 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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#1
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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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| IronHillRestorations |
Dec 17 2005, 09:00 AM
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I. I. R. C. Group: Members Posts: 6,792 Joined: 18-March 03 From: West TN Member No.: 439 Region Association: None
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I saw one of the 1997 GT1 chassis on a deflection dyno at the Wiessach facility, and they had around 40 dial indicators at different places on the chassis. Forget about any photos, strictly verbotten (sp), and they probably would have shot you on the spot.
Al Swanson has run this part on a computer modeling program where he works (can't tell you that either (IMG:http://www.914world.com/bbs2/html/emoticons/cool.gif) ), and found that welding the so called stiffeners actually weakend the the part, primarily due to annealing the steel. The other consideration would be the bushings used. IMHO any stiffening would be mute with anything less than solid bushings, for obvious reasons. I've always thought the tubing through the trailing arm would be the best way to go. |
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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 
