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Old Posted Oct 27, 2015, 5:22 PM
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Passenger plane concept could travel five times the speed of the Concorde

Passenger plane concept could travel five times the speed of the Concorde


Oct. 25, 2015

By CHARLES BOMBARDIER



Read More: http://www.theglobeandmail.com/globe...ticle26950644/

Quote:
The Skreemr is an aircraft concept that would be launched at very high speed with the help of a magnetic railgun launching system. Rockets would increase the aircraft speed enough to ignite its main scramjet engine, making it possible to reach speeds over Mach 10.

- The Skreemr would need to be launched from an electric launch system. This device would make it possible to accelerate the aircraft to high speed. This system would need to be long enough to achieve supersonic speed without taxing the passengers with too much g-force.

- The Skreemr would then ignite liquid-oxygen / kerosene rockets to rise up in altitude and reach a speed of Mach 4 (or maintain it after being released from the railgun). The plane would then ignite its scramjet engine and burn hydrogen and compressed oxygen to continue its acceleration.

- It might be possible to skip the rocket part which would be in use from maglev launch to the scramjet ignition, but this would depend on two things: the materials used to withstand the heat and pressure on the aircraft, and the acceleration that could be sustained by the occupants of the aircraft.

- The Skreemr would be used as a commercial aircraft to fly from one continent to the next. It would fly five times faster than the Concorde and it could carry around 75 passengers. The magnetic railgun could use clean electricity to launch the aircraft, and the rockets and scramjets could burn hydrogen manufactured with hydro-electricity.

.....








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  #2  
Old Posted Oct 27, 2015, 11:20 PM
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Originally Posted by M II A II R II K View Post
Passenger plane concept could travel five times the speed of the Concorde
Nice discussion about this plane/rocket taking off and cruising at altitude. But, what would power the plane/rocket as it approaches and lands? Will it have enough wingspan to glide? Will that wingspan be torn off when at maximum speed?

The Wright brothers didn't invent flight, there were gliders and powered gliders before them. They are credited being the first to have controlled flight, with the ability to control direction, altitude, and speed of their plane throughout the flight.

So, my questions about safe landing is very important. But not one word in this article discussed landing. So I remain unimpressed.
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Old Posted Oct 27, 2015, 11:41 PM
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Would work well for cities which are located next to a body of water and that body of water can used as a transit path - over land and sonic booms however?

i.e Melbourne-Los Angeles/San Francisco/Vancouver - a southbound take-off from Melbourne and from 15km into the journey you're over Port Phillip then theoretically the rest of the journey could be all over water / away from populated areas (land/take-off directly in over the beaches at LAX, in/out over SF bay for SFO and directly in/out over Juan de Fuca/Haro/Georgia strait for YVR.

A flight to Europe would probably have to go around all of Africa, to the East Coast of North America probably all the way around South America.
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Old Posted Oct 28, 2015, 12:50 AM
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Looks like the wings might fold out, like some fighter jets.
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Old Posted Oct 28, 2015, 2:42 AM
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Originally Posted by tayser View Post
Would work well for cities which are located next to a body of water and that body of water can used as a transit path - over land and sonic booms however?
From what Ive heard about modern aeronautics its possible to design a supersonic plane that has a negligible if not non existent sonic boom; but that was in the context of a modern day Concorde, which would be at most mach ~3, and not hypersonic like the Skreemr. After mach 5 the fluid dynamics changes enough to need different designs to function.

I wanna call this an impossible idea since to my knowledge the only things that have gone above mach 5 for sustained periods of time are spacecraft, a handful of missiles, and maybe various one off engine/flight test systems. In fact I going to say that we're still a few decades away from commercial hypersonic flight that isnt some form of suborbital flight like how Virgin Galactic plans to.
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Old Posted Oct 28, 2015, 4:00 PM
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They'll charge $100,000 a ticket, and none of those people will end up paying it out of their own pocket.
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