Search found 953 matches

by EVTodd
Oct 09 2008 7:52pm
Forum: E-Bike Technical
Topic: Help me pick an outrunner for my next project
Replies: 19
Views: 2876

Re: Help me build Ghetto Electric V2.0

Wow. No one here has any experience with lower priced outrunners and controllers?
by EVTodd
Oct 07 2008 6:20pm
Forum: E-Bike Technical
Topic: Help me pick an outrunner for my next project
Replies: 19
Views: 2876

Re: Help me build Ghetto Electric V2.0

Hey, a Hi-Koll. They can put out quite a lot more then their rated power, you must use an external controller. You can feed it 1.5+kw no problems, overspeeding is what causes problems. I do indeed use an external ecrazyman controller at 36 volts on my hi koll. The photo is the drive for my girlfrie...
by EVTodd
Oct 07 2008 1:15pm
Forum: E-Bike Technical
Topic: Help me pick an outrunner for my next project
Replies: 19
Views: 2876

Re: Help me build Ghetto Electric V2.0

Get an outrunner that is twice as powerful as you think you need. The cheap ones are over rated, and the power in does not equal power out. Efficiencies of cheap outrunners can be anywhere from 60s to low 80s, not that great. Wow, that kind of stinks. So if a cheap outrunner says it will put out 92...
by EVTodd
Oct 07 2008 7:24am
Forum: E-Bike Technical
Topic: Help me pick an outrunner for my next project
Replies: 19
Views: 2876

Re: Help me build Ghetto Electric V2.0

your speed in real life will be nowhere near the no-load speed, which becomes "more true" with higher velocities. I do realize the no load speed will be much higher than actual top speed which is why I said "theoretical" top speed. That, of course, is true with any motor. I guess I'm hoping someone...
by EVTodd
Oct 06 2008 7:19pm
Forum: E-Bike Technical
Topic: Help me pick an outrunner for my next project
Replies: 19
Views: 2876

Re: Help me build Ghetto Electric V2.0

Here is one of the cheap ones I was looking at: http://cgi.ebay.com/aeolian-790kv-Outrunner-Brushless-motor-80A-ESC-MM35_W0QQitemZ220288791891QQcmdZViewItem?hash=item220288791891&_trkparms=72%3A1205%7C39%3A1%7C66%3A2%7C65%3A12%7C240%3A1318&_trksid=p3911.c0.m14 It lists the motor as putting out 920 w...
by EVTodd
Oct 05 2008 9:02pm
Forum: E-Bike Technical
Topic: Help me pick an outrunner for my next project
Replies: 19
Views: 2876

Help me pick an outrunner for my next project

As some of you may have seen my other posts, I'm a big fan of friction drive. I currently have a 36 volt Kollmorgen setup that I am very happy with (I've done around 1000 miles with it so far) and want to start a winter project using an rc motor (or two). Here is the drive unit I came up with for th...
by EVTodd
Sep 16 2008 11:37pm
Forum: E-Bike General Discussion
Topic: Breakthrough e-bike design. Well, maybe not...
Replies: 12
Views: 1457

Re: Breakthrough e-bike design. Well, maybe not...

I just noticed this quote too: "you cant get in trouble riding it around on the road in my neighbor so id call it street legal". Too funny.
by EVTodd
Sep 16 2008 11:08pm
Forum: E-Bike General Discussion
Topic: Breakthrough e-bike design. Well, maybe not...
Replies: 12
Views: 1457

Breakthrough e-bike design. Well, maybe not...

Ok... It's not an e-bike but maybe it can give you guys some ideas for outrunner motors. No need to reduce the rpms! LOL :lol:

http://qconlineauction.com/site/view_ad.php?v=237916

I hope no one flips over the bars on that one! Would be easy with all the weight up front.
by EVTodd
Sep 01 2008 10:19pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Peugeot - E-Speriment!!!
Replies: 104
Views: 17656

Re: Peugeot - E-Speriment!!!

Great looking build! I'm getting ready to use a similar frame on my second project... Lugged chrome alloy early 90's mountain bike frame in my case. I'm an old bmxer so I'm a big fan of steel and really don't see the big attraction with aluminum. Anyway... I really like the look of that rear rack. W...
by EVTodd
Aug 03 2008 11:53pm
Forum: E-Bike Technical
Topic: 150cc scooters selling like hot cakes
Replies: 50
Views: 6737

Re: 150cc scooters selling like hot cakes

Still... My girlfriend's Focus has over 70,000 miles on the rear drums with the original shoes. The drums are very cheap for a Focus and there's nothing strange or special about them. Very easy to change too. I'll shut up about it now but please have your mom look into it a bit before plunking down ...
by EVTodd
Aug 03 2008 2:04am
Forum: E-Bike Technical
Topic: 150cc scooters selling like hot cakes
Replies: 50
Views: 6737

Re: 150cc scooters selling like hot cakes

I have an SVT Focus but I've worked on an SE's braking system as well. Very normal brakes. I'm guessing they just found a really expensive mechanic who is trying to see how much money he can get out of them. Even if they need new rotors that's way way too much. Now if she needs calipers too... How m...
by EVTodd
Aug 02 2008 11:38pm
Forum: E-Bike Technical
Topic: 150cc scooters selling like hot cakes
Replies: 50
Views: 6737

Re: 150cc scooters selling like hot cakes

Semi-interesting sidenote: My parent's car might need new brake pads or whatever. Thing is, Ford Focuses have to have the whole brake assembly replaced to do this, I guess, which will end up costing something like $500. Huh?! I just replaced the brake pads on my Focus. I put new rotors on just to b...
by EVTodd
Aug 02 2008 12:39pm
Forum: E-Bike Technical
Topic: Ecrazyman Thumb Throttle
Replies: 5
Views: 623

Re: Ecrazyman Thumb Throttle

I finally got around to fixing the throttle. It was actually very easy to open and put the spring back in place. One of the tabs was broken on the casing which is what caused the spring to pop out of place.

