PALUBA
June 04, 2024, 09:14:31 pm *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Ovde možete pogledati te poručiti knjigu "Ešalon" jedan od autora je srpski podoficir i naš global moderator Kubovac
"Istorija razvoja sovjetskih i ruskih radara, komandno-informacionih sistema i sistema automatizacije"
 
   Home   Help Login Register  
Del.icio.us Digg FURL FaceBook Stumble Upon Reddit SlashDot

Pages:  1 2 3 4 5 6 7 8 9 10 11 [12] 13 14 15 16 17 18 19 20 21 22 23 24 ... 55   Go Down
  Print  
Author Topic: F-35 Lightning II  (Read 314252 times)
 
0 Members and 1 Guest are viewing this topic.
MOTORISTA
Počasni global moderator
kapetan bojnog broda
*
Offline Offline

Gender: Male
Posts: 62 007



« Reply #165 on: July 14, 2014, 09:40:17 pm »

Također, obratite pažnju na zadnju rečenicu čovjeka koji je daleko pametniji od svih nas ovdje na forumu koji je reko ono što sam reko i ja

Evo jednog još pametnijeg, a usto je i vazduholovni konstruktor.

Malo duža verzija intervjua sa Pjerom Sprejem u vezi sa F-35.



I drugi intervju u kojem objašnjava isto


Logged
kumbor
Stručni saradnik - opšti
kapetan bojnog broda
*
Offline Offline

Gender: Male
Posts: 17 583


« Reply #166 on: July 14, 2014, 10:11:45 pm »


Pa meni se dobro učinjelo da sam ga već gledao na Palubi.
Logged
Adler
potporučnik
*
Offline Offline

Posts: 2 160


« Reply #167 on: July 15, 2014, 11:16:45 am »

janes.com

Pentagon suspends F-35 contract negotiations until latest failure resolved


Marina Malenic, Washington, DC - IHS Jane's Defence Weekly

Key Points
F-35 purchasing negotiations will resume once implications of a 23 June fire aboard an F-35A are fully known
The Pentagon refused to make a deal for another lot of aircraft with the issue outstanding
The Pentagon's Joint Program Office (JPO) that oversees acquisition of the Lockheed Martin F-35 Lightning II Joint Strike Fighter has "temporarily suspended" negotiations for the next lot of aircraft and engines, a spokeswoman for the JPO told IHS Jane's on 8 July.

"Negotiations will resume once the scope of the engine issue and downstream effects are known," said Kyra Hawn. "The JPO would not close the deal with this issue outstanding and any subsequent fixes unresolved."

Lockheed Martin submitted its initial Low-Rate Initial Production (LRIP) Lot 8 proposal in December 2013. In April US Air Force Lieutenant General Christopher Bogdan, the Pentagon's F-35 acquisition chief, said he hoped to sign a contract by the end of May.

Pratt and Whitney spokesman Matthew Bates said the engine manufacturer "[looks] forward to concluding our negotiations shortly", and Lockheed Martin spokeswoman Laura Siebert said the company is "committed to closing LRIP 8 by the end of this summer".

According to Hawn, "all available fleet engines have been inspected" as of 8 July. "Some in depot maintenance will be inspected when access permits," she added.

The Pentagon grounded the entire F-35 fleet on 3 July, just days before the US Marine Corps' (USMC's) short take-off and vertical landing (STOVL) variant was supposed to make its international debut in the UK during a 4 July flyby of the country's new aircraft carrier.

Pentagon officials "issued a directive to ground the F-35 fleet based on initial findings" from the investigation of a 23 June fire aboard an F-35A at Eglin Air Force Base in Florida, according to Pentagon Press Secretary Rear Admiral John Kirby. The conventional take-off and landing (CTOL) A-model and the carrier variant C-model had previously been temporarily suspended from conducting flight operations over safety concerns.

Adm Kirby said on 8 July that officials are still considering whether to permit the F-35 to fly at two UK air shows this month but that a decision is to be made "pretty soon".

