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On a some what unrelated note, does anyone here know what the evolution of commercial planes is in terms of fuel sources?
Sources i've seen put non-traditional peak oil at 2030, so it would seem that by the time this technology is developed the fuel could be prohibitively expensive. Will alternative energies provide enough power for super sonic flight?
The jets are aimed to become available around 2025. On a some what unrelated note, does anyone here know what the evolution of commercial planes is in terms of fuel sources? Sources i've seen put non-traditional peak oil at 2030, so it would seem that by the time this technology is developed the fuel could be prohibitively expensive. Will alternative energies provide enough power for super sonic flight?
http://atwonline.com/eco-aviation/news/ten-airlines-agree-pu...
http://motherjones.com/environment/2008/01/virgin-airlines-p...
Why mutually exclusive? (just curious) What was the justification previously offered?
> it is possible to design configurations that combine low sonic boom with low cruise drag, characteristics once thought to be mutually exclusive Why mutually exclusive? (just curious) What was the justification previously offered?
But those big, single shock waves are, of course, perceived by the listener as a "boom".
The jets are aimed to become available around 2025. On a some what unrelated note, does anyone here know what the evolution of commercial planes is in terms of fuel sources? Sources i've seen put non-traditional peak oil at 2030, so it would seem that by the time this technology is developed the fuel could be prohibitively expensive. Will alternative energies provide enough power for super sonic flight?
In other words there is no change you can make to the plane. The only change is to the fuel source and that applies to everything, not just planes.
And don't try to predict peak oil - every single prediction ever made of it has been wrong. And not just a little bit wrong, wildly incorrect.
Every time we seem to run out of oil or natural gas we find more - known oil reserves have never been higher.
At 70PNLdB, I doubt anyone in their car could hear it. In fact pretty much only rural quiet areas will hear it. Though I'm sure there's going to be some "concerned citizens" that claim that the sonic booms are causing their children migraines, or something similar. Still, living at one end of Canada and having friends at the other end, I'm excited for the possibility quiet overland supersonic flight.
At 70PNLdB, I doubt anyone in their car could hear it. In fact pretty much only rural quiet areas will hear it. 70 PNL dB is fairly loud, it will be very noticeable in urban areas and extremely disruptive in rural areas. 65 dB Ldn is the target for normal aircraft and most experts agree that limit is way too high. The research represents a significant decrease in noise from supersonic aircraft, but we're a long way f…
Couple anecdotes: I work in a semi rural neighborhood that's 2km from a regional airport (a bit off to the side of the approach path). I work right next to a window and haven't once heard an airplane go by. Now, this might be due to our shielded glass and white noise generators in the ceiling, but that's not bad.
Second anecdote, there was an airport downtown on the water that was re-opening with an airline running Bombardier Q400s (Porter Airlines at Billy Bishop). There was a group of protesters that were claiming that the noise would ruin the quiet of a nearby spit. So on the launch day, before the sun rose, they gathered at the spit to protest. Unfortunately for them, they missed the first flight as their talking had drowned it out.
Maybe it's just because I lived next to the railroad tracks for 20 years, but I say, bring on the jets.
Don't editorialize the headline. The article is much more nuanced than the headline suggests and it belittles an amazing achievement.
At 70PNLdB, I doubt anyone in their car could hear it. In fact pretty much only rural quiet areas will hear it. Though I'm sure there's going to be some "concerned citizens" that claim that the sonic booms are causing their children migraines, or something similar. Still, living at one end of Canada and having friends at the other end, I'm excited for the possibility quiet overland supersonic flight.
Earlier quoted context omitted.
At 70PNLdB, I doubt anyone in their car could hear it. In fact pretty much only rural quiet areas will hear it. 70 PNL dB is fairly loud, it will be very noticeable in urban areas and extremely disruptive in rural areas. 65 dB Ldn is the target for normal aircraft and most experts agree that limit is way too high. The research represents a significant decrease in noise from supersonic aircraft, but we're a long way f…
Got any sources for that? I'm interested in reading that research. Couple anecdotes: I work in a semi rural neighborhood that's 2km from a regional airport (a bit off to the side of the approach path). I work right next to a window and haven't once heard an airplane go by. Now, this might be due to our shielded glass and white noise generators in the ceiling, but that's not bad. Second anecdote, there was an airport…
The jets are aimed to become available around 2025. On a some what unrelated note, does anyone here know what the evolution of commercial planes is in terms of fuel sources? Sources i've seen put non-traditional peak oil at 2030, so it would seem that by the time this technology is developed the fuel could be prohibitively expensive. Will alternative energies provide enough power for super sonic flight?
There isn't any difference between plane fuel sources vs cars or power plants. In other words there is no change you can make to the plane. The only change is to the fuel source and that applies to everything, not just planes. And don't try to predict peak oil - every single prediction ever made of it has been wrong. And not just a little bit wrong, wildly incorrect. Every time we seem to run out of oil or natural ga…