Search found 7729 matches

by Chalo
Aug 11 2011 5:53pm
Forum: Battery Technology
Topic: OK to mix capacity in parallel string?
Replies: 11
Views: 1026

Re: OK to mix capacity in parallel string?

So what's an adequate way to test cells before charging or discharging them? Just test the cell voltage as shipped, or is there much more to it than that? Moreover, since charging or cycling them voids HK's warranty, is there any recourse for the buyer once a cell is conclusively determined to be ba...
by Chalo
Aug 11 2011 5:25pm
Forum: EBike General Discussion
Topic: Ebike Folding Mirror
Replies: 8
Views: 614

Re: Ebike Folding Mirror

I like the Third Eye handlebar end mirror so well that I modified my 1100cc motorcycle's bars to accept them. They don't vibrate at all, they have a real glass wide angle mirror, and they mount out wide enough to see around my broad bulk. And the price is appealing. http://www.jensonusa.com/store/pr...
by Chalo
Aug 11 2011 4:03pm
Forum: Battery Technology
Topic: Low voltage limit for LiFePO4 packs?
Replies: 17
Views: 10601

Re: Low voltage limit for LiFePO4 packs?

Thanks, auraslip and Gordo, for your prompt replies. In the FAQ here about lithium polymer batteries, someone says their depth of discharge should be limited to 80% for long cycle life. I have seen no such recommendation about LiFePO4 batteries, but it stands to reason that conservative depth of dis...
by Chalo
Aug 11 2011 1:20pm
Forum: Battery Technology
Topic: Low voltage limit for LiFePO4 packs?
Replies: 17
Views: 10601

Low voltage limit for LiFePO4 packs?

Hi y'all, I have been building e-bikes since the '90s, but this is my first venture into lithium battery land. I am as baffled now as I was back then trying to decode Heinzmann motor specs. Here's the context of my battery question: I'm electrifying a kick scooter for a dear friend of mine. I have s...
by Chalo
Aug 10 2011 1:11am
Forum: EBike Build Threads
Topic: Evolution of Skill....
Replies: 311
Views: 51038

Re: Evolution of Skill....

This front fork is crapola. I don't know if it is going to twist less once I torque everything down, but with all my weight on the bike, when appyling the front brak (6 piston gator, 203mm rotor) I can actually see the fork legs twist at the axle.... :? Considering I am looking to break the 50mph b...
by Chalo
Aug 10 2011 12:54am
Forum: EBike General Discussion
Topic: NuVinci Harmony (automatic transmission for ebikes)
Replies: 2
Views: 504

Re: NuVinci Harmony (automatic transmission for ebikes)

The N171 can handle all kinds of power. It's cheap now, too, since its slimmer, more glamorous sister showed up.

Chalo
by Chalo
Aug 09 2011 11:21pm
Forum: EBike General Discussion
Topic: 150mm dropouts
Replies: 12
Views: 3111

Re: 150mm dropouts

Is there a bike frame that has 150mm dropouts that does not cost 3000$ (norco DH, intense...etc):evil: Stretching my 135mm to me is not a good idea :( I stretch 110mm bikes to 135 frequently (steel frames, to be clear). That's 25mm wider. Stretching a steel 135mm frame to 150mm (15mm wider) should ...
by Chalo
Aug 09 2011 2:20pm
Forum: EBike Non-hub Motor Drives
Topic: semi-serious 20inch racing build
Replies: 76
Views: 15392

Re: semi-serious 20inch racing build

You need a left hand freewheel, or what?

Chalo
by Chalo
Aug 08 2011 8:26pm
Forum: EBike General Discussion
Topic: My First Build is a Success!
Replies: 19
Views: 2893

Rim brakes can easily outperform discs

Sorry but i just don't agree. I have a steep 5 mile hill to ascend and descend. I could not find a front rim brake / pad that does the job like my front avid BB7 + 180mm rotor. In a word, it was terrifying knowing that your rims are smoking hot and your brake power is continuing to fade and you hav...
by Chalo
Aug 08 2011 2:09pm
Forum: EBike General Discussion
Topic: Would you ride with 1 missing spoke?
Replies: 26
Views: 2831

Re: Would you ride with 1 missing spoke?

Not a bad idea to get ahold of a few replacement spokes, so you can have em when you need em. Should be able to scavenge spokes for the non motor wheel from bent wheels in a lbs dumpster. On the other hand, you can get DT Swiss straight gauge spokes, in the exact length you need, brand new and with...
by Chalo
Aug 08 2011 2:00pm
Forum: General Discussion
Topic: [nearly original] An update on what I know from my end
Replies: 311
Views: 27482

Re: An update on what I know from my end

Joshua, Remember that you're talking about a forum "owner" (in quotes because the meaning of that term is slippery in this context) charging rent to the folks who, for lack of a better analogy, wrote all the stuff in the library and made it worth visiting. When I pay a subscription fee for...
by Chalo
Aug 08 2011 2:22am
Forum: EBike General Discussion
Topic: Cheap/old motorcycle to rent for a bit for CA license?
Replies: 4
Views: 496

Re: Cheap/old motorcycle to rent for a bit for CA license?

I recommend taking a Motorcycle Safety Foundation course. They'll provide the (tiny, non-threatening) bike, and your completion certificate substitutes for the DMV skills test. It's a good deal.

Chalo

EDIT: See? Others agree. I guess I could have read ahead a bit and saved my $0.02 worth.
by Chalo
Aug 08 2011 2:10am
Forum: EBike General Discussion
Topic: My First Build is a Success!
Replies: 19
Views: 2893

Re: My First Build is a Success!