"We'd be disappointed if we didn't take it to Farnborough," he said, referring to the Farnborough International Airshow during a Pentagon press briefing. Still, "no one wants to rush these aircraft back into the air", he added.

According to Hawn, the US Navy will determine whether or not its fleet of F-35Bs will be permitted to fly in time for the air show. "If [US Naval Air Systems Command] as the air worthiness authority doesn't restore flight, the Marines will not be authorised to go," she said.

Meanwhile, Secretary of Defense Chuck Hagel plans to visit Eglin Air Force Base on 10 July to "send a strong message to our international partners that the US remains fully committed to the F-35 programme". Hagel will meet with investigators who are seeking information about the cause of the 23 June fire, according to Adm Kirby.
Logged
duje
kapetan bojnog broda
*
Offline Offline

Gender: Male
Posts: 17 876



« Reply #168 on: July 15, 2014, 05:01:34 pm »

Vir: Defender hr
http://www.defender.hr/

F-35 može "ograničeno" letjeti nakon incidenta sa požarom

Datum objave:
15.07.2014

F-35 je dobio zeleno svjetlo sa zadrškom za ponovno pokretanje letačkih operacija nakon istrage uzroka nedavnog požara u zadnjem dijelu aviona. Pentagon je objavio kako je avion dobio "ograničenu dozvolu za letenje".  Nije posve sigurno hoće li avion premijerno izvesti let u Europi tijekom održavanja zrakoplovne priredbe Farnborough 2014. Avion je trebao premijerno poletjeti jučer nakon što je prošli petak otkazan nastup na Royal International Air Tattoo u engleskom Fairfordu, Gloucestershire.



* article-gallery-big-1405423343_627.jpg (16.54 KB, 522x293 - viewed 73 times.)
Logged
duje
kapetan bojnog broda
*
Offline Offline

Gender: Male
Posts: 17 876



« Reply #169 on: July 28, 2014, 05:55:55 pm »

Vir: Defender
http://www.defender.hr/

Prva dva borbena aviona F-35 za Australiju izašla iz tvornice u Texasu
 
Photo: Lockheed Martin
Datum objave:
28.07.2014

Prva dva Lockheed Martin F-35 Lightning II Joint Strike Fighter borbnena aviona za potrebe australskog ratnog zrakoplovstva napustila su pogone Fort Worth u Teksasu 24. srpnja. Svečanost, kojoj je prisustvovao i šef RAAF-a Air Marshal Geoff Brown i drugi dužnosnici, označio je početak isporuke ukupno 72 aviona za Australiju.

Avioni AU-1 i AU-2 sada će prema planovima obaviti funkcionalne provjere sustava goriva prije nego što budu prebačene na pilotsku liniju za provjere aviona na zemlji i probne letove u sljedećim mjesecima. Oni bi trebali biti isporučeni RAAF-u do kraja godine, a biti će stacionirani u zrakoplovnoj bazi Luke u Arizoni, gdje će se koristiti za obuku australskih pilota. Prvi F-35 će doći u Australiju tijekom 2018.godine, a očekuje se kako će doseći  inicijalnu operativnu sposobnost do 2023.

Prema programu Project AIR 6000, Australija namjerava kupiti do 100 STOVL F-35A kroz tri faze (2A/2B/2C). U studenom 2012, procijenjeno je da je ukupni trošak nabave AUD17 milijardi (USD16 milijardi), a operativni troškovi za flotu od oko 100 aviona kroz 30 godina oko AUD20 milijardi. Dok AU-1 i AU-2 koštaju svaki USD130 milijuna, troškovi F-35A će pasti na USD80 milijuna do 2018-19.

 


* article-gallery-big-1406547788_495.jpg (37.92 KB, 700x479 - viewed 131 times.)
Logged
Adler
potporučnik
*
Offline Offline

Posts: 2 160


« Reply #170 on: August 11, 2014, 11:12:13 pm »

Will the F-35 Dominate the Skies?

