Engineers at NASA’s Dryden Flight Research Center have designed a partially reusable launch system to propel a payload-bearing spacecraft into a low Earth orbit (LEO).
This low-cost sound shield is capable of reducing the noise of aircraft traveling at subsonic speed. The technology injects a high–molecular weight gas onto the aircraft surface, producing a local area of supersonic flow. This blocks sound waves traveling in all directions without diminishing aircraft performance or efficiency.
Dryden's new method for reducing the drag of blunt-body vehicles calls for coarsening a portion of the forebody surface, which reduces base drag and total vehicle drag.
This new method and apparatus reduces loads on a helicopter tail boom to improve maneuverability. The innovation uses passive venting on the boom to alleviate side forces generated in hover and sideward flight as well as dynamic forces, including vibrations.