Search found 953 matches

by EVTodd
Aug 08 2015 8:02am
Forum: E-Bike Non-hub Motor Drives
Topic: Commuter Booster - <1kg Friction Drive
Replies: 1345
Views: 269475

Re: Commuter Booster - <1kg Friction Drive

Folken wrote:Of course the motor will disengage because there is no load. Just test it on the road.
Or you can use your brake to provide the load if you're testing on a stand.
by EVTodd
Aug 07 2015 12:47pm
Forum: E-Bike Technical
Topic: Yescom Kit 36V Controller internals revealed
Replies: 15
Views: 1957

Re: Yescom Kit 36V Controller internals revealed

I'm thinking about picking up one of these Yescom kits since they are so cheap. Does anyone know if there is any difference between their hubs that have the silver rings around them (on the side, I assume it's just decorative) and the solid black ones? The ones with the rings are less expensive for ...
by EVTodd
Aug 05 2015 10:48pm
Forum: E-Bike General Discussion
Topic: Bolt M-1 Electric Moped with pedals
Replies: 42
Views: 7741

Re: Bolt M-1 Electric Moped with pedals

LockH wrote:Oh oh Cap'n Todd... "... first production run of it has sold out. The M-1 is listed at US$5, 485."
http://interestingengineering.com/bolt- ... d-bicycle/
Lol. I notice they don't say how big that production run is. Whatever though. More power to 'em.
by EVTodd
Aug 02 2015 3:55pm
Forum: E-Bike Technical
Topic: Pedal at friction motor speed question.
Replies: 10
Views: 992

Re: Pedal at friction motor speed question.

Not sure what you mean. but I do know that on a direct drive hubmotor, 50w will eliminate cogging, if you want to run on pedal power without having to also push the motor. So likely, you will pull less than 50 w. Even with a small battery, you can run like this two hours or more using less than 100...
by EVTodd
Aug 01 2015 5:28pm
Forum: E-Bike Technical
Topic: Pedal at friction motor speed question.
Replies: 10
Views: 992

Re: Pedal at friction motor speed question.

If your outrunner is hard engaged against your tire and you are pedaling at say 12 mph with your throttle matching your speed, is there much battery power used beyond idle? That can vary a lot depending on your particular speed. Within a range of 1/2 mph you can go from applying a significant load ...
by EVTodd
Jul 30 2015 10:09pm
Forum: E-Bike General Discussion
Topic: Bolt M-1 Electric Moped with pedals
Replies: 42
Views: 7741

Re: Bolt M-1 Electric Moped with pedals

Hehe... But Master Todd. This UK Bolt ownership "supported by ETA Euro breakdown cover for motorbikes". Not sure that was in original Bolt PR but may "sweeten the deal" for UK folks? :) Come on... Master? Mister Todd is good enough :lol: Seriously though, would you really pay $5k for that? And for ...
by EVTodd
Jul 30 2015 6:44pm
Forum: E-Bike General Discussion
Topic: Bolt M-1 Electric Moped with pedals
Replies: 42
Views: 7741

Re: Bolt M-1 Electric Moped with pedals

Bolt M-1 in news. Again... "Peddling battery bikes: The Bolt electric moped" https://www.eta.co.uk/2015/07/30/peddling-battery-bikes-the-bolt-electric-moped/ (This time on the UK Environmental Transport Association website.) Yup. Another media outlet picked up their press release. Whoopee. I know t...
by EVTodd
Jul 26 2015 7:12pm
Forum: E-Bike Non-hub Motor Drives
Topic: Front wheel Friction drive
Replies: 35
Views: 12512

Re: Front wheel Friction drive

I don't remember if the motor needs to be on the left or the right, for the start-up torque to flip it onto the tire tread, but... With the top of the tire going forward (for the bottom to be going back), the motor needs to swing back and be pulling forward. This means that the way you have drawn i...
by EVTodd
Jul 26 2015 6:31pm
Forum: E-Bike Non-hub Motor Drives
Topic: Front wheel Friction drive
Replies: 35
Views: 12512

