Seam welding chassis, Video on how effective it is |
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Seam welding chassis, Video on how effective it is |
TravisNeff |
Dec 8 2018, 04:20 PM
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#1
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914 Guru Group: Members Posts: 5,082 Joined: 20-March 03 From: Mesa, AZ Member No.: 447 Region Association: Southwest Region |
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tperazzo |
Jan 19 2019, 08:09 PM
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#2
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Newbie Group: Members Posts: 14 Joined: 28-July 09 From: Huntington Beach Member No.: 10,619 Region Association: None |
This week I did some experimentation with the forces in the front strut bar. I thought the results were quite surprising! Maybe not very relevant to the 914 because it already has better front strut support than the 911.
1) Increased torsional rigidity is about 10% 2) Max load in the horizontal bar was measured at 70 lbs 3) The loads alternate between tension and compression 4) Changes in camber are very small with or without the strut bar This video is a bit long, but I did everything I could to make the strut brace look good. At the end of the day it didn't impress me much. https://youtu.be/QjGYaeYew8s |
jd74914 |
Jan 20 2019, 07:36 AM
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#3
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Its alive Group: Members Posts: 4,780 Joined: 16-February 04 From: CT Member No.: 1,659 Region Association: North East States |
1) Increased torsional rigidity is about 10% ... At the end of the day it didn't impress me much. This is very cool stuff-super impressed!! Please note, I haven't watched watched the video yet, so please ignore if you covered the questions below. Just curious on your thoughts. To me, 10% stiffness gain is a lot. I would have killed to have gained that with minimal weight in the tube chassis cars I've designed. Why aren't you happy with that number? Out of your scope, but it'd be interesting to see if there would be a difference if the strut bar was more of a strut panel with two wide spaced vertical attachment points and a larger vertical dimension (more box that bar) to make it more like a shear panel. I feel like something that could resist twisting loads might more effective than what's effectively a pure tension/compression member. |
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