Water Rocket Gridfins

thingiverse

I wanted to create large fins for my water rocket but couldn't find designs with a sufficient wingspan without incurring mass penalties. I decided to design fins that would be both mass-efficient and drag-inducing, resulting in these gridfins made specifically for big water rockets like mine, which is about 12 liters. To print the gridfin file, you'll need to do it four times to achieve symmetry. Additionally, the ring may not fit perfectly on your specific bottle, as it's designed for a 110mm 2L bottle. Be sure to test them out and enjoy rocketeering!