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08-24-2011, 09:23 PM
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#1 |
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Tiny Member
Join Date: Jan 2007
Location: Colerain
Posts: 798
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I have no knowledge whatsoever on this subject ... but I do have access to a couple different engineering software packages.
We have a simple little Excel MOI worksheet that generated a .537 MOI with 2.0x.25 DOM .. It generated .325 MOI on 2.0x.125 and .264 on 1.875x.125... for a total MOI of .589... in theory doubled tube is stronger correct? check this thread out... http://www.pirate4x4.com/forum/showt...+tube+strength |
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08-24-2011, 10:12 PM
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#2 | |
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Join Date: May 2007
Location: cincinnati
Posts: 18
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08-24-2011, 10:14 PM
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#3 | |
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The idea is technically correct, however 1.875 is too big to fit in 2.0x.125. When it is reduced to the 1.75x.125, he combined MOI is equal. This is assuming that the nominal vs actual diameters and wall thickness are exact. Mind you, I am not advocating that sleeving is never worthwhile; I am only saying that it is not a worthwhile effort to go and purchase the tube to make your own when you can buy the product ready-made.
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1988 Suzuki Samurai on propane FJ 40 axles (4.10) 5.14 tcase 36" TSL SX |
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08-24-2011, 10:52 PM
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#4 |
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Join Date: Sep 2008
Posts: 573
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Lot if good info in that thread... Crazy to think 1.75x.12 is stronger than 1.5x.25. That means this 1.75x.12 cage I just finished up is stronger than what I used to use for link bars (1.5x.12).... Learn somethin new everyday... Thanks cw and the pirate crew for doin your homework
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S10 with a few air shocks.. 
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08-24-2011, 11:27 PM
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#5 |
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Cleaning off the rust...
Join Date: Jan 2007
Location: Cincinnati, OH
Posts: 1,009
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I'm glad that we're keeping this theoretical.... It's a great discussion topic... MOI is a great indicator for bending resistance...
nshefbuch, I'm not sure of when or which projects these were on ("budget builds" vs "unobtanium"), but I'm guessing that Ian (a former teacher) chose to use the materials that represented what the largest cross-section of the Extreme 4x4 audience might have available... Do I believe that Ian's personal buggy has sleeved tube, umm... NEGATIVE.
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brad  5.0L | 435 | 203 | 300 | 4.10 | 39.5 Buildup BACK underway... 
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