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Learning how to build Lotus Seven replicas...together!
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 Post subject: not another BEC middy
PostPosted: Wed Jul 29, 2009 12:06 pm 
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I've been thinking of building a haynes roadster, even bought the book and read from cover to cover 4 or 5 times but I just found a picture of something I really like.Tried to use sketchup to mock up something like,turns out I really suck at that sort of thing,there must be some on the forum who is good at CAD modelling who might be interested in rendering (is that the word?) something similar ,maybe even more practical .as an incentive we could name the plans after you,hey you could be the next mcsorley famous but not rich(not that I know his bank balance) :D anyone willing to take a bite?
[img][img][/img][/img]


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PostPosted: Thu Jul 30, 2009 7:23 am 
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It might be beautiful, but look at the the drive line angle, and where is the roll center??

I think it is one of those "it looked good on paper"

My 2 cent Dave W


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PostPosted: Thu Jul 30, 2009 10:30 am 
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All I see is rear view and a bare bones chassis so I can't see enough to tell if it might be beautiful or anything else about it.

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PostPosted: Thu Jul 30, 2009 10:36 am 
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And lousy torsional rigidity.

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PostPosted: Fri Jul 31, 2009 1:01 am 
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Man of Constant Hazard
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Dig them sneakers.

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...nowadays people are so intellectually lazy and lethargic that they can't build ANYTHING with their hands. They'll spend hours watching whiny people marooned on an island, but won't spend a second adding anything to the world. -weconway
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PostPosted: Fri Jul 31, 2009 5:52 am 
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I Googled up some info...and pics

Image
Quote:
Sunbeam Tiger Concept is a 2 seater sports car inspired by 1925 Sunbeam Tiger Land Speed Record car, and designer Ryan Skelley is a design student of Coventry University creates it to celebrate the centenary of the original Sunbeam (1925-2025) Now it is only 2009? The Sunbeam Tiger is powered by electric engine, 0- 60 mph in 2.3 seconds, top speed at 160mph and a single charge for 800 miles. The Tiger Concept is made of eco materials, including recycled aluminum tubular chassis, soy foam seats with Biofabric, vegetable oil resin body panels. Check out another picture after the jump.

Image
Found at....
http://www.thednalife.com/2009/04/sunbe ... 1920s.html

Image
Image
Found at ......
http://www.carbodydesign.com/gallery/20 ... oncept/14/

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PostPosted: Fri Jul 31, 2009 10:22 am 
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Quote:
The Sunbeam Tiger is powered by electric engine, 0- 60 mph in 2.3 seconds, top speed at 160mph and a single charge for 800 miles.


*yawn* I designed a car in jr. high school that would do 0-60 in 2.1 seconds, max out at 170 knots, and was solar-powered. We didn't have CAD back then, so I just made a few sketches instead.

-dave "BTDT" hempy

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...nowadays people are so intellectually lazy and lethargic that they can't build ANYTHING with their hands. They'll spend hours watching whiny people marooned on an island, but won't spend a second adding anything to the world. -weconway
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PostPosted: Fri Jul 31, 2009 10:46 am 
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Look at the inclination of the front upper A-arm!

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PostPosted: Fri Jul 31, 2009 10:49 am 
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KB58 wrote:
Look at the inclination of the front upper A-arm!


So? He's just in the meat of the camber gain curve. :P

It's a track only car

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PostPosted: Fri Jul 31, 2009 11:24 am 
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Always Moore!
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I'm digging the styling.

KB58 wrote:
Look at the inclination of the front upper A-arm!


Short instant centers aren't unheard of. You will just get larger values of camber gain versus a suspension with longer instant centers. I'm more curious about the rear geometry and what is driving it.

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PostPosted: Sat Aug 01, 2009 11:15 am 
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Don't rear end anybody while driving it unless you want to be decapitated! That nose gets pretty low. I think the front upper arm angle was a styling constraint to keep the nose so low. There are always compromises I guess.


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PostPosted: Sat Aug 01, 2009 12:21 pm 
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Okay...I gotta admit, I'm oddly attracted to those tires. I got to thinking about painting the treads of my street tires. Drive them a little and the contact area would go back to black, leaving highlights in the grooves.

Speaking of grooves...I googled for "rubber paint" to see what might be appropriate. O M G. I think I sprained my humor when I scanned down to the 4th or 5th search result. After two minutes of uncontrollable laughter, my lovely wife came in to see what trouble I was in, and then she couldn't stop laughing either. So for the love of God, do yourself a favor and PLEASE DO NOT google for rubber paint.

And just to add some relevant content, the front suspension doesn't bother me. Looks like the belly pan has a built-in bump around 1.5". As Chuck cited (I think) Chapman, "Any suspension will work if you don't let it."

-dave

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...nowadays people are so intellectually lazy and lethargic that they can't build ANYTHING with their hands. They'll spend hours watching whiny people marooned on an island, but won't spend a second adding anything to the world. -weconway
Visit my [Locost 7 build log]


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PostPosted: Sat Aug 01, 2009 1:26 pm 
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Image

Does that remind anyone else of a handheld vacuum with wheels?

Dave, I found these for motorcycles, there's probably a car version somewhere on the internets:
http://www.cycletires.com/t1_50_50.htm


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PostPosted: Sat Aug 01, 2009 8:29 pm 
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dhempy wrote:
Okay...I gotta admit, I'm oddly attracted to those tires. I got to thinking about painting the treads of my street tires. Drive them a little and the contact area would go back to black, leaving highlights in the grooves.

This type of tire actually exists. The manufacturers put dye in the rubber in certain areas. Makes colored smoke from what I'm guessing, plus you can "mark" your enemy's territory I suppose, if I cared about such things.

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Kimini book: Designing mid-engine cars using FWD drivetrains, http://www.kimini.com/book_info/


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PostPosted: Sun Aug 02, 2009 7:13 am 
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Quote:
Does that remind anyone else of a handheld vacuum with wheels?


The drawing scream dustbuster

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