The file 'Model Rocket Fin Alignment Guide & Clips For BT-20 & BT-50 Body Tubes 3D Printer Model' is (scad,stl,thing) file type, size is 2.6MB.
Estes's Fin Alignment tool is really cool, but costs like $20, which is a bit steep if you have a club or school class trying to build a dozen rockets at the same time.
I plan to add some photos of it in use in a bit...
So I printed some Fin Alignment guides for 3, 4 & 5 fin rockets using BT-20 and BT-50 tubes. They take a little while to print, but way cheaper than buying a bunch of "real" tools.
Don't forget to check out L3-G0, my completely unrelated working full size Lego R2-D2 on his blog at http://L3-G0.blogspot.com or YouTube.
3_Fin_Alignment_Guide.scad | 2.0KB | |
3_Fin_Alignment_Guide.stl | 3.2MB | |
4_Fin_Alignment_Guide.scad | 2.0KB | |
4_Fin_Alignment_Guide.stl | 3.8MB | |
5_Fin_Alignment_Guide.scad | 2.0KB | |
5_Fin_Alignment_Guide.stl | 4.4MB | |
assortment.thing | 585.7KB | |
Fin_Alignment_Shim.scad | 1.3KB | |
Fin_Alignment_Shim.stl | 84.6KB | |
Fin_Clips.scad | 1.2KB | |
Fin_Clips.stl | 141.8KB | |
Skinny_3_Fin_Alignment_Guide.stl | 3.1MB | |
Skinny_4_Fin_Alignment_Guide.stl | 3.7MB | |
Skinny_5_Fin_Alignment_Guide.stl | 4.4MB |