Search found 5857 matches

by Chalo
Feb 21, 2018 3:47 am
Forum: Motor Technology
Topic: Ferrofluid for hub cooling? BS or real?
Replies: 23
Views: 517

Re: Ferrofluid for hub cooling? BS or real?

If the motor runs too hot, it's too small or you're demanding too much power from it. This isn't rocket science; we've had boringly reliable electric motors for more than a century. Use enough motor for the job and you'll have no problem.
by Chalo
Feb 21, 2018 2:35 am
Forum: E-Bike Non-hub Motor Drives
Topic: new cyclone 3000 w mid-drive kit?
Replies: 2861
Views: 217205

Re: new cyclone 3000 w mid-drive kit?

Single speed or steel cassette? or a modified cassette to adjust the chainline etc? Definitely using a multi-speed cassette will improve durability and service life, with a few conditions: - Don't shift under motor power - Do shift among different gears to distribute wear and adjust for different r...
by Chalo
Feb 21, 2018 2:26 am
Forum: E-Bike Non-hub Motor Drives
Topic: Has anyone ever blown a IGH hub?
Replies: 21
Views: 1084

Re: Has anyone ever blown a IGH hub?

Sourcing a replacement is proving... Problematic. Contact Aaron's for replacement IGH parts: http://www.rideyourbike.com/internalgears.shtml Email: aaron@rideyourbike.com Aaron Goss is a close friend of mine. He and I were in the same bicycle club in Seattle. We've taught each other a lot of things...
by Chalo
Feb 21, 2018 12:41 am
Forum: E-Bike Non-hub Motor Drives
Topic: Has anyone ever blown a IGH hub?
Replies: 21
Views: 1084

Re: Has anyone ever blown a IGH hub?

Take heed about Sturmey Archer parts: Sturmey gearhub axles are not the same size as Sachs/SRAM gearhub axles. As in 13/32"x 26tpi versus M10.5x1.0. (Unless it's M10.5x26tpi, which is dumb but not out of the question.) Anyway, the holes in the keyed washers might fit just peachy, or might not. I gue...
by Chalo
Feb 20, 2018 2:05 am
Forum: E-Bike Non-hub Motor Drives
Topic: Has anyone ever blown a IGH hub?
Replies: 21
Views: 1084

Re: Has anyone ever blown a IGH hub?

Bike has 20" wheels and a SRAM Dual drive 2, that appears have a textured washer where I'd expect something with a lug. The wheels where rebuilt before the bike came my way, so I'm wondering if something got lost along the line. I think the Dual Drive came with serrated washers, but you can grab up...
by Chalo
Feb 19, 2018 2:37 pm
Forum: E-Bike General Discussion
Topic: cable operated hydraulic brakes
Replies: 33
Views: 400

Re: cable operated hydraulic brakes

Curious what you didn't like about the levers, I notice they are offered in 2 finger and 4 finger levers, I'm leaning towards the 4 finger for more lever to grab in a jam. At the time I had mine, there was just one kind of lever, long bladed and pretty straight. It looked and felt cheap. I like a l...
by Chalo
Feb 19, 2018 2:01 pm
Forum: E-Bike General Discussion
Topic: cable operated hydraulic brakes
Replies: 33
Views: 400

Re: cable operated hydraulic brakes

Magura rim brakes will definitely give a lever feel that's similar to a hydraulic disc brake, if that's what you're using for the other brake. You can choose from among several pad compounds to match the braking response to your other brake, too.
by Chalo
Feb 19, 2018 1:04 pm
Forum: E-Bike Reviews & Testing
Topic: Yescomusa.com 500 & 1000 watt 48v rear kit review
Replies: 199
Views: 35974

Re: Yescomusa.com 500 & 1000 watt 48v rear kit review

Multi-speed freewheels are one place where it really pays to use Shimano rather than an off brand. For me, SunRace is a distant second choice and the others like DNP and Falcon are just not worth using.
by Chalo
Feb 19, 2018 12:55 pm
Forum: E-Bike General Discussion
Topic: cable operated hydraulic brakes
Replies: 33
Views: 400

Re: cable operated hydraulic brakes

I have a couple bikes with rim brakes and have been thinking about trying one of the Magura Hydraulic Rim Brakes that are like the downhillers used to use. Anyone have any experience with them? I had a pair in the early '90s. They were very strong and precise. I stopped using them mostly because I ...
by Chalo
Feb 18, 2018 9:12 pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 1638
Views: 34862

Re: Wind and Solar vs Coal, Gasoline, Nuclear

California had another great day of sun. The panels peaked at 70% of capacity from 09:30 to 16:00. And it is winter here. Almost looks a little too ideal with a flat plateu. Maybe there was a voltage conversion or transmission current capacity somewhere along that maxed out? Or a contractual maximu...
by Chalo
Feb 18, 2018 6:37 pm
Forum: E-Bike Non-hub Motor Drives
Topic: Belt or Sprocket Adapters ???
Replies: 36
Views: 3981

Re: Belt or Sprocket Adapters ???

