The Air Gun works like a giant gas spring. The component to be tested is secured into a 5.5” diameter aluminum Product Piston (4.75” I.D.), instrumented with an accelerometer, inserted into the gun barrel and set at a predetermined distance (Typically 3’ to 4’).
The Pusher Piston is then fitted with an O-Ring gasket and inserted into the breech portion of the Air Gun. Helium gas is introduced into the space between the (2) two pistons and the Muzzle is pressurized to approximately 25 PSI with low pressure nitrogen.
The Breech Block and Locking Ring are attached to the Breech. The Breech is then charged to the required Fire Pressure (2, 000 PST to 6,000 PSI).
The Data Acquisition System is armed and a Trigger Pressure is applied to the Pusher Piston, breaking the Breech Fire Pressure Seal propelling the Pusher Piston down the barrel.
The Helium Gas is compressed, imparting the energy to the Product Piston. Both Pusher and Product Piston accelerate down the Muzzle generating velocity changes greater than 500 ft per second.
The maximum acceleration is attained and the data is acquired by the Transient Capture Data Acquisition System. The accelerometer cable is snapped at the 17’ mark of the 120’ Air Gun Muzzle.
Both Pistons continue down the Muzzle, compressing the low pressure nitrogen to a point where they reverse direction. Both Pistons rebound back towards the breech where they can be retrieved with a long “T” handle.
The Shock Profiles can be customized by modifying variables such as breech pressure, breech pressure discharge pattern and loading distance. Shock Pulse levels can typically be maintained to +/- 10%.
Fixture design / fabrication services and three (3) Product Piston sleeve lengths of 10”, 13” and 24” are available to accommodate your product.