Hi guys and girls! Here's a hard one I need help wit. I really want it resolved because I sincerely love it. There's an aerodynamic phenomenon called 'the Vulcan howl'. Example: It occurs when engines are employed at maximum power or more (maximum power in aircraft is only a recommended limit, in a problematic situation you can request emergency power from the system basically giving engines as much fuel and air as possible hoping they don't break). It's a reverberation caused by the configuration of the air intakes interacting with the air flow and pressure differentials. I'm wondering if it can be calculated, simulated or otherwise predicted if a certain air intake will generate sound under some conditions? I want to build a large model aircraft capable of making a Vulcan howl (higher pitch, of course). And no, scaling it down didn't work. Anyone know where to look for information on predicting this? Google has been of no help since I either end up with no results or results written by high-school level, self appointed professors. Please. Help me PhysicsForums, you're my only hope!