The expert calls an U.S. Army F

Nimble of Wang Peng Cui

On May 3, the last F-22 battleplan that fourth company of horse of Losk Heed · produces for air force finishs consign. So far, 187 F-22 that air force orders reach the designated position entirely, finished the deploy in 7 air base.

F-22 " bird of prey " the opportunity for combat of the Five Dynasties that battleplan regards the world as to go up to enlist in army exclusively truly, deployed photograph of vector thrust engine, active to accuse the advanced equipment such as a radar, with its outstanding " 4S " -- supersonic speed cruise, super- maneuverability, exceed apparent distance attack and concealed body performance, be regarded as the brunt opportunity for combat that 21 centuries capture and maintains war zone control of the air by the U.S. Army. In May 2010 American strategy and budget evaluate a center to release " battle of empty sea an organic whole " in studying a report, f-22 also is regarded as an U.S. Army " one's trump card " , in concealed body dash forward prevent there is important role in fighting. Can say, f-22 is the eye preexistence bound is the most advanced aircraft in active service bat 12 volt adaptor price tleplan, also be one of actual combat weapon that deterrence power provides most in U.S. Army equipment.

But, f-22 after air force of make one's bow enlisted in army in May 2005, often " drop chain " , a many problems are revealed in use process. Afp reported 12 volt adaptor plug recently, air man of two F-22 battleplan is in air force of TV station of Colombian Broadcasting Corporation " 60 minutes " express in the program, because the existence of the system that feed oxygen of F-22 endangers the serious problem of pilot life safety, they reject to continue to drive this model opportunity for combat.

brass faucetActually, f-22 is airborne long-standing of issue of the system that feed oxygen. According to the data that air force publishs, the best selling 12 volt adaptor f-22 has happened 7 cases after enlist in army " one class accident " , crash 4, become air force the model with top rate of accident of the flight in active service opportunity for combat. In the discovery in subsequently accident investigation, among them two crash die human affairs cause is immediate the cause is probable it is breakdown of the system that feed oxygen.

The system that feed oxygen ensures systematic subsystem as pilot life, be in charge of supplying the oxygen of proper content and pressure in clerk of hollow Xiang Fei, and what supply in headroom is pure oxygen. Accident reason may be to offerred oxygen system to appear to aerobic inadequacy, intermittence feeds oxygen or offer the issue with not stable oxygen when headroom works. And right now once air man is anoxic, blur with respect to meeting occurrence consciousness, stopping to offer oxygen is met inside 10 seconds insensible, bring about crash.

I most popular selling 15 pin vga nside 4 years of in the past, f-22 reported air man is anoxic ten cases in all circumstance. For this, air force costs 7 million dollar to send the installation in wind system sensor of civil oxygen state in F-22 monitor the situation that feed oxygen, increase the safe handle that installed the lash-up that start to supply oxygen system. Even group of aircraft of F-22 of grounding of aircraft of two big range, it is the longest come from May 5, 2011 on September 19, last a period of time is as long as 4 half moon.

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Appear again to prevent anoxic crashing accident, beautiful air man still gave orders in January 2011, f-22 trains flight height to must not exceed 7600 meters. But, up to now this one problem has not gotten be settlemented thoroughly. This pair drives the air man of F-22 people will tell, cr the most popular 15 pin vga eated enormous psychological pressure undoubtedly. According to the United States " the Stars and the Stripes signs up for " report, in the past already air man of a few F-22 has put forward to turn for this hillock application, make superior very embarrassed.

On communication system, f-22 also is put in the problem. To concealed body result assures on radio signal feature, what F-22 installs at first is the Link-16 terminal that light receives to be not sent, can be 15 pin vga the same as with F-22 only model machine undertake two-way data corresponds, with other type cannot communication and liaison. Result, although F-22 oneself has powerful message to get ability, cannot fight with the U.S. Army's active service other type however plane implementation information is shared, undertake cooperating with fighting. The F-22 that this makes stand-alone performance very strong became the loneliness on battlefield " bird of prey " , this been realizinging network to fight today, more or less be a little malapropos.

Why be sent by American army with great expectations " bird of prey " can appear such problem. Investigate its reason, the mainest likelihood still was at 2 o'clock:

It is the deviation that the function locates. The development of F-22 plans only then at going up century at the beginning of 80 time, designing what the target basically is aimed at is at that time Russia amount is numerous revive - 27, MiG - 29 wait for high-powered battleplan, and the system of the tightest forms by a large number of advanced and ground-to-air missile Russia mainland air defence on so-called world. Of F-22 basically fight the task is " face an one foot " the advantage in net of spurn Russia air defence, capturing sky, carry out with covering B-2 bomber dash forward prevent. Accordingly, what F-22 locates in the beginning of design is high minatory rate fight environment. However, 1991, the disintegrate of Russia makes F-22 lost a target at a draught. "9 · 11 " after horrible assault happens, american assemblyman has raised doubt to the future of F-22, think child of this one cold war cannot suit to fear warlike need instead. But position of the overlord in the sky that air force and fourth company of horse of Losk Heed · still hold to F-22 to be able to maintain for the U.S. Army 40 years. Should say, cold war of development process over or across and hind the F-22 of mechanization war and cold war times, informatization war times, still need to adjust to the fixed position of oneself function.

2 it is to be in high-powered with unbalance appears between high reliability. At the beginning of F-22 is being designed, raised target of extremely tall ability tactics function. "Tall, big, complete " design conce satin pjs for man pt is perforative the whole development process of F-22. Fourth company of horse of Losk Heed · says perfect opportunity for combat to make this one can, it is excelsior that in engine function, airframe structure, material is applied and all many sided such as concealed body coating can say. Result, the stand-alone of F-22 produces cost to add cost of research and development to be as high as 350 million dollar actually.

But, what seek demand perfection position with high investment is high-powered, the impact is the biggest is systematic dependability. The inherent rule that weaponry develops makes clear, exorbitant function index is put in huge technology risk necessarily, the issue of the airborne system that feed oxygen of F-22 is most of concentration reflect. In addition, f-22 still has appeared canopy breaks coating of body of lock, concealed to fall off wait for a problem. Accordingly, f-22 should have been handled high-powered with the relation between high reliability, spend very great time to undertake improvement even. (Unit of writer of nimble of Wang Peng Cui: University of air force project)

watch cases

　　Relevant report:

The U.S. Army gives orders to restrict F-22 far be apart from a flight in order to ensure air man is safe

Chief of a tribe of couplet of A of deploy of opportunity for combat of U.S. Army F-22 answers activity of Iranian nucleus research and development

Blemish of communication of existence of U.S. Army F-22 fights in coordination with other opportunity for comb the most popular satin pjs at hard

Opportunity for combat of U.S. Army F-22 attends Latin America the most large-scale boat is exhibited