US Patent Issued on Jan. 20 for "High-efficiency electric torque arm drive for unmanned helicopters" (Virginia Inventors)

ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,528,604, issued on Jan. 20.

"High-efficiency electric torque arm drive for unmanned helicopters" was invented by Dawei Dong (Petersburg, Va.) and Dawit Haile (Petersburg, Va.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An unmanned helicopter with a rotor disc area expanded to twice that of conventional multi-rotor drones to maximize lift generation under low Reynolds number conditions is described. Aerodynamic efficiency is further improved via airfoils known for their high lift performance in thin atmospheres. A four-blade rotor configuration with low solidity is used to minimize weight while optimizing performance. To facilitate deployment, the hel...