This is my latest scratch build that I finished last week sometime... I did take a few liberties in the direction of stability -- slightly longer nose / body and slightly larger rear fins.
Have not launched it yet and I cannot figure out how to simulate that ring tail in OpenRocket. I did try a swing test and FWIW and it flew stable (nice whistle too) with the engine loaded and 2oz in nose (I'd like to go down to 1oz but maybe I'll stick with 2oz to be safe for maiden launch). With 2oz in nose and D12-3 engine loaded, CG is just about at front of the front most fins that connect ring tail to body. I am also planning to do another one with oatmeal container for the ring tail instead of 3D printed.
Anyway, I will post a video -- good, bad, or ugly -- when I launch it.
Have not launched it yet and I cannot figure out how to simulate that ring tail in OpenRocket. I did try a swing test and FWIW and it flew stable (nice whistle too) with the engine loaded and 2oz in nose (I'd like to go down to 1oz but maybe I'll stick with 2oz to be safe for maiden launch). With 2oz in nose and D12-3 engine loaded, CG is just about at front of the front most fins that connect ring tail to body. I am also planning to do another one with oatmeal container for the ring tail instead of 3D printed.
Anyway, I will post a video -- good, bad, or ugly -- when I launch it.