Breaking down the controversial 5th generation fighter.
Robert Farley
December 27, 2013

nationalinterest.org

What are we to make of the F-35 Lightning II Joint Strike Fighter (JSF)? Over the past several months, several pieces of good news about the program have emerged. The Royal Netherlands Air Force just became the second partner organization to operate the F-35. While new reports note a deal is not finalized, a South Korean purchase of the plane looks likely and with Japan already committed the plane looks set to soar in Asian skies. Indeed, while several partners have reduced their commitment over the last year, none have backed out fully. The F-35 Lightning II will, eventually, fly in the service of around a dozen major allied air forces.

We’re Stuck

The classic death spiral describes a process in which rising costs cause political and military authorities to cancel part of an aircraft purchase. As the total numbers drop, the price-per-unit appears to increase, as research, development, and startup costs are included in the numerator. The apparent increase in price then produces a political firestorm, producing more cancellations, further cost increases, a reduced fleet, and difficulties with international partners.

But the problem in this case is that the death spiral won’t lead to the actual death of the F-35. The fighter has, effectively, become unkillable. In the wake of negative experiences with the B-2 Spirit, the F-22 Raptor, and several other programs, Lockheed Martin and the Pentagon worked very hard to ensure that no one could kill the F-35. Three US services committed to acquiring substantial numbers of Joint Strike Fighters, with only minimal hedging with respect to alternatives. International partners bought in, often at considerable political cost. The result is an aircraft that perhaps should undergo a “death spiral,” but cannot; no matter how expensive the cheap alternative to the F-22 becomes, it cannot be killed. It is what it is, and we’re stuck with it.

That stark reality aside, what would a wiser policy with respect to the JSF have looked like? The hope that the plethora of existing warplanes could be economically replaced by a single airframe was deeply misplaced; the operational costs of new F-35s will exceed that of older aircraft for quite some time. The F-15, F-16, F/A-18, and A-10 remain more than capable of accomplishing most missions that the F-35 will conduct. Indeed, for many of the missions associated with the modern practice of airpower, A-1 Skyraiders and F-4 Phantom would perform perfectly well. The best hedge against failure of the F-35 program would have been investment in modernized versions of legacy aircraft, which could perform the traditional missions that do not require the specialized capabilities of the F-22 or F-35. Sadly, the attractiveness of this option to Congressional budget hawks meant that the Pentagon had to close the door on it as tightly as possible.

Designing Fighters in Peacetime

The F-35 is designed to excel in contexts that emphasize Beyond Visual Range (BVR) aerial combat in a highly networked, information-intensive environment. The capabilities of the aircraft are truly remarkable, if they work as promised and if the Lightning II is purchased in sufficient numbers to take advantage of its cooperative nature. Critics of the F-35 point out that it comes up short on many basic “fighter” characteristics, but if it works properly it doesn’t need those traits. However, at this point it is not obvious that the F-35 will ever operate in the role that its designers have intended.

Historically, fighter aircraft are often pressed into roles other than what they were designed for. This is especially true of fighters developed in peacetime. Designers and political decision-makers only rarely manage to make the right guess with respect to what the next war will look like, or what the next fighter will need. The P-40 Warhawk, which became one of the finest attack aircraft of World War II, was initially designed as an air superiority fighter. The P-51 achieved its greatest success as an escort for daylight bomber raids over Europe, a mission which the Army Air Forces considered unnecessary when the Mustang first entered production. Conversely, the legendary Messerschmitt Me 262 Swallow was redesigned as a fighter-bomber before being shifted back -- very successfully-- into an interceptor role.

Similarly, most early American fighters during the Cold War were designed to hunt and kill Soviet bombers approaching the United States. In practice, they were forced into air superiority and fighter-bomber roles, with moderate success. The F-15 and F-16, also designed for air superiority, have more often acted in strike roles. Even the F-14 Tomcat was eventually re-equipped for strike. The Harrier was intended for a nuclear context, in which fixed runways would be destroyed by Soviet tactical warheads.

Moreover, the previous generation of fighter and attack aircraft, including the Eagle, Viper, and Warthog, emerged as the lessons of Vietnam were still fresh in memory (the legendary F-86 Sabre was designed under similar conditions). Pilots and designers approached the aircraft of the 1970s with an understanding of how the previous aircraft had failed, and of how critical improvements could be made. The F-35 has been developed under fundamentally dissimilar conditions; the F-15 and F-16 have not failed, but we are trying to envision how they might fail in the future, in order to solve problems that are necessarily conjectural.

