Parachute tester A. A. Petrenko in the plane with cadets before parachute jumps; AA Petrenko, aeroclub cadets parachute jumping. Interview with a cadet about his first parachute jump (synchronously). AA Petrenko instructs paratroopers before parachute jumps. Interview with the designer of parachutes NA Lobanov (synchronously). NA Lobanov observes the flight of the parachutist Chizhik, congratulates him on the successful test of the first parachute. A. A. Petrenko and other parachute testers train in a pressure chamber.