Flutterby Model Rocket

thingiverse

I was looking for a model rocket that retained the spent engine (living in a dry area, I knew how critical this feature was). However, I wanted to avoid the conventional parachute or streamer recovery method. Here's my solution: the Flutterby. On ejection, it splits into two distinct parts: the tail, which retains the spent motor and tumbles back, and the nose, which retains one fin and comes back with a trajectory similar to that of a maple seed. The Flutterby is available in three sizes: the standard Flutterby (suitable for 18mm A/B/C motors), the Flutterby-T (for T-sized 13mm motors), and the Flutterby-D (designed for 24mm D-sized motors). I have not yet had the opportunity to test the Flutterby-D in a field setting. The model is printed using PETG. PLA is unlikely to be a suitable choice, as it may become too brittle or heat-sensitive at the same time. Supports are not required; simply print the flat tube section at the bottom for Fore and Aft, and orient the long straight section downwards for Fin (you will need to add a brim). Each Flutterby comes in three separate parts: Fore, Fin, and Aft. To assemble the nose piece, super-glue the Fore and Fin components together; a convenient hole allows for a 1.75mm filament through-pin if desired. Assembling the two pieces around the rocket motor is necessary to secure them in place (without one, they will not stay together). Align the fin with the nubs on either side of the back section to ensure radial symmetry. If the alignment is off, stability cannot be guaranteed. Enjoy!