 How flexible do you think a stock, trailing arm is |
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| ChrisFoley |
 Dec 16 2005, 06:19 PM
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I am Tangerine Racing  Group: Members Posts: 7,968 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None 
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Specifically I am looking for rotational stiffness (ie. twist) of the trailing arm due to the tire contact patch resisting sideways sliding of the car. I'm only interested in forces greater than 1G during cornering.
I already know what happens but go ahead and take a guess. (IMG:style_emoticons/default/biggrin.gif) I'll post pictures of my test fixture shortly. |
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| Mugs914 |
Dec 17 2005, 09:30 PM
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"Hey, yellow IS faster!" Group: Members Posts: 618 Joined: 22-July 05 From: Temple TEXAS Member No.: 4,452 Region Association: Southwest Region |
This is one of the best threads I've seen here! Thanks for the effort and for sharing the results Chris! (IMG:http://www.914world.com/bbs2/html/emoticons/pray.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/pray.gif)
Here is the way we reinforce trailing arms. It isn't an original idea and most of you have probably seen it before, but here's a pic just in case. Its a 'tubular" method... The tube goes from the bearing carrier diagonally through both sides of the arm. Triagulates and stiffens the walls of the arm in one shot. Never have tested one, maybe we should send one out to you so it can be compared to others on the same rig. It would be nice to know if we are accomplishing anything.... (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif) Attached image(s) 
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Posts in this topic
Racer Chris How flexible do you think a stock, trailing arm is Dec 16 2005, 06:19 PM
TimT Chris the trailing arm appears to be a pretty sto... Dec 16 2005, 06:25 PM J P Stein WAG:
1 deg @500 lbs.
I'm assuming you're ... Dec 16 2005, 06:26 PM airsix What exactly do you mean by "1G". I'm sure you... Dec 16 2005, 07:09 PM ppickerell Chris,
Do you intend to test before and after boxi... Dec 16 2005, 07:41 PM Dave_Darling I'm guessing that most of the flex happens in ... Dec 16 2005, 07:54 PM spare time toys My guess is it has flex designed into it at an amo... Dec 16 2005, 08:08 PM Racer Chris So far JP is the only one really on the right trac... Dec 16 2005, 08:24 PM Racer Chris Then I attached a 5ft piece of structural tubing t... Dec 16 2005, 08:26 PM Racer Chris by putting a 200lb man's weight at the end of ... Dec 16 2005, 08:32 PM Racer Chris I had a friend sit on the end of the tube and saw ... Dec 16 2005, 08:34 PM Racer Chris I have several more tests planned already.
1) meas... Dec 16 2005, 08:40 PM TimT Put the level on the trailing arm, not the lever
... Dec 16 2005, 08:41 PM TimT and yes I see the angle you have welded on the bo... Dec 16 2005, 08:42 PM SpecialK ....go on.... http://www.914wor... Dec 16 2005, 08:43 PM andys Chris,
This is exactly the kind of testing requir... Dec 16 2005, 08:57 PM goose2 If you mount the level in various locations on the... Dec 16 2005, 09:06 PM TimT 
