Branson unveils supersonic jet faster than Concorde

[CAPSLOCKSTUCK]

Nicknamed the "Baby Boom", the XB-1 Supersonic Demonstrator, which looks likes a mini Concorde, is expected to have its first test flight next year in Southern California. The airline tycoon has confirmed that Virgin has options to buy 10 of the recently revealed supersonic Boom jets, which will be capable of flying at 1,451mph - about 100mph faster than Concorde - and reaching New York from London in three and a half hours.

http://news.sky.com/story/baby-boom-branson-unveils-supersonic-jet-faster-than-concorde-10659228

The subscale XB-1 'Baby Boom' jet (pictured top) is set to pave the way for the larger Boom Passenger Airliner (pictured bottom)


XB-1 SUPERSONIC DEMONSTRATOR SPECS
- Crew: Two (pilot + optional flight test engineer or passenger)

- Length: 68'

- Wingspan: 17'

- Maximum Takeoff Weight: 13,500 lb

- Powerplant: 3X General Electric J85-21, non-afterburning; proprietary variable-geometry intake and exhaust

- Aerodynamics: Chine, refined delta wing with swept trailing edge

- Cruise: Mach 2.2 (1,451mph, 2,335 km/h)

- Nose Temperature: 307°F (345°F on ISA+20 day) Range: > 1,000nmi



BOOM PASSENGER AIRLINER SPECS
- Crew: Two

- Length: 170', Wingspan: 60'

- Passengers: 45 standard (up to 55 in high density)

- Flight attendants: Up to 4

- Lavatories: 2

- Powerplane: 3X non-afterburning medium bypass turbofan; proprietary variable geometry intake and exhaust

- Aerodynamics: Chine, refined delta wing with swept trailing edge Long Range

- Cruise: Mach 2.2 (1,451mph, 2,335 km/h)

- Nose Temperature: 307°F (345°F on ISA+20 day) Maximum Design Route: 9,000nm (4,500nm unrefueled)


Bloomberg

 

[Vario]

Wow looks fun to fly

 

[dorsetknob]

I Now Expect Congress to Rescind the Ban on Supersonic Flight over / in USA Sovereign Air Space
Now there is a planned US Supersonic Passenger Carrier Aircraft.
Otherwise its a total waste of Time and it will suffer the Same Restrictions that the US Tried to Cripple Concord with ( because they could not Compete as they had no capable Aircraft of their OWN )

 

[FordGT90Concept]

Looking at the first picture, I thought "that's too small" and seeing the second picture, I thought "that's more like it."

I Now Expect Congress to Rescind the Ban on Supersonic Flight over / in USA Sovereign Air Space
Now there is a planned US Supersonic Passenger Carrier Aircraft.
Otherwise its a total waste of Time and it will suffer the Same Restrictions that the US Tried to Cripple Concord with ( because they could not Compete as they had no capable Aircraft of their OWN )

They will not. Sonic booms sound a lot like gun shots which inevitable triggers emergency phone calls. That limitation isn't going anywhere.

 

[CAPSLOCKSTUCK]

Despite the ban, in May 1976 flights were allowed into Washington Dulles International Airport. When the Federal ban was lifted at John F. Kennedy International Airport (JFK), New York City imposed its own ban. Nine months later, a Supreme Court ruling allowed flights into JFK.

 

[FordGT90Concept]

As long as they go supersonic over the ocean, it's not a problem. The boom only occurs during acceleration.

 

[W1zzard]

The boom only occurs during acceleration.

As long as you fly supersonic the boom will follow you on the ground.

Source: visited Concorde in NYC last month

Spoiler

 

[CAPSLOCKSTUCK]

because they could not Compete as they had no capable Aircraft of their OWN

the campaign to impose restrictions globally were initiated by a primary school teacher, conscientious objector and vegan from Letchworth, Hertfordshire.

https://en.wikipedia.org/wiki/Anti-Concorde_Project

 

[m1dg3t]

As long as you fly supersonic the boom will follow you on the ground.

Source: visited Concorde in NYC last month

Spoiler

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Ya, not like you stop moving through the air once you accelerate

 

[Nosada]

As long as they go supersonic over the ocean, it's not a problem. The boom only occurs during acceleration.

Actually, the sonic boom is caused by the accumulation of sound waves by going faster than the speed of sound, and thus does not just happen at the moment you go from high subsonic to trans-sonic to supersonic. Wherever an airplane is going supersonic, you will hear absolutely nothing as it flies overhead, only to be bombarded with the sonic boom once its bow wave reaches you and the usual engine/flight sounds afterwards.

You also hit the nail on the head why supersonic will probably never be economically feasible again: if you build an airplane for supersonic speeds, it's going to be guzzling fuel at subsonic, not being able to go supersonic above land ruins its economy AND its speed advantage, not to mention makes it completely useless for about 90% of flights worldwide, as very few routes are predominantly over water.

 

[dorsetknob]

The boom only occurs during acceleration.

ONE Boom To Startle them many to Follow
Over the Flight path of a Supersonic Flight there is A constant Stream of Booms SEE
Nosada POST ABOVE

 

[CAPSLOCKSTUCK]

As long as you fly supersonic the boom will follow you on the ground.

Source: visited Concorde in NYC last month

Spoiler

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fabulous pics.
I had unrestricted access to aircraft at Heathrow when i worked there. I used to go and " have a little play" on Concorde on night shifts.....

