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Old Today, 09:44 AM   #1
Lousypirate
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How to determine radius of body panel

I have an idea that requires me to find the radius of a body panel in order to fabricate it. (rockers on my truck)

I cannot get at it with a square to determine the arc, nor do I think one of those fancy straight line pin things are going to tell me much.

Am I overlooking something simple to give me a radius or diameter of a body panel? I would guess that it is in the 4-6" radius region.

Maybe I'm just not thinking about the best way to get a semi accurate reading of the arc.
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Old Today, 10:16 AM   #2
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Take a pic of what you are doing. I may have a few Pipefitter tricks that could help.
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Old Today, 10:59 AM   #3
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Without seeing it you should be able to use a cloth tape measure like a seamstress would use. Mark and measure around the section of the radius. If you can then fit calipers or a compass in there and measure from mark to mark. With those two measurements you should be able to figure out the radius. If you can't get it from there I can draw you a pic and write an equation. Let me know!
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Old Today, 11:26 AM   #4
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Quote:
Originally Posted by Lousypirate View Post
I have an idea that requires me to find the radius of a body panel in order to fabricate it. (rockers on my truck)

I cannot get at it with a square to determine the arc, nor do I think one of those fancy straight line pin things are going to tell me much.

Am I overlooking something simple to give me a radius or diameter of a body panel? I would guess that it is in the 4-6" radius region.

Maybe I'm just not thinking about the best way to get a semi accurate reading of the arc.
Don't you have a degree in mechanical engineering
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Old Today, 11:30 AM   #5
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Don't you have a degree in mechanical engineering

Its a degree from that Flint school..........so you know.





Cardboard Jake, its your friend. Grab a pair of scissors and a sheet of cardboard. Cut until it matches the arc.
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Old Today, 11:31 AM   #6
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Its a degree from that Flint school..........so you know.





Cardboard Jake, its your friend. Grab a pair of scissors and a sheet of cardboard. Cut until it matches the arc.
Do they let the flint engineers have scissors? they might hurt someone.
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Old Today, 11:34 AM   #7
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I gave up on engineering when I moved north
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Old Today, 11:49 AM   #8
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I want to match a piece of pipe cut lengthwise to replace my rocker panels on the side of my 03 silverado crew cab. I want to take a piece of angle iron, and weld the ~90 section of pipe to the angle to replace the old and look stock, I then want to take a piece of DOM or other pipe and make side steps (kind of like they do on the Jeeps).

Then have the bottom lip and steps bedlined when I do the box this summer.



I honestly didn't think about cardboard/cardstock and scissors.


Trying to figure out what size pipe I need to cut up lengthwise to achieve the same radius.
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Old Today, 11:50 AM   #9
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When It would all be done, nobody would notice that it is now made with thicker cross section steel and potentially reinforced to the frame. Aside from the side steps/protection welded to it.
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Old Today, 11:52 AM   #10
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Quote:
Originally Posted by feva4u View Post
Don't you have a degree in mechanical engineering
They don't teach you this kind of stuff


Quote:
Originally Posted by FORD FLARESIDE View Post
Its a degree from that Flint school..........so you know.





Cardboard Jake, its your friend. Grab a pair of scissors and a sheet of cardboard. Cut until it matches the arc.
That might get me in the ballpark, once I copy the arc, is when it gets a little iffy.

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Do they let the flint engineers have scissors? they might hurt someone.
My cell... I mean cubicle, is padded.
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Old Today, 12:13 PM   #11
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Listen to the Pipefitter, he knows his stuff. :Teehee:
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Old Today, 12:21 PM   #12
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Listen to the Pipefitter, he knows his stuff. :Teehee:
lay some pipe.

aha. I didn\\\\\\\\\\'t think about it that way.
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Old Today, 12:45 PM   #13
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:Teehee:
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