tobym
|
| posted on 20/9/08 at 07:58 AM |
|
|
Opinions on this Chassis for a V8 Middy
I am researching the possibility of buiding a V8 middy, GT-style car, but don't have much (any!) engineering background, so am researching
different chassis-designs, and found this:
middy chassis
I wondered what you middy engineering expert-types thought of it? What are the good and bad aspects ? etc,
thanks in advance for all of your help,
Toby
[Edited on 20/9/08 by tobym]
|
|
|
|
|
minitici
|
| posted on 20/9/08 at 07:59 AM |
|
|
Correct link!
|
|
|
richardlee237
|
| posted on 20/9/08 at 09:27 AM |
|
|
To try and visulise what forces will be experienced in a complicated structure like a car space frame is difficult.
You need to imagine the chassis as a set of rods all joined together by ball and socket joints and then think what will happen if you try and twist or
bend the chassis.
In the chassis shown there is a big notch (cut out) in the top rail at the middle of the car, which is the point where the bending forces are
greatest. Struturally not good, which is maybe why they say they have used FEA on the back bone. THe roll cage does very little to improve this.
If you are seriously considering a one off or unknown chassis, make a scale model from 3mm square balsa wood, lightly glue it together with pva
adhesive. Use that to see where it is weakest in bending and twisting. Put bits in or take them out and see the effect. An evenings enjoyable work
indoors will tell you a lot .
Richard
Quote Lord Kelvin
“Large increases in cost with questionable increases in performance can be tolerated only in race horses and women.”
Quote Richard Lee
"and cars"
|
|
|
aerosam
|
| posted on 20/9/08 at 11:12 AM |
|
|
Mega expensive!
$15,000!!!!
|
|
|
Werner Van Loock
|
| posted on 20/9/08 at 11:16 AM |
|
|
here's another gt style V8 middy:
DDR_SP8
http://www.clubstylus.be
|
|
|
kb58
|
| posted on 20/9/08 at 02:52 PM |
|
|
quote:
Originally posted by Werner Van Loock
here's another gt style V8 middy:
DDR_SP8
That thing has been "almost ready" for years. The odd thing to me is the list of qualifications of the two creators, One has been
associated with sports car drivers, and "has worked with race cars decorations and promotional vinyl graphic design." The other
guy's qualifications include being "project chef for a large construction company".
So... who chose camber gains and roll centers, who decided whether shock installation ratios were acceptable, and who did structural analysis? I hope
it's the other two names they drop, though I think Irv isn't a designer either, but I could be wrong.
Sorry for the rant, but I always get spun up about stuff like this. Frankly I'm impressed they're honest enough to admit they don't
have any design experience.
[Edited on 9/20/08 by kb58]
Mid-engine Locost - http://www.midlana.com
And the book - http://www.lulu.com/shop/kurt-bilinski/midlana/paperback/product-21330662.html
Kimini - a tube-frame, carbon shell, Honda Prelude VTEC mid-engine Mini: http://www.kimini.com
And its book -
http://www.lulu.com/shop/kurt-bilinski/kimini-how-to-design-and-build-a-mid-engine-sports-car-from-scratch/paperback/product-4858803.html
|
|
|
