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Randal |
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#21
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Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 ![]() |
Anyone know of a strain gage that measures in lbs or kg's that I can use to measure the downforce of my new rear spoiler. I plan on mounting it underneath the truck lid between the lid and the fiberglass frame. Like where the arrows are pointing:
![]() I figure if I can find something that reads the downward force I can just set it up with a video camera pointing at the gage, drive down the freeway. with the car on the trailer and get some readings. |
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J P Stein |
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#22
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Irrelevant old fart ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None ![]() |
Just my opinion, of course, but the load cells could be set up to detect downforce from a wing or spoiler mounted on the trunk lid regardless of the suspension springs. They would also detect load from bumps.....inertia of the lid spoiler/lid.
One would have to chart it to take these unwanted loads out or, at worst, have a tell tale meter of some type to record max load then make a SWAG as to aero load......not worth the time/effort, me thinks, however....Joe Chen is an engineering prof up in BC, IIRC, and if anybody has done this, he would be my best bet. That car is fantastic. I looked at the rear suspension for about 15 minutes trying to figure out how it worked.....still not sure I got it. I'll do better iff'n I get another chance. (IMG:style_emoticons/default/biggrin.gif) |
Randal |
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#23
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Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 ![]() |
Just my opinion, of course, but the load cells could be set up to detect downforce from a wing or spoiler mounted on the trunk lid regardless of the suspension springs. They would also detect load from bumps.....inertia of the lid spoiler/lid. One would have to chart it to take these unwanted loads out or, at worst, have a tell tale meter of some type to record max load then make a SWAG as to aero load......not worth the time/effort, me thinks, however....Joe Chen is an engineering prof up in BC, IIRC, and if anybody has done this, he would be my best bet. That car is fantastic. I looked at the rear suspension for about 15 minutes trying to figure out how it worked.....still not sure I got it. I'll do better iff'n I get another chance. (IMG:style_emoticons/default/biggrin.gif) Right, all that difuser stuff is complicated. There are actually some for sale on the internet that look like they would bolt right on a teener. BTW that A Mod car was really cool. How fast were his times as compared to others there? ![]() |
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