smart51
|
| posted on 29/11/09 at 07:07 PM |
|
|
back bone chassis
I know back bone chassies can be very stiff in torsion but isn't there a risk that they'll bend so that the wheels on one side are closer
together than the other?
This particular car has a metal frame in the body tub for crash / rollover / side impact protection.
 
Rescued attachment F16 chassis front.jpg
|
|
|
|
|
speedyxjs
|
| posted on 29/11/09 at 07:13 PM |
|
|
Nice pic but i wouldnt be too happy having a crash in that, even if the body is 'safe'
How long can i resist the temptation to drop a V8 in?
|
|
|
iank
|
| posted on 29/11/09 at 07:29 PM |
|
|
I wouldn't even call that one a backbone. More two subframes connected by a small tube. A real backbone is much larger in cross section and
often triangulated.
Like this:
or:
So in answer to your question, it depends on the strength of the backbone, but it's unlikely in a properly designed one while still being more
likely than in a decent spaceframe/monocoque. In the one you show the body is going to have to be a decent monocoque to avoid it.
[Edited on 29/11/09 by iank]
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
|
|
|
britishtrident
|
| posted on 29/11/09 at 09:08 PM |
|
|
Nearly all backbone chassis are really only part of the structure the body stiffens them a lot.
The only backbone chassis I can think of that didn't transfer any chassis loads the body was the Triumph Herald.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
|
|
|
blakep82
|
| posted on 30/11/09 at 01:09 AM |
|
|
here's aproper backbone chassis
that other one looks like it'll twist all over the place. i wouldn't go near it
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
|
|
|
t.j.
|
| posted on 30/11/09 at 07:01 AM |
|
|
quote:
Originally posted by smart51
I know back bone chassies can be very stiff in torsion but isn't there a risk that they'll bend so that the wheels on one side are closer
together than the other?
This particular car has a metal frame in the body tub for crash / rollover / side impact protection.
The upper ball-joint mounting - wishbone looks tiny to me!
Please feel free to correct my bad English, i'm still learning. Your Dutch is awfull! :-)
|
|
|
MikeRJ
|
| posted on 30/11/09 at 12:16 PM |
|
|
quote:
Originally posted by t.j.
The upper ball-joint mounting - wishbone looks tiny to me!
Stupendously under-engineered, much like the chassis IMO. I can't believe that is a finished design?
Perhaps the designer is planning for any slight wheel loadings to simply tear off the wheel before the entire chassis folds in half like a book?
|
|
|
Benonymous
|
| posted on 1/12/09 at 09:50 AM |
|
|
The front and rear sub-frames are going to be able to apply a huge amount of torsion to that wimpy "backbone". As it stands, I
wouldn't even call that a chassis either. If the body is substantial and rigidly bolted to the sub-frames it might be OK but here in Australia
the finished chassis would be subjected to a torsion test and the metalwork we see here would fail that miserably. I like the Lotus Europa backbone,
even though they rusted like bastards!
|
|
|
Daddylonglegs
|
| posted on 1/12/09 at 10:03 AM |
|
|
No way would I even consider getting in that! 
I reckon a few miles around where I live and the potholes would destroy it in minutes!
It looks like the Midget is winning at the moment......
|
|
|
