Search found 503 matches

by dozentrio
Jul 13 2020 5:15pm
Forum: E-Bike Non-hub Motor Drives
Topic: 20 inch rim recommendation?
Replies: 1
Views: 237

20 inch rim recommendation?

Hi folks, I recently took my folding bike belt drive for a 120 km trip and close to the end my rear rim sidewall failed. I suspect it was due to running 90 psi on rims that weren't intended for that. I want to replace the rim with something more durable but I'm a bit lost as to what rim to chose. Un...
by dozentrio
Apr 24 2020 8:11am
Forum: E-Bike Non-hub Motor Drives
Topic: Project Shoestring
Replies: 23
Views: 1143

Re: Project Shoestring

Are you sure the frame will be strong enough? My guess is there will be a lot of stress concentrated where the frame is narrow right at the top inner corner of the battery box.
by dozentrio
Apr 23 2020 9:34am
Forum: E-Bike Non-hub Motor Drives
Topic: Mid-Drive Folding Ebike Build
Replies: 3
Views: 395

Re: Mid-Drive Folding Ebike Build

Thanks.

It is 6x3 inch aluminum (outside dimension) with 3/16 inch wall thickness. The thick walls mean I can tap the holes and screw to the box directly. But I'm still not happy about the weight.
by dozentrio
Apr 22 2020 5:31pm
Forum: E-Bike Non-hub Motor Drives
Topic: Recommendations on a chain tensioner for my1016z2 left chain drive motor
Replies: 3
Views: 293

Re: Recommendations on a chain tensioner for my1016z2 left chain drive motor

Hi Paul, As amberwolf recommended in another one of your posts, you need to improve the chain alignment. I don't think a chain tensioner will improve things. You need to modify the motor mount. You could potentially add some kind of spacer between the frame and the motor mounting plate so that the c...
by dozentrio
Apr 22 2020 3:15pm
Forum: E-Bike Non-hub Motor Drives
Topic: Mid-Drive Folding Ebike Build
Replies: 3
Views: 395

Mid-Drive Folding Ebike Build

The first bike I built was a mid drive and it was ultimately a frustrating experience for me due to the chain frequently coming off. I built a couple increasingly powerful and heavy hub drive bikes until reaching the point where bicycle tires, brakes and suspension were over-taxed by the speed and w...
by dozentrio
Apr 22 2020 1:17pm
Forum: E-Bike Technical
Topic: Powerful middrive in a carbon frame
Replies: 28
Views: 3105

Re: Powerful middrive in a carbon frame

Would also like to know!
by dozentrio
Oct 28 2019 10:41am
Forum: E-Bike General Discussion
Topic: Home-Built Ebike - Swiss Police Suspect Drugs!
Replies: 32
Views: 4007

Home-Built Ebike - Swiss Police Suspect Drugs!

https://m.20min.ch/schweiz/zuerich/stor ... s-14440938

google translate does a decent job on this if you prefer English. The article mentions he was going up to 45 kph :D
by dozentrio
May 18 2018 1:00pm
Forum: Battery Technology
Topic: Best battery for my flying bike?
Replies: 9
Views: 923

Re: Best battery for my flying bike?

Bike which flies, through the air!

Yes, they're high power requirements. That's why I can't use Multistar, unless I get way more of them than I actually want.

So where can I find a 3 kWh EV battery that can do 35 kw continuous?
by dozentrio
May 18 2018 10:56am
Forum: Battery Technology
Topic: Best battery for my flying bike?
Replies: 9
Views: 923

Best battery for my flying bike?

Hey guys, I've been trying to find a good solution for my flying car battery and honestly can't make up my mind. I don't like to ask for help when I know the information is out there, but hopefully you guys can weigh in. This is not something I can afford to get wrong :D Requirements: -3 to 5 kWh -9...
by dozentrio
Apr 13 2018 1:53pm
Forum: Items Wanted
Topic: Meanwell S-350-24 or 48 volt DC power supply
Replies: 6
Views: 975

Meanwell S-350-24 or 48 volt DC power supply

I need to replace my Meanwell bulk charger and can't find any good sources for the old easy to mod (R33 mod) DC power supplies. Anyone have any of these or know a source?
by dozentrio
Aug 17 2017 10:46am
Forum: E-Bike Technical
Topic: How much regen power is possible?
Replies: 6
Views: 890

How much regen power is possible?

Hi guys, I've tried doing some searching to get an answer to this without much luck. I want to know what the maximum power people are getting in regen from their motor controllers. I know there must be some limits-- overheating of controller fets, overheating of motor... Assuming you can get your mo...
by dozentrio
Apr 13 2017 6:13pm
Forum: Items for Sale - Used
Topic: For Sale: Nissan Leaf Battery modules in FLORIDA :Edit
Replies: 38
Views: 4791

Re: For Sale: Nissan Leaf Battery modules in FLORIDA :Edit

Sorry for my ignorance but, what is the discharge capability of these modules? I am considering 10 or 12 in series for a motorcycle conversion.
*how much current can they provide, peak/continuous...
by dozentrio
Jan 22 2017 12:31pm
Forum: E-Bike General Discussion
Topic: DIY Heated Jacket
Replies: 52
Views: 8148

Re: DIY Heated Jacket

Put them in pairs of 2. Two in series and at 15v (4s) they are still quite warm, but not uncomfortably so. You'll have to figure something out for your fifth one though :D
by dozentrio
Jan 20 2017 7:19pm
Forum: E-Bike Technical
Topic: Extra space for hub phases or cooling
Replies: 4
Views: 837

Extra space for hub phases or cooling

It seems that there's been significant effort put into getting more stuff through the axle of hub motors. Thicker phase wires, mostly, but also potentially liquid cooling. Most efforts focus on machining out the axle. Why not use a larger bearing and modify the side-cover so the bearing will fit? Th...
by dozentrio
Jan 09 2017 1:17pm
Forum: E-Bike Technical
Topic: Generator from brushless motor?
Replies: 2
Views: 594

Re: Generator from brushless motor?

