/n/ - Transportation » Thread #1868763

Stupidly inefficient for a mechanical bike, but I do wonder why e-bikes don't work like this. If it ends up causing a loss in range just fit a bigger battery.

Anonymous

Anonymous Tue 15 Nov 2022 20:08:16 No.1868781 Report

Quoted By: >>1868784 >>1868806

>>1868763
Did OP fall for youtube clickbait? Click here to find out. --->HERE<---

Anonymous

Anonymous Tue 15 Nov 2022 20:16:33 No.1868784 Report

Quoted By:

>>1868781
I'm clicking but nothing happens.

Anonymous

Anonymous Tue 15 Nov 2022 21:35:36 No.1868806 Report

Quoted By: >>1868811

>>1868781
Alee Denham is a very popular autistic vegan alien from New Zealand

Anonymous

Anonymous Tue 15 Nov 2022 22:13:50 No.1868811 Report

Quoted By: >>1868874

>>1868806
Oh, a vegan. Improper diet would explain the lack of cognitive functioning. Also fuck the internet of things (IOT). Its just a way of sneaking spyware into everything. Your fridge, your microwave, your cordless drill and even toasters. Reject this nonsense or lose what little privacy you have left. Fair warning.

Anonymous

Anonymous Tue 15 Nov 2022 23:16:12 No.1868822 Report

Quoted By: >>1869286 >>1869823

>>1868778
because it's a waste of energy to make the pedals into a generator.
>If it ends up causing a loss in range just fit a bigger battery.
>just compensate for a worse design by making it heavier and more expensive
use your head

Anonymous

View Same Google ImgOps iqdb SauceNAO file.png, 2MiB, 1280x960

Anonymous Tue 15 Nov 2022 23:50:20 No.1868828 Report

Quoted By: >>1868836 >>1868874

I can understand the idea, from a pure maintenence point of view, but it really makes no sense. Considering this guy does a lot of bikepacking stuff, weight isn't reall a problem (weight shouldn't be half the issue weenies make it out to be, anyway), but you'd be way better off designing some kind of chain cover than doing this, if what you want is a maintenence free ride.

Anonymous

Anonymous Wed 16 Nov 2022 00:15:33 No.1868836 Report

Quoted By:

>>1868828
>Considering this guy does a lot of bikepacking stuff, weight isn't reall a problem
backwards logic

try touring and the first time you ride up a hill with a loaded bike you'll be considering every possibility to lose weight.

The 'able to lift loaded bike over a fence' line is also extremely nice to achieve.

Anonymous

Anonymous Wed 16 Nov 2022 01:12:08 No.1868851 Report

Quoted By: >>1870047

>>1868763
Pretty retarded idea. A chain, belt, or drive line gives nearly all the energy put in to the wheel. A generator and motor combo would have you peddling like mad and stuck on a slight hill. If you just wanted to peddle like mad, just get an exercise bike to plop down in front of the TV.

Anonymous

Anonymous Wed 16 Nov 2022 03:49:56 No.1868874 Report

Quoted By:

>>1868811
I'm already eating bugs and loving it

>>1868828
Alee is obsessed with Rolhoff and carbon belts

Anonymous

Anonymous Thu 17 Nov 2022 17:47:48 No.1869286 Report

Quoted By:

>>1868822
>just compensate for a worse design by making it heavier and more expensive
Sadly, thats just how it usually is done these days.

Anonymous

Anonymous Fri 18 Nov 2022 14:42:53 No.1869467 Report

Quoted By:

>>1868763
The generator would need to be highly robust but also tight tolerances and high quality bearings, copper and magnets but also serviceable. But then you are getting into an issue of production costs and market.

>>1868772
90% efficiency in a commercial setting with highly specialized generators (high cost too). But more like 60%. Though in the OP, there needs to be a mention of the rating of the generator so I can either nod or laugh.

Anonymous

Anonymous Fri 18 Nov 2022 16:52:08 No.1869485 Report

Quoted By: >>1875091

Imagine OP discovering the cardanic transmission.

