Little Boy Rear Eject Bomb Rocket

thingiverse

This is a remix of my Rear Eject Bomb Rocket MK II modelled after the "Little Boy" Atomic bomb. Like the original, it uses a Pringles can for the large outer tube, a BT-60 tube and a BT-50 tube. This is an "almost" scale version of the original bomb. I say "almost" because I scaled it using a micrometer from a photo of the actual bomb and had to enlarge the fins for stability. I tried it with the fins true to scale and the results were amusing, but probably slightly dangerous. I included an antenna piece in the design, but in the end I just used silver 1.75mm filament and bent it in place and used the detailed pieces with holes. This version works, however, as seen in this video: https://youtu.be/g8EyunRe6hc Per the included chart you can see it reached a height of 454 feet. at least according to my Jolly Logic altimeter. To build this rocket you will need: A standard Pringles Can 290 mm or so of BT-60 body tube. 240 mm or so of BT-50 body tube (for the motor pod) A 15" Chute A 9" Chute Kevlar Line Elastic for a shock cord A 3d Printer, of course and filament to print the parts Paint to preference The bomb cradle shown in the photo can be found at: https://www.thingiverse.com/thing:4622791 Edit 2/17/2021: Updated the fins to make the main fin parts a little thicker for strength.