Innovative 3D Printed Helicopter Rotor Demonstrates Unique Design
Written with artificial intelligence.
A YouTuber has created a novel 3D printed micro helicopter rotor that operates without a swashplate or servos, achieving a lift of 140 grams with a single motor. The project, part of a video series, aims to further develop the helicopter for flight testing.
Overview
A YouTuber known as worked in theory has designed a 3D printed micro helicopter rotor that ingeniously changes blade pitch without the need for a swashplate or servos. This innovative rotor is capable of lifting 140 grams at 5,500 RPM while consuming 29 watts of power.
Development Process
The creator initially experimented with designs inspired by the Black Hornet military nano drone, which uses tiny wheels instead of traditional swashplate linkages. After multiple iterations, the decision was made to eliminate the swashplate to reduce weight and complexity. The rotor's design now incorporates a hinged underactuated rotor, which has been explored by other creators as well.
Performance and Testing
In its final form, this rotor outperforms earlier designs, achieving a 47% increase in lift and a 26% improvement in efficiency. The transition to standard PLA material, known for its stiffness, contributed to these gains. The maker has employed a unique process for shaping the blades, which involves generating a mold to heat-press them into their final curved shape, thus avoiding weaknesses from traditional 3D printing.
Next Steps
While the rotor has demonstrated promising results in a controlled environment, it has yet to be tested in flight. The upcoming Part 2 of the video series will focus on integrating the custom electronics necessary for the rotor's operation and flight capabilities. Key challenges remain, such as managing the rotor’s torque and ensuring effective control at high speeds. The creator plans to share a script that automates the blade generation if there is sufficient interest among viewers.