Category: Propellers

Pusher-Prop Quad Will Save the Ceilings

In the early days of aviation, planes used pusher propellers. A pusher prop is typically behind the wing, and the concept probably came from boating, with the ship’s screws located on the stern to push the vessel through water. It took a few years for aerospace engineers to realize that puller props (mounted on the nose of the airplane) were superior because they spun through clean, not dirty air. The air behind the wing is […]

Improved VTOL Coaxial Blades

The Osprey is a problematic animal. Not the bird, the aircraft. It took many years and 36 lives (to date) to design a tilt-propeller ship that can take off like a helicopter and fly like an airplane. What if there is a better design? King Abdullah of Jordan thinks so. A recently-granted US Patent discloses a VTOL vehicle that can take off like a helicopter and presumably fly like a plane. The design, using coaxial counter-rotating […]

Draganfly Propellers Remove Easily, Folding Drone Ensues

Clockwise prop for the clockwise motor, counterclockwise prop for the counterclockwise motor Patent.

Parrot’s Bebop Prop Patent

Parrot, the French company that gave us the precursor consumer drone, has filed for a patent application on propeller mounting means. I know first-hand the frustration of seeing a prop fly off a spindle in mid-air, where it goes nobody knows, but it’s somewhere in the lawn. The bird in question is the new Parrot Bebop ( and it is fabulous. This invention at hand offers the following advantages: 1) Weight distribution of the prop […]