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Tema: Cae un F-22 de Tyndall.
- 15/11/2012, 23:05 #1guestGuest
Cae un F-22 de Tyndall.
Pues eso, que me acabo de enterar por twitter:
BREAKING NEWS: (AP) Air Force officials say an F-22 has crashed along a highway in the Florida Panhandle and that the pilot ejected safely.
TYNDALL AIR FORCE BASE, Fla. -- Air Force officials say a jet has crashed in the Florida Panhandle.
A release from the Air Force says the F-22 Raptor went down Thursday afternoon on Highway 98 near Tyndall Air Force Base, just south of Panama City. The pilot ejected safely before the crash and was receiving medical treatment at the base.
A section of the highway was closed as a safety precaution as rescuers responded to the scene.
There were no immediate reports of injuries on the ground.
The cause of the crash wasn't clear.
Read more here: TYNDALL AIR FORCE BASE, Fla.: Jet crashes near Panhandle Air Force base - Florida Wires - MiamiHerald.com
- 15/11/2012, 23:13 #2
Me alegro de que el piloto este bien.
Ya veremos que ha ocurrido pero de este avión cualquier cosa
- 15/11/2012, 23:15 #3
Al menos el asiento funcionó bien, ya vamos mejorando.Somos guardacostas... Nadie nos aprecia hasta que nos necesita " The guardian "
¡Dadme un VOR, un Radial, un DME y una Carta y volaré zero-zero hasta el mismísimo infierno!
- 15/11/2012, 23:21 #4
- 16/11/2012, 12:03 #5
- 31 may, 07
Pfff oro F22 out, si encima eran escasos y caros otro menos , algo debe pasar con los F22, esperemos que aclaren las causas del accidente.
Me alegro por el piloto que este con vida, lo que no se entiende que en aparatos tan modernos lleven ya mas de 1 y 2 accidentes."SPANAIR 1986-2012 , Una de las mejores aerolineas europeas de la historia "
"PLATAFORMA SALVEMOS CUATRO VIENTOS"
- 16/11/2012, 12:14 #6
- 20 ago, 08
- 16/11/2012, 13:49 #7
- 16/11/2012, 14:02 #8
Gracias a dios!!!
- 16/11/2012, 14:06 #9
In 2005 a USAF expert panel called the Raptor Aeromedical Working Group recommended changes to deal with breathing problems on the F-22. These changes were not implemented at the time, but are under consideration in 2012. The changes included the installation of a backup oxygen system that will now be installed. Different reasons have been offered for the omission, including weight and cost. Problems were designed into Raptor by the 1990s USAF, that had shed "much of its scientific, medical and engineering expertise" from the Cold War. These problems only surfaced once F-22 flights became common after 2008.
On 11 February 2007, twelve Raptors flying from Hawaii to Japan were forced to turn back due to a software glitch in the F-22s' on-board navigational computers. The fleet was briefly grounded in February 2010 due to corroded ejection seat rods.
In May 2011, the Raptor fleet was grounded following the November 2010 crash near Elmendorf Air Force Base, Alaska. The F-22 had been restricted to flying below 25,000 ft while the Honeywell oxygen generating system was inspected. After five incidents of pilots suffering from hypoxia and decompression, General William M. Fraser III of Air Combat Command grounded the F-22 fleet indefinitely on 3 May 2011. In June 2011, the investigation broadened across the life support systems, and aircraft deliveries were stopped. During the investigation it was found that F-22 pilots suffered from a "Raptor Cough" and other breathing problems nine times more often than the pilots of other fighters.
Some of the polymers used on the F-22 are a significant health risk to personnel; technicians are required to wear protective equipment such as eye protection, respirators and gloves to work on the aircraft. These same materials have been suggested to be behind the "Raptor Cough" and other health problems suffered by F-22 pilots and ground crews. USAF Maj. Gen. Charles Lyon suggested that the ground crew problems could be from dehydration or hypoglycemia, and that pilots are to be told to improve eating and to stay well hydrated.
In September 2011, the F-22 returned to flight with added pilot safety equipment and careful monitoring of crew and aircraft, while the investigation continued. On 21 October 2011, Langley's F-22s were grounded after a suspected oxygen system problem; Joint Base Elmendorf-Richardson grounded their aircraft as well. All aircraft were cleared to fly again on 25 October.
