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Unread 21-05-2014, 13:27
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Re: 971's chassis

Quote:
Originally Posted by AustinSchuh View Post
We ran the "original" 3 piece design in 2012 and 2013, and it has served us very well.

We couldn't find a way to make an octagon with a 3 piece chassis, which means it probably isn't possible or easily to machine. We wanted an unbroken flange to help form a backbone to tie everything to and to tie everything together. The best way to do that that we found was to set the chassis up as you see this year. We started by figuring out where to put the wheels and pulleys, and then built the frame to hold everything in place. This resulted in the jog on the inner face, which resulted in an internal corner which couldn't be bent without breaking things up into more pieces. We also needed a parallel face to bolt the wheel tensioners to, which drove the inner frame rail shape that you see. You can see the set of 8 #6 holes that define the tensioner location in one of the pictures.
Austin,

Is the CAD model for this available somewhere? I'd like to take a closer look at how you worked around the internal bends on that inner face.
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