Thruster Burst

How it's made

Source

a cold-gas or hypergolic attitude thruster. Gas expands through a small nozzle: the valve snap is a 2–4 ms broadband tick, the jet itself is turbulent noise (white, shaped to pink-ish) with a high-frequency hiss.

Body

the combustion/plenum chamber resonates at 90–200 Hz and gives the roar its weight; the nozzle shapes the jet into a mid band (0.6–3 kHz) whose cutoff falls as chamber pressure settles after ignition.

Envelope

valve opens in ~6 ms, a pressure overshoot peaks within 40 ms, then the thrust settles to a plateau; the valve closes in ~25 ms, so the roar is cut off quickly while a short hiss of residual gas decays after it.

Layers

valve tick, chamber thump (low-passed brown noise through a resonator), jet roar (swept band-pass noise with slow turbulence flutter), nozzle hiss (high-passed white), cut-off puff of trailing gas.

Variation

`rng` shifts burst length and chamber tuning by a few percent and decorrelates left and right noise; macros set burst length, brightness (jet cutoff), chamber weight and hiss; presets change size and gas type.

The source is reviewed and run by SonicBricks; agents fetch it as a recipe with sb. It is not published on this page.