The point is that the F-35 will likely be used under conditions that its developers do not currently envision. It is, if anything, a second-order peacetime aircraft, designed primarily around an imaginary -- if plausible -- vision of what future air combat might look like.

The Future of the F-35

The F-35 will have a future. A different question is whether the type of warfare embodied in the F-35 will ever become central to U.S. strategic interests. High-intensity combat against a peer competitor opponent, or into the teeth of an advanced anti-access/area denial (A2/AD) system, may not occur within the lifetime of the airframe. But if the opportunity comes to demonstrate the F-35’s quality, the result could very well be magnificent, or magnificently disastrous. Similarly, the F-35B has the potential to be a ‘game changer’ in its own right; the short take-off and vertical landing (STOVL) version of the Lightning II may give several countries the capability to operate a modern, supersonic fighter from small carriers. As the Falklands War demonstrated, even Harriers could pose a significant problem for aggressor air forces seeking to strike deployed naval units.

Even if the F-35 faces problems, they will be in great part covered up by the other advantages that the United States military enjoys:

· Training: Although China’s People's Liberation Army Air Force (PLAAF) and other air forces have undoubtedly increased their ability to recruit and develop human capital, it is unlikely that any country will match the ability of the United States to recruit and train pilots. Great pilots can make up for inferior airframes.

· Reliable Equipment: America’s greatest contribution to military history is, in large part, its logistical genius. Complexity notwithstanding, the F-35 is likely to always have the weapons, spares, maintenance, and aircrew it needs to operate at its maximum effectiveness.

· The Joint Fight: Evaluating the independent contribution of the F-35 will be difficult, because it will always act as part of a team. The F-22, the Long-Range Strike Bomber, the USS Zumwalt (DDG-1000), and numerous other platforms will contribute to winning whatever fight the F-35 becomes engaged in.

· Choosing Our Fight: Finally, the United States enjoys the advantage of almost always being able to choose its fight. If the U.S. military and political leadership really doubt the capacity of the F-35 to win air superiority and strike in hostile conditions, it is unlikely that the F-35 will be asked to do so.

Conclusion

The F-35 Lightning II (or whatever more helpful name is eventually attached to it) will become, along with the Typhoon and the Rafale, the premier fighter fielded by the ‘West’ for the next fifty years. The battle against the F-35, at least in the domestic context, was lost before anyone beyond Lockheed Martin thought about fighting it. We’ll build it, and for better or worse we’ll have to live with it. This is a lesson that Congress and the Pentagon should take to heart when considering the Next-Generation Bomber, the Flight III Arleigh Burke destroyer, and a variety of other major procurement programs. In retrospect, the United States should have hedged by devoting more attention to the F-22 (a position that this author, to his discredit, opposed at the time) or to legacy platforms. But the future of air warfare is hard to predict, and the F-35 may yet do extraordinary things.
Logged
duje
kapetan bojnog broda
*
Offline Offline

Gender: Male
Posts: 17 876



« Reply #171 on: September 10, 2014, 01:07:16 pm »

Vir: Defender hr
http://www.defender.hr/

Lockheed i Pentagon blizu konačnog ugovora za nabavu osme serije borbenih aviona F-35

Datum objave:
10.09.2014

Lockheed Martin Corp je u završnoj fazi pregovora sa Pentagonom oko proizvodnje osme serije borbenih aviona F-35, a dogovor bi mogao biti postignut kroz nekoliko dana ili koji tjedan, izjavili su izvršni direktor tvrtke i visoki vojni dužnosnik.

Posao, u vrijednosti većoj od 4 milijarde dolara, obuhvatit će 43 najnaprednija američka borbena aviona. Lockheed gradi tri modela Joint Strike Fighter, ili Lightning II, za američke vojsku i desetak stranih zemalja. Ministarstvo obrane očekuje da će potrošiti gotovo 400 milijardi USD za razvoj aviona i da će kupiti 2.450 aviona u sljedećim desetljećima. To je najveći američki i svjetski vojni program.

