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Influencing Factors of Parachute-non-Bomb Trajectory in the Fuel-Air Explosives

The parachute system has been widely applied in modern armament design, especially for the fuel-air explosives. Because detonation of fuel-air explosives occurs during flight, it is necessary to investigate the influences of the parachute-non-bomb drop process on flight characteristics to ensure successful dynamic detonation. In this paper, the major characteristics of parachute-non-bomb phase were explored with airdrop. Based on the influences, the equations for parachute-non-bomb trajectory were established to predict the position of parachute-non-bomb. The characteristics of parachute-bomb and parachute-non-bomb process were analyzed and discussed. The analysis results showed that the parachute-bomb, including parachute and bomb component, swung periodically in the falling stability phase and the parachute-non-bomb trajectory was a straight line toward an angle. The attitude angle, parachute-non-bomb velocity, and delay time were the major influencing factors of the parachute-non-bomb trajectory. Parachute-non-bomb velocity was less than parachute-bomb velocity. The parachute-bomb velocity was35.73m/s, which was 3.53 m/s less than that of the parachute-non-bomb velocity, 32.2m/s.