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On Sat, 2 Mar 2013 12:16:30 -0800 (PST), Transition Zone
wrote: On Mar 1, 12:08*pm, Richard wrote: On 3/1/2013 11:02 AM, Transition Zone wrote: On Mar 1, 4:06 am, *wrote: On 03/02/2013 03:05, Spehro Pefhany wrote: On Sat, 02 Feb 2013 16:48:44 -0800, the renowned Gunner *wrote: Im trying to remember which prop job in the 1950s kept going down...British aircraft IRRC....which had the tails snapping off...some sort of metal fatigue/harmonics issue which took them awhile to find and correct. They did a movie about it in the 1960s IRRC Turbojet, but maybe this one? http://en.wikipedia.org/wiki/De_Havilland_Comet They didn't understand metal fatigue very well in those days- nice big square windows in the early models. Best regards, Spehro Pefhany It wasn't the fuselage windows for the passengers that caused the problem (at least for G-ALYP), it was the ADF window in the roof. The passenger windows did fail in the tank test though. The stresses at the corners turned out to be higher then de Havilland's engineers had suspected.http://www.oocities.org/capecanavera...cogalyp.htm#yy I see they later made the naval versions with fewer windows. *Renamed as an MR.2P, one was shown crashing into a lake near Toronto 10 or so years ago. --http://www.youtube.com/watch?v=5o6PitZEmMI This aircraft has been flying since 1967, and has given excellent service. But you post a fatal crash video you found on the first page of returns. Bah! Right, thanks for that. That aircraft is supposed to scour the water for enemy craft. That is its specialty. So crashing in a friendly lake full of civilians on a bright sunny day isn't exactly the first think you'd expect from that "service". It was an "air show" - the MOST dangerous aviation activity, short of all-out war. |
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Gunner wrote:
Im trying to remember which prop job in the 1950s kept going down...British aircraft IRRC....which had the tails snapping off...some sort of metal fatigue/harmonics issue which took them awhile to find and correct. They did a movie about it in the 1960s IRRC The movie was filmed in 1951. http://en.wikipedia.org/wiki/No_highway_in_the_sky |
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On Feb 2, 7:48*pm, Gunner wrote:
On Mon, 28 Jan 2013 20:57:11 -0000, "Keith W" wrote: Mr.B1ack wrote: On Mon, 28 Jan 2013 08:16:31 -0800, Delvin Benet wrote: On 1/28/2013 5:08 AM, Mr.B1ack wrote: On Sun, 27 Jan 2013 12:49:32 -0800, Transition Zone wrote: On Jan 27, 2:19 am, "Mr.B1ack" wrote: On Sat, 26 Jan 2013 12:30:42 -0800, Transition Zone wrote: On Jan 25, 9:54 pm, "Mr.B1ack" wrote: Strictly speaking, the 787 is not an engineering failure. Like anything complex and new it has a few issues. So far these issues haven't caused any fatalities. But, the then-new EU Airbus airliner (A320) did have mostly fatalities on an opening day mess-up, back on June 26, 1988, at Mulhouse-Habsheim Airport. *Airbus's A380 had terrible delays, too. * * Irrevelant. * * It did not acquire the REPUTATION for being dangerous. And the A320 didn't? That's all-important. * That's all that counts. The 787 is *done*. I *way* doubt that. * * Put it this way ... *I* won't fly on one. I don't fly much any more - it's a miserable experience since 9/11 no matter what the plane is - but I wouldn't have flown on the 787 until it had been in service for a year or so. This battery problem is worse than the average sort of aeronautical hiccup - more like a serious case of indigestion - but they'll overcome it. * They'll overcome *it - technically - but will that * help in terms of public *perception* ? If the public * thinks it's a deathtrap then why would airlines buy * any ? Switch to Airbus instead. * Remember Value-Jet ? Remember the flaming CRASH ? * The *name* 'Value-Jet' became inviable - and they * had to change it to "Jet-Blue". * I don't think Boeing can try that trick. erm Valujet did not change to JetBlue thats a quite different airline * Recall the planes, spend a year REALLY debugging * them ... then re-issue them as the '797' instead. * Tweak the cosmetics a bit too ... then it will * *seem* like a new plane and public paranoia will * be avoided. Yea, it'll be 99.5 percent the 787, * but *perception* is what's gonna count. Says the man who perceived Jetblue as the reincarnation of Valujet. The reality is that MANY new aircraft have suffered minor engineering issues that caused them to be grounded for a while including the new Airbus 380 Keith http://articles.businessinsider.com/...eet/30054350_1... Im trying to remember which prop job in the 1950s kept going down...British aircraft IRRC....which had the tails snapping off...some sort of metal fatigue/harmonics issue which took them awhile to find and correct. They did a movie about it in the 1960s IRRC Gunner The methodology of the left has always been: 1. Lie 2. Repeat the lie as many times as possible 3. Have as many people repeat the lie as often as possible 4. Eventually, the uninformed believe the lie 5. The lie will then be made into some form oflaw 6. Then everyone must conform to the lie And you've repeated the above lies how any times now?? |
