This is a compliant mechanism that is 3D printed as just ONE piece! I tested many materials with varying flexibility, because in order for the motor work it could NOT be too flexible. However, it also have to be flexible enough for a small 9 gram servo to move the pivot. Even though a small brushless motor was used it still overpowered the 3D printed mechanism. The thin plastic bent once the motor produced thrust causing the radio controlled airplane to dive straight into the ground in a spectacular fashion.

Veritasium's video:    • Why Machines That Bend Are Better  

Best 3D printer to start with (affiliate): https://amzn.to/3vfMsoF

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