Roots blowers hold in Runway Gen-4.5 silent; do not invent a howl
Runway Gen-4.5 is audio false, 50cr, 5s or 10s: lobe motion on the photographed blower. Do not generate a howl, and do not redraw timing-gear ratio. This is not vacuum-pump-oem's Torr overlay and not rotary-vane-oem's blade sweep.