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Author Topic: F-117A Nighthawk  (Read 9988 times)
 
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markobe
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« Reply #15 on: March 22, 2017, 08:50:54 pm »

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...i izigravaju taksi na udaljenoj pisti...

E svaka čast "novinaru" na ovoj "konstrukciji". Ako nešto "taksira" po pisti ne mora značiti da se radi o taxi-ju.  Grin Grin
Ili je ovdje ulogu novinara "odradio" nekakav program za prijevode...

Usput, ovo nije prvi put da se pojavljuje ovakva vijest. Pred nekoliko godina se isto pojavio spotterski video sa jednim F-117 u letu iznad pustinje. Očito su neki od tih aviona još uvijek aktivni...
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kumbor
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« Reply #16 on: March 22, 2017, 09:19:58 pm »



engleska reč to taxi, taxiing along the taxiway širokoprihvaćena u službenom vazduhoplovnom diskursu označava rulanje po delu PSS koja se zove rulna staza, engl. taxiway.  Novinari misle da je to prosto neki letački sleng, neko "taksiranje", što je ordinarna glupost. Delovi PSS na aerodromu su obično runway (PSS u pravom smislu), taxiway - rulna staza i apron.
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MOTORISTA
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« Reply #17 on: March 04, 2019, 06:24:07 am »

F-117 „vaskrsao“ u tajnim operacijama u Siriji
Novosti online   03. mart 2019.

Američki nevidljivi avioni F-117 učestvovali su u tajnim vazdušnim udarima po Siriji 2017. godine, objavio je na Fejsbuku holandski magazin za avijaciju „Skrembl“.

Prema informacijama autora teksta, najmanje četiri letelice F-117 poslate su na Bliski istok, pošto su američkoj avijaciji bile hitno potrebne. Jedan „jastreb“ je učestvovao u specijalnoj operaciji i udaljio se daleko od svoje privremene baze, koja se verovatno nalazila u Saudijskoj Arabiji, Ujedinjenim Arapskim Emiratima ili Kataru. Kako se navodi, avioni su leteli iznad Sirije i Iraka noseći male bombe. U decembru 2017. godine saopšteno je da su „jastrebovi“ uočeni na nebu iznad vojne baze „Zona 51“ u američkoj državi Nevada. Podsetimo, „Lokid“ F-117 „Noćni jastreb“ je prvi put poleteo 1981. godine. Sredinom 2008. godine je povučen iz upotrebe, pre svega zbog pojave novijeg modela F-22.

Učestvovao je u borbenim operacijama u Panami, Iraku i na prostoru bivše Jugoslavije. U toku operativne upotrebe, avioni F-117 su imali šest udesa i jedno obaranje u borbi. Vojska Jugoslavije je prva i jedina u svetu koja je zvanično uspela da sruši avion ovog tipa, u toku NATO bombardovanja Savezne Republike Jugoslavije, 27. marta 1999. godine. Uspela je da ga obori i da sruši mit o njegovoj „nevidljivosti“, dejstvom 3. bataljona 250. raketne brigade jugoslovenske PVO, ruskim raketnim sistemom S-125 „neva M“.

Izvor: www.novosti.rs
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Dreadnought
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« Reply #18 on: March 24, 2020, 04:42:16 pm »



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« Reply #19 on: June 11, 2020, 09:46:40 am »



Početkom 70-tih godina su amerikanci počeli sa programom Have Blue, no, Lockheed Martin najprije nije namjeravao sudjelovati, kad su pobljedili  na natječaju za radarsko apsorpcijske materijale (RAM), dobili su  ugovor u vrijednosti 30 milijona $



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In the 1970s, classified under the codename Have Blue, U.S. aerospace manufacturer Lockheed Martin built a first-of-its-kind proof of concept demonstrator aircraft in the rather unique shape of a diamond. It would be the very first fixed-wing craft designed with the express purpose of avoiding detection by radar. Actual flight dynamics were of secondary concern. In fact, before the Have Blue project had its first test flight, engineers were doubtful the demonstrator could even fly, nicknaming the prototype “the Hopeless diamond” - a play-on-words referencing the famed Hope Diamond. Even though the project would go on to be developed into the first-ever stealth fighter, the F-117A Nighthawk, the engineers wouldn’t be entirely wrong… Two Have Blues were built, but neither survived...





