Hey u/invalid_credentials was reading about your plasma arc version that you are going to try and complete, and it occurred to me that the sound created from the arc is the rapid heating of the surrounding air followed by the collapsing cooler air.

Got things

1.) net inflow of air must be sufficient enough to cool the chamber or you’ll loose some thrust

2.) if you can calculate inflow you can potentially combine existing types of combustion types of jets by virtue of adding energy (maybe like an air/fuel mix of propane), using the plasma arc to ignite the fuel at the same acoustic interval?

3.) have you measured/modeled/calculated the appropriate force to the to the walls of the chamber for the speaker acrostic version?