Search found 2228 matches

by friendly1uk
Sep 25 2017 5:44pm
Forum: E-Bike Technical
Topic: Any differences between the different PAS units?
Replies: 6
Views: 627

Re: Any differences between the different PAS units?

I'm using the 8 pole sensor with 12 magnet wheel, no problem. The 12 pole pickup won't work with the 8 magnet wheel though. It gives sporadic bursts at just the right separation distance, but it's just too small a gap between magnets. It's an old thread, but I'm just figuring this out and this info ...
by friendly1uk
Aug 16 2016 5:17pm
Forum: E-Bike Technical
Topic: 48v PSU for charging
Replies: 8
Views: 427

Re: 48v PSU for charging

iangreenhalgh wrote:Hi folks
My bike has two 48v 20ah batteries I made from 18650 cells, they are 12s8p so 50.4v fully charged.
That doesn't quite add up. You have 44v batteries.
by friendly1uk
Aug 16 2016 11:52am
Forum: E-Bike General Discussion
Topic: Manufacturing in USA will be cheaper than China by 2015
Replies: 26
Views: 2053

Re: Manufacturing in USA will be cheaper than China by 2015

Well I imagine it kept some long term projects in-house. It's not really going to happen though. If it's not China making things cheaper, It will be somewhere else.
by friendly1uk
Aug 16 2016 11:48am
Forum: E-Bike Technical
Topic: over torquing axle nuts?
Replies: 13
Views: 927

Re: over torquing axle nuts?

Well if that don't promote axle shearing, what will.
The torque washer is backwards.
I would like to see the rest. I'm sure it's entertaining.
by friendly1uk
Aug 08 2016 6:55pm
Forum: E-Bike Non-hub Motor Drives
Topic: What does your bike weigh and what is your overall setup?
Replies: 20
Views: 2224

Re: What does your bike weigh and what is your overall setup

50lb with my lock and stuff. 48v 5Ah and a Bafang CST. A low end starter MTB is 30lb and a 48v 11ah dolphin with built in controller is 20lb so stick a 10lb CST on and you can get 60lb easily. You can save 5lb on bike weight and still be the the budget category. Take away the stock axle and bearings...
by friendly1uk
Aug 07 2016 6:31pm
Forum: E-Bike General Discussion
Topic: You're sitting on your penis
Replies: 125
Views: 15677

Re: You're sitting on your penis

I find the seat needs more rake when it's pushing me along sat upright, than I want for riding it non-assisted. Simply because a seat pushing me along can have an angle that becomes a ski slope when it stops pushing. Our seats have to be less focused towards a single seating position because of this...
by friendly1uk
Aug 06 2016 7:03pm
Forum: E-Bike Technical
Topic: Womens bike vs mens bike for battery mounting.
Replies: 27
Views: 1410

Re: Womens bike vs mens bike for battery mounting.

I can see how a drop in pack could work, using flanges that extend out a bit, to cover the tubes that it sits upon.
by friendly1uk
Jul 30 2016 5:05pm
Forum: Battery Technology
Topic: Choosing the right BMS - Amperage rating
Replies: 10
Views: 1981

Re: Choosing the right BMS - Amperage rating

limited to 60 amps continuous This doesn't quite ring true. The limit isn't generally the continuous. The limit is the max. If your controller is limited to 60A then you don't need a bms any bigger than that. Though it's trip current should be higher. I have a 30A bms. It will do more. With enough ...
by friendly1uk
Jul 23 2016 12:12pm
Forum: E-Bike General Discussion
Topic: Getting the most from 200w - Geared hub vs Mid drive Austral
Replies: 97
Views: 6244

Re: Getting the most from 200w - Geared hub vs Mid drive Aus

You realise the 200w limit is old don't you? While still in effect, you also have the 250W eu regulations running along side. Meaning a 15.5mph limit and no throttle, but 250w average with no peak figure.
by friendly1uk
Jul 23 2016 12:00pm
Forum: E-Bike Technical
Topic: How to wire BMS
Replies: 22
Views: 1577

Re: How to wire BMS

The diagram shows a dotted red line with the annotation "some have this connection". I think OP should have enough mental power to figure out whether his BMS does or doesn't have P+ marked on it. Sometimes it's a small pad away from the main ones. Some do yes, so if he has a P+, does his? Some do, ...
by friendly1uk
Jul 23 2016 7:22am
Forum: E-Bike Technical
Topic: How to wire BMS
Replies: 22
Views: 1577

Re: How to wire BMS

The drawing is confusing, as the charger bit is wrong. The board gets it's own power via the balance wires. So you can get the balance bit done and the board will be working at that. The drawing is correct. What do you think is wrong with it? That isn't his bms. He doesn't have a P+ terminal. We kn...
by friendly1uk
Jul 22 2016 7:43pm
Forum: E-Bike Technical
Topic: How to wire BMS
Replies: 22
Views: 1577

Re: How to wire BMS

The drawing is confusing, as the charger bit is wrong. The board gets it's own power via the balance wires. So you can get the balance bit done and the board will be working at that. Now the board doesn't switch the live wires for the load or the charger. In the drawing, the load(output to controlle...
by friendly1uk
Jul 22 2016 7:30pm
Forum: General Discussion
Topic: Letting people ride your bike- kids/ liability
Replies: 7
Views: 502

Re: Letting people ride your bike- kids/ liability

Having let a drunk crash his bike, a member had it taken away and checked for conformity.
by friendly1uk
Jul 21 2016 9:35am
Forum: E-Bike Technical
Topic: Climbing hills with a voltage multiplier??
Replies: 11
Views: 970

Re: Climbing hills with a voltage multiplier??

