SpaceX BFR Flying Model Rocket

thingiverse

It flies beautifully! A flyable SpaceX BFR (2017 version) is recommended to use D12-3 or D12-5 motors. The original file was hollowed out and the booster top and bottom were sliced and scaled for Estes BT60 size tubing. Couplers were added to the booster top and bottom. This model includes a 3D printed launch lug that's 3/16" in diameter and an RSO destruct package on the side of the booster. The scale is about 1/200, making it stand 20" tall, and it should fly very well with D, E or F 24mm motors. The booster has 1/16" slots for through-the-wall fins, which are a must-have for stability! I printed mine with 50% infill to add strength and weight in the nose. The .rkt file can be opened with the trial version of Rocksim or the free openrocket. If you use openrocket, keep in mind that it won't show the wings, so any stability predictions should be taken with a grain of salt. If unsure, just add some nose weight! See the assembly section for CG location. You'll need to get these other parts: * BT-60 tubing, 7.5" long * BT-50 tubing, 4" long for motor mount * 2 centering rings, .98" ID X 1.5" OD X 1/16" thick (these are smaller OD than standard BT-60 rings because they'll be inside the plastic part) * I used paper, but plywood would also work. * Motor hook or motor retention of your choice * 4 ea. fins, 3 1/4" X 2" X 1/16", clear polycarbonate or plywood * 18" parachute, shock cord * Launch lug with 1/8" standoff, or printed launch lug