few more beers.
Cripes. What a Monday.
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