I am now trying to fit a freewheel sprocket at the left side of my back wheel and then bolt an 80 tooth sprocket, so I can coast without dragging the motor. That's how I set up my own first e-bike many years ago. I used a RH/LH threaded BMX hub, but I made a longer multi-speed axle for it. I made a...
by Chalo
Feb 18, 2018 4:55 pm
Forum: E-Bike General Discussion
Topic: Critique this performance velomobile idea
Replies: 172
Views: 17130

Re: Critique this performance velomobile idea

I sometimes wonder whether an inflatable streamliner fairing-- built like a segmented air mattress--would offer a maximum of benefit at a minimum of cost and weight. I imagine a stowable one made of ripstop nylon and PVC, or a semirigid one made of PET. I've always imagined fabric with flexible sup...
by Chalo
Feb 18, 2018 12:12 am
Forum: E-Bike General Discussion
Topic: Stealth & quick-ish e-bike for short commute, opinions
Replies: 20
Views: 570

Re: Stealth & quick-ish e-bike for short commute, opinions

Do keep in mind that compared to a rigid rear end, mechanical suspension always, without exception, adds: - weight - frame flex - cost - maintenance - points of failure You can decide these tradeoffs are worth it, but that doesn't make them go away. I think that above 25 mph or so on the street, sus...
by Chalo
Feb 17, 2018 11:36 pm
Forum: E-Bike General Discussion
Topic: cable operated hydraulic brakes
Replies: 33
Views: 400

Re: cable operated hydraulic brakes

In my observation in the shop, at least nine in ten of the cable brakes that have serious problems could be fixed in the field with simple tools by someone who understood them. But maybe one in ten of the hydraulic brakes with failures could have been fixed without workshop resources. A larger porti...
by Chalo
Feb 17, 2018 9:59 pm
Forum: E-Bike General Discussion
Topic: cable operated hydraulic brakes
Replies: 33
Views: 400

Re: cable operated hydraulic brakes

Prob the biggest advantage on hydraulic brakes is they self adjust as the pads get thinner from wear, so the lever feel is always the same until it's time for new pads. Mechanical disc can stop just as well, but takes periodic readjustment to keep from feeling mushier and mushier as the pads thin o...
by Chalo
Feb 17, 2018 3:59 pm
Forum: E-Bike General Discussion
Topic: cable operated hydraulic brakes
Replies: 33
Views: 400

Re: cable operated hydraulic brakes

BTW, I thought one of the main advantages of hydraulic brakes was that they reduced slop in the system. Running a cable to a hydraulic caliper would take away that advantage and reduce effectiveness. It restores a choice of lever shape and mechanical advantage that you don't get with end-to-end hyd...
by Chalo
Feb 17, 2018 1:13 pm
Forum: E-Bike General Discussion
Topic: Stealth & quick-ish e-bike for short commute, opinions
Replies: 20
Views: 570

Re: Stealth & quick-ish e-bike for short commute, opinions

Rear hub on a 7 speed beach cruiser with a built in rear rack. hide the motor under pannier bags. Throw oil on it and ride it on the dirt, and then don't wash it. Or paint it with a brush. It won't look worth cutting the lock on it. Kitty litter bucket panniers. Not only are they supremely useful, ...
by Chalo
Feb 17, 2018 1:04 pm
Forum: E-Bike General Discussion
Topic: Looking for a chromoly rear rack, any suggestions?
Replies: 13
Views: 273

Re: Looking for a chromoly rear rack, any suggestions?

The widely available chromoly steel racks are those from Tubus and from Surly. The Tubus Cargo has better bracing, but it is optimized for carrying panniers. Surly racks have big wide rack tops and would be great for mounting battery packs and/or controllers. All Tubus and Surly racks are expensive ...
by Chalo
Feb 17, 2018 2:38 am
Forum: E-Bike Non-hub Motor Drives
Topic: new cyclone 3000 w mid-drive kit?
Replies: 2861
Views: 217205

Re: new cyclone 3000 w mid-drive kit?

I repaired two more 3000W motors today that had bad Hall sensors, one with a rotten rear bearing as well. Got them running as good as new. I opened one more short stack motor that was burned so badly it was like a stinky dusty ashtray in there-- so no saving that one. Even the bearings were burned. ...
by Chalo
Feb 16, 2018 3:08 am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 1638
Views: 34862

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Looks like they need more PV solar.
by Chalo
Feb 16, 2018 2:19 am
Forum: E-Bike Technical
Topic: Melting wires
Replies: 44
Views: 726

Re: Melting wires

According to the datasheet, a properly crimped PP45 single pole connector, with 10 gauge wire carrying continuous 45 amps will heat up 40 degrees C in open air. Yeah, too bad they don't crimp onto 10ga wire worth a damn. In my experience, they go reasonably well onto 12ga wire, and fatter than that...
by Chalo
Feb 15, 2018 8:14 pm
Forum: E-Bike Technical
Topic: MAC motor controller?
Replies: 21
Views: 708

Re: MAC motor controller?

I've ordered a 24V 500W Unite brushless motor controller to see if that will turn this uselessly fast hub into something appropriate. Half the voltage and a quarter of the wattage should make it do what it was intended to do. If the timing is wrong or there's some other deal breaker, well I only hav...
by Chalo
Feb 15, 2018 4:31 pm
Forum: E-Bike Technical
Topic: Melting wires
Replies: 44
Views: 726

Re: Melting wires

For what it's worth, my oldest and most used power connectors are crimped with cheap crappy tools and then soldered. Zero problems with those. On the other hand, the pedicab fleet I work with has had recurrent connector overheating issues with 45A Powerpoles that were carefully crimped using Powerpo...
by Chalo
Feb 15, 2018 3:18 pm
Forum: General Discussion
Topic: Pain in the neck and back, wrong frame size?
Replies: 8
Views: 208

Re: Pain in the neck and back, wrong frame size?

Currently i am in the market for new light weight bicycle 15 pounds, so road bicycle is the number one choice, [...] My ride style is commuting, i am doing food delivery on a bicycle, i don't care much about, top speed and aerodynamics, These two things are absolutely inconsistent with each other. ...
by Chalo
Feb 14, 2018 3:57 pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 1638
Views: 34862

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Thorium reactors do have the major disadvantage (in terms of government support) that they don't produce any nuclear weapons materials as byproducts. Neither do light water reactors. In fact, they take enriched uranium and turn it into contaminated less-enriched uranium. Those contaminants you ment...