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Old 06-21-2014, 11:37 PM   #51
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The engineering side of my brain tells me to weigh in on this conversation, my common sense side tells me to shut up and enjoy the show. . Play on!
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Old 06-22-2014, 07:05 AM   #52
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The engineering side of my brain tells me to weigh in on this conversation, my common sense side tells me to shut up and enjoy the show. . Play on!
I, for one, would like to hear what you have to say.
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Old 06-22-2014, 07:25 AM   #53
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The engineering side of my brain tells me to weigh in on this conversation, my common sense side tells me to shut up and enjoy the show. . Play on!
Jump right in Timmy, would also like to hear your view points on this.
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Old 06-22-2014, 08:22 AM   #54
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I, for one, would like to hear what you have to say.
Make that two.
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Old 06-22-2014, 09:41 AM   #55
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Timmy , Just a sec I have to get a pepsi.

..................

OK now I'm ready......
Jump in!
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Old 06-22-2014, 10:16 AM   #56
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lol. You guys are funny, but torsion axles spread the load on the frame more than spring axles with "direct" frame mounted shackles (as most are). Think surface of contact with frame. Torsion axles also have a rational load rather, than a more linear load of a spring axle. Torsion axles also have a more progressive load movement. There's no question as to having a proper set axles under a trailer, regardless of type.
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Old 06-22-2014, 10:25 AM   #57
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lol. You guys are funny, but torsion axles spread the load on the frame more than spring axles with "direct" frame mounted shackles (as most are). Think surface of contact with frame. Torsion axles also have a rational load rather, than a more linear load of a spring axle. Torsion axles also have a more progressive load movement. There's no question as to having a proper set axles under a trailer, regardless of type.
So, let me see if my poor old brain gets this:

Larger axle support to frame contact than sprung axle means the load is carried by more frame.

What you call "Rational Load" means as the torsion arm deflects it takes more strain per degree of arm rotation to deflect the arm. The last few degrees of rotation takes an exponentially larger amount of force than the first few degrees.

Is that right?
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Old 06-22-2014, 10:41 AM   #58
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Herk, you are correct, and as I read over your earlier post, you stated as such. On a spring axle, as the front tire makes contact with a bump the load is transferred to the front and middle shackle, which will have vertical and horizontal forces applied to it. Torsion axles will have "mostly" vertical forces applied to the frame. Should also be noted that torsion axles are mostly used in lighter weight trailers, that have lighter weight frames, enough force on any frame will bend it. No substitute for properly matched axles.
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Old 06-22-2014, 10:47 AM   #59
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Getting way to technical now. However in the midst of the discussion I have realized that with 7000lbs of axle and 7000lbs of load the suspension is used up at the start with somewhere around 1/2" of travel left. Kinda of wonder if this may lead to premature failure.
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Old 06-22-2014, 10:47 AM   #60
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Thank you. I can understand why better now. The Ultra-lites have lightweight frames and need the broader support and "integral" shock absorbing properties of the torsion axle more so than the heavier frames.
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