Pratt & Whitney, jedinica United Technologies Corp, je također blizu posla vrijednog više od 1 milijarde USD za 84 motora, ali to će biti odobreno tek nakon Pratt i vlada utvrde uzrok kvara motora zbog kojeg je flota F-35 bila prizemljena nekoliko tjedana ovog ljeta.



* article-gallery-big-1410350524_130.jpg (82.65 KB, 800x600 - viewed 81 times.)
Logged
duje
kapetan bojnog broda
*
Offline Offline

Gender: Male
Posts: 17 876



« Reply #172 on: October 14, 2014, 05:58:16 am »

Vir: "Večernji list" Zagreb
http://www.vecernji.hr/

Zašto je F-35 laka meta za ruske "Flankere"?

Napravljen da bude najbolji lovački "avion-ubojica" svih vremena, F-35 je postao lovina.
    
AUTOR:
Vojna povijest

Američki borbeni avion F-35 trenutačno je jedna od slabijih točaka zapadnih zračnih snaga. Avioni iz obitelji modela Su-30 imaju bolje naoružanje i kvalitetniji dizajn.

Napravljen da bude najbolji lovački "avion-ubojica" svih vremena, F-35 je postao lovina. U svakom scenariju, kada je u ratnim igrama bio dvoboj između aviona F-35 i  Su-30, ruski je avion odnio pobjedu. Američki najnoviji "nevidljivi" avion, koji košta oko 190 milijuna dolara po komadu, toliko je kompliciran i loše dizajniran da je njegov negativan ishod u borbi protiv „Sukhoia“ već unaprijed određen, prenosi portal Russia&India Report.

Njegova kratka i debela krila (koja mu ograničavaju manevarske sposobnosti), velik spremnik za gorivo (koji ga čini manje aerodinamičnijim) i jako vruć motor (kojega svaki malo bolji radar može identificirati) samo su neki od velikih propusta koji bi se mogli pokazati u slučaju borbe.

Uz više od 600 "Flankera" („Sukhoi-27“ i kasnije verzije, kao što su Su-30, Su-34 i Su-35 „Super Flanker“), sudbina aviona pete generacije F-35 izgleda jako crno. Eksperti zrakoplovstva širom svijeta govore da će američki najskuplji lovački razvojni program, (određen na 1 500 milijardi dolara) biti običan trening za "Flankere".

"To je puran", izjavio je inženjer zrakoplovstva Pierre Sprey u intervjuu za nizozemsku televiziju. Samo je nekoliko ljudi kvalificirano pričati o borbenim lovcima kao što je on. Sprey je i član dizajnerskog tima za avione F-16 „Falcon" i A-10 „Warthog", koji su najuspješniji u američkom zrakoplovstvu.

"F-35 je previše težak i spor da bi bio uspješan lovac. Ako se ikad sukobimo s neprijateljem koji ima ozbiljno zrakoplovstvo, bit ćemo u velikim problemima", složio se Winslow T. Wheeler, direktor američkog "Straus" projekta vojne reforme.

Srećom, Sjedinjene Američke Države dosad nisu imale ozbiljnog protivnika na nebu ratom izmorenog Iraka, male Libije i slabog Afganistana. No sreća se može lako okrenuti. Ako se ikada sukobe sa zračnim snagama Rusije, Kine ili Indije, ishod neće biti tako jednostran. Službeno, indijsko zrakoplovstvo pobjedilo je američke lovce četvrte generacije sa svojim mlažnjacima treće i četvrte generacije.

Najveći problem aviona F-35 jest u tome što se američki dizajneri "izvlače" na to što je avion "nevidljiv" i na radar dalekog dometa kako bi kompenzirali lošu brzinu i okretnost. Ali "stealth" više nije ono što je nekada bio; „stealth“ nije nevidljivi plašt.

