Search found 7729 matches

by Chalo
Apr 23 2021 2:07pm
Forum: Bike Mechanical & Structural
Topic: 8020 Aluminum Recumbent Frame?
Replies: 7
Views: 264

Re: 8020 Aluminum Recumbent Frame?

I prefer Lubegard Bio-Tap cutting fluid to chlorinated oils like Tap Magic or A-9. Bio-Tap works great on all common metals and washes off quickly with water. For aluminum, both Dawn dish detergent and WD40 work excellently, so there's little reason to spend extra in that case. Machining operations ...
by Chalo
Apr 23 2021 1:39pm
Forum: EBike General Discussion
Topic: Bafang front wheel Uber motors - which controller
Replies: 84
Views: 2272

Re: Bafang front wheel Uber motors - which controller

The Fork or dropouts are STEEL, the entire piece is steel, I put a magnet all over it and it sticks! A front motor mounted in a cheesy pogo stick fork like that will clap out the fork bushings very quickly. On the plus side, ruining such a nasty fork so you have to replace it is actually doing you ...
by Chalo
Apr 23 2021 12:03pm
Forum: Bike Mechanical & Structural
Topic: 8020 Aluminum Recumbent Frame?
Replies: 7
Views: 264

Re: 8020 Aluminum Recumbent Frame?

Recommending use of a dull cutting tool is one of the strangest things I've heard on the forum. Yes aluminum and brass drill differently because they are softer and more ductile, so significantly higher rpm than used to drill steel is recommended. Sharp tools work best on aluminum (with adequate lu...
by Chalo
Apr 23 2021 11:35am
Forum: Bike Mechanical & Structural
Topic: Tire failure modes.
Replies: 19
Views: 686

Re: Tire failure modes.

I'm with MarkZ and Zerodish. Flats are a real pain in the butt on ebikes with substantial batteries and motors. You have a motor, so just use tires made for motor vehicles. So what if it adds a few pounds and a couple extra pennies a day in electricity. It's definitely worth it to me, even if the o...
by Chalo
Apr 23 2021 10:25am
Forum: EBike General Discussion
Topic: Bafang front wheel Uber motors - which controller
Replies: 84
Views: 2272

Re: Bafang front wheel Uber motors - which controller

The Fork or dropouts are STEEL, the entire piece is steel, I put a magnet all over it and it sticks! A front motor mounted in a cheesy pogo stick fork like that will clap out the fork bushings very quickly. On the plus side, ruining such a nasty fork so you have to replace it is actually doing you ...
by Chalo
Apr 22 2021 9:50am
Forum: EBike General Discussion
Topic: 27.5” front 26” rear - Wheelbuilding
Replies: 111
Views: 3160

Re: 27.5” front 26” rear wheel

E-HP wrote:
Mar 20 2021 4:05pm
has nothing to do with the freewheel. it's how the axle flats are cut.
If you don't have enough room between the freewheel thread root and the axle shoulder, you can't use a multi-speed freewheel.
by Chalo
Apr 19 2021 10:47am
Forum: EBike General Discussion
Topic: What motor windings would you go with?
Replies: 21
Views: 510

Re: What motor windings would you go with?

R0ckStar wrote:
Apr 19 2021 10:27am
So to get a middle ground a 3.5T or a 4T would be the way to go to get an 'all-rounder' machine?
My method is to use the slowest winding that gives me the top speed I want, so I can use a cheaper controller, take it easy on my battery, and get optimum real world efficiency.
by Chalo
Apr 19 2021 10:11am
Forum: EBike General Discussion
Topic: What motor windings would you go with?
Replies: 21
Views: 510

Re: What motor windings would you go with?

