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 propeller — a relic from the dawn of powered flight more than a century ago — is making a comeback as an emblem of aviation’s greener future. Rotors are proliferating on futuristic air taxis and ...

Sharrow knew it had a market disruptor on its hands the instant it transformed propeller blades into more efficient twisted loops. The hold-up of that disruption, however, has been in getting those ...

The problem of components not conforming to their claimed specification is one that must challenge engineers in all fields, including it seems, that of multi-rotors and remote controlled aircraft. A ...