Quadcopters tend to have very poor efficency because of their high disk loading. High disk loading– that is, how much weight each square meter of area swept by the propellers must carry–is almost ...

Kongsberg Maritime has been hired by Consórcio Marenova to design and equip four methanol- and ethanol-ready handy-size product tankers for Petrobras Transporte (Transpetro).The vessels will be built ...

Barring the smallest manned airplanes, most aircraft that are pulled around by a prop have variable pitch propellers. The reason for this is simple efficiency. Internal combustion engines are most ...

Controllable-pitch propellers have been developed and produced on the Baltic coast of Germany since 1962 – initially in Rostock, and then in Wismar from 1964. The first units were manufactured for 86 ...

During my 30-plus-year history with this magazine, reader queries about propellers have remained constant and unrelenting. Questions that once came in letters and phone calls now arrive digitally, but ...

When it’s time to buy a new propeller for your boat, diameter and pitch are the most important characteristics to research. To be able to select or upgrade to a new propeller, you must understand ...