Pull Cord Helicopter Toy

grabcad

The 3D printable pull cord helicopter toy offers a nostalgic yet innovative design with a rack-and-pinion spiral that uncoils for use. Created during the Ultimaker 3D Printer Toy Design Challenge, it boasts an easy assembly process requiring no glue or secondary materials. The toy is 100% printable and features snap-together parts for simplicity. To ensure successful printing, handles should be printed in nylon (if possible), ABS, orients upwards with holes or snaps facing up; gearshafts in nylon (preferred), PLA, or ABS, oriented vertically with the square hole at the top; propellers in nylon (preferred), PLA, or ABS, upside down with the large flat surface on the build plate; and pull cords in nylon (ideal) or ABS, printed spiraling inward clockwise from the top. Nylon or PLA parts require 20-40% infill with 3 extra perimeters, while ABS parts require 5-10% infill with 1 extra perimeter. All parts should be printed at layer heights between .2 and .3mm. After printing, insert the gearshaft with rectangular hole outward into handles' cavity, snap them together, and do minor sanding or filing if necessary. Enjoy your new 3D printable pull cord helicopter toy!