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Author: Subject: seamless?
AzraeL

posted on 17/12/05 at 01:47 PM Reply With Quote
seamless?

Another question from holland...

I know your're gonna call me a cheapass and that's ok.. But is it really neccessary to use seamless steel pipes for the wishbones???
I was thinking of using "regular" pipes but of a slightly bigger diameter...
Would that be a problem??

The car is a modified locost by the book, but with IRS...
And I'm going to place a 300HP 400Nm C20LET Vaux in it.. (I know it's ridiculous but "It has to be!"






















Wouter





OMG... It's actually starting to look like a car...

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gazza285

posted on 17/12/05 at 01:51 PM Reply With Quote
I've made replacement ones for a Westfield out of some thick walled tube, that was about five years ago, no problems reported since.





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ludsonline

posted on 17/12/05 at 03:44 PM Reply With Quote
ERW Wishbones

http://212.53.73.128/cgi/forums/YaBB.cgi?board=Technical&action=display&num=1132245026
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kb58

posted on 17/12/05 at 05:01 PM Reply With Quote
quote:
Originally posted by AzraeL
is it really neccessary to use seamless steel pipes for the wishbones??? Wouter


No, as long as the tubing is sized for the expected load. Remember that larger thin wall tubing is stiffer then smaller thick wall tubing.





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

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JoelP

posted on 17/12/05 at 06:36 PM Reply With Quote
people often seem to use 25mm x 2mm wall erw tubing, would the consensus be that this is adequate provided the shock mounting is well thought out?





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Mr G

posted on 17/12/05 at 07:21 PM Reply With Quote
cheapass
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kb58

posted on 17/12/05 at 07:25 PM Reply With Quote
quote:
Originally posted by Mr G
cheapass


Locost





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

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Mr G

posted on 17/12/05 at 09:58 PM Reply With Quote
quote:
Originally posted by kb58
quote:
Originally posted by Mr G
cheapass


Locost


Where!?








Normal is getting dressed in clothes that you buy for work and driving through traffic in a
car that you are still paying for - in order to get to the job you need to pay for the clothes
and the car, and the house you leave vacant all day so you can afford to live in it.

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andyharding

posted on 17/12/05 at 10:05 PM Reply With Quote
MK Wishbones are made of ERW.

I would be happy using 25mm round 1.5mm wall.





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AzraeL

posted on 18/12/05 at 08:13 AM Reply With Quote
LOL

Thanks for the advice guys!!
I'm a lot more comfortable now with using 22mm 2mm wallthicknes!

Wouter





OMG... It's actually starting to look like a car...

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Triton

posted on 18/12/05 at 11:06 AM Reply With Quote
All those using flat oval tube are using ERW





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Mark Allanson

posted on 18/12/05 at 11:23 AM Reply With Quote
I have only seen true oval tube on one car, the rest were just partially crushed round





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Triton

posted on 18/12/05 at 11:27 AM Reply With Quote
It's called flat oval Mark. Aero tube is the groovy stuff but damn expensive





My Daughter has taken over production of the damn fine Triton race seats and her contact email is emmatrs@live.co.uk.

www.tritonraceseats.com

www.hairyhedgehog.com

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Mark Allanson

posted on 18/12/05 at 11:31 AM Reply With Quote
Yes, it comes complete with granular areas in the crushed sections





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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kb58

posted on 18/12/05 at 05:18 PM Reply With Quote
The real issue is most of us have no idea what loads get fed into these tubes. Sure we can work it out for a given cornering force, that's not hard. The real issue concerns hitting a pothole... just what load does that feed in? How big is the pothole, how deep, how wide? How much air is in the tires, are the tubes already curved, all of this changes the answer.

Since all we can do is guess, guess on the high side. That is, if you calculate during 1G cornering, a given suspension tube will have 300lbs compression load, round WAY up for design purposes, like 1500lbs.

I used a "Strength of Materials" book to find column strength of the tubing I was using. I would have used 25mm OD, 1.5mm wall thickness all around until I found it was too weak for the rear, so those tubes are 32mm OD.

[Edited on 12/18/05 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

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AzraeL

posted on 21/12/05 at 07:31 AM Reply With Quote
I've been busy again....






We've bought a ford gearbox today..



The bell-housings.. We'll have to modify one to fit both engine and gearbox..





Milling the adaptorplate on my cnc-mill...








Can someone identify that gearbox for
me?? What type is it? MT75?
On the outside it's exactly the same size as a T9... Would it be possible to fit the internals of a T9??

Wouter

[Edited on 21/12/05 by AzraeL]





OMG... It's actually starting to look like a car...

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Schrodinger

posted on 21/12/05 at 01:18 PM Reply With Quote
Wouter
It looks like a T9 to me.
If reverse is push down on the lever and left/forward then it's a T9 otherwise the MT75 has reverse to the right and back.
It doesn't look much like this?
https://www.burtonpower.com/Default.aspx
Tech Support & MT75

Looking at the speedo drive it comes from acar with an electronic speedo.

Hope that helps

Keith
Suffolk

[Edited on 21/12/05 by Schrodinger]

[Edited on 21/12/05 by Schrodinger]

[Edited on 21/12/05 by Schrodinger]

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AzraeL

posted on 21/12/05 at 02:53 PM Reply With Quote
well then it´s probably a T9..
I´ll check tomorrow!
Thanx for the info!

Wouter





OMG... It's actually starting to look like a car...

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