At the moment the default winding on the motor is 2.5T which I am guessing is super torquey but lacking on high speed and I think a 2.5T can reduce the lifespan of the battery? but I can ask to get the motor customized for a different winding, say 4T or 5T 2.5T is a high speed winding, 4T or 5T wil...
by Chalo
Apr 19 2021 9:37am
Forum: EBike Technical
Topic: Looking for a kit match for a particular battery
Replies: 12
Views: 236

Re: Looking for a kit match for a particular battery

And if it is the case, can anyone recommend a rear hub conversion kit that will work with the battery I described? Looking for a product link preferably. https://www.ebay.com/itm/48V-36V-17A-Controller-For-250W-350W-Brushless-Motor-Ebike-Electric-Bicycle/353290930607 Combine one of these with one o...
by Chalo
Apr 18 2021 6:59pm
Forum: EBike General Discussion
Topic: Looking to build an eBike
Replies: 12
Views: 463

Re: Looking to build an eBike

RV'ers and aeroplane fliers maybe into small folding 20" bicycle. You wouldnt know when their riding around and I dont see many around when I am riding but I do see them more closer to downtown so add condo's to the list. Oh and dont forget sailboat owners. By "suitcase bike", I don'...
by Chalo
Apr 18 2021 4:17pm
Forum: EBike General Discussion
Topic: Looking to build an eBike
Replies: 12
Views: 463

Re: Looking to build an eBike

Would the frame I linked in my first post be ok to start with? Once I have the frame I can start planning how I am going to fit the battery and BMS (and everything else) I don't see why not. Suitcase bikes don't seem to vary as much in quality as traditional bikes, so as long as you get one with a ...
by Chalo
Apr 18 2021 2:51pm
Forum: EBike General Discussion
Topic: Looking to build an eBike
Replies: 12
Views: 463

Re: Looking to build an eBike

Yeah, suitcase bikes like that aren't for pedaling. It's awkward and non-intuitive to do so when you're riding one. They're even heavier than they must be to support so much motor and battery, and not nearly as strong as their weight would suggest. Riding one with pedal power only is something you'd...
by Chalo
Apr 18 2021 10:30am
Forum: EBike General Discussion
Topic: Looking to build an eBike
Replies: 12
Views: 463

Re: Looking to build an eBike

If you put a big heavy battery pack like that on your bike, you won't pedal it enough to get meaningful exercise. A fat heavy powerful e-bike discourages vigorous pedaling. You may think you'll do it, but you'll quickly fall out of the habit because pedaling doesn't really make any difference. Pedal...
by Chalo
Apr 18 2021 1:04am
Forum: Battery Technology
Topic: is there a prob in this battery diy plan with prebuid case?
Replies: 41
Views: 1702

Re: is there a prob in this battery diy plan with prebuid case?

So why are you planning to use vape pen cells instead of cells that match the application?


Image
by Chalo
Apr 18 2021 12:58am
Forum: EBike Build Threads
Topic: leaning trike cargo bike front end kit
Replies: 181
Views: 33094

Re: leaning trike cargo bike front end kit

So what's the advantage over a two wheeled cargo bike, to justify the extra expense, weight, inefficiency? https://richmondcyclecentre.co.uk/wp-content/uploads/2018/01/surly-big-dummy-1000x1000.jpg http://www.ev-solutions.co.uk/wp-content/uploads/2018/06/358-bakfiets-2017-001-cargobike-short-classic...
by Chalo
Apr 17 2021 7:18pm
Forum: EBike Build Threads
Topic: leaning trike cargo bike front end kit
Replies: 181
Views: 33094

Re: leaning trike cargo bike front end kit

do you know how much it will cost? I do! More than a two wheeler that does the same thing. One of the main goals of engineering is to meet the project's requirements with a minimum outlay of money and resources. So the question is, what is the requirement here? I suspect the purpose was specificall...
by Chalo
Apr 17 2021 11:55am
Forum: General Discussion
Topic: Lightweighting and aerodynamic optimization of a subcompact car.
Replies: 80
Views: 1759

Re: Lightweighting and aerodynamic optimization of a subcompact car.

