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> How flexible do you think a stock, trailing arm is
ChrisFoley
post Dec 16 2005, 06:19 PM
Post #1


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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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Posts in this topic
Racer Chris   How flexible do you think a stock, trailing arm is   Dec 16 2005, 06:19 PM
Brando   I'm wondering what the deflection is with stoc...   Dec 23 2005, 03:56 PM
Dead Air   This is a cool thread. I'm just thinking out ...   Dec 23 2005, 05:40 PM
SpecialK   <...   Dec 23 2005, 08:08 PM
kwales   Kevin, I think the reason that people don't g...   Dec 23 2005, 10:41 PM
jhadler   Hey Chris, Any new data on the trailing arm flex ...   Dec 28 2005, 04:58 PM
Racer Chris   Yes, just a small amount of new info. I was measu...   Dec 29 2005, 06:28 AM
brant   Chris, did the measurement changes (the .3 degre...   Dec 29 2005, 09:10 AM
J P Stein   How's about filling the arm with some hi-densi...   Dec 29 2005, 11:37 AM
goose2     Dec 29 2005, 11:52 AM
J P Stein     Dec 29 2005, 03:32 PM
Brett W   There are several companies that sell a foam injec...   Dec 29 2005, 06:09 PM
Racer Chris   That's about right, except I am using 1.1 for...   Dec 29 2005, 07:29 PM
Racer Chris     Jan 1 2006, 09:52 AM
brant   Chris, I think this is an awesome product/servic...   Jan 1 2006, 02:59 PM
Racer Chris   Here's some weight data. Stock trailing arm: 1...   Jan 4 2006, 07:32 PM
Eric_Shea   When was the last time I read a 7 page thread?   Jan 4 2006, 08:12 PM
Racer Chris   Yup. Actually more like 38%. (0.3/0.8) More than ...   Jan 4 2006, 08:23 PM
Eric_Shea  
  Jan 4 2006, 08:37 PM
TimT  
  Jan 4 2006, 08:54 PM
Racer Chris   I didn't think you were giving me a hard time...   Jan 4 2006, 09:11 PM
Pinepig   New guy here, I LOVE this forum, you guys rock. ...   Jan 4 2006, 09:14 PM
Racer Chris     Jan 4 2006, 09:14 PM
Racer Chris     Jan 4 2006, 09:20 PM
TimT   Chris, Im getting more concerned with the trail...   Jan 4 2006, 09:20 PM
TimT   Chris I know John did the FEA since he cc'd me...   Jan 4 2006, 09:25 PM
Racer Chris     Jan 4 2006, 09:33 PM
Racer Chris   I shoulda known. :rolleyes: :) One thing the...   Jan 4 2006, 10:05 PM
jluetjen   OK. I'll stop lurking on this thread and post...   Jan 5 2006, 03:54 PM
jluetjen   And from the back side... Click here for larger i...   Jan 5 2006, 03:55 PM
jluetjen   And from the top... (Note that the displacement i...   Jan 5 2006, 03:57 PM
jdogg   <...   Jan 5 2006, 05:38 PM
Porcharu   Something that might be interesting would be to lo...   Jan 5 2006, 05:46 PM
Racer Chris     Jan 5 2006, 06:07 PM
jluetjen     Jan 6 2006, 10:56 AM
andys   Oops, wrong pic...try this one. Andys   Jan 6 2006, 10:58 AM
TimT   http://www.914world.com/bbs...   Jan 6 2006, 11:36 AM
jluetjen   OK, Here are a couple of cases that I've made ...   Jan 6 2006, 12:48 PM
jluetjen   OK. Now I've modified the model to include a ...   Jan 6 2006, 02:24 PM
Porcharu   Another idea for reducing "pucker factor" If we k...   Jan 6 2006, 02:50 PM
McMark   Steve, those were my thoughts awhile back. Drill ...   Jan 6 2006, 03:19 PM
jluetjen   Steve; I suspect that what would would happen is t...   Jan 6 2006, 03:21 PM
Racer Chris   A point approximating the center of the wheel bear...   Jan 7 2006, 08:04 AM
jluetjen   Good morning Chris. Good thoughts. Give me a min...   Jan 7 2006, 08:55 AM
jluetjen   OK. Here's a spreadsheet with the different c...   Jan 7 2006, 08:59 AM
jluetjen   Base model with the cantelivered hub. Click for f...   Jan 7 2006, 09:01 AM
jluetjen   With Mugs914's strut Click here for a full si...   Jan 7 2006, 09:05 AM
jluetjen   And now the external gusset Click here for full s...   Jan 7 2006, 09:06 AM
jluetjen   Chris; If I were to assume that your 914 corners a...   Jan 7 2006, 09:11 AM
Eric_Shea   John, Is the rear caliper inner adjuster tube fac...   Jan 7 2006, 12:30 PM
jluetjen   ...   Jan 7 2006, 01:27 PM
Racer Chris   John, I was away all day working on Tangerine 356 ...   Jan 8 2006, 07:10 AM
Racer Chris   I just identified a big difference betweeen a real...   Jan 8 2006, 07:38 AM
jluetjen  
  Jan 8 2006, 10:54 AM
Eric_Shea   Can someone resize John's pics to 800pxls W?   Jan 8 2006, 10:58 AM
jluetjen   I would if I could -- but I can't.
  Jan 8 2006, 07:52 PM
Brett W   Figure the center of gravity is about 16in off the...   Jan 8 2006, 08:44 PM
pek771   Cool, and very geeky. Is the "Z" axis the real wor...   Jan 8 2006, 08:50 PM
brant     Jan 8 2006, 10:01 PM
pek771   Thanks Brant: I'm trying to absorb this, keepi...   Jan 8 2006, 10:23 PM
Racer Chris   If that were the case then brake pad wear would b...   Jan 9 2006, 06:53 AM
Racer Chris   I've seen evidence of chassis cracks on track ...   Jan 9 2006, 07:00 AM
jluetjen     Jan 9 2006, 07:18 AM
jluetjen   http://www...   Jan 9 2006, 10:06 AM
jluetjen   Here's the spreadsheet with the result of runn...   Jan 9 2006, 12:06 PM
jluetjen   Here's the distortion top view and stresses fo...   Jan 9 2006, 12:22 PM
jluetjen   Here's a view of the same model from outside o...   Jan 9 2006, 12:41 PM
jluetjen   Oops! Here's the attachment.   Jan 9 2006, 12:44 PM
Howard R   So after all of this clever stuff, is there a conc...   Jan 10 2006, 08:05 PM
ChicagoChris   I agree. I love watching you guys talk teck but w...   Jan 10 2006, 09:07 PM
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