[ALIBI]

Wild guess. The air flow is restricted by the regulator, tubing and valves. Think about heart bypass surgery and multiple cylinders. To conserve air we limited air consumption by using multiple pressure regulators for those applications that did not require 60psi in the past. You can use up to 4 Clippard Receivers. Could you get max airflow by having 4 cylinders on your launching mechanism? Fill 4 Clippards in parallel from the compressor. Have a regulator-valve-cylinder off from each clippard and then fire all 4 valves simulatainiously? It would then be up to you to determine stroke and bore that works for your application. I have only looked at the Typical Pneumatic Circut and I do not know if more than one Norgren Regulator at 60psi is permitted (we used Monnier regulars downstream of the Norgren). R88 seems to say that this is possible. This solution would do a lot of damage to your weight budget, but it seems plausable. Could you end up in a place where the valves are fighting eachother to fire? This should be easy enough to prototype and find out.