We introduce the funnel rotor. It is designed to extend the hovering time of the rotorcraft on one battery charge. More.
SH Engine stands for Symmetric Hypocycloidal Engine. It is light, frictionless internal combusion engine. Due to lack of friction between its piston and its cylinder, it can be very efficient. More.
We provide an analysis of propulsion and fuel savings given by a sail on a ship. See here.
A No-Tilt Sail is specially designed so it does not make the ship tilt, regardless of the size of the sail, or the direction or strength of the wind. More.
The two-form bike is a convertible bicycle that can be configured in an upright or recumbent position. It takes just a minute to change from one design to the other. More.