3 ms·

Anyone else think about the Aurora spy plane fables from the 1990's? "strange, loud pulsating roar... unique... a deep pulsating rumble that vibrated the house

• na85 7y ago
  From TFA, the shockwaves released that are used to ignite new detonations travel at Mach 5 within the combustion can. At that speed, with the minute distances involved, I very much doubt this would sound like the Aurora was fabled to sound like. I think more likely it would sound like an amped-up version of the V1 Flying Bomb.
  • skykooler 7y ago
    Indeed. If the engine had a ring with a diameter of 1 foot, which seems reasonable compared to other rocket engine combustion chambers, a mach 5 detonation shockwave would circle the combustion chamber at 1.7 kilohertz, which is quite a high-pitched tone (though not as high as the whine of a jet engine).
• baybal2 7y ago
  > "strange, loud pulsating roar... unique... a deep pulsating rumble that vibrated the house and made the windows shake... similar to rocket engine noise, but deeper, with evenly timed pulses." Target drone? They often use pulsejets.
• robotnikman 7y ago
  Sounds like a Pulsejet engine.