Like I said before... I really need to get a kill switch wired up.
by EVTodd
Jul 28 2008 7:07am
Forum: E-Bike Technical
Topic: Ecrazyman Thumb Throttle
Replies: 5
Views: 623

Re: Ecrazyman Thumb Throttle

Actually, the throttle still works but it feels like a spring broke inside. It just doesn't return to it's original position. I'll open it up tonight when I get home from work.
by EVTodd
Jul 27 2008 9:38pm
Forum: E-Bike Technical
Topic: Ecrazyman Thumb Throttle
Replies: 5
Views: 623

Re: Ecrazyman Thumb Throttle

Yeah, I know I'll have to rip 'er open. I was just hoping someone else had one apart at some time.

Actually, are there any better thumb throttles? I'm not sure I even want to mess with it if it's going to break that easy.
by EVTodd
Jul 27 2008 7:00pm
Forum: E-Bike Technical
Topic: Ecrazyman Thumb Throttle
Replies: 5
Views: 623

Ecrazyman Thumb Throttle

It's so frustrating when you finally get a project done to where you want it and something breaks. haha I just came back from my second real ride on my current project and had a problem with my brand new Ecrazyman thumb throttle. It felt like a return spring inside broke or came loose. Here is the o...
by EVTodd
Jul 19 2008 11:24am
Forum: E-Bike Build Threads / Photos & Video
Topic: Dave's stealth Kona Smoke (Heinzmann with Milwaukee)
Replies: 24
Views: 6100

Re: Dave's stealth Kona Smoke (Heinzmann with Milwaukee)

I find the bag actually quite interesting .... have not seen this design before with only bags on the side. Is this a bag that one can easily buy? Does it have a brand and model? :shock: I have a couple of these bags on my bikes too. Very nice if not a bit small. I found them on Ebay. They are actu...
by EVTodd
Jul 15 2008 10:25am
Forum: E-Bike Build Threads / Photos & Video
Topic: Dave's stealth Kona Smoke (Heinzmann with Milwaukee)
Replies: 24
Views: 6100

Re: Dave's stealth Kona Smoke (Heinzmann with Milwaukee)

Wow! That's a nice looking bike. I'm currently building an ebike for my girlfriend. She has a Kona that looks a lot like that. I wish it was all black like yours. Very stealthy indeed.
by EVTodd
Jul 13 2008 2:20pm
Forum: E-Bike Non-hub Motor Drives
Topic: Using RC motors on E-bikes [Archive]
Replies: 1244
Views: 169058

Re: Using RC motors on E-bikes


Voltage is voltage. Motors don't care where the voltage comes from, as long as its the correct voltage.
That's what I thought but I just wanted to make sure there wasn't something 'special' about these outrunners that would make an sla explode or something. :D
by EVTodd
Jul 13 2008 1:59pm
Forum: E-Bike Non-hub Motor Drives
Topic: Using RC motors on E-bikes [Archive]
Replies: 1244
Views: 169058

Re: Using RC motors on E-bikes

Ok, this is probably a really dumb question but can you power one of these motors with sla batteries? I'm thinking about picking one up to try some testing with my little friction drive system. I know slas defeat the purpose of having a small lightweight motor but I would like to try it out before p...
by EVTodd
Jul 06 2008 1:12pm
Forum: E-Bike General Discussion
Topic: Ecrazyman controller with Kollmorgen?
Replies: 99
Views: 13952

Re: Ecrazyman controller with Kollmorgen?

Since you didn't remove all of it where do the wires come out of the motor? The hole for the wires is deep in the potting. I don't have a picture of it, but the old controller guts were milled out in a triangular shape around where the wires come in. They milled right through the components, wires,...
by EVTodd
Jul 05 2008 11:32pm
Forum: E-Bike General Discussion
Topic: Ecrazyman controller with Kollmorgen?
Replies: 99
Views: 13952

Re: Ecrazyman controller with Kollmorgen?

fechter wrote:You don't need to remove all the potting. The one I have has a channel milled out of the former controller to make clearance for the wires, but most of it is still in there.
Since you didn't remove all of it where do the wires come out of the motor? The hole for the wires is deep in the potting.
by EVTodd
Jul 05 2008 4:33pm
Forum: E-Bike General Discussion
Topic: Ecrazyman controller with Kollmorgen?
Replies: 99
Views: 13952

Re: Ecrazyman controller with Kollmorgen?

After thinking about it, getting rid of the potting for the factory controller is counterproductive in terms of getting rid of the heat. Epoxy has a many times greater thermal conductivity than air, so increasing the thickness of that air layer by removing the potting is essentially adding insulati...
by EVTodd
Jul 05 2008 1:03pm
Forum: E-Bike Technical
Topic: Friction Drive Plan (a new twist)
Replies: 28
Views: 3521

Re: Friction Drive Plan (a new twist)

I also have 2 EV Warrior friction drives that have some kind of one way freewheel bearing. I need to fabricate a 3.4" diameter friction wheel that will get me right at 10mph per 1000rpm. John John, I'm currently using EV Warrior rollers myself. The clutch bearings they use are a great idea since th...
by EVTodd
Jul 05 2008 11:34am
Forum: E-Bike General Discussion
Topic: Ecrazyman controller with Kollmorgen?
Replies: 99
Views: 13952

Re: Ecrazyman controller with Kollmorgen?

Does anyone know the stock max rpm specs for this motor? I've read anywhere from 2500 to 3500 rpms. According to my math, mine was spinning at 2800 rpms with the stock controller.