Propeller imbalance can lead to vibrations, noise, and increased wear in UAVs, affecting overall performance and component lifespan. In the article Propeller Balancing Standards for Drones, Tyto Robotics discusses how the ISO 21940-11:2016 standard defines the assessment and management of rotor imbalance, replacing the earlier 1940:1-2003 version.
The article outlines the key principles behind the standard, including definitions of residual imbalance and how it relates to rotor mass and speed.
Tyto Robotics also breaks down the five methods specified by ISO for determining permissible residual imbalance. These range from standardized balance quality grades based on industry experience to approaches focused on limiting bearing forces and vibrations. The article explains how different methods are suited to different operational contexts, depending on the availability of rotor-specific data.
A summary table gives a clear view of balance quality grades and typical applications, with UAV propellers usually falling into the G 6.3 category. This ensures a balance between performance and wear protection. The article closes by inviting further questions from readers interested in propeller balancing standards.
For readers looking to understand how and why UAV propellers are balanced to specific tolerances, and how ISO standards apply, the full article provides a detailed and structured explanation.
