Army SBIR test results indicate the FPS is the most silent propulsion method in the skies

Jetoptera has conducted a series of tests to measure the noise signature of its patented 200 lbf- class Fluidic Propulsive System (FPSTM) thrust augmentors as a subcontractor to Paragrine Systems, under a United States Department of Defense-funded research collaboration. The testing compared the Jetoptera FPSTM to a conventional reciprocating engine-driven propeller propulsion system and found [...]