Besides the Pershing 1A, I have another 3D printed rocket project underway, a Saturn 1B. The main body is constructed around a BT-60 sized body tube. The scale will be about 1:156. The 3D files were created by scottdee and I downloaded them from https://www.thingiverse.com/thing:2958861. I upscaled the fin unit to 103% so the inside diameter matched the inside diameter of a BT-60. By chance, 8 BT-4 Semroc tubes from eRockets seem to fit perfectly inside the BT-60 and the fin can now that I slightly upscaled it. Unfortunately a BT-20 for the engine mount is a tiny bit too big to fit inside the BT-4s without deforming them, but no worries, I’ll trim a tiny bit out of the BT-4s the length of the engine mount.
"You know, it, uh, won’t fly unless somebody pushes the button." From the movie October Sky.
