Modular Boomerang, three-bladed

thingiverse

Tri-bladed Modular Boomerang ========================== Schm4704's Tri-Bladed Boomerang was too large for my print-bed, so I chopped off the blades and created my own Modular Boomerang. Safety ------- Boomerangs were originally invented in Australia as a hunting weapon, making them no toy! Always fly yours in a safe area and consider eye protection and gloves. Children should be supervised closely. Tri-bladed boomerang --------------------------- Three bladed boomerangs are suited to intermediate skilled throwers, offering a compromise between best distance and ease of having your boomerang come back to you. If you're a beginner, my four bladed boomerang is recommended [thing:3678915](https://www.thingiverse.com/thing:3678915). For experienced throwers, see my two-blade boomerang [thing:3679523](https://www.thingiverse.com/thing:3679523). The blades are interchangeable; only the hubs differ. Files ------- *Update: I replaced the hubs to give a 2 degree twist to the blades, providing more lift and better flight.* To print your boomerang, you need three blades and one hub. You can scale the models to any size that suits you. I include files for a small 250mm diameter boomerang (which should print on any 3D printer), a regular 350mm diameter (requiring a minimum print bed length of 150mm) and a large 400mm diameter (requiring a minimum print bed length of 170mm). I also include Leftie files for left-handed throwers. Printing --------- As with any model that has a large contact area with the print bed, you need good print-bed adhesive. If your printer has a heated bed, set it a few degrees higher than recommended to prevent warping. Use a maximum 0.2mm layer thickness to keep the top of the boomerang smooth. You should make the boomerang as heavy as possible for better flight. Print it solid with plenty of top and bottom layers. Set infill to 100%. Flying your boomerang -------------------------- The blades should clip tight into the hub, but you may want to glue the joints to prevent movement of the blades. Before gluing the joints, make small adjustments to the angle of the blades for different flying characteristics. There are many online resources that show how to throw a boomerang; here's one I found on [boomerangs.com](https://www.boomerangs.com/pages/how-to-throw-boomerangs). The holes in the end of the blades allow you to rivet metal into them for extra weight if needed.