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| Federal regulators said on Wednesday that they had approved | one flight of a Boeing 787, with a flight crew but no | passengers, as the company's engineers study possible | changes to the plane's electrical systems that could reduce | the risk of another battery fire. | ... http://www.nytimes.com/2013/02/07/business/faa-to-allow-a-787-flight-with-crew-only.html --bks |
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NTSB hearing now in Q&A session. From Hersman's briefing:
o Not caused by mechanical impact on the battery o Not caused by external short circuit o Event started in one cell (cell #6) and spread to other cells. Now looking at the Boeing certification and testing in depth, with particular attention to the special conditions imposed by FAA in 2007 on use of Lithium-Ion batteries: o Boeing estimated chance of smoke emission at 1 event in 10,000,000 flight hours, however there were two events in less than 100,000 hours. o Boeing said that design of battery would prevent cell-to-cell propagation but NTSB claims that is exactly what would happend. Interim factual report will be issued within 30 days. FAA makes the calls on flying, not NTSB. --bks |
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On Thu, 07 Feb 2013 16:33:34 +0000, Bradley K. Sherman wrote:
NTSB hearing now in Q&A session. From Hersman's briefing: o Not caused by mechanical impact on the battery o Not caused by external short circuit o Event started in one cell (cell #6) and spread to other cells. Lithium-ion batteries are nefarious for suddenly bursting into flame. Dell and Sony lost a ****load of money because of flaming laptops. Nickel-metal-hydride batteries still exist and are the logical, safer, replacement technology. Don't hold quite as much energy per unit weight though and don't have quite as long a service life either. Still, if it means yer plane doesn't go down in flames with 600 passengers .... Now looking at the Boeing certification and testing in depth, with particular attention to the special conditions imposed by FAA in 2007 on use of Lithium-Ion batteries: o Boeing estimated chance of smoke emission at 1 event in 10,000,000 flight hours, however there were two events in less than 100,000 hours. o Boeing said that design of battery would prevent cell-to-cell propagation but NTSB claims that is exactly what would happend. Interim factual report will be issued within 30 days. FAA makes the calls on flying, not NTSB. Boeing was way behind on their orders ... so they slapped a lot of lipstick on the 787 and declared it safe and ready for service. Supposed federal oversight was, as usual, nearly non-existent. |
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On Wed, 6 Feb 2013 15:15:47 -0800 (PST), Liberal Here
wrote: Im trying to remember which prop job in the 1950s kept going down...British aircraft IRRC....which had the tails snapping off...some sort of metal fatigue/harmonics issue which took them awhile to find and correct. They did a movie about it in the 1960s IRRC Gunner The methodology of the left has always been: 1. Lie 2. Repeat the lie as many times as possible 3. Have as many people repeat the lie as often as possible 4. Eventually, the uninformed believe the lie 5. The lie will then be made into some form oflaw 6. Then everyone must conform to the lie And you've repeated the above lies how any times now?? Which lies might those be? The movie about british aircraft snapping off tails was indeed ID'ed The sig is 100% accurate and remains a polished and accurate way to **** you Leftwingers off as its accuracy is well established and you simply cannot stand to have it flaunted in your faces. VBG Now back to the bit bucket..troll plink Gunner The methodology of the left has always been: 1. Lie 2. Repeat the lie as many times as possible 3. Have as many people repeat the lie as often as possible 4. Eventually, the uninformed believe the lie 5. The lie will then be made into some form oflaw 6. Then everyone must conform to the lie |
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