Anonymous

Anonymous Fri 18 Nov 2022 19:13:06 No.1869520 Report

Quoted By:

>>1868763
Ew.

Anonymous

Anonymous Sat 19 Nov 2022 22:04:55 No.1869823 Report

Quoted By: >>1869870

>>1868822
Extra battery would be minuscle. Like extra half a pound. Doesn't matter. Just use your head.

Anonymous

Anonymous Sat 19 Nov 2022 23:42:48 No.1869870 Report

Quoted By: >>1870024

>>1869823
>Like extra half a pound.
lol

Anonymous

Anonymous Sun 20 Nov 2022 17:11:29 No.1870024 Report

Quoted By: >>1872152

>>1869870
Do the math...
Let's say you are riding e-bike 2 hours. Legs input power is 105 watts. At 95% mechanical transmission efeciency it's 100 watts at wheel.
Replacing mechanical with electric transmission at 76% efficiency. That 80 watts at wheel with same 105 watts legs input. 20 watts to compensate comes from battery. Over two hours it's 40 wh*h. Single 21700 is about 18 wh*h, so it's 2-3 extra 21700 or 140-210 grams.

Anonymous

Anonymous Sun 20 Nov 2022 20:14:57 No.1870047 Report

Quoted By: >>1870088

>>1868851
What would you have to peddle? Are there significant ongoing costs to be covered with this design? What goods would you peddle while stationary at home on your exercise bike?

Anonymous

Anonymous Sun 20 Nov 2022 23:36:43 No.1870088 Report

Quoted By: >>1870301

>>1870047
Unless you have a built in battery, the electricity to drive the rear motor isn't going to pop out of thin air.

Anonymous

Anonymous Mon 21 Nov 2022 22:10:08 No.1870301 Report

Quoted By:

>>1870088
Yes, but why should there be a need to peddle anything? Presumably you are suggesting this design would put a pecuniary demand on the user by saying such a thing.

Anonymous

Anonymous Mon 21 Nov 2022 23:47:32 No.1870326 Report

Quoted By: >>1875094

Casuals will do literally anything to get bluetooth onto everything.

Anonymous

Anonymous Mon 28 Nov 2022 21:17:18 No.1872010 Report

Quoted By:

Yea, been thinkin about this.
Why not pedal generator to top-off a battery that drives a electric hub motor? And a power meter on the pedals for the e-bike digital brain to know when to go faster.
Hmmm? HMMMMMMM?

Anonymous

Anonymous Tue 29 Nov 2022 04:51:53 No.1872152 Report

Quoted By:

>>1870024
sounds good op except you made up the efficiency of the hypothetical genset and motor and since the input power varies in the city the batteris will be compensating a lot more over 2 hours so you'll need more battery

Anonymous

Anonymous Thu 01 Dec 2022 05:18:48 No.1872589 Report

Quoted By:

>>1868763
>Pedal for 30 minutes while sitting still and storing all the energy in a capacitor
>Hit the boost button

Anonymous

Anonymous Mon 12 Dec 2022 15:11:41 No.1875090 Report

Quoted By:

>>1868763
normally i like that guys channel but he really dropped the ball on this one
just because it could work doenst mean itl be good it sounds awful
how the fuck is converting kinetik energy into electricity to convert it back to kinetic energy supposed to solve anything?
plus no gearing between the cranks and generato or the motor and wheel so thats even less inifficiency
litterally what is this solving?
chains are so efficient and simple they just work

Anonymous

Anonymous Mon 12 Dec 2022 15:15:29 No.1875091 Report

Quoted By:

>>1869485
i tried looking it up but its just driveshafts for buses or something?

Anonymous

Anonymous Mon 12 Dec 2022 15:17:01 No.1875094 Report

Quoted By:

>>1870326
bluetooth was a mistake

Anonymous

Anonymous Mon 12 Dec 2022 15:25:19 No.1875097 Report

Quoted By:

I wonder if you had a generator / motor made with room temperature superconducting magnets if something like that would work. Just need some unobtanium.

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