That's remarkable efficiency for a street legal car. I'm a little surprised that you can't buy a car with this kind of simple but effective improvements directly from the manufacturer. Given that you can get "sports", "racing", and "off road" packages for vehicles that ...
by Chalo
Apr 17 2021 9:18am
Forum: EBike General Discussion
Topic: Giant cruiser budget build
Replies: 99
Views: 12507

Re: Giant cruiser budget build

over three trips my average has been 33.2 whr/mi. This is with speeds in the 20-25 range and about 50% pedaling time. It still seems a bit high, and I'm starting to think that the cheapo controller is a major factor. I really doubt it; there's negligible difference in efficiency between the cheapes...
by Chalo
Apr 16 2021 11:03am
Forum: Motor Technology
Topic: Yamaha develops 496-horsepower motor for electric hypercars
Replies: 20
Views: 682

Re: Yamaha develops 496-horsepower motor for electric hypercars

Why not? I guess drivers aren't stupid and antisocial enough with the way-too-much horsepower they already have. Do us all a favor and stop vehicle shaming on a forum devoted to electric vehicle development. This is the wrong place for it. I see you doing this all across the forum... and even on my...
by Chalo
Apr 15 2021 3:12pm
Forum: EBike General Discussion
Topic: new eZip motor
Replies: 6961
Views: 547000

Re: new eZip motor

If you can get good concentricity, alignment, strength, and wear life out of your 3D printed design... well let's just say I'll be very surprised. Chain is stronger, easier, more fault tolerant, and just works better, but you can't manage to get that working right. I'm skeptical that you would succe...
by Chalo
Apr 14 2021 11:15am
Forum: EBike General Discussion
Topic: new eZip motor
Replies: 6961
Views: 547000

Re: new eZip motor

I am desperate as sick and tired of chain drives. I know belt is smoother and better and no chain issues with alignment. Most everyone has recommended that your chain drives were much more trouble than they are worth. Belt drive will not change that, because it's even more sensitive to setup and al...
by Chalo
Apr 14 2021 11:03am
Forum: General Discussion
Topic: Lightweighting and aerodynamic optimization of a subcompact car.
Replies: 80
Views: 1759

Re: Lightweighting and aerodynamic optimization of a subcompact car.

passenger mirror You have gone from ridiculous to dangerous. Could be you are real talented at neck twisting to see what is happening over at the right. What happens when someone else drives your car and kills themself or someone else because they didn't see something? You dealing with a 3000 pound...
by Chalo
Apr 13 2021 12:05pm
Forum: EBike General Discussion
Topic: Anybody buy the Ebikeling 3,000 watt 45mm kit ?
Replies: 26
Views: 1083

Re: Anybody buy the Ebikeling 3,000 watt 45mm kit ?

3000W with rim brakes? weld a mount for a disc brake Good rim brakes kick ass. Lame disc brakes don't. It isn't a simple matter of swapping one for the other. Disc brakes well hydraulic disc brakes are superior in every aspect. You're wrong, and all you're demonstrating is that you haven't tried ve...
by Chalo
Apr 13 2021 11:28am
Forum: EBike Build Threads
Topic: leaning trike cargo bike front end kit
Replies: 181
Views: 33094

Re: leaning trike cargo bike front end kit

do you know how much it will cost? I do! More than a two wheeler that does the same thing. One of the main goals of engineering is to meet the project's requirements with a minimum outlay of money and resources. So the question is, what is the requirement here? I suspect the purpose was specificall...
by Chalo
Apr 13 2021 11:23am
Forum: EBike Troubleshooting
Topic: Overvolting 24V hub controller.
Replies: 2
Views: 428

Re: Overvolting 24V hub controller.

Low powered mass market controllers like that are so cheap that the best way to find out is to try it. If it pops, then you know, and you get another one. But it's a potted controller, so nobody can see any of the components to make an educated guess about it.