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Dreadnought
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« Reply #20 on: September 21, 2020, 04:26:53 pm »




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« Reply #21 on: October 22, 2020, 09:47:04 am »

Dva F-117 sletela u mornaričku bazu Miramar kod San Dijega u Kaliforniji.

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Two F-117 Nighthawk Stealth Jets Have Landed At MCAS Miramar
October 21, 2020 David Cenciotti Military Aviation

The F-117 saga continues. Two Nighthawks have landed at the Marine Corps Air Station Miramar outside San Diego.

On Oct. 20, 2020, two F-117s have made a surprise visit to MCAS Miramar. Using their usual radio callsign “KNIGHT”, the two stealth jets have landed at the air base located north of San Diego at around 17.30LT. While the reason for the visit is unknown, what’s certain is that the aircraft did not perform an emergency diversion: the audio obtained by The War Zone clearly proves the F-117s were not emergency traffic (otherwise they would have stated their status on their first radio call to Miramar Tower) nor did they perform any precautionary pattern. They simply followed the standard VFR recovery, reporting the Initial Point for the visual pattern. Our reader Colin Odneal sent us a few shots he managed to take with his smartphone from his car, as he drove past Miramar on the 15 South.

If the F-117s deployed to MCAS Miramar to take part in some kind of exercise in SOCAL, then we will probably find out in the next few days. Indeed, as explained in various articles, while some of the F-117s retired in 2008 and kept in a “Type 1000” storage at Tonopah Test Range have been disassembled before being transferred to museums around the U.S., sightings of F-117s flying over Nevada and California have continued. We have reported them in 2018, in 2019 and also 2020.

The appearance of the “Wobblin’ Goblin” also fuelled some rumors according to those the aircraft was  re-introduced to combat in Syria and Iraq in 2017, although these claims have never been substantiated. On the other side, it seems to be confirmed that the enigmatic Black Jets have been involved in aggressor tasks during the latest Red Flag iterations. Interestingly, this is the second time the F-117 makes the news in California lately. In fact, on Oct. 3, 2020, the Palm Springs Air Museum (PSAM), in Palm Springs, California, welcomed the F-117A #833 with a military retirement ceremony.

Upon arrival at PSAM the aircraft, nicknamed “Black Devil”, towed by a ground vehicle, was greeted by a flyby salute from two pivotal Lockheed aircraft (the WWII vintage P-38 Lightning and a first-generation T-33 Shooting Star jet) along with a water arch tribute and a final radio call from the control tower that recognized its 20-year service in the U.S. Air Force.


Izvor: CLICK
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Dreadnought
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« Reply #22 on: November 11, 2020, 01:50:32 pm »



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The United States Air Force “officially” retired the Lockheed F-117 Nighthawk in April 2008, but what retired actually means is debatable as two of the Cold War stealth aircraft were seen last week in the skies near Miramar Naval Base, outside of San Diego. The Nighthawk, which was the first operational warplane to be designed around stealth technology, was designed to be virtually invisible to radar, and difficult to spot with the naked eye.

While five were placed in museums, most of the F-117s were actually placed in Type 1000 storage, which means the aircraft are maintained in a condition where they can be recalled to duty and fly again. This “inviolate” storage also means that no parts are pulled from the aircraft without the express permission of the type’s system program office at Wright-Patterson Air Force Base, Ohio, which technically “owns” the aircraft.

There have been unsubstantiated reports that four F-117s were secretly deployed to the Middle East in 2016, while there have been multiple confirmed flights of the aircraft in California prior to this week’s air sortie.

A photo from an aviation enthusiast circulated on the social media platform Instagram in March that showed an F-117 flying in the “Star Wars Canyon” (aka Rainbow Canyon) in California, where Air Force pilots train.

There are several other reasons why the F-117 is occasionally seen flying high. For one it could be that the planes are taken out of Type 1000 storage to determine an aircraft’s airworthiness but also to prove the efficacy of the storage procedures.