Re: Front wheel Friction drive

Design is sound. Dont forget to add endstop adjustment and a method of spring loading the roller off the tire in the off position. Yes, I don't know how I will do it, but I will add it ! I began machining the parts of the friction drive : http://2roueselectriques.e-monsite.com/medias/images/5-5.jpg...
by EVTodd
Jul 25 2015 10:45pm
Forum: E-Bike Non-hub Motor Drives
Topic: Front wheel Friction drive
Replies: 35
Views: 12512

Re: Front wheel Friction drive

maxchilton wrote:your design is flawed, the inertia from the motor startup will actually spin the roller away from the tire and it won't engage. You need to put the swing mechanism behind the steering fork.

Lol. Only if he's riding backwards.
by EVTodd
Jul 25 2015 4:03pm
Forum: E-Bike Non-hub Motor Drives
Topic: Ebike Controller on Outrunner Friction Drive
Replies: 11
Views: 2298

Re: Ebike Controller on Outrunner Friction Drive

Well you are best suited for advice as your setup is what most closely matches my specs. As I stated in my original post I'm hoping for a drive that can achieve 25-30 mph max speed. On the old commuter booster page Turnigy Brushless ESC 85A is listed. Does this seem suitable for my purposes, or wou...
by EVTodd
Jul 22 2015 1:00pm
Forum: E-Bike Non-hub Motor Drives
Topic: Ebike Controller on Outrunner Friction Drive
Replies: 11
Views: 2298

Re: Ebike Controller on Outrunner Friction Drive

You won't see anywhere near that speed on a real world setup and you shouldn't anyway, it is a bicycle after all. 15 amps will be nowhere near enough for this combo, especially if you use the can of the motor as the roller. I would reconsider that voltage and battery choice. It just doesn't match up...
by EVTodd
Jul 18 2015 6:19pm
Forum: E-Bike Non-hub Motor Drives
Topic: Ebike Controller on Outrunner Friction Drive
Replies: 11
Views: 2298

Re: Ebike Controller on Outrunner Friction Drive

All good info and adding hall sensors would make for a nice drive for sure. Sensorless would be much easier though.
by EVTodd
Jul 18 2015 10:02am
Forum: E-Bike Technical
Topic: Geared Bafang Hub Motor Gear Lube?
Replies: 3
Views: 653

Re: Geared Bafang Hub Motor Gear Lube?

I use the red synthetic Mobile hi-temp wheel bearing grease. Works well in the Xiongda 2 speed. otherDoc Thanks Doc! I actually have some of that here. For now I stole some of the green grease from one motor and put a bit in the one that didn't have much. Seems like if the gears are just coated wel...
by EVTodd
Jul 18 2015 9:57am
Forum: E-Bike Non-hub Motor Drives
Topic: Ebike Controller on Outrunner Friction Drive
Replies: 11
Views: 2298

Re: Ebike Controller on Outrunner Friction Drive

Good to see someone understanding how cheap it can be to build a friction drive and not paying the insane prices these companies are trying to charge. I've been wanting to try a cheap sensorless controller myself but I haven't figured out if they can handle the high rpms you need with a friction dri...
by EVTodd
Jul 16 2015 11:21pm
Forum: General Discussion
Topic: Your best Craigslist or Ebay find
Replies: 7
Views: 1161

Re: Your best Craigslist or Ebay find

Can I post my best terrible Craigslist find here?

http://iowacity.craigslist.org/bik/5117992102.html

So bad I don't even know where to start. :lol:
by EVTodd
Jul 16 2015 10:47pm
Forum: E-Bike Technical
Topic: Geared Bafang Hub Motor Gear Lube?
Replies: 3
Views: 653

Re: Geared Bafang Hub Motor Gear Lube?

