Search found 154 matches

by fourbanger
Dec 10 2018 12:40am
Forum: E-Bike Build Threads / Photos & Video
Topic: Pack build: Sewer Pipe Dynamite Roll
Replies: 2
Views: 192

Re: Pack build: Sewer Pipe Dynamite Roll

Check this out. I originally tried for a different, more friendly six pack configuration, but this is the shape the cells wanted to go for. flower-consciousness copy 19 circles.jpg cci19.gif And this poor bastard has it all figured out... http://hydra.nat.uni-magdeburg.de/packing/cci/cci19.html
by fourbanger
Dec 08 2018 3:12pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Pack build: Sewer Pipe Dynamite Roll
Replies: 2
Views: 192

Pack build: Sewer Pipe Dynamite Roll

Well, for my first pack build I thought I'd make things as difficult as possible for myself so I decided to go with a cylindrical pack using a 4" PVC pipe as a container. Wow. Ok, here goes... IMG_0256.JPG After scratching the terminals with some medium grit, applying the insulation ring around the ...
by fourbanger
Sep 16 2018 10:33pm
Forum: E-Bike Technical
Topic: Sensored or sensorless controllers?
Replies: 18
Views: 1789

Re: Sensored or sensorless controllers?

Holy cow. Pretty good turn around time on the replies for a 6 year old thread, guys. Thanks. One thing I'm a little unsure of now is whether or not a person can run a hub motor backwards at full speed (perhaps using the freewheel side of a DD motor to drive the LEFT side of the rear wheel, for examp...
by fourbanger
Sep 15 2018 11:55am
Forum: E-Bike Technical
Topic: Sensored or sensorless controllers?
Replies: 18
Views: 1789

Re: Sensored or sensorless controllers?

It was actually my understanding that sensorless motors *needed* to have a bit of rolling momentum before throttle could be applied. As such, I'm kind of at a loss as to how a geared hub motor with an internal freewheel can operate sensorless at all...
by fourbanger
Aug 25 2018 10:22pm
Forum: E-Bike Build Threads / Photos & Video
Topic: The Mid Drive Hub Motor Media Group
Replies: 124
Views: 43336

Re: The Mid Drive Hub Motor Media Group

That's pretty wicked. I've been thinking of something along the same lines for some time.. I like how you didn't have to drill all the way through the side plate to get everything locked in place. Looks like you've got enough axle left that you could fit one of those dinky 12t freewheels so you coul...
by fourbanger
Jul 28 2018 7:40pm
Forum: E-Bike Non-hub Motor Drives
Topic: Dome Motors 600W mid drive kit
Replies: 12
Views: 1425

Re: Dome Motors 600W mid drive kit

Groovy. Looking forward to it!
by fourbanger
Jul 28 2018 2:19am
Forum: General Discussion
Topic: how much regen is too much for the battery
Replies: 46
Views: 939

Re: how much regen is too much for the battery

I still myself attracted to the idea of a mid drive setup with a DD hub in back to be used as a "coaster brake", particularly on long descents when heavily laden. The amount of current to the battery could be regulated by a rheostat and a big ass resistor if needed.

???
by fourbanger
Jul 27 2018 1:30pm
Forum: E-Bike General Discussion
Topic: Mystery Bafang Motor.
Replies: 9
Views: 387

Re: Mystery Bafang Motor.

Better tell your friends, then. The MOQ is 20.
by fourbanger
Jul 27 2018 2:23am
Forum: E-Bike General Discussion
Topic: Seeking opinions on my ebike project ideas (noob)
Replies: 9
Views: 559

Re: Seeking opinions on my ebike project ideas (noob)

From the Ruff Cycles web site: "PORUCHO - Toot-f***ing-Toot...imagine yourself as a young storm trooper swaggering that thing at walking pace down Hollywood Boulevard with a fine female spread legged on roller skates over the back wheel grabing firmly with both hands to your oiled up trapezius muscl...
by fourbanger
Jul 27 2018 1:58am
Forum: E-Bike General Discussion
Topic: Mystery Bafang Motor.
Replies: 9
Views: 387

Re: Mystery Bafang Motor.

Probing a little deeper seems to reveal that this is quite likely one of the first incarnations of the BPM motor. Also it just occurred to me, having not too long ago "crossbroken" an earlier model REAR BPM, that it did indeed have a rather oversized stator carrier [EDIT: side cover] bearing, just a...
by fourbanger
Jul 27 2018 1:44am
Forum: E-Bike General Discussion
Topic: Two chains on triple crankset? Gonna rub or not?
Replies: 30
Views: 821

Re: Two chains on triple crankset? Gonna rub or not?

