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06-02-2009, 11:07 AM
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CC Member
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Join Date: Feb 2008
Location: SW Louisiana,
LA
Cobra Make, Engine: ERA FIA #2128
Posts: 55
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Not Ranked
Steel Specs
Bob,
What grade steel composes the frame, the torsion bars, and the various suspension armatures?
I read with interest your comparison to tubular steel on your website and believe the tubing is 1010. I was just looking for other specs so I could brag to my friends about how well you designed my car.
Doug
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06-02-2009, 01:39 PM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
Quote:
Originally Posted by DoneByDoug
What grade steel composes the frame, the torsion bars, and the various suspension armatures? ... I was just looking for other specs so I could brag to my friends about how well you designed my car.
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Weldox 1300. http://www.ssab.com/en/Brands/WELDOX/Products/ |
06-02-2009, 04:16 PM
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CC Member
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Join Date: Nov 2003
Location: New Britain,
CT
Cobra Make, Engine: Size 10 Feet
Posts: 3,028
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Not Ranked
We use A500 and A512 structural steel tubing for the main rectangular chassis rails. Formed pieces are from 1020 cold-roll sheet. Neither is the pinnacle of steel alloys but nobody's ever bent one except in a major collision (where things bent, absorbing energy, not fractured). Because there are lots of welds in the overall design, I'd rather have weld-friendly alloys rather than something that explodes if something goes wrong.
Round tubing that is used in the suspension and in ancillary chassis pieces is all 1020-1025 DOM tubing. Same reason.
As I explain in the Chassis Design Page, it's the stiffness, not the strength that you notice on the road. |
06-02-2009, 07:52 PM
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CC Member
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Join Date: Feb 2008
Location: SW Louisiana,
LA
Cobra Make, Engine: ERA FIA #2128
Posts: 55
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Not Ranked
Impressive
Bob, Once again, you folks have proven you get what you pay for.
I continue to be blown away by this car. Hats off to you especially. I have zero problems racing mine to the limit.
If you're not an engineer, but still a tech geek as I am, pick up a copy of Engineer to Win-Understanding Race Car Dynamics by Carrol Smith. It will make you very glad you bought an ERA
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06-02-2009, 07:55 PM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
Quote:
Originally Posted by DoneByDoug
I continue to be blown away by this car. Hats off to you especially. I have zero problems racing mine to the limit.
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But had you gone with the secret, unpublished Weldox 1300 upgrade, you'd really be blown away.  |
06-02-2009, 08:02 PM
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CC Member
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Join Date: Feb 2008
Location: SW Louisiana,
LA
Cobra Make, Engine: ERA FIA #2128
Posts: 55
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Not Ranked
Super Top Secret Upgrade
How do you ask for that in Italian?
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06-02-2009, 08:04 PM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,025
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Not Ranked
Quote:
Originally Posted by DoneByDoug
How do you ask for that in Italian?
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“Mangia, mangia!” |
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