Search found 324 matches

by wturber
Dec 15, 2017 6:41 pm
Forum: E-Bike General Discussion
Topic: Snapped fork dropouts
Replies: 19
Views: 220

Re: Snapped fork dropouts

I've had a torque arm pratically from day one, and the motor I have no idea who makes it... There is no markings on the hub cover at all. The only thing I know, is that it uses Samson High Power Double Wall Alloy Rims. I live in Ottawa. The picture is of the fork, removed from the bike. I have a di...
by wturber
Dec 15, 2017 3:09 pm
Forum: E-Bike General Discussion
Topic: Got my butt kicked today
Replies: 17
Views: 503

Re: Got my butt kicked today

As to the winter helmet concept: any welding supply store has fleece lined skull cap type hard hat liners, that's my plan as of now. It doesn't get really cold here, but it did drop to 40F a few weeks back. I just put the helmet on over the hoodie that comes with my jacket. It's a sweatshirt like m...
by wturber
Dec 15, 2017 1:05 pm
Forum: E-Bike General Discussion
Topic: OpenEbike - open source frame design
Replies: 26
Views: 458

Re: OpenEbike - open source frame design

I don't think that's a particularly relevant loading simulation for a bicycle. One thing I find interesting though, is the degree of deformation at the ends of the hexagonal design as compared to the triangular design. Give that degree of deformation, I'd expect to see some colored indication of hig...
by wturber
Dec 15, 2017 12:45 pm
Forum: E-Vehicles General Discussion
Topic: Madness. Why such slow penetration for hybrid?
Replies: 65
Views: 1233

Re: Madness. Why such slow penetration for hybrid?

neptronix wrote:
Dec 15, 2017 5:31 am

Hopefully we can get back to a rational discussion here. Jesus... :roll:
Folks need to learn not to feed the trolls. Yes, it is hard to resist the urge to respond, but ignoring them often works well.
by wturber
Dec 14, 2017 9:23 pm
Forum: E-Bike General Discussion
Topic: My solar-assisted custom tricycle FOLLIES
Replies: 1141
Views: 84773

Re: My solar-assisted custom tricycle FOLLIES

Is your motor mounted on the front? If so, I wonder if the axle is secure in the dropouts and torque arms. You could be hearing the motor shift as regen is applied. I'd say that that would be "not good." If there is no motor in the front, then I have no clue about the noise.
by wturber
Dec 14, 2017 4:22 pm
Forum: E-Bike General Discussion
Topic: Araldite as filler between frame and bracket?
Replies: 14
Views: 193

Re: Araldite as filler between frame and bracket?

I'd glue rubber (strip of inner tube) to the inside of the wood; at least that way if you ever need to reconfigure or replace it your frame will be free of araldite that would be a pig to remove. Yeah - I'd go with rubber or even a strip of leather. I used leather (strips from a weight lifting belt...
by wturber
Dec 14, 2017 4:06 pm
Forum: E-Bike General Discussion
Topic: Anyone use fairings? Why not...?
Replies: 34
Views: 913

Re: Anyone use fairings? Why not...?

All said... "facts are", AFAIK, any "fairing" implies MORE "aerodynamic" (less energy needed to "move"/accelerate) and (MY favorite), more comfortable. :wink: Not necessarily more comfortable at all. In Phoenix, you want the wind blowing on you while riding for many months of the year. Also, the an...
by wturber
Dec 14, 2017 3:57 pm
Forum: E-Bike General Discussion
Topic: Rescue Motor - Aotema (Wilderness Energy BD-36)
Replies: 8
Views: 360

Re: Rescue Motor - Aotema (Wilderness Energy BD-36)

Now them thar is what I'd call a set of panniers.
by wturber
Dec 14, 2017 1:14 pm
Forum: E-Bike General Discussion
Topic: Is this torque arm configuration ok?
Replies: 10
Views: 348

Re: Is this torque arm configuration ok?

