The enclosures I spoke of were tuned to the same frequency. The vents were not the same physical length - that was another of Haunz's random speculations.

15m/s is a nice goal for vent velocity but that is often exceeded in our hobby. I often see designs that exceed 10% of mach.

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Paul Niwranski
1966 Cadillac Superior Crown Royale Limousine Hearse

If you're mirrors ain't shakin...you got taken...
RIP Member #8
Be careful what you wish for...