Aero Systems Engineering, Inc.

Fluidyne Engineering Corporation

John J Lacey, Jr

Bruce C Lindahl

George J Streithorst

Hallock F Swift

An open jet wind tunnel having a test section, a nozzle exit and a collector in which the leading edge of the collector is configured with at least a portion being non-uniformly spaced from the nozzle exit.

Wind tunnel and collector configuration therefor

A free piston shock tube/tunnel and a diaphragm construction for a free piston shock tube tunnel in which the diaphragm is provided with multiple rupture areas.

Diaphragm construction for free piston shock tube/tunnel

A free piston shot tube tunnel having a high speed valve for releasing the piston to start the piston shot. A further feature of the present invention is a free piston shock tube/tunnel having a high speed valve for releasing pressure from the compression tube into the shock tube.

Valve assembly for free piston shock tube/tunnel

A free piston shock tube/tunnel having a mechanism for stopping the piston or controlling the movement of the piston near the diaphragm end of the compression tube. The mechanism includes a generally annular protrusion positioned at the diaphragm end of the compression tube and extending upstream from the diaphragm to engage the piston at a point where the velocity of the piston is substantially at a minimum. The annular protrusion is spaced inwardly from the compression tube and has an inner diameter greater than the diameter of the shock tube.

Piston stop for free piston shock tube/tunnel

A free piston shock tube/tunnel having a mechanism for increasing the holding time, without correspondingly increasing viscous losses in which the shock tube/tunnel includes a diaphragm positioned in the area of connection between the compression tube and the shock tube and a selectively replaceable orifice insert positioned near the diaphragm in which the orifice insert has an opening with a diameter less than the internal diameter of the shock tube.

Growing community of inventors

Minnetonka, MN, United States of America

John J Lacey, Jr