MikeRJ
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| posted on 16/3/07 at 06:59 PM |
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quote:
Originally posted by gazza285
No twisting moments are applied through to a trailing arm. Strictly compression and tension my friend.
Only if the trailing arms are using rod ends!
With the fairly hard polybushes commonly used on Locosts and pretty much all the manufacturers kits there will be a significant torsional stress
applied to the arms, one of the reasons I went for rod ends at one end of mine.
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12a RX-7
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| posted on 17/3/07 at 12:29 AM |
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quote:
Originally posted by flak monkey
OK i think I know what you are trying to say. But using a stronger material in a structure of any kind doesnt increase its stiffness, only the load it
can take to failure.
By reducing I you are reducing the bending/torsional STIFFNESS of the beam regardless of what material you use, whether its stronger or not. The
strength of the material you are using doesnt enter into the equation at all until you want to calculate the buckling load.
There is a distinct difference between stiffness and strength.
In short if you want a stiff structure, then you need to use beams with a high second moment of area/polar moment of inertia. The effect of the
strength of these beams has no effect on the overall stiffness of the structure. If you want a strong struture as well you also need to use something
like CrMo steel which has a higher yeild point.
Another point, reducing the second moment of area doesnt necessarily reduce weight. Quite the contrary infact. You can increase the stiffness of a
chassis, and reduce its weight by choosing the right beam sections to use.
David
[Edited on 16/3/07 by flak monkey]
thats exactly the point I was trying to make  ... LoL all these words to agree on the same point
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ecosse
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| posted on 17/3/07 at 07:06 PM |
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quote:
Originally posted by Alex B
Alex did you try Hydrasun at Cambuslang . They have seamless hydraulic........was reasonable when I bought from them.
Alex
No missed them, although i must have phoned every other supplier in Lanarkshire  Found a place called Ashworths in Bellshill that keep it, about
£2 a metre 
Mike: Yup, I am doing the same with the rod ends 
Cheers
Alex
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blakep82
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| posted on 18/3/07 at 02:13 PM |
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metal supermarket in govan, basically right across from Ibrox, is good for getting stock. not as cheap as £2 per meter though  bought some seamless
tube yesterday and it was £15 for 3 meters.
they are good though, they'll cut anything for you, say for instance you wanted 5cm of tube, you can buy 5cm, you don't have to buy it by
the meter.
why the hell is it snowing outside?!
[Edited on 18/3/07 by blakep82]
________________________
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!
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ecosse
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| posted on 18/3/07 at 06:45 PM |
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quote:
Originally posted by blakep82
metal supermarket in govan, basically right across from Ibrox, is good for getting stock. not as cheap as £2 per meter though bought some seamless
tube yesterday and it was £15 for 3 meters.
they are good though, they'll cut anything for you, say for instance you wanted 5cm of tube, you can buy 5cm, you don't have to buy it by
the meter.
why the hell is it snowing outside?!
[Edited on 18/3/07 by blakep82]
Yeh, I've used them for a fair amount of stuff now, but when I phoned they said they didn't have any 19mm seamless and it was going to
cost about £10 pm to get in! 
I'm going to collect the cheap stuff tomorrow, so I'll see what it is like then.
Cheers
Alex
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