The maker uhltimate has presented a 3D-printed catapult. In contrast to conventional torsion springs, the model uses four leaf springs, which results in interesting kinematics.
The developer explains the structure and functionality of the catapult in detail in a video. The catapult is cocked by simply pressing down the throwing arm, which is then locked in place with a slider. A light push on the slide is all that is needed to release it.
One remarkable aspect of the design is the force distribution. With conventional torsion spring catapults, the force required increases steadily and reaches its maximum in the end position. The new leaf spring design, on the other hand, shows an initial increase in force followed by a significant drop.
In tests, the small model consistently achieved a throwing range of 10 metres. A version scaled to 210%, which pushes the limits of commercially available 3D printers, achieved 25 metres.
The maker makes the 3D print files available free of charge on Thingiverse. For printing, he recommends special settings to increase stability. The assembly is explained step by step, paying particular attention to the correct alignment of the connecting arms and the secure attachment of all components.
Subscribe to our Newsletter
3DPresso is a weekly newsletter that links to the most exciting global stories from the 3D printing and additive manufacturing industry.
