Awd Bike

Postby Bigfoot on Wed 23/Nov/16 11:03am

https://www.subaruonline.jp/special/awd_bicycle/

http://forums.nasioc.com/forums/showthr ... ?t=2816735

many years ago Subaru tried to built an AWD bike. It was to heavy. But now they tried it again.

Only 60 bikes will be available, the high end version costs 167.000 Yen (1.500 $) and the weight is only 16,7 kg (technical data)


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Bigfoot
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Re: Awd Bike

Postby EoinC on Wed 23/Nov/16 11:11am

Slightly OT, but AWD bikes have been available in commercial production since 1960...
https://www.rokon.com/bikes/trail-breaker

and have been to the heart of dark adventure...
http://www.motivation-tools.com/adventu ... en_gap.htm
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Re: Awd Bike

Postby dwgknz on Wed 23/Nov/16 11:30am

There must be a better way thats not going to mince your knee, where the drive train is somehow through the down tube and headtube with an external steerer or sslt.

Shirley there's an engineer or welder on here who can advise.
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Re: Awd Bike

Postby dwgknz on Wed 23/Nov/16 11:32am

BTW Rik - here's the project you wanted - how serendipitous
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Re: Awd Bike

Postby Rik on Wed 23/Nov/16 1:51pm

Christini bikes is the best approach I've ever seen



But check out their ATD motocrosser =} http://www.christini.com/ :crazy: :satan:
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Re: Awd Bike

Postby swtchbckr on Wed 23/Nov/16 2:26pm

that fat christini sure looked betterer than the early christini (and nicolai?) bikes of the 90s... Always wondered what they rode like.

and how do they account for the steerage effect, ie, the front wheel travels more distance than the rear (similarly to the need for Diffs and CVs in our 4 wheeled frenemies)
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Re: Awd Bike

Postby Rik on Wed 23/Nov/16 3:06pm

You'd hope there's some sorta clutch mechanism because what happens if you lock the rear on the brakes. :crazy:
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Re: Awd Bike

Postby philstar on Wed 23/Nov/16 4:07pm

Rik wrote:You'd hope there's some sorta clutch mechanism because what happens if you lock the rear on the brakes. :crazy:


it will just act a an extra dis on your front wheel, but that will put a lot of load on the drive mechanism. or they could have a free wheel somewhere so the front can move faster than the back.
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Re: Awd Bike

Postby swtchbckr on Wed 23/Nov/16 9:14pm

So! In watching that vid, am I correct in picking up that the front drive 'cog' had a free wheel. That would allow the front wheel to travel furtherer than the rear, but wouldn't that also mean that it'd only be applying full power when you're traveling in a completely straight line? The rest of the time there'd be a bit of slop
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Re: Awd Bike

Postby Rik on Thu 24/Nov/16 8:31am

Correct - My earlier ignorance was born out of not not listening to the video's sound. He called it a "one way hub"
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Re: Awd Bike

Postby Dougal on Thu 24/Nov/16 10:39am

dwgknz wrote:There must be a better way thats not going to mince your knee, where the drive train is somehow through the down tube and headtube with an external steerer or sslt.

Shirley there's an engineer or welder on here who can advise.


It's been done with geared driveshafts through the head-tube (downside is torque steer), flexible driveshafts (downside is a big snake to the front wheel) and with hydraulics (downside is fluid drag).

The main issue is, there aren't many situations where front wheel assist actually helps. The rest of the time the extra drag is a real nuisance.
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Re: Awd Bike

Postby swtchbckr on Thu 24/Nov/16 11:41am

Rik wrote:Correct - My earlier ignorance was born out of not not listening to the video's sound. He called it a "one way hub"

So in fact, it's not actually a 2 or all wheel drive bike at all, it's an if-you're-lucky part-time (ie, not very often), all wheel drive bike...
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Re: Awd Bike

Postby Dougal on Thu 24/Nov/16 11:51am

swtchbckr wrote:
Rik wrote:Correct - My earlier ignorance was born out of not not listening to the video's sound. He called it a "one way hub"

So in fact, it's not actually a 2 or all wheel drive bike at all, it's an if-you're-lucky part-time (ie, not very often), all wheel drive bike...


Like calling a hilux a 4wd.
Dougal
Member for: 14 years 5 months

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