with the missile sped down the cylinder,there will be sufficient launch velocity to sustain its further travel towards the target once the propelling gas ceases acting upon it at the end of the tube
The high-pressure gas introduced behind the projectile, accelerates it down the length of the tube
with The high-pressure gas,there will be sufficient launch velocity to sustain its further travel towards the target once the propelling gas ceases acting upon it at the end of the tube