In late October 2011, Lockheed Martin was awarded a $24M contract to find the cause of the breathing difficulty, as well as providing other sustainment functions. During the investigation various causes were investigated including poisoning by carbon monoxide from the engines while warming up the aircraft inside the hangars, other chemicals have been inhaled from the on-board oxygen generating system (OBOGS), including oil fumes and propane, other toxins that could enter the aircraft environmental control systems such as neurotoxic diisocyanates from the polyurethane adhesive used to glue stealth materials to the aircraft, high concentrations of oxygen caused by high-G high altitude maneuvers that other American jet fighters can not duplicate, leading to the collapse of the pilot's pulmonary alveolus, and that the breathing system on board the Raptor might not provide sufficient oxygen in some situations.
In mid-December 2011, the Air Force said that there had been 14 episodes since September, when the F-22s returned to operation, in which pilots experienced "physiological incidents" that might have been caused by a lack of oxygen. Up to April 2012 seven serious accidents occurred with two pilots killed. Since the redeployment in September 2011, 11 incidents of pilots reporting hypoxia-like symptoms have been recorded.
Air Force pilots have reported being pressured to continue flying the aircraft in spite of fearing for their safety because of the still-unresolved problems with the oxygen system. And half of all F-22 pilots have "lost confidence in the aircraft". General Mike Hostage stated that some of the 200 Raptor pilots have asked to transfer to other areas because of the problem. Hostage said that he will start flying the aircraft himself to better understand the relevant issues. Hostage qualified on the Raptor in June 2012.
In May 2012, it was announced that two pilots, Major Jeremy Gordon and Captain Josh Wilson, who had appeared on the CBS news program 60 Minutes, saying they didn’t feel safe in the jet, were considered whistleblowers protected by the federal whistleblower legislation. Defense Secretary Leon Panetta subsequently ordered that all F-22 flights stay "within the proximity of potential landing locations" as more pilots came forward to report hypoxia-like symptoms.
Another cause may be the pressure-garment worn by the pilots, which may interfere with breathing; the fix may be to use the more evolved design built for the F-35. In the meantime the pilots have been instructed to not wear the pressure vests during routine flights. The same vests have shown an almost "unanimous failure rate in testing". The two most recent breathing incidents were determined to be the results of mechanical problems unrelated to the general problem.
In July 2012 the Pentagon concluded that a pressure valve on vests worn during high-altitude flights and a carbon air filter were the likely sources of at least some hypoxia-like symptoms, and that long distance flights can resume without the vests and therefore at lower altitudes. The carbon filters were also changed to a different model to reduce shedding of inert, but alarming, black dust into the pilot's lungs. The first overseas flight under the new rules was a routine rotation at Kadena Air Base, Okinawa.
On 1 August 2012 it was announced that the connector hoses and valves of the "Combat Edge" upper pressure garment were at fault in many recent hypoxia-like instances, specifically the breathing regulator/anti-G (BRAG) valve that is used to inflate the vest. Later that month the flight duration restrictions were lifted, but without an effective pressure vest the Raptors remained restricted to the same altitudes as other fighters. On 19 September 2012, USAF General Gilmary M. Hostage III stated that the main source of the problems was not the hardware, but the "human physiology" of the pilots. He added that F-22 pilots would undergo training to teach them how to react appropriately to oxygen issues while operating the jet. One of the changes would be to revert to automatic rather than the maximum setting for oxygen as the USAF prepared to open up the Raptors and update the firmware on the OBOGS along with the installation of the backup system. A further investigation found that the OBOGS unexpectedly reduced oxygen levels when the aircraft performed high-G maneuvers.
The same valve had earlier been tried on the F-15 and F-16 aircraft, but found defective and unnecessary. When the higher attitudes of the F-22 then required pressurization of the pilot's vest, the same faulty valve was reintroduced without fixes.
In late 2012, Lockheed was awarded contracts to install an automatic oxygen backup system in addition to the primary system and manual backup.
Sl2.Aprende de los errores de los demás. Nunca vivirás lo suficiente para cometerlos todos tú mismo.