My output RPM can be controlled. I'm saying I can pick a value between 6000 to 8000 RPM and stay relatively close to that. Probably it would be 8000 RPM to maximize power... And yes, I think the frequency will be a big issue. If I'm using an RC motor with something like 10+ poles, at 8000 RPM, I get...
by dozentrio
Jan 08 2017 5:22pm
Forum: E-Bike Technical
Topic: Generator from brushless motor?
Replies: 2
Views: 594

Generator from brushless motor?

Hi guys, I need some help and advice from people with a better grasp on electronics than I have. I'm trying to use a 3-phase brushless motor (RC motor) as a generator for a series-hybrid vehicle and don't know what kind of electronics are best suited for my purpose. I want to use the RC motor to kee...
by dozentrio
Nov 15 2016 10:50am
Forum: E-Bike General Discussion
Topic: DIY Heated Jacket
Replies: 52
Views: 8148

Re: DIY Heated Jacket

I carried my main bike battery in my backpack for a while. At first it was SLA too. I quickly learned that was a bad idea. Even a LiPo pack quickly gets painful. The convenience isn't worth it, definitely at least sling your battery over the front handle-bars in some kind of baggage carrier until yo...
by dozentrio
Nov 07 2016 10:47pm
Forum: E-Bike General Discussion
Topic: Critique this performance velomobile idea
Replies: 196
Views: 33266

Re: Critique this performance velomobile idea

The guy who runs this channel http://www.youtube.com/user/ChrisyLuxembourg aka LOWRACER built a DIY carbon fully faired forced-air cooled hub motor trike. With suspension? I can't remember. But he took down the videos of it. Very sad. I suspect the legality of it was in question. Anyway, maybe you c...
by dozentrio
Nov 07 2016 10:17pm
Forum: E-Bike General Discussion
Topic: What's a good e bike headlight?
Replies: 250
Views: 31383

Re: What's a good e bike headlight?

I have ordered this http://www.ebay.com/itm/Black-Motorcycle-Head-Light-Dual-Sport-for-Ducati-Street-Fighter-Dirtbike-Custom-/360670816180 http://i.ebayimg.com/images/g/~PgAAMXQkcZRkrAV/s-l500.jpg I'll be replacing the two centre bulbs with 12v 3000 lumen (35 watt) LED bulbs. I'll report back on the...
by dozentrio
Nov 07 2016 10:10pm
Forum: E-Bike General Discussion
Topic: Have you owned and off roaded both hub and mid drive?
Replies: 83
Views: 8192

Re: Have you owned and off roaded both hub and mid drive?

My first build was a mid-drive based on a Turnigy 80-100 (130 kv). I had a two stage gear reduction, ran on 50v and 120A (max). I built it on an old but high-quality cross-country mountain bike frame. 5 inches travel in the rear, 3 ish in the front. All builds after that were hub motor bikes because...
by dozentrio
Nov 07 2016 3:31pm
Forum: E-Bike General Discussion
Topic: DIY Heated Jacket
Replies: 52
Views: 8148

Re: DIY Heated Jacket

cycleops612 wrote: (op has a motorbike, 12v), it seems preferable to yet another goddam battery to; buy, charge and fret about.
Actually, here is a photo of my bike. I guess my original post is misleading. It's a 100v Crystalyte 5403 :) I cruise at about 90 kph though so it gets fairly cold.
by dozentrio
Nov 05 2016 5:26pm
Forum: E-Bike General Discussion
Topic: DIY Heated Jacket
Replies: 52
Views: 8148

Re: DIY Heated Jacket

Yeah, I heard about the carbon fiber ribbon right after I ordered these heating pads and the nichrome wire. My friend is going to try something similar using the carbon fiber ribbon. We'll see how it turns out. It does seem simpler and easier that way.
by dozentrio
Nov 03 2016 7:29pm
Forum: E-Bike General Discussion
Topic: DIY Heated Jacket
Replies: 52
Views: 8148

DIY Heated Jacket

It's getting colder here and I plan to try to ride my bike through the winter. I do a short 10-15 minute commute to my uni and I will need something to keep me a bit warmer. My motorcycle jacket isn't insulated very well, but I like the safety aspect of it. Rather than buying a whole new heated jack...
by dozentrio
Nov 01 2016 12:13pm
Forum: E-Bike Technical
Topic: XPD: open-source keywin e-bike lab replacement
Replies: 610
Views: 175124

Re: XPD: open-source keywin e-bike lab replacement

it only works with linux otherwise you need to use the other software. You can get it from powervelocity website I believe. You can also use the android app but you'll need to install a bluetooth programming module in your controller. Powervelocity sells them. I think you could probably make one too...
by dozentrio
Oct 13 2016 9:54am
Forum: General Discussion
Topic: Amberwolf gratitude thread
Replies: 51
Views: 5187

Re: Amberwolf gratitude thread

I haven't really been active in ages, but I know the name Amberwolf and anyone who volunteers their time like this has my respect and gratitude. Sorry to see you go!