Endless Sphere

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 ...

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.

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.

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.

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...

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...

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.

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 ...

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.

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, ...

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...

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...

Having let a drunk crash his bike, a member had it taken away and checked for conformity.

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...

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 ...

More current.

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...

I'm not sure that picture says 90%

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...

Any frame sticker showing conformity?
Motor stickers?
Photo?

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...

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...

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

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 ...

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.