Posted on 07/11/2023 1:26:40 PM PDT by Red Badger
AVIATION PING!...........................
That sonic boom also represents wasted energy. If we can eliminate the sonic boom, perhaps fuel economy at supersonic speeds would go up.
The things I've learned on this forum over the past 25 years just keep increasing. That's one of the coolest and most interesting things I've read in a long time.
I've no idea how sonic boom translates into wasted energy but it sounds damn' cool to me!
ALWAYS my first question . . . . . . . why ?
It’s basically keeping a vacuum alive, so get rid of that vacuum and that energy is no longer wasted. Spread it across the upper part of the wings and generate lift instead.
I always wondered why fighters and bombers are so loud. Isn't it a waste of energy, or would it require more energy to silence them?
“...gather data on human responses to the sound generated during supersonic flight.”
My response is “NO WAY IN HELL do I want to hear a THUMP!”
This jet will be a fuel hog, so why work on it when other parts of the SAME government are starting to say “End all jet travel because jet suck up fossil fuels, warm the planet, white supremacy air travel, blah, blah, blah.”
Quieting jet engines (turbojet or turbofan) generally requires adding weight to them. That’s unnecessary weight in a combat aircraft that does nothing for combat capability. What I find interesting about them is the designers’ ability to direct the noise backwards. A jet fighter approching is almost inaudible to people on the ground ... when it passes overhead the sound goes from nil to deafening almost instantly. And no, it’s not because they’re supersonic.
Does your comment mean that you’re on the side of the “End all jet travel because blahblahblah” crowd?
Hardly. Just pointing out the extreme hypocrisy of our federal government with branches working at odds with each other...all the while wasting our money with their internecine warfare.
SUPERSONIC JET FUEL HOGS!! Yes. Get to your destination in half the time (why?)
END ALL FOSSIL FUELS!! Yes!!
That I understand, thanks!
“That sonic boom also represents wasted energy. If we can eliminate the sonic boom, perhaps fuel economy at supersonic speeds would go up.”
It’s true that the sonic boom represents waisted energy, as is the case for the bow wave on a boat. But unforntunatly, there is no way to eliminate the shock wave ahead of a supersonic aircraft, and therefore no way to eliminate the somic boom.
As I understand it, the goal of the X-59 is to spread out the shock wave somewhat to reduce the peak sound intensity.
Get to your destination in half the time (why?)
Have you ever flown across the Pacific?
It doesn't seem scaleable for commercial passenger flights.
This aircraft will enable John Kerry to get to his climate change meetings faster.
“Have you ever flown across the Pacific?”
Quite a few times. My favorite was leaving Guam on Pan Am back in the late 70s when the cabin had a few movie screens and you had the rubber tubes up to your ears. My seat was close to the screen and I didn’t have an eyeshade with me. The audio on the movie broke. The stews graciously announced “There’s no audio, but we are going to play the movie for you anyway.” So I had the damned flickering light of the movie in my eyes for two hours so I couldn’t get to sleep. I still remember that great trip.
“This jet will be a fuel hog, so why work on it when other parts of the SAME government are starting to say “End all jet travel…”
Because any commercial aircraft that results from these tests will ease the lives of the elites they serve. But then you knew that.
The Concord used an absurd amount of fuel to cross the Atlantic at Mach 2. About eight times the fuel per passenger than a 747 on the same route.
https://simpleflying.com/concorde-fuel-consumption/
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