It will climb 10% better while each cell supplies as much current. Not a huge difference, but not bad for adding a switch. If 10% more will do. The power from the battery as a whole will remain the same, but losses calculable through voltage drop will be reduced. Presuming all the wiring used is sui...
by friendly1uk
Jul 21 2016 9:17am
Forum: E-Bike General Discussion
Topic: Stuck in Upstate NY need to be Stealth
Replies: 9
Views: 783

Re: Stuck in Upstate NY need to be Stealth

A mid drive will never be stealth. It's a lump under your crank. What else can it be. A lot of gear hubs look like hub motors. As do some dynamo's. If you hide your rear wheel with panniers that hold your batteries and fit a small gear hub to a single speed bike I don't see many circumstances where ...
by friendly1uk
Jul 19 2016 4:11pm
Forum: E-Bike Technical
Topic: Help with Battery specs please
Replies: 13
Views: 875

Re: Help with Battery specs please

If you burn your house down having been told to use RC batteries, you won't be the first to come here and do just that. Nearly all the fires are caused by using RC batteries. This is why at RC meets they are charged outside in flame proof bags. It's not the battery at fault in most cases. It's simpl...
by friendly1uk
Jul 19 2016 12:04pm
Forum: E-Bike General Discussion
Topic: Hanoi police blast student bikers
Replies: 1
Views: 348

Re: Hanoi police blast student bikers

I'm not sure that picture says 90%
by friendly1uk
Jul 19 2016 12:01pm
Forum: E-Bike General Discussion
Topic: OOPS...I tried to post my E-Bike on a MTB forum
Replies: 29
Views: 2345

Re: OOPS...I tried to post my E-Bike on a MTB forum

Most forums are international, and the prevailing international law is 250w. A fair cyclist. Not one that is going to do harm the trails like a motorcycle would, but rather one that will do no more damage that any other bike. The motor just extends a days outing for the less fit, and aids climbing w...
by friendly1uk
Jul 19 2016 7:37am
Forum: E-Bike General Discussion
Topic: How many watts is my motor?
Replies: 18
Views: 951

Re: How many watts is my motor?

Any frame sticker showing conformity?
Motor stickers?
Photo?
by friendly1uk
Jul 18 2016 7:00pm
Forum: E-Bike Technical
Topic: Climbing hills with a voltage multiplier??
Replies: 11
Views: 970

Re: Climbing hills with a voltage multiplier??

In other news, an es user using two packs in series for speed, was seen running them in parallel when he wanted more current than he wished his series packs to be capable of. Such a setup is only likely much good if it's a quick steep accent needing a power level you couldn't expect to run continuou...
by friendly1uk
Jul 16 2016 6:25am
Forum: E-Bike General Discussion
Topic: India’s first crowdfunded electric bike
Replies: 34
Views: 3350

Re: India’s first crowdfunded electric bike

I think they missed the audience. It needs to carry things. Perhaps 3 people. An integral rear rack is a must, and a 12mm shafted motor is going to last a mile under that load on them streets. It needs to be fwd so that folk can protect it. This might drive forward the production of motors that brin...
by friendly1uk
Jul 15 2016 6:30pm
Forum: E-Bike General Discussion
Topic: Best configuration for peddaling at speed?
Replies: 16
Views: 849

Re: Bestconfiguration for peddaling at speed?

You can get an 11-34T freewheel and 52-42-32 chain wheel. That's quite lazy at 30mph

Only one company seems to do the 11T freewheel but they are on most ebike websites
by friendly1uk
Jul 14 2016 6:23pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: 50cc equivalent motor setup help.
Replies: 25
Views: 3375

Re: 50cc equivalent motor setup help.

I don't believe in carrying more battery than needed. They last years anyway. Here we have the longest average commute in Europe with a 25kmh round trip. Which could be done at full power with the above. I don't know where he would keep it. He hasn't built the bike yet. I'm showing him a motor that ...
by friendly1uk
Jul 14 2016 9:38am
Forum: E-Scooter and Motorcycle General Discussion
Topic: 50cc equivalent motor setup help.
Replies: 25
Views: 3375

Re: 50cc equivalent motor setup help.

The 4kg mid wind 500w bpm motor using a 3.5kg dolphin pack with integrated 20A controller will do 44.4kmh on the flat without over heating. The 12ah pack will last 25km at that speed. At 25kmh you will get 65k. You could always carry a spare for when that's not enough.