Hypersonic passenger jet

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Johnnnnn
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Hypersonic passenger jet

Post by Johnnnnn » Wed Feb 06, 2008 8:40 pm

bipedalhumanoid
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Re: Hypersonic passenger jet

Post by bipedalhumanoid » Wed Feb 06, 2008 11:21 pm

Johnnnnn wrote:Hypersonic passenger jet

http://news.bbc.co.uk/1/hi/england/oxfo ... 228341.stm
Holy crap. I'd pay anything to be able to do that. My trips home generally take in excess of 26 hours :(
Marcas
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Post by Marcas » Thu Feb 07, 2008 1:07 am

“Disobedience, in the eyes of anyone who has read history, is man’s original virtue. It is through disobedience that progress has been made, through disobedience and rebellion.”

- Oscar Wilde
CitizenPaine
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Post by CitizenPaine » Fri Feb 08, 2008 1:14 pm

From the article:
Current research, however, focuses on sustained hypersonic manned flight within the Earth's atmosphere, which has not yet been achieved.
I wonder has that anything to do with the fact that such speeds in the atmoshere always result in the object being, well, burned up? Interestingly, the article also mentions Concorde. Just remind me - why are we no longer using that machine?

CitizenPaine
The moving finger writes; and, having writ,
Moves on: nor all thy Piety nor Wit
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Nor all thy Tears wash out a Word of it.

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Colin
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Post by Colin » Mon Feb 11, 2008 11:08 am

Because it crashed once. Which may not sound huge, but when you take into account that the Boeing 737 does more passenger miles per week than the Concorde did its entire life, that is a pretty bad statistic. Added to that the huge cost of maintaining a 1970s aircraft, it never boded well for the Concorde.
micfur
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Post by micfur » Mon Feb 11, 2008 4:13 pm

Concordes fate was sealed early on in its career I believe. When it came into service and people on the ground realised the noise pollution it would cause, it resulted in multiple world wide bans from flying over significant land areas on a scheduled basis. This decimated its market and in the end the only 2 countries who used it were its inventors. And they only used it over the ocean, London-New York and Paris-New York.

I'm not sure this Hypersonic jet (if indeed it is a jet) will not have the same problem. Unless it flies so high that the air is thin enough to fail to carry the noise. In which case the wing design will need to be super efficient at those altitudes. It still leaves the problem with the time getting to cruise level and back down again at normal, quieter, speeds. Even late in Concorde's career it was subject to a successful law suit by people in Devon in South West England that meant it had to throttle back 15 mins earlier than previous as it approached the coast of the UK. This, naturally, added minutes to the flight which eats away at its competitive advantage.
Johnnnnn
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Post by Johnnnnn » Tue Feb 26, 2008 12:02 am

Marcas wrote:Nah, this is the way to travel!
http://en.wikipedia.org/wiki/Maglev_tra ... 2006_crash
Yeah, the maglev trains look fairly cool. I reckon the train itself would be the least expensive part.
As for the maglev train track, it seems to be fairly costly for the track. But even before laying the train track, land is required for the route that the track will take and this needs to have a low curvature for such a high speed train.

If Ireland is to aim towards getting a high speed train of any sort, it could start by planning and making provisions for acquiring the land needed for suitable routes for laying down track with low curvature.

Maybe in years to come!

But, the point is, what the hell are those useless politicians doing... :roll:
Gar
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Post by Gar » Tue Feb 26, 2008 1:15 pm

I read an article there recently about how Branson was thinking about using SpaceShipTwo for long distance commuting

http://en.wikipedia.org/wiki/Scaled_Com ... aceShipTwo

and if anyone wants to read about hypersonic jets, the technology they normally use are SCRAMJet's

http://en.wikipedia.org/wiki/Scramjet

it's basically a Jet engine that doesn't use a compressor at the front of the engine thus enabling them to work at very high velocities
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