These strangely-shaped twisted-loop propellers look like a revolutionary (sorry) advance for the aviation and marine sectors. Radically quieter than traditional propellers in both air and water, ...

The propellers of the world's ships and boats create a constant drone that disrupts ocean life. New propeller designs based on loops could one day quiet that drone and be more fuel efficient. Sharrow ...

We live in an age of military jet engines and have since the tail end of World War II. For the most part, the majority of commercial and military aircraft are powered by jet engines, but some planes ...