lets add up all the forces that apply.
as the air is escaping from the tank.

the ends of the tank

114.7 psi --->
114.7 psi <---

the ends of the pipe

14.7 psi --->
14.7 psi <---

the rear of the nozzle as the air enters the nozzle

114.7 psi --->
14.7 psi <---

the front of the nozzle as the air escapes the nozzle

114.7 psi --->
14.7 psi <---

action = reaction

net result of force to pipe 100 psi <---

nothing is gained inside the pipe , nothing is lost inside the pipe except the energy that was put into compressing the air , but the pipe moves.

I would wager that the exact amount of energy that is is held in the compressed air ( due to its compression ) inside the tank is the exact amount of energy that is applied for propulsion of the pipe.






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3/4 inch of dust build up on the moon in 4.527 billion years,LOL and QM is fantasy science.