garage19
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| posted on 13/4/05 at 12:25 PM |
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Chassis stiffness improvements?
http://www.ultimav12.ca/
Check out the chassis mods section.
Plenty of fuel there for the old argument for panelling the tunnel in aluminium to gain stiffness in the chassis!
"Covering the outside of the framewith 1.2 mm aircraft aluminum. 8100 ft/lbs/deg. to 8800 ft/lbs/deg"
Also notice the extra stiffness the engine bay cross brace makes!
Surely not too hard to make as a bolt on extra?
A chap posted some pics up recently of his very tasty rolling chassis locost with a nice bay cross brace.
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locoboy
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| posted on 13/4/05 at 12:31 PM |
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That was Liam IIRC 4x4 locost????
ATB
Locoboy
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Liam
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| posted on 13/4/05 at 12:45 PM |
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Yeah that's me
That's an interesting article that ultima one. Most surprising is how rubish the chassis is in standard form considering the price of those
cars!
Liam
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JonBowden
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| posted on 13/4/05 at 01:11 PM |
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Liam,
did you ever measure the stiffness of your chassis ?
Jon
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locoboy
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| posted on 13/4/05 at 01:39 PM |
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Liam,
My thoughts exactly,
just thing how much stiffness you could get for 3K if you shopped around  
[Edited on 18/4/05 by locoboy]
ATB
Locoboy
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Fred W B
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| posted on 13/4/05 at 02:07 PM |
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http://www.locostbuilders.co.uk/viewthread.php?tid=22142
See here also
Fred WB
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tks
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| posted on 13/4/05 at 05:03 PM |
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WTF
that thing must fly man..
pwww.. what an engine.
looks a bit like the McClaren F1 engine (also BMW v12)
Regards,
The above comments are always meant to be from the above persons perspective.
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Liam
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| posted on 13/4/05 at 05:26 PM |
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quote:
Originally posted by JonBowden
Liam,
did you ever measure the stiffness of your chassis ?
I'd love to know really. All I have is a balsa model much stiffer than a balsa model of a book chassis!! Actually a surprisingly good
method.
I keep intending to either learn an fea package or do an aussie style physical test, but keep spending all my time doing other stuff.
The bracing over the engine bay in my chassis made a huge difference (on the balsa modelling), but that is partly because I can fit neither of
the conventional R tubes in the engine bay and so without the structural scuttle and engine bay frame I have a horribly wobbly engine bay.
Liam
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andylancaster3000
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| posted on 13/4/05 at 07:02 PM |
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Liam, What scale did you do your model to and was the size of the balsa strips to scale too. Also, what method of joining the the balsa wood did you
use.
As you can see i'm interested in making a model of the chassis too! (That chassis is stunning by the way, i do like the in-board suspension.)
Cheers,
Andy
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Liam
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| posted on 13/4/05 at 10:15 PM |
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Cheers Andy...
My model was either 1/10 scale with 2.5mm balsa or maybe 1/8 with 3mm. At any rate the balsa 'tube' was meant to be to scale. To be honest
the model ends up extremely stiff and you could just as well use underscale balsa to be able to see the flex a bit better.
I used superglue which worked fine. Although now it has gone a bit brittle and too much flexing can break joints. There's probably a better
adhesive to use but i dunno really.
Liam
 
Rescued attachment chasismodel.jpg
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Avoneer
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| posted on 13/4/05 at 10:24 PM |
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Nice beer collection as well!
Pat...
No trees were killed in the sending of this message.
However a large number of electrons were terribly inconvenienced.
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DEAN C.
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| posted on 15/4/05 at 11:31 PM |
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I reckon with a bit more paper ang glue and some string it could be flown as well.
Oh sorry I thought it was Blue Peter!
Seriously you have to be admired for the original chassis,well done Liam.
Once I've finished a project why do I start another?
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andyps
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| posted on 16/4/05 at 09:04 PM |
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quote:
Originally posted by Liam
I used superglue which worked fine. Although now it has gone a bit brittle and too much flexing can break joints. There's probably a better
adhesive to use but i dunno really.
Liam
Probably Balsa wood cement if you can still get it.
Andy
An expert is someone who knows more and more about less and less
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