To demonstrate the conversion of subsonic to supersonic flow, Prof. French and his team designed the gun shown above. The end of the pressure vessel is sealed with laminating tape. Both the nozzle ...

The variable exhaust nozzles regulate the back pressure and velocity (based on the Venturi Effect, the higher the pressure, the lower the velocity and viceversa at subsonic airflow; the opposite ...

For years, Mark French has been using the regular subsonic version of the gun to ... modified the gun with a convergent–divergent nozzle, the type used in rocket engines and supersonic wind ...

The Russian Su-47 “Berkut,” an experimental fighter jet from the late 1990s, featured a distinctive forward-swept wing design aimed at achieving superior maneuverability, particularly at high angles ...

Recently, a group of students at Purdue University used a simple device to make a ping-pong ball break the speed of sound. But that’s not the coolest part. The device they used, called a de ...

The nozzles were being “choked” by a shock ... engineers employed an aerodynamics principle that was then little used. In subsonic wind tunnels — the type you might see your local TV ...

In its latest round of small-business solicitations, the Pentagon’s Special Operations Command, or SOCOM, is seeking out subsonic ammunition. The reason, according to the solicitation ...