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Maybe I missed this but I'm curious why you're using a live axle in a full custom chassis like this for track use. I thought most track cars had IRS? I mean as a hillbilly truck builder I love SRA builds, don't get me wrong, I just thought they were passe on pavement builds.
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Nov 13, 2020 02:05
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| # ¿ May 22, 2024 08:49 |
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Perfect is the enemy of good enough, my constant nemesis, and I suspect yours too. I think your "get a 2d spline and spin it around to check for contact" plan is good enough.
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Mar 8, 2021 18:31
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Are you planning on autoclaving these parts or STP cure? Prepreg or wet layup?
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Apr 1, 2021 23:37
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Prepreg is a LOT less miserable. We used mostly prepreg at TF when I was there, with a few assemblies done wet where we had to for various reasons (complicated, extremely thick, or a combination of materials that we didn't have on hand in prepreg). As I recall we did oven baked vac bag for most parts. Long as you get your material well laid and pushed into the corners to avoid air pockets and bridging, it works alright. Especially since it sounds like most of your parts aren't going to be structural.
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Apr 2, 2021 00:21
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I know we used pink foam for toolpath testing, but I can't remember if we used it for any actual baked parts. We mostly used MDF molds coated with epoxy to reduce vacuum loss, with some more critical parts done in full CF molds where they were large enough that MDF wouldn't work for dimensional stability or vacuum loss reasons.
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Apr 2, 2021 00:25
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My problem has always been tolerance stackup and warping from full welding sub-units before trying to put them all together. And I've never even attempted something that large.
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May 16, 2021 15:58
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The table will help but it won't prevent all warping. I would get 3 or 4 good solid tacks on and do any welds that will be annoying or impossible to do once it's complete and do the rest once it's fully assembled and tacked up, but... I'm certainly no pro.
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May 16, 2021 19:49
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You could even make your gussets with brake cooling in mind, or at least plan them so that your cooling ducts bolt conveniently to them instead of inconveniently.
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Oct 9, 2021 17:02
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| # ¿ May 22, 2024 08:49 |
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Yeah, that should make things a lot easier at least. Just gotta make sure you maintain wall thickness, draft, oil drainage, and clearance to any stuff the part covers I guess. How do you account for shrinkage? Is it mostly isometric or will parts shrink more in certain directions?
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Nov 24, 2021 04:04
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