You will probably find that a front disc brake is a must on that bike. It may involve a fork upgrade. Surly forks are great. I am 250lbs so i need the extra braking. Maybe your situation is different tho. As a roughly 350 pound car-free rider who has daily ridden e-bikes and pushbikes at body weigh...
by Chalo
Aug 08 2011 1:25am
Forum: EBike General Discussion
Topic: Would you ride with 1 missing spoke?
Replies: 26
Views: 2831

Re: Would you ride with 1 missing spoke?

Each unsupported span between spokes pulling to the same side of the hub can be thought of as a lever with which to bend the rim sideways (out of true) or outwards (out of round). The longer the lever, the larger the stress on the rim from the same external loads. So the smaller the number of spokes...
by Chalo
Aug 07 2011 11:49am
Forum: EBike Build Threads
Topic: Ben's 2011 Big Dummy Build
Replies: 11
Views: 5003

Re: Ben's 2011 Big Dummy Build

Why in the world do you have an idler on the taut side of the chain? The Big Dummy doesn't require an idler at all, let alone one on the powered side like an ill-conceived recumbent abomination.

What's the deal?

Chalo
by Chalo
Aug 06 2011 12:27pm
Forum: General Discussion
Topic: What happened to Dogman?
Replies: 21
Views: 1906

Re: What happened to Dogman?

Yeah, I read it. If the forum starts to look like that, I'll be out of here, too. So far, it hasn't. He could end up doint something like the ratrodbikes.com site, which does have some discreetly placed ebay adds off to the side, but is otherwise an excellent site. I don't begrudge the guy for want...
by Chalo
Aug 05 2011 10:06pm
Forum: General Discussion
Topic: [nearly original] Open Letter to Endless Sphere Community
Replies: 397
Views: 32672

Re: Open Letter to Endless Sphere Community

Also, StudEbiker, idk if it's new (I don't remember noticing it before, but that doesn't necessarily mean anything), but I found the last quote in your sig quite appropriate to the situation. ;) "You can ignore reality, but you can't ignore the consequences of ignoring reality." - Ayn Ran...
by Chalo
Aug 05 2011 2:44pm
Forum: General Discussion
Topic: [nearly original] Open Letter to Endless Sphere Community
Replies: 397
Views: 32672

Re: Open Letter to Endless Sphere Community

This is stating the obvious, but sometimes one must state the obvious: If you have written posts here that are important to the e-bike body of knowledge, that by themselves are significant to you and/or others, be sure you have copies on your own computer that you can repost elsewhere if necessary. ...
by Chalo
Jul 30 2011 9:34pm
Forum: EBike Technical
Topic: Phase cable upgrade with magnet wire
Replies: 106
Views: 12860

Re: Phase cable upgrade with magnet wire

Personally, I doubt that magnet wire will withstand normal abrasion and flex for long. I'd use Teflon jacketed milspec-type wire if I were trying to cram too much wire through too small a conduit. That stuff is nice and the insulation is thin and durable. Silver plating is a dream to solder. Remembe...
by Chalo
Jun 25 2010 2:33pm
Forum: EBike Technical
Topic: High torque velomobile
Replies: 109
Views: 15856

Re: Simple torque formula?

I just looked up in my Morse bearing and chain book, #40 chain at 100 rpm and a 16 tooth drive sprocket will handle .65 hp at 100 rpm and will handle 1.2 hp at 200 rpm. Ordinary bicycle chains, even the thin 10- and 11-speed kinds, handle surges of several horsepower every day (usually with a bigge...
by Chalo
Jun 25 2010 2:49am
Forum: EBike Technical
Topic: Bearings. All you could ever wish to know about...
Replies: 29
Views: 8087

Re: In a world of broken links...

A kick scooter with large diameter bike wheels and pneumatic tires would ride better and faster yet-- but if that were going work for you, you might want to consider just riding a bike, right? Wrong, actually. The fold up scoots go lots of places pedal bikes cannot. Up and down the aisles of the gr...
by Chalo
Jun 24 2010 12:17pm
Forum: EBike Technical
Topic: Bearings. All you could ever wish to know about...
Replies: 29
Views: 8087

Re: In a world of broken links...

Lowering your handlebars usually makes a noticeable difference in cruising speed and top speed. Explain how this helps on a foot bike (stand-up kick scooter)? The next most important factor is tires. If your tires have any tread blocks on them, or are thick for puncture resistance, or have stiff ca...
by Chalo
Jun 24 2010 5:57am
Forum: EBike Technical
Topic: Bearings. All you could ever wish to know about...
Replies: 29
Views: 8087

Re: In a world of broken links...

... while the "Bones Ceramic skate bearings 608" were (supposedly) near state-of-the-art in 2008 at $12 each today sites like skates.com still offer them in batches of 16 at $12.50ea and inlinewharehouse.com at 16 for $11.25 ea... Token is still offering their EX-TYPE BB with Tiramic® Se...
by Chalo
Feb 10 2010 12:34pm
Forum: EBike Technical
Topic: Two Brakes or not Two Brakes that is the question
Replies: 25
Views: 1894

Re: Two Brakes or not Two Brakes that is the question

Oh by the way Bunga-- I identified a problem for you but I didn't identify a solution. Here's one: There is a gadget called a Problem Solvers Travel Agent that can multiply or demultiply cable travel by about 2:1. If you use one of those inline with your V-brakes, they'll make peace with any non-V b...
by Chalo
Feb 10 2010 12:13pm
Forum: EBike Technical
Topic: Two Brakes or not Two Brakes that is the question
Replies: 25
Views: 1894

Re: Two Brakes or not Two Brakes that is the question

Umm Chalo what's with the cat on your head? If you say what cat I'l know your a fan of Terry Pratchett. LOL That's my useless Ragdoll cat Woxy. He's both permanently bothered, and can't be bothered. if you know what I mean. He makes a pretty warm headdress. I don't have a lot of pictures of myself,...