DIY Hybrid technology?

[They_all_do_that_sir]

Not sure if this belongs in here or in the open forums......

 

Basically I keep coming back to the idea of building a (relatively) lightweight hybrid motorcycle along the following lines:

 

* Based on something small like a CB125 / 250

 

* Hub motor which could be mounted either on the front or rear wheel

 

* batteries mounted somewhere on the frame, maybe custom pannier boxes?

 

This is all theory as I'm too skint to anything about it just now. Its probably pointless as well but it would certainly end up being shite.

 

There's a lot to consider on top of all that. Do you go full hybrid where the batteries can be charged by the bikes engine, the motor can be used as a power assist and you get regenerative braking?

Or do you make it a crude independent system you manually switch between?

 

Big bikes will have the engine capacity to pull along the weight of the battery etc but will need a mahoosive hib motor suited to the weight, whereas a smaller bike will be easier to adapt something like an electric bicycle motor (you can get 500w jobs!) but will struggle with all the weight

 

DISCUSS LIKE F**K

[Faker]

Awesome ideology my friend! Is this all at the drawing board stage? Or have you acquired any of the components?

[Faker]

I'd use the electrically assisted pedal cycle as a base, and try to develop a small petrol means of charging on the move..

 

But really what the fuk do I know!

[M'coli]

You can buy 1000w hubs:

https://www.amazon.co.uk/Electric-1000W-Conversion-Including-Batteries/dp/B00I0SHKXO

[barefoot]

Could you not fit a completely MASSIVE starter motor and drive about on that, through all the gears ...

until you reached the open road & turned on the fuel tap?

[Asimo]

The only good reason to go with a hub motor is to give the bike 2WD.

Better to start a project for an electric only bike, get that working and then add the petrol engine for hybridness later.

Hybrid = heavy. Sidecar full of Leaf batteries?

[SiC]

Could you not fit a completely MASSIVE starter motor and drive about on that, through all the gears ...

until you reached the open road & turned on the fuel tap?

Starter motors are only rated for running for short periods. Run it for 30-60 seconds and it'll start burning up.

[pshome]

why not 100% Electric? Looks easy enough to DIY.

 

http://www.dailymotion.com/video/x198i69_new-james-may-s-toy-stories-the-motorcycle-diary_shortfilms

[They_all_do_that_sir]

Awesome ideology my friend! Is this all at the drawing board stage? Or have you acquired any of the components?

 

due to mahoosive financial black hole no components have been sourced.......once I have recovered from Christmas I'll start picking bits and pieces up but its very much a long term project.

 

Obviously I'll need to create some sort of plan first......

 

You can buy 1000w hubs:

https://www.amazon.co.uk/Electric-1000W-Conversion-Including-Batteries/dp/B00I0SHKXO

 

I seen those, and even better on ali express you can get 3000w ones with sprocket mount on one side and disc mount on the other and a freewheel function so when running on the petrol motor you aren't having to turn the electric motor.

 

Ideally I see this as something that would have the following modes:

 

1) Standard hybrid, where its electric only to around 20mph then switches to petrol only.

 

2) Petrol only when the battery is dead

 

3) Combination of both for OMG performance

 

Another question is does it need to have the ability to charge the batteries while running on petrol? Maybe a plug in hybrid is a better bet as charging a big battery using a small motorcycle engine will be a challenge.

[They_all_do_that_sir]

why not 100% Electric? Looks easy enough to DIY.

 

http://www.dailymotion.com/video/x198i69_new-james-may-s-toy-stories-the-motorcycle-diary_shortfilms

 

I think with hybrid its more about the tinkering and messing about making it work which is the draw for me. In the real world with a 20 mile return commute 100% electric makes far more sense though!

[Dave_Q]

1000w is 1.34 horsepower so even your 3000w motor is approx the same power as a 50cc moped.

 

I think its a GR12 idea but you'll probably only be able to carry enough batteries to go a mile or two, slowly.

[They_all_do_that_sir]

1000w is 1.34 horsepower so even your 3000w motor is approx the same power as a 50cc moped.

 

I think its a GR12 idea but you'll probably only be able to carry enough batteries to go a mile or two, slowly.

 

This is a lot more expensive than I thought:

 

http://ev-propulsion.com/motorcycle-hub-motors.html

 

But 30kw peak, 10kw continuous........

[Dave_Q]

10kW is in line with what a standard 125 motorbike would have.

 

How much battery would you need to carry? I reckon you'd be limited to 40-50kg to avoid a significant performance penalty.

[pshome]

Those lipo E-Bike packs look promising. they give you a KW for almost an hour.

 

https://www.alibaba.com/product-detail/48v-20ah-LiPo-battery-For-1000w_60536754213.html

https://www.alibaba.com/product-detail/Factory-supply-high-capacity-48v-13ah_60440352490.html

[garethj]

I almost completely agree with your idea of an electric, personal vehicle.  A motorbike has the wonderful advantage of filtering through traffic, being easy to park and a real hoot to ride.

 

I probably wouldn't start with a motorbike though.  A motorbike puts the rider in that position because it's derived from a bicycle and you need to be able to push your weight down on the pedals.  The drawback is that it makes the centre of gravity quite high and for aerodynamics it's all a bit rubbish.

 

I'd start with something that looks more like this

 

If you can improve the aerodynamics then you can get by with less motor power which needs less battery power.  I'm just surprised that there aren't more electric motorbikes around to be honest.  BMW make a 2 wheel version of the Tesla with bonkers acceleration but there's not much between that and a few 50cc equivalents.

[garethj]

Mad British bloke buys Czech scooter brand and creates an electric version.

 

http://cezeta.com/type506.php

 

 

A bill of materials would be a handy thing to have.

[forddeliveryboy]

I had a go in a velomobile this summer and it was ace, but its low aspect made you feel vulnerable, despite bright colours and flag on a pole. 25-40mph on the flat easily, some electric supplementary power would be awesome. 

 

[Jifflemon]

[gordonbennet]

Starter motors you say, jeez thats brought back some memories.

 

I mackled a starter motor and car battery in to drive my little lads pedal driven go kart, it went like buggery for about 60 seconds by then the battery was flat, after about half a dozen runs it ripped the drive wheels apart, i should have found a different less power hungry motor.