CUBE EPO german swiss cake

liveforphysics said:
... but a few delivered only mildly-soggy performance for a few minutes before smoking, and that means they do have a place in the world.

Great, hubbies have been upgraded from "crap" to "mildly-soggy" :)

We're making progress.

Unfortunately there are not enough Lebowski's and liveforphysics around for hubbies producers to market megawatts-capable-hubbies at reasonable price and quality.

The market is first composed of city commuters who are bound by 250w pedelec laws and for the most part do not understand/care about the technology involve. They just want to press a button and get there (or pedal and get there).

Then there are the week-end DIY'ers enthusiasts who like to tinker and upgrade and repair and discuss, and sometimes ride, with a bit of luck. And these guys you find them on this forum for example. But that's already not enough people for any serious producer to invest in reliable hubs production.

As for myself, i've got more power than i really need with my gear, way too much probably. What i'm desperate for is RANGE ! I drive in the hills over the week-end and 32km with 1'000 m altitude change is not yet enough. There is always this other hill over there that i would like to climb (and come back home without a collapsed LiPo)
 
Hugues said:
liveforphysics said:
... but a few delivered only mildly-soggy performance for a few minutes before smoking, and that means they do have a place in the world.

Great, hubbies have been upgraded from "crap" to "mildly-soggy" :)

We're making progress.

Unfortunately there are not enough Lebowski's and liveforphysics around for hubbies producers to market megawatts-capable-hubbies at reasonable price and quality.

there are big hubs around, have a look at the Kelly site for heaps of 3-6kw monsters probly at reasonable price and quality, i think john is using one similar? but at 1:1 gearing with the back wheel, unfortunately in the end the only way for more power with a hub is a massive (say 15kg+) motor right at your axle (when the 8kg one already messes up my shit).
and its this, that has me and many others looking for a different way forward (whilst enjoying ones hubs positives in the meantime)

and dont worry about liveforphysics slightly harsh comments, the only thing that really entertains him now is watching others get flung off the back of his massively overpowered, super sensitive throttled machines, and just so you know, his pic in the blue shirt is his instant reaction to another hapless dude left on his back, dazed and shoeless in the dirt. :shock:
 
I've been thinking about this debate for most of my night.

I've had some really good times on hubmotor bikes. JohninCR's bikes with fat scooter hubs rip, and are silent and maintenance free.
That's a damn fine working solution to the same goal we all share here (apply a torque to our rear wheel).

I've had some non-hub bikes that ripped so hard they could instantly flip you, even while burning out on gravel. Or sustain 80+mph speeds around Laguna Seca. But they required work to support, like tearing the hubs out of wheels every 50miles or so.

It seems like its all about trade offs, and a lot is, but then you see a non-hub like lebowskis GF build, and I have to wonder if it simply doesn't get better everything than a similarly powered hub could achieve, and I think the answer is yes.
 
I 100% agree! There is a lot of talk about the "best" or "better" system out there, but the truth as it has been stated is what is best for your use! :)

I have made it my goal to follow the KISS principal as closely as possible, but there is a lot of necessary items to achieve certain goals on a particular type of bike.

If you want the hub motor's equivalent in simplicity and ease of use in a mid-drive, you need look no further than the Stoke Monkey.

I used to not understand the non-freewheeling cranks until I realized that this was for a heavy cargo bike that will have groceries and precious cargo (kids) on the back, so you're not going to be hot-rodding it with kids on the back and heavy cargo loads anyway. It just works. 8)

Hard to beat either design for simplicity and reliability, however, just like any design, the Stoke Monkey has it's limits too, it would never be an ideal platform for a high performance E-Bike, but that isn't the point, do you rail against a diesel pick-up because it can't corner or accelerate like a sports car? Of course not! Each design has it's purpose and a good design does what it was intended to do very well.

I had no Idea about Lebowski's accomplishment! Hats off to you sir! :shock: :twisted: 8)

@ Oatnet, I understand what you are saying, and I hope I haven't come off as a "hub hater" far from it, however for my needs (long distance travel, minimal battery) a mid-drive makes the most sense, and I am not trying to bash hub motors, however, for me, in most instances they just aren't near as practical.

I am in the process of building a hub motored bike to be my "rain bike", a bike that will be used in tandem with the local bus service Trimet while I go to school at UBI, and I will be using that for the simple fact that it has so few things to go wrong, dead simple in it's operation, and still weigh light enough to lift up onto the bus rack. At most it will see about 20 miles of operation between charges.

I will most likely use a MAC or other large diameter geared hub optimized for the hills at the cost of top speed, and hopefully it will be of the "Crank Forward" or semi-recumbent style, as I'm not quite ready for another wedgie bike. :p

I am also building a front hub motor bafang for a friend who has little to no money and needs an E-Assist bike to help him get around, and starting him off with *GASP* SLA batteries. Why? Because he's totally new to the hobby, and I can get some pretty cheap, and even if he does everything wrong, I'm only out a small amount of used batteries, that and he's had several of his bikes stolen, so we are outfitting his BMX because no one looks at it twice, and it will have a very small battery capacity and only used to travel a few miles after it is used with the bus.

If he was more tech savvy, and could afford better, I wouldn't be hesitant to help him use LiPo too, however, in his case, it doesn't make sense yet, it might in the future, but for now a cheap simple 36V system is what the doctor's ordered. :)
 
Lebowski said:
Hugues said:
What i'm desperate for is RANGE !

how about a more efficient motor :mrgreen: that'll give you more range (marginally, but OK)

Exactly! However, a good mid-drive giving you 66% more efficiency over a DD hub motor is more than marginal. :wink:

I started with my first E-Bike in a quest for stealth, light weight and efficiency using a smallish geared hub motor, unfortunately I also wanted more speed, so I bought the wrong motor, next geared hubby will most likely be a MAC or similar large diameter geared hub for a "rain E-bike" :)
 
liveforphysics said:
He made his own motor from scratch, it's a beautiful axial flux motor built from normal household things. Which he uses for, get this, his own brushless controller that he built from SCRATCH, complete with all the programming and an amazing control system and everything.


Ya, ok, but did he mine the magnets?








:twisted:
 
john7700 said:
Ya, ok, but did he mine the magnets?

No, but I did scrape the radium out of a 1000 cheap watches to build my own portable nuclear powerplant. No
dangerous Lipo batteries for me :D

these are my magnets:

http://www.supermagnete.ch/eng/S-25-07-N

28 of these in the current motor, will be upped to 56 at a later stage
 
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