Traditional Gori propellers fold automatically when the engine is off to reduce drag, but they were not optimized to spin freely and generate electricity. The Hybrid Propeller solves this problem ...

Abel Ortega Jr., a participant carrying a folded American flag, and two others on a pole, marched in honor of his father, Abel F. Ortega, a Bataan March survivor. The folded flag Ortega Jr.

PteroDynamics has now patented a new design that leverages the propellers in all flight modes and can fold the wings around the fuselage. Its wings stretch out in the cruise phase of flight and ...

This is the approach [Carl Bugeja] took with his Spherical Folding Propeller design which he has entered into the Open Hardware Design Challenge category of The 2018 Hackaday Prize. While at rest ...