 

[FordGT90Concept]

Learn something new everyday!
http://earthobservatory.nasa.gov/IOTD/view.php?id=86742

Mach number just changes the angle of the wave. The faster, the lesser the degree of the angle.

All aircraft produce at least two pressure waves:

1. N-wave as it expands around the aircraft.
2. U-wave as it collapses around it filling the vacuum created by the moving mass.

They always join into one wave given enough distance. Unless the aircraft is really close to the ground, really big, or manuvering, you'll only hear one boom.

 

[dorsetknob]

They always join into one wave given enough distance. Unless the aircraft is really close to the ground, really big, or manuvering, you'll only hear one boom.

Yeh Really
If you were to Travel in the Path following A supersonic Aircraft at a relativistic Speed So there is only a couple of miles Speed Difference
You Would hear a series of Booms Gradualy increasing in their delay / further apart/ (Due to doppler Shift ).

 

[FordGT90Concept]

@CAPSLOCKSTUCK posted a good video. Only one of all of them had two booms (1:17). That segment of the video isn't good enough to tell why.

 

[dorsetknob]

from wilki
There is a rise in pressure at the nose, decreasing steadily to a negative pressure at the tail, followed by a sudden return to normal pressure after the object passes. This "overpressure profile" is known as an N-wave because of its shape. The "boom" is experienced when there is a sudden change in pressure; therefore, an N-wave causes two booms – one when the initial pressure-rise reaches an observer, and another when the pressure returns to normal. This leads to a distinctive "double boom" from a supersonic aircraft. When the aircraft is maneuvering, the pressure distribution changes into different forms, with a characteristic U-wave shape.

Since the boom is being generated continually as long as the aircraft is supersonic, it fills out a narrow path on the ground following the aircraft's flight path, a bit like an unrolling red carpet, and hence known as the boom carpet

so not one boom but a series

 

[FordGT90Concept]

No series, at most two (n-wave then u-wave), as it says. Example:
http://www.military.com/video/space-technology/space-shuttles/double-sonic-boom/660621976001

Shuttle always did two because of its huge cross section at the tail (powerful U-wave).

 

[CAPSLOCKSTUCK]

When i was a child Concorde used to fly over my area then head out over the south of the Irish sea, . Our windows would rattle TWICE in quick succession. We used to call it "the nine o'clock bang"

 

[dorsetknob]

No series, at most two (n-wave then u-wave), as it says. Example:

If that is the laughable Case Then Explain how people in the Boom footprint Several 100's to thousands of miles apart hear a boom !!

And Don't Take the PISS by Saying its the Same Boom

 

[CAPSLOCKSTUCK]

we used to hear the boom from the New York flight about 12 minutes after it passed over us by which time it was about 120 miles away. If the wind was an easterly we wouldnt hear it at all.

 

[yotano211]

As long as you fly supersonic the boom will follow you on the ground.

Source: visited Concorde in NYC last month

Spoiler

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OMG you saw the concord at intrepid museum, I went 2 years ago and the concord was off limits. Overall the museum was a time waster for me. So many kids there ruining it for everyone, its like the museum was a play ground. They where touching this and that, running into restricted areas. I wanted to see the ship more but most of it is closed off. And some planes that I wanted to see also closed off. Biggest let down of a museum for me.

 

[CAPSLOCKSTUCK]

The Concorde at Intrepid is probably the most interesting out of the whole fleet.

G-BOAD (210) first flew on 25 August 1976 from Filton. Repainted with Singapore Airlines livery on the port side and British Airways livery on the starboard for a joint service by the two airlines between Bahrain and Singapore International Airport at Paya Lebar for three months in 1977, and from 1979 to 1981. This aircraft also set the fastest Atlantic crossing by any Concorde on 7 February 1996, taking off from New York JFK and landing in London Heathrow 2 hours, 52 minutes, and 59 seconds later. It departed from Heathrow for the final time on 10 November 2003.
G-BOAD spent more time in the air than any other Concorde at 23,397 hours.

 

[FordGT90Concept]

If that is the laughable Case Then Explain how people in the Boom footprint Several 100's to thousands of miles apart hear a boom !!

And Don't Take the PISS by Saying its the Same Boom

N-wave...U-wave...

The demonstrator in the OP will likely have a weak U-wave.

The Concorde at Intrepid is probably the most interesting out of the whole fleet.

G-BOAD (210) first flew on 25 August 1976 from Filton. Repainted with Singapore Airlines livery on the port side and British Airways livery on the starboard for a joint service by the two airlines between Bahrain and Singapore International Airport at Paya Lebar for three months in 1977, and from 1979 to 1981. This aircraft also set the fastest Atlantic crossing by any Concorde on 7 February 1996, taking off from New York JFK and landing in London Heathrow 2 hours, 52 minutes, and 59 seconds later. It departed from Heathrow for the final time on 10 November 2003.
G-BOAD spent more time in the air than any other Concorde at 23,397 hours.

What about F-BTSC...the one that caught on fire and lead to the end of Concorde service?

 

[CAPSLOCKSTUCK]

What about F-BTSC...the one that went boom and lead to the end of Concorde service?

That wasnt interesting, it was tragic.

The accident was caused by debris off a different aircraft and up to that point it was the safest passenger aircraft type ever.

 

[FordGT90Concept]

Fair enough.

Yeah, the DC-10 that took off before it was blamed for the damage to the Concorde. It has no fatalities prior to that.