Air France flight disappears? - Page 17

seriousracer · 06-02-2009, 03:54 PM

terminal velocity it is 3 minutes if it is only 120mph.
if in fact it was in a glide it would be about 17 minutes. at 270 knots on 12:1.
http://www.csgnetwork.com/glideratiocalc.html

PirateJohn · 06-02-2009, 03:56 PM

Quote:

Originally Posted by EvilGenius

Does no one have large sea planes to investigate things like this anymore?

I don't believe that the US Navy nor the US Air Force currently flies any long range seaplanes, so I doubt if the Brazilians do either.

EvilGenius · 06-02-2009, 04:02 PM

Quote:

Originally Posted by wxwax

Glide? Three minutes is an awfully, awfully long time in an emergency.

Does the RAT power any of the communications equipment? I know PvtIdaho says getting on the horn is low on the list of priorities, but with three whole minutes and a ditching ahead, I would have thought one of the two pilots would have tried to get word out.

The abrupt loss of everything, including pressurization, is what brings to mind a catastrophic failure, the kind that precludes a controlled descent.

The RAT powers control surfaces, certain hydraulic features (landing gear/flaps?) and "Flight critical insturmentation". So I'm thinking if it's powering all that and the instruments than it should have enough left over for a radio.

In an attempt to be smart with a calc:

35,000ft / 5,280ft = 6.628mi above water

Lets say the plane was falling 200mph (nosedive maybe)

60min / 200mph = .3333min per mile

.333min per mile * 6.628 mi = 2.21 min to impact.

Based on my terrible math I'd say it probably glided a short distance before outright breaking up or diving in.

EvilGenius · 06-02-2009, 04:02 PM

Quote:

Originally Posted by PirateJohn

I don't believe that the US Navy nor the US Air Force currently flies any long range seaplanes, so I doubt if the Brazilians do either.

US Forest Service on the case!

Klay · 06-02-2009, 04:16 PM

Quote:

Originally Posted by PirateJohn

I don't believe that the US Navy nor the US Air Force currently flies any long range seaplanes, so I doubt if the Brazilians do either.

Off the top of my head, I can only think of the Japanese and Chinese still operating large seaplanes.

wxwax · 06-02-2009, 04:19 PM

Quote:

Originally Posted by Klay

Off the top of my head, I can only think of the Japanese and Chinese still operating large seaplanes.

You must have a very large head.

viajero · 06-02-2009, 04:21 PM

Quote:

Originally Posted by Klay

Off the top of my head, I can only think of the Japanese and Chinese still operating large seaplanes.

Doesn't Russia also have some sort of mammoth seaplane?

Klay · 06-02-2009, 04:21 PM

Quote:

Originally Posted by wxwax

You must have a very large head.

You finally noticed that?

wxwax · 06-02-2009, 04:21 PM

Quote:

Originally Posted by Klay

You finally noticed that?

Just not the aircraft.

Klay · 06-02-2009, 04:22 PM

Quote:

Originally Posted by viajero

Doesn't Russia also have some sort of mammoth seaplane?

I know they've experimented with ground-effect seaplanes, but I'm not aware of any that are operational. I'll check google.

wxwax · 06-02-2009, 05:03 PM

"From avherald.com

"New information provided by sources within Air France suggests, that the ACARS messages of system failures started to arrive at 02:10Z indicating, that the autopilot had disengaged and the fly by wire system had changed to alternate law. Between 02:11Z and 02:13Z a flurry of messages regarding ADIRU and ISIS faults arrived, at 02:13Z PRIM 1 and SEC 1 faults were indicated, at 02:14Z the last message received was an advisory regarding cabin vertical speed. That sequence of messages could not be independently verified."

http://www.airlinepilotforums.com/ma...issing-14.html

Mango Man · 06-02-2009, 05:09 PM

Tough way to go.

bradatlarge · 06-02-2009, 05:46 PM

An advisory regarding cabin vertical speed?

I read that to mean, wholly shit this thing is going faster than it should in a vertical manner.

PirateJohn · 06-02-2009, 05:51 PM

Quote:

Originally Posted by bradatlarge

An advisory regarding cabin vertical speed?

I read that to mean, wholly shit this thing is going faster than it should in a vertical manner.

Ditto. That's the way that I took it too.

And 4 minutes after the autopilot disengaged. Nasty. They must have been fighting it.

bradatlarge · 06-02-2009, 05:54 PM

as MangoMan so eloquently stated it....

06-02-2009, 03:54 PM	#241
seriousracer be a man dodge tree bark Joined: Jun 2007 Location: AKA rooster....somewhere but not here. Oddometer: 3,752	terminal velocity it is 3 minutes if it is only 120mph. if in fact it was in a glide it would be about 17 minutes. at 270 knots on 12:1. http://www.csgnetwork.com/glideratiocalc.html __________________ racing is not real till your fighting for the line into the next blind corner,real roads, real trees, real fast, real men rally. be a man dodge tree bark! We’ve said it before, but it bears repeating; the GS handles in ways a two-story building was never meant to. Taking collections for Faye Butler Training please spare some change. www.kmotorwerks.com Remember red and yellow make orange.so to think orange is better means you have to use two steps to get there. ________

06-02-2009, 05:03 PM	#251
wxwax A Candle for Komet Joined: Jul 2001 Location: Atlanta, GA Oddometer: 59,363	"From avherald.com "New information provided by sources within Air France suggests, that the ACARS messages of system failures started to arrive at 02:10Z indicating, that the autopilot had disengaged and the fly by wire system had changed to alternate law. Between 02:11Z and 02:13Z a flurry of messages regarding ADIRU and ISIS faults arrived, at 02:13Z PRIM 1 and SEC 1 faults were indicated, at 02:14Z the last message received was an advisory regarding cabin vertical speed. That sequence of messages could not be independently verified." http://www.airlinepilotforums.com/ma...issing-14.html __________________ Sid. It has been said that man is a rational animal. All my life I have been searching for evidence which could support this. -- Bertrand Russell To make an apple pie from scratch, you must first invent the universe. -- Carl Sagan

06-02-2009, 05:09 PM	#252
Mango Man Beastly Adventurer Joined: Dec 2004 Location: Treasure Coast Fla Oddometer: 5,349	Tough way to go. __________________ Stay hungry

06-02-2009, 05:46 PM	#253
bradatlarge I'm an Atoll. Joined: Mar 2006 Location: ORD T3 Oddometer: 3,851	An advisory regarding cabin vertical speed? I read that to mean, wholly shit this thing is going faster than it should in a vertical manner. __________________ I might be wrong. If you don't claim your humanity, you will become a statistic. You have been warned....

06-02-2009, 05:54 PM	#255
bradatlarge I'm an Atoll. Joined: Mar 2006 Location: ORD T3 Oddometer: 3,851	as MangoMan so eloquently stated it.... __________________ I might be wrong. If you don't claim your humanity, you will become a statistic. You have been warned....

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