RGClark
Mathematician
In looking at examples of "carbon fiber" fins I've only seen cases actually consisting of fiberglass plate, commonly G10, with layers of carbon fiber fabric laid on top to serve as reinforcement. See for example here:
https://groveraerospace.com/?page_id=79
But solid carbon fiber is legendary for its stiffness. For instance in Formula 1 car racing, where saving weight is nearly as important as for space rockets, the chassis and roll cage are now exclusively made of carbon fiber because of its resistance to bending and twisting at lightweight.
Then solid carbon fiber plate can provide the same resistance to bending as with fin flutter as aluminum but at a smaller thickness for the fins:
https://www.dexcraft.com/articles/c...als/#rigidity_and_strength_the_same_thickness
For the sizes needed for fins it is not particularly expensive either:
https://dragonplate.com/ecart/categories.asp?cID=65
Carbon Fiber Sheet 1.5mm*300mm*150mm.
https://hobbyking.com/en_us/carbon-fiber-sheet-1-5mm-300mm-150mm.html
Bob Clark
https://groveraerospace.com/?page_id=79
But solid carbon fiber is legendary for its stiffness. For instance in Formula 1 car racing, where saving weight is nearly as important as for space rockets, the chassis and roll cage are now exclusively made of carbon fiber because of its resistance to bending and twisting at lightweight.
Then solid carbon fiber plate can provide the same resistance to bending as with fin flutter as aluminum but at a smaller thickness for the fins:
https://www.dexcraft.com/articles/c...als/#rigidity_and_strength_the_same_thickness
For the sizes needed for fins it is not particularly expensive either:
https://dragonplate.com/ecart/categories.asp?cID=65
Carbon Fiber Sheet 1.5mm*300mm*150mm.
https://hobbyking.com/en_us/carbon-fiber-sheet-1-5mm-300mm-150mm.html
Bob Clark