Or custom make a torque plate that can bolt to your frame directly, or at least have no pivot. This is easier to do than you might think. Set the pivot screw on your ta, then trace it on paper. Cut steel to match the paper. Now you have a TA with no pivot to loosen, and its custom fit to that bike....
by wturber
Dec 14, 2017 12:59 pm
Forum: E-Bike General Discussion
Topic: OpenEbike - open source frame design
Replies: 26
Views: 458

Re: OpenEbike - open source frame design

None of the pictures show on the latest post. Also, I think the point made about the structure are not only generally valid, but also easily determined by looking at the drawing given. As drawn, the design has problems.
by wturber
Dec 14, 2017 9:55 am
Forum: E-Bike Technical
Topic: Using the Wangdd22 1500W 30A DC Boost Converter on an ebike
Replies: 91
Views: 2314

Re: Using the Wangdd22 1500W 30A DC Boost Converter on an ebike

wturber wrote: ↑ Wed Dec 13, 2017 12:32 pm The 30A version has two coils. I think there's more to it than a different heat sink. I agree that the designs seem similar to myself as a layperson. Hmmmm..............I have 2 of those 30 amp Wangs and neither has two coils. The single coil does have 2 c...
by wturber
Dec 13, 2017 9:22 pm
Forum: E-Bike General Discussion
Topic: Anyone use fairings? Why not...?
Replies: 34
Views: 913

Re: Anyone use fairings? Why not...?

It points out that upright bike riders are the most conformist people in the world. Nah. Sure, cyclists will follow silly trends and fads just like any other group. Heck, that's what people, in general, do. But the trends don't succeed for very long unless there a good perceived cost/benefit ratio....
by wturber
Dec 13, 2017 4:44 pm
Forum: E-Bike General Discussion
Topic: Anyone use fairings? Why not...?
Replies: 34
Views: 913

Re: Anyone use fairings? Why not...?

Back in the 1990's, this guy used to ride in many of the IHPVA races. http://4.bp.blogspot.com/_LWGcbKlwPjU/TC9EoHK-YsI/AAAAAAAAATY/m19YKJC-tAA/s1600/R1-+7A.jpg It seemed like the most practical, effective upright fairing going. If so, then its commercial success (or lack of such) points out the ra...
by wturber
Dec 13, 2017 3:02 pm
Forum: E-Bike Technical
Topic: Using the Wangdd22 1500W 30A DC Boost Converter on an ebike
Replies: 91
Views: 2314

Re: Using the Wangdd22 1500W 30A DC Boost Converter on an ebike

eCue wrote:
Dec 13, 2017 2:26 pm
I will try the 1200w enclosure version its about the perfect size for the 350w motor if it gets hot can add a 2nd and 3rd fan and a few heatsinks to the chips , be nice to get its spec rating.
I'd expect that to work fine for a 350w motor.
by wturber
Dec 13, 2017 1:28 pm
Forum: E-Bike Technical
Topic: Using the Wangdd22 1500W 30A DC Boost Converter on an ebike
Replies: 91
Views: 2314

Re: Using the Wangdd22 1500W 30A DC Boost Converter on an ebike

The 30A version has two coils. I think there's more to it than a different heat sink. I agree that the designs seem similar to myself as a layperson. I read an article somewhere on the design of boost converters. Never fully understood it but if I remember correctly, the capacity of the converter i...
by wturber
Dec 13, 2017 12:32 pm
Forum: E-Bike Technical
Topic: Using the Wangdd22 1500W 30A DC Boost Converter on an ebike
Replies: 91
Views: 2314

Re: Using the Wangdd22 1500W 30A DC Boost Converter on an ebike

Yes. 85% efficiency may be too great of a loss to suffer in this application. I hadn't noticed that. The 20A 1200w version looks like its the same electrical design as the 30A version.they actually look identical. ? Its ;like they added heat sinks to the 20A version and boom its now a 30A booster , ...
by wturber
Dec 12, 2017 6:11 pm
Forum: E-Bike Technical
Topic: Using the Wangdd22 1500W 30A DC Boost Converter on an ebike
Replies: 91
Views: 2314

Re: Using the Wangdd22 1500W 30A DC Boost Converter on an ebike

You can set a current limit with the 30A booster. But if the controller limits you to 11A, then I don't see why you'd need to set it. OTOH, if you don't expect a future need for more amperage, then it makes sense to get the lower rated device. It might even make sense to get one of the devices that ...
by wturber
Dec 12, 2017 4:24 pm
Forum: E-Bike Technical
Topic: Using the Wangdd22 1500W 30A DC Boost Converter on an ebike
Replies: 91
Views: 2314