Da bi stvar postala još gora po Amerikance, ruski odlični radari nadograđuju se, piše portal Defenseindustrydaily.com. "U međuvremenu, najnapredniji ruski radari postavljeni su na napredne ruske raketne sustave zemlja-zrak i infracrvene sustave (IRST) na naprednim ruskim i europskim lovcima. Tako povećavaju domet svog radara protiv svojih "stealth" neprijatelja. Međutim, nikada ne postoji samo jedan radar u ratu. Avion ne može biti 'stealth' za sve radare, uvijek će biti radara koji će ga osvjetljivati sa zemlje ili gledati odozgora - svi će ga moći vidjeti", izjavio je Sprey.
Logged
dzumba
Stručni saradnik - specijalne jedinice
kapetan bojnog broda
*
Offline Offline

Posts: 22 477


« Reply #173 on: October 14, 2014, 06:05:25 pm »

Quote
Službeno, indijsko zrakoplovstvo pobjedilo je američke lovce četvrte generacije sa svojim mlažnjacima treće i četvrte generacije.

А где их је то победило? На некој вежби или симулацији на компјутеру?
Logged
Adler
potporučnik
*
Offline Offline

Posts: 2 160


« Reply #174 on: October 14, 2014, 06:09:23 pm »

Bila je zajednička vežba američkog i indijskog RV pre nekoliko godina.

U svakom slučaju nije sporno da velika većina današnjih lovaca može da se obračuna sa F-35.
Logged
pvanja
kapetan korvete
*
Offline Offline

Gender: Male
Posts: 6 286



« Reply #175 on: October 15, 2014, 08:14:00 am »

Koliko ja znam na toj vezbi nije ucestvovao F-35 a ni F-22.
Logged
jeremijaljesina
stariji vodnik
*
Offline Offline

Posts: 868


« Reply #176 on: October 15, 2014, 09:00:55 am »

Bila je zajednička vežba američkog i indijskog RV pre nekoliko godina.

U svakom slučaju nije sporno da velika većina današnjih lovaca može da se obračuna sa F-35.

Čemu stalno mješanje baba i žaba?
Logged
kumbor
Stručni saradnik - opšti
kapetan bojnog broda
*
Offline Offline

Gender: Male
Posts: 17 583


« Reply #177 on: October 15, 2014, 09:34:29 am »


ne znam o kakvim je babama i žabama reč, ali činjenica je da F-35 ima moćan radar i odlične rakete AMRAAM. S druge strane, ako pusti protivnika na bliže od 40-50km., ako je protivnik dobar MiG ili Su-27 i pilot obučen, pilot F-35 će imati šansu da se katapultira pre nego pogine. Roll Eyes
Logged
dzumba
Stručni saradnik - specijalne jedinice
kapetan bojnog broda
*
Offline Offline

Posts: 22 477


« Reply #178 on: October 15, 2014, 05:35:42 pm »

Колико се мени чини раздобље витешких двобоја авиона у ваздуху давно је завршено. Сада су важнији системи за даљинско осматрање и навођење авијације, као и ракете ваздух-ваздух великог домета. Побеђује онај који има квалитетнији  и далекометнији систем осматрања, далекометније ракете и боље радаре за осматрање и гађање на самом авиону. Маневарске способности самог авиона су мање битне. 
Logged
jeremijaljesina
stariji vodnik
*
Offline Offline

Posts: 868


« Reply #179 on: October 15, 2014, 05:44:43 pm »

o tome i govorim kad spominjem babe i žabe - integrirana avionika, data linkovi, integracija sa ostalim avionima na nebu - to sve gura Eurofightera, F-22 i F-35 daleko ispred bilo kakvih aviona ruske proizvodnje. Rusi sigurno imaju agilnije modele ali još uvijek su zastarjele avionike i premalog su broja.
Logged
Pages:  1 2 3 4 5 6 7 8 9 10 11 [12] 13 14 15 16 17 18 19 20 21 22 23 24 ... 55   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2013, Simple Machines
Simple Audio Video Embedder

SMFAds for Free Forums
Valid XHTML 1.0! Valid CSS!
Page created in 0.032 seconds with 21 queries.