Kosin store outdoor sound systems

more at scitech.quickfound.net "LIFE SUPPORT TRAINING SCHOOL PRESENTS TRAINING PROGRAM OF AEROSPACE DEFENSE COMMAND'S (ADC) PARACHUTE JUMP SCHOOLS. SIMULATES INDOOR AND OUTDOOR JUMPS USING UNIQUE EQUIPMENT. INTRODUCES SWING-HARNESS TRAINING WITH ELEMENT OF SURPRISE TO PREPARE CREWMEN FOR PARACHUTE DRAG. REVIEWS WATER LANDING AND RAFTING PROCEDURES. COVERS PARASAILING AS FINAL TEST IN SIMULATING ACTUAL JUMP." US Air Force film FR-869 Public domain film from the National Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and mild video noise reduction applied. The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original). en.wikipedia.org In aircraft, an ejection seat is a system designed to rescue the pilot or other crew of an aircraft (usually military) in an emergency. In most designs, the seat is propelled out of the aircraft by an explosive charge or rocket motor, carrying the pilot with it. The concept of an eject-able escape capsule has also been tried. Once clear of the aircraft, the ejection seat deploys a parachute. Ejection seats are common on certain types of military aircraft... A bungee-assisted escape from an aircraft took place in 1910. In 1916 Everard Calthrop, an early inventor of parachutes, patented an ejector seat using compressed air. The modern layout for an ejection seat was first ...