Additionally, some F-117s could be used to test stealth-detection abilities of the AWACS (Airborne Warning and Control Systems), and that could be cheaper than using the far more modern but also far more expensive F-22s or F-35s as test aircraft.

Perhaps the Nighthawk just can’t be kept on the ground!





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pvanja
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« Reply #23 on: September 15, 2021, 11:22:24 am »

Amerikanci su reaktivirali F-117 (ako su ga ikad skroz i povukli iz upotrebe).
O ovom se prica vec nekeo vreme ali sad milsim prvi put se pojavio i snimak.
Navnodno se kroisti za trenazu u borbi protiv stelth ciljeva.

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Kubovac
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« Reply #24 on: September 15, 2021, 11:43:47 am »

@pvanja

Znaš kako....oko tog F-117A...sve je to veđ "viđeno"!  Wink Grin
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milan55
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« Reply #25 on: September 15, 2021, 12:26:48 pm »

Da izgleda da su aktivirali neke F-117 da bi vrsili testove stealt tehnike.
Po netu se vrte razni prilozi za i protiv. uglavnom sve se bazira na smanjenju odraza na bazi materijala i geometriskog oblika letjelice. Novi borbeni zrakoplovi zadnje generacije svi imaju smanjeni odraz RCS ili kako se vec zove, uz smanjenje infracrvenog zracenja. Kao sto znamo nevidljivi nisu nego su samo slabo uocljivi. Evo i jedan prilog kakao jedna njemacka tvrtka tvrdi da sa svojim radarom vidi stealt zrakoplove u ovom slucaju F-35. Upitno je da li su ti zrakoplovi uopce bili u Stealt modusu jer kada lete izvan borbenih operacija, u civilnom zracnom prostoru i kod tankanja u zraku ,da budu uocljivi da se izbjegnu sudari i nesrece.
Slican problem su i "Stealt" brodovi pa se svi "ubise" od muke da naprave sto cudniji brod sa malim radarskim odrazom, ali sto god radili jednu stvar ne mogu sakriti a to su valovi/brazda,  koju brod oatavlja iza sebe tako da neprijatelj i ako ne vidi dobro brod, vidi da se "tamo nesto po moru valja" .
Zanimljivo je kao se stvari ponavljaju.Sada se spominje da da su ovi stealt zrakoplovi kao npr. F-117 vidljivi sa starim ruskim radarima nize frekfencije uglavnom odavno izbacenim iz upotrebe. Nesto slicno se dogodilo , 50 godina proslog stoljeca, kada su amerikanci groznicavo pokusavali da uhvate zvuk novih ruskih podmornica. I posto tehnika i tehnologija ide naprijed pa se zbog principa da sto je veca frekvencija to su potrebne manje antene i bolja kvaliteta signala , tako se dogodilo da je jedan americki naucnik otisao da tako kazem u "antikvarijat" opreme i uzeo stari sonar vrlo niske frkvencije ,sa kojim su se ruske podmornice izvrsno cule. To je pocetak razvoja SOSUS mreze prislusnih kablova na morskom dnu i stanica.





O zastiti sa ioniziranom plazmom se malo pise nego se uvijek navode ostali stealth aspekti.Zbog pojave stealt tehnika na bazi ionizirane plazme zrakoplovi kao F-117 nisu vise aktualni i zato su povuceni. U casopisu Air international od Januara 2000 se u clanku "Military Power" navodi pri kraju clanka nesto na tu temu ali se kasnije to vise ne navodi.
Vidi post o B-2:


