Simviation Forum - What is the fastest Civil Airliner flying today??

Feb 8^th, 2005 at 11:36am

supernova45849850l Offline
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just curious as to which civil airliner is the fastest.

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Reply #1 - Feb 8^th, 2005 at 11:39am

eno Offline
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The Boeing 747...... I can't remember the speed but I'm sure someone will provide it.

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Reply #2 - Feb 8^th, 2005 at 12:08pm

chomp_rock Offline
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The Boeing 747-400 is the fastest airliner with a long-range cruise speed of 490kts and a max cruise speed of 507kts.

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Reply #3 - Feb 8^th, 2005 at 1:52pm

jimclarke Offline
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I heard on a documentary that the 747 has broken mach 1 in tests. Maybe someone out there can verify this.

Jim

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Reply #4 - Feb 8^th, 2005 at 2:49pm

Mr. Bones Offline
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Quote:

I heard on a documentary that the 747 has broken mach 1 in tests. Maybe someone out there can verify this.

Jim

Indeed, but that was during a dive (got it from Discovery Channel) Wink

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Reply #5 - Feb 8^th, 2005 at 6:01pm

TacitBlue Offline
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wow, I wonder if they could give it bigger engines, and cruise at mach 1?

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Reply #6 - Feb 8^th, 2005 at 6:05pm

Craig. Offline
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No.
Not aerodynamically designed to go mach 1. its only possible in a dive, and doesnt exactly do the airframe any good.

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Reply #7 - Feb 8^th, 2005 at 6:10pm

C Offline
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Quote:

No.
Not aerodynamically designed to go mach 1. its only possible in a dive, and doesnt exactly do the airframe any good.

..or the worlds oil reserves... Grin

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Reply #8 - Feb 8^th, 2005 at 6:48pm

Nexus Offline
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The parasite drag will greatly increase when the aircrafts exceeds mach1.
The rather blunt nose of the 744 will lead to energy consuming bow shocks (=drag), which are a combo of a normal and oblique shock waves, not to mention the high cambered wings (shockwaves again) and relative low sweep angle (compared to the concorde) which are ill-suited for supersonic flight.

A normal subsonic wing has the centre of lift about one foirth chord line back from the leading edge, which basicly means the wing produces 50% of the lift by that point. As the wing approaches mach 1, the centre of lift moves farther back. So we need more speed to make up for the lack of lift, but the Mach drag rise will prevent the 744 to go supersonic in level flight.

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Reply #9 - Feb 8^th, 2005 at 7:23pm

Rocket_Bird Offline
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Ive heard a China Airline's 747 went mach 1 once. Im not sure if it actually went THAT fast, but apparently, they were flying to california across the ocean, during descent, the pilots forgot to disengage the autopilot, the thing stalled, dove, oversped big time, and the pilots pulled like 7 G's out of it to recover Shocked

. They got it on the ground with an extremely bent airplane, bloody ears, and a bunch of passengers who probably want their money back. Grin

I just got the story from one of my teachers so i cant say the facts... Grin

Cheers,
RB

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Reply #10 - Feb 8^th, 2005 at 7:32pm

Nexus Offline
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Anybody know the ultimate load factor on the 744?
7 g's sounds ridiculously much, but then again I'm not an engineer Grin

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Reply #11 - Feb 8^th, 2005 at 7:43pm

Craig. Offline
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http://www.ntsb.gov/ntsb/brief.asp?ev_id=20001214X35672&key=1
guessing thats the incident.

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Reply #12 - Feb 8^th, 2005 at 7:45pm

Craig. Offline
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http://www.airliners.net/open.file/162693/M/
thats the plane.

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Reply #13 - Feb 8^th, 2005 at 8:34pm

TacitBlue Offline
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Is it just the wide angle lense, or is that 747 shorter than normal?

A&P Mechanic, Rankin Aircraft 78Y

Aircraft are naturally beautiful because form follows function. -TB

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Reply #14 - Feb 8^th, 2005 at 8:36pm

Nexus Offline
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Yeah the lense screws up the angle, but that particular 747 is the SP (stands for Special Performance I believe) version, which is considerably shorter than its siblings

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