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Unread 30-09-2008, 19:15
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Re: pic: drivetrain idea (comments please)

You'll really want to attach the frame members at more than just the ends. I would attach the two outer rails to each other between each wheel at a minimum, and since you're welding, it'll be real simple to do.

Quote:
Originally Posted by JOhnch181 View Post
for cross bracing are team used a heet of 1/2" plywood to create reidgity from side to side. It has the second benefit of giving you a flat surface.
You can use just about any material, but if fastened in enough places, it creates a sheer-web that greatly increases the rigidity of the frame. Depending on the material, you may also need a centered crossbrace to keep it from sagging.

Quote:
Originally Posted by M. Mellott View Post
I would add a cross-brace (1x1 square tubing, 1/16" wall) to keep the frame strong and square...maybe two. They would also serve as additional mounting points for electronic boards and other devices.

As already suggested, using 1/16" wall tubing for the inner frame members is a good idea, but it may not be readily available in the 1x2 size you've chosen (not saying that it's not out there). In the case where you cannot find the 1/16" wall stuff, 1/8" wall U-channel would be a good option to save weight.
I have found 1/16" wall 2x1 to be very available.

Last edited by AdamHeard : 30-09-2008 at 19:30.
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