Abstract: Recoilless launch can reduce recoil effectively, but causing the problem of low initial velocity. To resolve the conflict between gun power and recoil force, reverse jet recoilless scheme based on combustible cartridge and electromagnetic induction ignition is proposed. Energy is transmitted to the ignition head through electromagnetic induction, which ignites the fast-burning propellant and combustible cartridge in the chamber to provide energy. After reaching the pressure, the Laval nozzle is opened, and gas is sprayed backwards to balance the forward charge of the projectile. High initial velocity recoilless launch has high loading density, high chamber pressure, and is prone to instability in the interior trajectory. A classic interior ballistic model was established during the shooting process, and numerical simulation was used to analyze the interior ballistic performance and study the interior ballistic stability. We conducted ballistic test research and verified that this scheme can reduce the recoil impulse to below 1.5N?s without reducing the initial velocity of the projectile. The scheme can provide new ideas for the future development of light weapons.

Key words: Recoilless gun, Interior ballistics, Electromagnetic induction ignition, Combustible cartridge cases.