@Markz I'll have to catch up with you on that another time. I'm all over the idea of mid mounted hub motors these days. @MrNotEnglish You could try asking this guy if his bracket will fit the 1016 you have. But doesn't yours come with a foot welded on with four bolt holes? If so, just use U bolts me...
by fourbanger
Jul 24 2018 4:08pm
Forum: E-Bike General Discussion
Topic: Electric bike share program in Longueuil Quebec
Replies: 7
Views: 254

Re: Electric bike share program in Longueuil Quebec

Oh. Well I'm still considering myself partially right in thinking it's a form of integrated theft prevention. HA!
by fourbanger
Jul 24 2018 1:38am
Forum: E-Bike General Discussion
Topic: Electric bike share program in Longueuil Quebec
Replies: 7
Views: 254

Re: Electric bike share program in Longueuil Quebec

There doing something similar out here too. Minus the electric assist, but minus the docking stations too.

Old news now.

https://www.cbc.ca/news/canada/british- ... -1.4292987

Why do they have to look so dorky?
by fourbanger
Jul 24 2018 1:16am
Forum: E-Bike General Discussion
Topic: Mystery Bafang Motor.
Replies: 9
Views: 387

Re: Mystery Bafang Motor.

I made an account on alibaba just so I could ask about it. No response yet but they want to see my 'business card' and I don't know wtf I'm doing.

It is kinda cool though, huh. Just like in the drawings but nothing like anyone actually ever has.
by fourbanger
Jul 23 2018 6:30pm
Forum: E-Bike General Discussion
Topic: Mystery Bafang Motor.
Replies: 9
Views: 387

Re: What motor is this?

Right. I knew that bit. I should probably amend the topic to be a bit more specific.
by fourbanger
Jul 23 2018 3:12am
Forum: E-Bike Non-hub Motor Drives
Topic: Dome Motors 600W mid drive kit
Replies: 12
Views: 1425

Re: Dome Motors 600W mid drive kit

I actually figured as much.... waaaaay after the fact.

I still think someone should buy one of these though.
by fourbanger
Jul 22 2018 9:18pm
Forum: E-Bike General Discussion
Topic: Two chains on triple crankset? Gonna rub or not?
Replies: 30
Views: 821

Re: Two chains on triple crankset? Gonna rub or not?

So, sorry, that first spreadsheet is used to calculate the wheel diameter to be used in the ebikes.ca simulator for mid drive motors?

Is that right?
by fourbanger
Jul 22 2018 9:07pm
Forum: E-Bike General Discussion
Topic: Mystery Bafang Motor.
Replies: 9
Views: 387

Mystery Bafang Motor.

Looks like a BPM but I've never seen one that doesn't have the cable coming out the axle..

Any thoughts?
by fourbanger
Jul 22 2018 9:02pm
Forum: E-Bike General Discussion
Topic: Bike is getting hot
Replies: 8
Views: 302

Re: Bike is getting hot

^ +1
by fourbanger
Jul 20 2018 4:41pm
Forum: E-Bike General Discussion
Topic: Two chains on triple crankset? Gonna rub or not?
Replies: 30
Views: 821

Re: Two chains on triple crankset? Gonna rub or not?

Well for what it's worth. I'm still in the process of building my first ebike, but it sounds like we have a very similar idea of what we want to accomplish. Depending on what kind of motor you're using, there may be the option of driving the LEFT side of the BB with another crankset. The caveat the ...
by fourbanger
Jul 20 2018 12:36am
Forum: E-Bike Non-hub Motor Drives
Topic: Converting a hubmotor to a middrivemotor
Replies: 981
Views: 171025

Re: Converting a hubmotor to a middrivemotor

Hey, mechhead, how is the conversion going so far?
by fourbanger
Jul 17 2018 6:59pm
Forum: E-Bike General Discussion
Topic: Two chains on triple crankset? Gonna rub or not?
Replies: 30
Views: 821

Re: Two chains on triple crankset? Gonna rub or not?

I'm having a hard time telling from the pictures if individual chainrings can be swapped out on the M371 but it looks like they can't. My gut feeling is that you're gonna miss not having access from the big ring to the wheel. An old 10 speed crank set might do you better. You'd only have 1x7/8/9/wha...
by fourbanger
Jun 26 2018 11:57am
Forum: E-Bike Non-hub Motor Drives
Topic: Dome Motors 600W mid drive kit
Replies: 12
Views: 1425

Re: Dome Motors 600W mid drive kit

Derp. I think I knew that and had it backwards.

Note to self: Outrunners have the spinny bit on the outside a la DD hub motor. Inrunners have their hamster wheels inside like the GNG.

There. That seems easy enough to remember. :)
by fourbanger
Jun 24 2018 3:07am
Forum: E-Bike Non-hub Motor Drives
Topic: Dome Motors 600W mid drive kit
Replies: 12
Views: 1425

Re: Dome Motors 600W mid drive kit

Never had one. You say "give them up" with such a sense of permanency. What's wrong with outrunners, if you don't mind my asking?