Actually, I just opened both of them again and one has a ton of grease in it, not sure why I thought it was almost dry but it was a while ago when I first had it open. The other one has very little. It's a green grease that smells like pretty much any other wheel bearing grease. Any suggestions on w...
by EVTodd
Jul 16 2015 1:45pm
Forum: E-Bike Technical
Topic: Geared Bafang Hub Motor Gear Lube?
Replies: 3
Views: 653

Geared Bafang Hub Motor Gear Lube?

I recently got my hands on a couple of Bafang geared hubs (surplus Schwinn Tailwind) motors. Built them up into a couple of wheels and they work great. Before I put them together I opened the hubs up and noticed that there is very little in the way of gear lube in them. Does anyone have any recommen...
by EVTodd
Jul 15 2015 8:52pm
Forum: E-Bike General Discussion
Topic: Bolt M-1 Electric Moped with pedals
Replies: 42
Views: 7741

Re: Bolt M-1 Electric Moped with pedals

All of these "bikes" that have a low power and "off road" mode crack me up. Who wants to ride a tiny moped at 20 mph? My little, cheap, bafang hub motor can do that. Switch to 40 mph and you would certainly need plates and insurance where I live and I'm guessing these won't have vin numbers or title...
by EVTodd
Jul 11 2015 10:25pm
Forum: E-Bike General Discussion
Topic: Bolt M-1 Electric Moped with pedals
Replies: 42
Views: 7741

Re: Bolt M-1 Electric Moped with pedals

I like it but there's nothing new here. It's just an old moped with a simple conversion. I have an old moped I want to convert but with all the Harley jerks where I live good luck riding it 2 miles without getting in a fight. I need to move! Lol Wait... $5000?! Are you freakin' kidding me? Who would...
by EVTodd
Jul 10 2015 3:40pm
Forum: Electric Watercraft
Topic: Another trolling motor project. Need controller advice.
Replies: 7
Views: 3341

Re: Another trolling motor project. Need controller advice.

After looking at a lot of 24v ebike brushed controllers it appears that they have a lvc of 20v or so which won't work for 5s so I think I'm going with this controller instead: http://www.amazon.com/RioRand-7-60V-Motor-Controller-Switch/dp/B00JEXJXAC/ref=sr_1_1?ie=UTF8&qid=1436560493&sr=8-1&keywords=...
by EVTodd
Jul 09 2015 5:11pm
Forum: Items for Sale - New
Topic: Kinaye Motorsports
Replies: 175
Views: 27413

Re: Kinaye Motorsports

So are the Farfle swingarms a dead project now? I see there's no mention of them on your website now.
by EVTodd
Jul 09 2015 12:11pm
Forum: Electric Watercraft
Topic: Another trolling motor project. Need controller advice.
Replies: 7
Views: 3341

Another trolling motor project. Need controller advice.

For several years my wife and I have been using a 15" canoe to fish small rivers. We don't have anyone to shuttle us up stream so we use a trolling motor to go up the rivers then float back down. It works great but I'm tired of using a 70 pound deep cycle battery that has to be replaced at least onc...
by EVTodd
Jul 05 2015 1:34pm
Forum: E-Bike Technical
Topic: Is my wheel going to explode?!?!
Replies: 32
Views: 2609

Re: Is my wheel going to explode?!?!

Again, I didn't mean to open a can of worms when I started this thread. This is just the first hub motor wheel I've ever built and don't know how I missed all the talk about 12 gauge spokes being too thick. This is pretty much a smooth paved bike trail bike so from what everyone is saying it doesn't...
by EVTodd
Jul 03 2015 4:51pm
Forum: E-Bike Technical
Topic: Is my wheel going to explode?!?!
Replies: 32
Views: 2609

Re: Is my wheel going to explode?!?!

Hmmm, I didn't realize spoke size was such a touchy subject. Some interesting points to ponder.