https://www.paluba.info/smf/index.php?topic=35052.0


B-2 svoja svojstva "nevidljivosti" zahvaljuje osim specijalne boje, premaza , koja je usput jako osjetljiva na vlagu tako da se ne koriste kada je prognoza kisa u zonama djelovanja, zakrivljenom obliku trupa i krila+ nedostata kormila pravca kao velike povrsine za vracanje odbijenih radarskih valova i povecanja radarskog odraza RCS, hladnim ispusnim mlaznicima tako da je slab odraz za rakete i senzore infracrvenog i toplinskog spektra svi polopci su tzv. Anti-Radar Panels, ali najveca tajna koja se pazljivo skriva je da avion ima tzv. plasma generatore koji stvaraju neku vrstu plazminog omotaca oko aviona tako da se radarski valovi ne odbijaju i vracaju od aviona nego se "upijaju" i tako avion postaje nevidljiv za protivnicke radare.Tada je avion u nekoj vrsti Ionizirajuceg oblala , plazme . Postoje slike B-2 u takvom oblaku npr. fotografije napravljene u letu od Bobbi Garcija snimljene iz F-16. Kada se ukljuce ti generatori plazme se na napadnoj ivici krila koja ima na svakom krilu 8 panela ,svi paneli osim drugog panela gledano od nosa zrakoplova, koji ostaje ne elektrziran sa visokim naponom i to napadna ivica je "+" ionima, a mlaznici izlaza plinova i turbomlaznih motora 2+2 su negativni "-" ioni velikog napona. Drugi panel gledano od nosa na krilu je ostavljen elektricki neutralan jer sluzi kao radarska antena, bolje reci ploca sa puno malih antena radara, koji se i onako rijetko ukljucuju da se ne oda prisutnost aviona. Radar nema klasicne rotirajuce antene nego tzv. Phased Array Radari. "For reasons not yet de-classified, the B-2 charges its leading edge to a very high electrical potential difference from its exhaust stream. It has been suggested (by Jane's Defence) that it augments the B-2's low thrust main engines. It is also a well known phenomenon that an ionised gas (plasma) will scatter a radar beam far more effectively than a solid surface of any conceivable shape. This could be the purpose of the high voltage leading edge." "Plasma stealth is a proposed process that uses ionized gas to reduce the radar cross section (RCS) of an aircraft. Interactions between electromagnetic radiation and ionized gas have been extensively studied for a variety of purposes, including the possible concealment of aircraft from radar that plasma stealth theorizes. While it is theoretically possible to reduce an aircraft's RCS by wrapping the airframe in plasma, it may be very difficult to do so in practice. Various methods might plausibly be able to produce a layer or cloud of plasma around an airframe, from "simple" electrostatic or RF discharges to more exotic possibilities like laser produced plasmas."

Zato i ne dozvoljavaju slikanje B-2 od ostraga.

[ Attachment: You are not allowed to view attachments ] [ Attachment: You are not allowed to view attachments ]


* b2plasma.jpg (117.95 KB, 600x399 - viewed 2 times.)

* b2plasma2.jpg (48.29 KB, 450x463 - viewed 1 times.)
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Kubovac
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« Reply #26 on: May 10, 2022, 10:13:57 pm »

Uživajte u ovom epskom snimku F-117 Nighthawk koji učestvuje u vežbi u Džordžiji

Sentry Savannah je najveća protivvazduhoplovna vežba velikih snaga četvrte i pete generacije Nacionalne garde vazduhoplovstva, koja se održava svake godine u Vazduhoplovnom Centru za dominaciju u vazduhu u vazduhoplovnoj bazi Nacionalne garde Savana, Džordžija. Jedan od četiri centra za obuku borbene spremnosti u Sjedinjenim Državama, Centar za dominaciju u vazduhu (ADC) sprovodi misije borbene obuke vazduh-vazduh za 4. i 5. generaciju rezervista i aktivnih borbenih pilota.

Od 2. do 15. maja, Sentry Savannah omogućava borbenim jedinicama iz cele zemlje da dođu u Savanu da zajedno treniraju integrisane taktike kao što su kopnena obuka, ofanzivne/odbrambene protivvazduhoplovne misije, odbrana od krstarećih projektila i obuka bacanja bombi na poligonu.

F-117 Nighthawk sa poligona Tonopah, u stvari, jedan F-117A (za koji se veruje da je deo jedinice poznate kao „Tamni vitezovi“) raspoređen je u Džordžiji (prema našim saznanjima, ovo je prvi put da se "stelt" mlaznjak razmešta na istočnoj obali SAD-a) i trenutno učestvuje u vežbama Sentry Savannah.

Avion sa oznakom 84-0828, zajedno sa repnim kodom 'TR' ima logo 40 godina rada na oba repa: to je prvi put da vidimo amblem koji slavi 40. godišnjicu od prvog leta koji se dogodio 18. juna, 1981. godine.

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