flak monkey
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| posted on 3/3/04 at 04:03 PM |
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Complete Chassis Weight
Ummm as title, if anyone wants to know, as i seem to remember people asking a while back.
The weight is for a 'book' chassis with the mods suggested by cymtriks. And it includes the suspension bits  So its the whole thing. The
difference in weight between the modded version and the standard chassis is only a few kg. And the de dion chassis weighs 2kg more.
Hope this helps a few people....has anyone actually weighed a chassis? If so how do your figures compare?
Cheers
David
ignore the cog measurements, they are relative to my axis...which isnt in the right place 
[Edited on 3/3/04 by flak monkey].gif)
Sera
http://www.motosera.com
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Kitlooney1000
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| posted on 3/3/04 at 04:05 PM |
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I know its sad, when i finished the chassis, i jumped on the bathroom scales(out in the shed) with the chassis, worked out that it weighed 45kgs with
out the floor
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flak monkey
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| posted on 3/3/04 at 04:14 PM |
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Sounds about right to me.
That measurment also includes a hefty roll bar (50mm x 2mm thick), the floor (13kg ish) the trans tunnel panneled in (12kg ish), all the suspension
bits (9kg ish). So 45kg will be about right for just a chassis.
David
Sera
http://www.motosera.com
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greggors84
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| posted on 3/3/04 at 04:18 PM |
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When i made a model of the chassis, i made it out of solid bars, i take it you made it out of RHS?
Chris
The Magnificent 7!
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flak monkey
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| posted on 3/3/04 at 04:30 PM |
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I originally made it out of solid, but this afternoon i went back and made it all hollow section yes. It assumes 1.6mm wall thickness on the tubes as
per the book.
David
Sera
http://www.motosera.com
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greggors84
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| posted on 3/3/04 at 05:15 PM |
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What program are you using? I had problems making the bars that were angles in 2 planes, i made new datum planes for some but others i couldnt make
them accurate. The one i had trouble was, was the one with the rear top wishbone bracket.
By the way im using pro e wildfire.
Chris
The Magnificent 7!
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flak monkey
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| posted on 3/3/04 at 05:31 PM |
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I use Pro Desktop 2000i2.
I drew mine in on a new workplane, that took ages to get in the right place (and i think they still miss by about 0.5mm) Thinking about it now i would
have converted my 3d drawing to 2d. Then taken the angles and measurements from that drawing, made the new parts and added them in... didnt think of
that at the time 
Good luck
David
Sera
http://www.motosera.com
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MustangSix
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| posted on 3/3/04 at 06:23 PM |
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without floors, mine was 123lbs (56k), but it is a larger than book version.
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Mark Allanson
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| posted on 3/3/04 at 09:41 PM |
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Mine is (WAS) 55Kg without the floor, book chassis but with some (a lot) of extra strengthening
 
Rescued attachment Chassis Weight.jpg
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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Findlay234
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| posted on 4/3/04 at 11:13 AM |
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My Luego with roll bar and floor was about 90-95 kg. Some of the tubes in the rear are much thicker tho to hold the irs but it all looks about right
to me
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sgraber
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| posted on 4/3/04 at 09:33 PM |
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I know this is comparing apples to oranges, but my middy chassis (which is huge by locost standards) was 112Kg with all paneling.
How does the typical Locost weight compare to the original Lotus design weight? I mean, a Locost looks positively massive compared to the spindly
original!
Steve Graber
http://www.grabercars.com/
"Quickness through lightness"
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I love speed :-P
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| posted on 4/3/04 at 10:50 PM |
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yes but what flat monkey isnt telling u is that he cheated doing his model where as i am going mine the proper way but he now has got the
nose and a scuttle on now
Don't Steal
The Government doesn’t like the competition
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flak monkey
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| posted on 5/3/04 at 12:47 AM |
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OK ok,....i cheated and did it the easy way yes. But it will make no difference to the weight r other measurements you take from it
I now have, bonnet, scuttle, nose cone, front cycle wings and wheels on my picture, see below. But i dont think the nose cone is quite right
somewhere.
Cheers
David
PS spot the stray trailing arm in that pic.... oops (fixed now though)
[Edited on 7/3/04 by flak monkey]
 
Rescued attachment Looking nice, if i do say so.jpg
Sera
http://www.motosera.com
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ed_crouch
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| posted on 6/3/04 at 04:23 PM |
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you have a talent there! And not enough lectures, obviously. Bloody freshers!!
Good model: i understand how long that takes to do: nice one.
Ed.
I-iii-iii-iii-ts ME!
Hurrah.
www.wings-and-wheels.net
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flak monkey
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| posted on 6/3/04 at 05:16 PM |
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Thanks Ed
Its got a full set of panels now the pic is in my photo archive if anyone is interested
I have just spent my evenings working on it...taken quite a while.
Cheers
David
Sera
http://www.motosera.com
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cymtriks
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| posted on 7/3/04 at 03:04 PM |
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Estimated weight
The weight estimate for the complete welded structure, without aluminium panels but with steel panels, as ouput from my analysis is 180 lbs. With all
panels and brackets the weight is probably not far off 200lbs. Almost identical to the 89 Kg estimated in one of the earlier posts in this thread.
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