Light weight roll cage for street motorcycle streamliner

Started by 4stroke, June 13, 2015, 08:52:50 PM

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4stroke

#30
June 20, 2015, 06:23:25 AM Last Edit: June 20, 2015, 06:28:46 AM by 4stroke
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.

Stan Back

#31
June 20, 2015, 07:23:51 AM
That certainly looks doable.

Please show us a video on fire-up day.
Past (Only) Member of the San Berdoo Roadsters -- "California's Most-Exclusive Roadster Club"

Peter Jack

#32
June 20, 2015, 07:45:28 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

fordboy628

#33
June 20, 2015, 10:53:31 AM
Quote from: Peter Jack on June 20, 2015, 07:45:28 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

And the Can-Am Spyder, sans roll cage.

:cheers:
Fordboy
Science, NOT Magic . . . .

I used to be a people person.  But people changed that relationship.

"There is nothing permanent except change."    Heraclitus

"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former."     Albert Einstein

Stan Back

#34
June 20, 2015, 01:50:30 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"

tallguy

#36
June 20, 2015, 09:44:50 PM
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.

bones

#37
June 30, 2015, 05:15:12 AM
Hey 4stroke
How are you going to get this registered?

Bones
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