Re: Using the Wangdd22 1500W 30A DC Boost Converter on an ebike

Putting together a case for the Wagndd22 1500 w 30a booster would be pretty easy if you can handle a hacksaw, epoxy and a drill. I intend to do that at some point.
by wturber
Dec 12, 2017 11:02 am
Forum: E-Bike Technical
Topic: Using the Wangdd22 1500W 30A DC Boost Converter on an ebike
Replies: 91
Views: 2314

Re: Using the Wangdd22 1500W 30A DC Boost Converter on an ebike

It's been tried over the years with a few different methods, with varying degrees of success, but most of them weren't cheap, or not easy to use. So, thank you all for doing this work. :) Necessity is the "mother of ... " and all that. I gave this a go mostly because I just didn't want to spend a l...
by wturber
Dec 10, 2017 3:09 am
Forum: E-Bike General Discussion
Topic: Cute Q100 lightweight builds slow mtb, fast road
Replies: 284
Views: 33492

Re: Cute Q100 lightweight builds slow mtb, fast road

In keeping w/ this idea, it seems to me that starting at the bottom in PAS 1 (if that is what he is doing), might not be the best technique for a truely steep hill. Starting slow on low power isn't going to get one that far. It seems to me, hitting the bottom in pas 5 and pedaling like heck and tog...
by wturber
Dec 08, 2017 7:39 pm
Forum: E-Bike General Discussion
Topic: OpenEbike - open source frame design
Replies: 26
Views: 458

Re: OpenEbike - open source frame design

- ultra light - we use honeycomb structure to reduce mass Those honeycomb spacers might look cool; but they are not triangulated and will flex in plane and could shear under high stress or impact. Yes. I thought that the lightweight honeycomb structure used in aerospace were typically sandwich stru...
by wturber
Dec 08, 2017 4:09 pm
Forum: E-Bike General Discussion
Topic: Cute Q100 lightweight builds slow mtb, fast road
Replies: 284
Views: 33492

Re: Cute Q100 lightweight builds slow mtb, fast road

I guess the other thing I might mention is, remember to never let the climbing speed fall below half of the top speed, which, in your case, would be around 10 to 12 mph. If you hit a hill where you can feel the motor start to "lug-down", it's time to jump off and walk up. I assume that's so the mot...
by wturber
Dec 08, 2017 1:51 pm
Forum: E-Bike General Discussion
Topic: Cute Q100 lightweight builds slow mtb, fast road
Replies: 284
Views: 33492

Re: Cute Q100 lightweight builds slow mtb, fast road

Great info. Can you post a link to the carbon bars from Amazon? I'm betting it is one of these. I have this or something nearly identical and find it very handy. https://www.amazon.com/MaxMiles-Accessories-Handlebar-Extension-Flashlight/dp/B076BH88YB/ref=sr_1_4?ie=UTF8&qid=1512759044&sr=8-4&keyword...
by wturber
Dec 08, 2017 12:52 pm
Forum: E-Bike Technical
Topic: Using the Wangdd22 1500W 30A DC Boost Converter on an ebike
Replies: 91
Views: 2314

Re: Using the Wangdd22 1500W 30A DC Boost Converter on an ebike

FWIW, I did try to do a run last night direct to the battery but with the batter at 39 volts, but the battery sagged below the controller's 38v cuttoff and I couldn't really get going. It might be possible to do this with a fresh 42v charge.
by wturber
Dec 07, 2017 8:44 pm
Forum: E-Vehicles General Discussion
Topic: Madness. Why such slow penetration for hybrid?
Replies: 65
Views: 1233

Re: Madness. Why such slow penetration for hybrid?

Concerning oil companies: "How does a billion-dollar company pay no taxes?" https://www.nytimes.com/2017/03/09/business/economy/corporate-tax-report.html OTOH ... https://www.forbes.com/sites/christopherhelman/2012/04/16/which-megacorps-pay-megataxes/#1399422f5586 Of course, it is always important ...