1/8 Carbon Fiber main chassis
11-15-2020, 02:37 PM
#63
Tech Rookie
Mistake.
how can I delete this.
how can I delete this.
11-22-2020, 08:20 PM
#64
Tech Adept
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RC8.2e with carbon fiber chassis
This one was made by SNR carbon some time ago
12-03-2020, 02:15 AM
#65
Tech Regular
I’ve been playing with composites for a while now, and I couldn’t see any reason why you couldn’t make an excellent composite fabric as long as you have a basic understanding of the materials, and a good idea about what you want to accomplish.
I’d start by either using the existing chassis to make a mould, or fashion a dummy chassis in the shape you want and then make a mould from it.
Depending on the stiffness required, I’d probably lay some aramid on the bottom (and wrapped “up the sides” for abrasion resistance), 300gms/m2 2x2 twill would be ok, but possible a bit thick. In the centre, depending on how stiff you wanted it, 4 llayers of 90g/m2 or 2 layers of200g/m2 cloth, with the weave running either 0-180 degrees for longitudinal stiffness, or 315-45 if you wanted a more general rigidity. You could also run 1 layer going each direction, sacrificing a tiny bit of stiffness in each direction for overall multi direction rigidity. For the prototype I’d definitely be keeping an eye on the thickness, but for a “production” chassis you could use a few layers of lightweight as a sacrificial surface if your really concerned with abrasion.
I haven’t calculated the thickness of a layup like that, I’ll try and remember to do it, but having had a little bit of a think about it it’s definitely do-able, but is it desirable? Could it be too rigid?
Edit: Just had a little bit more of a think about it, and could triple the layers I’ve suggested and come in under 3mm thick if you vac bagged I at about 1 bar, so it would probably be way too stiff unless that was the goal.
I’d start by either using the existing chassis to make a mould, or fashion a dummy chassis in the shape you want and then make a mould from it.
Depending on the stiffness required, I’d probably lay some aramid on the bottom (and wrapped “up the sides” for abrasion resistance), 300gms/m2 2x2 twill would be ok, but possible a bit thick. In the centre, depending on how stiff you wanted it, 4 llayers of 90g/m2 or 2 layers of200g/m2 cloth, with the weave running either 0-180 degrees for longitudinal stiffness, or 315-45 if you wanted a more general rigidity. You could also run 1 layer going each direction, sacrificing a tiny bit of stiffness in each direction for overall multi direction rigidity. For the prototype I’d definitely be keeping an eye on the thickness, but for a “production” chassis you could use a few layers of lightweight as a sacrificial surface if your really concerned with abrasion.
I haven’t calculated the thickness of a layup like that, I’ll try and remember to do it, but having had a little bit of a think about it it’s definitely do-able, but is it desirable? Could it be too rigid?
Edit: Just had a little bit more of a think about it, and could triple the layers I’ve suggested and come in under 3mm thick if you vac bagged I at about 1 bar, so it would probably be way too stiff unless that was the goal.
Last edited by Smokeyr67; 12-03-2020 at 02:47 AM.
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