Adding rear subframe cross braces

I was able to make a trip to the metal supply shop here in town this past weekend. On my single item list was 10 feet of 1″ 0.063 wall tubing. The entire frame calls for somewhere around 20 feet total, but most of that will be used for the suspension A-arms and isn’t necessary to have on hand now anyways. Also, final decisions haven’t been made as to what wall thickness to use for those parts.

I was pretty impressed how these tubes turned out. Not much gap here and shouldn’t be a problem to weld up nicely. It’s really starting to come together; it almost looks like pieces of a car….well, a open wheel tube frame car, anyways…

3 thoughts on “Adding rear subframe cross braces”

  1. You are really doing a great work, can’t wait to see more of your progress. Could you please mention the tubing type and sizes you are using for the frame? How did you end up deciding which size (OD, wall tubing, etc) to use? Guess, calculation or did you have the chance to measure it on an actual atom?

  2. George, I could measure for you, but by memory I believe we are using 2.25″ .120 wall tubing. The actual Atom, from everything I could gather, used more like 2.5″ .065 tubing, but I wasn’t able to readily find that in my area. I figured this will be stronger and easier to weld to anyways and won’t affect the overall weight of the car much at all. I will post up the model when the main members of the car are solidified so that others can use it. Keep checking back!

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