Author Topic: Light weight roll cage for street motorcycle streamliner  (Read 16233 times)

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Offline 4stroke

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Re: Light weight roll cage for street motorcycle streamliner
« Reply #30 on: June 20, 2015, 09:23:25 AM »
I have decided the best design for low frontal area and safety will be recumbent reverse trike.  I won't need a roll cage since I'll design it to have a low enough center of gravity (also improving frontal area).  I am now trying to figure out a strong light weight frame and the suspension.  I'd like to get the vehicle weight under 100kg but lower the better for acceleration.

« Last Edit: June 20, 2015, 09:28:46 AM by 4stroke »

Offline Stan Back

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Re: Light weight roll cage for street motorcycle streamliner
« Reply #31 on: June 20, 2015, 10:23:51 AM »
That certainly looks doable.

Please show us a video on fire-up day.
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Offline Peter Jack

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Re: Light weight roll cage for street motorcycle streamliner
« Reply #32 on: June 20, 2015, 10:45:28 AM »
Just for your information you've just reinvented the Morgan 3 wheeler. It worked well for a long time. Modern technology should improve it. You may also want to Google Elio.

Pete

Offline fordboy628

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Re: Light weight roll cage for street motorcycle streamliner
« Reply #33 on: June 20, 2015, 01:53:31 PM »
Just for your information you've just reinvented the Morgan 3 wheeler. It worked well for a long time. Modern technology should improve it. You may also want to Google Elio.

Pete

And the Can-Am Spyder, sans roll cage.

 :cheers:
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Offline Stan Back

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Re: Light weight roll cage for street motorcycle streamliner
« Reply #34 on: June 20, 2015, 04:50:30 PM »
It looks to me that the helmet replaces the roll cage.  Might need some reinforcement.
Past (Only) Member of the San Berdoo Roadsters -- "California's Most-Exclusive Roadster Club" -- 19 Years of Bonneville and/or El Mirage Street Roadster Records


Offline tallguy

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Re: Light weight roll cage for street motorcycle streamliner
« Reply #36 on: June 21, 2015, 12:44:50 AM »
I think you're going to have to compromise quite a bit.  You can't have extremely
light weight, extremely great crash protection, and extremely great performance
all at the same time.

I hope some of the ideas others have posted in this thread are "sinking in" . . .

Regarding good fuel mileage, you could research what Doug Malewicki did.  He
has a nice website that describes/shows a street-legal motorcycle that was
demonstrated in California quite a while ago.  Its fuel economy was quite
impressive.  Yeah, there were also some compromises.  For example, no
"jackrabbit" starts.  Doug used to sell plans for building a similar vehicle.  I
don't know whether he still does, though.

And by the way, I used to have a (totally stock, unmodified in any way) Honda 50
that got about 200 miles/gallon.  It wasn't very fast, and had no heavy roll cage.

Offline bones

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Re: Light weight roll cage for street motorcycle streamliner
« Reply #37 on: June 30, 2015, 08:15:12 AM »
Hey 4stroke
How are you going to get this registered?

Bones