Američki lovac šeste generacije

• 0Niko još nije pohvalio poruku.
  Registruj se da bi pohvalio/la poruku!

US to Develop 6th Generation Fighters to Outrun Russian, Chinese Jets

Citat:The US Air Force and Navy plan to pursue the development and acquisition of sixth-generation F/A-XX fighters; they consider the fleet of existing jets incapable of handling their Russian and Chinese fifth-generation counterparts, something which they feel constitutes a real threat to national security.

[Link mogu videti samo ulogovani korisnici]

• 0Niko još nije pohvalio poruku.
  Registruj se da bi pohvalio/la poruku!

Uloguj se preko Facebooka da bi video sliku:

Evo ga i Northrop

Northrop: Beating heat leads sixth-generation fighter challenges

Citat:Thermal management will be a critical factor in a brewing competition to replace hundreds of Lockheed Martin F-22s and Boeing F/A-18E/F Super Hornets, says a top Northrop Grumman executive.

Releasing a new artistic concept of a so-called sixth-generation fighter on 11 December, Northrop Aerospace Systems president Tom Vice singled-out the critical but often overlooked quality of managing all the heat generated by ever-more powerful weapons and sensors anticipated on future combat aircraft.

Northrop’s sixth-generation fighter concept shows the stealthy, swept-wing fighter using a powerful laser weapon to engage multiple targets. Even the best high-power lasers are only 32-33% efficient, meaning 2MW of heat is generated for every 1MW of energy that can be formed into a laser beam, Vice says.

That creates a difficult problem for a stealthy combat aircraft. Venting the heat offboard only raises the aircraft’s visibility to heat-sealing sensors. Another option is to develop a thermal accumulator, which is a path the Air Force Research Laboratory is pursuing under the INVENT programme. An electrical accumulator stores the energy onboard in the same way as a hydraulic accumulator, releasing the latent energy as necessary to generate a surge of power.

But Northrop’s sixth-generation fighter concept eschews the accumulator concept for thermal management. According to Vice, such a system imposes a limitation on the laser weapon’s magazine size or firing rate, forcing the pilot to exit combat until the accumulator is refilled with energy. Northrop is pursuing a concept instead that does not rely on accumulators or offboard venting to manage the heat, but Vice declines to elaborate on the company’s specific approach to solving the thermal management problem.

Northrop’s concept shows a tailless, possibly supersonic vehicle, promising a new breakthrough in manoeuvrability, speed and stealth for a combat aircraft. It also departs from previous sixth-generation fighter concepts released by Northrop by featuring a swept wing, replacing an aft-mounted straight or slightly forward swept wing on previous designs.

The Lockheed Martin F-22 was the first aircraft to blend supersonic cruising speed, advanced stealth and extreme agility in the same package, building on the Northrop’s B-2’s breakthrough combination of stealth and size.

Putting all of those qualities in a package with a new revolution in thermal management technology is the goal for winning the US Air Force’s F-X programme and the US Navy’s FA-XX programme, Vice says.

“The B-2 brought a lot of technology together in a very unique package,” he says. “This airplane will now combine a lot of that, and thermodynamics will be a key discriminator in who wins.”

[Link mogu videti samo ulogovani korisnici]

• 0Niko još nije pohvalio poruku.
  Registruj se da bi pohvalio/la poruku!

Uloguj se preko Facebooka da bi video sliku:

Northrop NGAD


Citat:
While Northrop doesn’t say it—both aircraft designs are likely to use adaptive cycle engine technology—which optimize the power plant’s bypass ratio for its given airspeed and altitude. Both the Air Force and Navy are working on adaptive cycle engines. But Navy is taking it a step further, instead of just an adaptive fan that just generates a third cooling stream, the Navy’s Variable Cycle Advanced Technology (VCAT) program is working on an adaptive turbine. If the Pentagon and industry combine the technologies from VCAT with the Air Force’s Adaptive Engine Technology Development (AETD) and follow-on Air Dominance Adaptive Propulsion Technology (ADAPT) efforts, it should yield huge performance gains. That means that next-generation fighters could have a lot of excess power available for directed energy weapons.

Citat:In terms of raw aerodynamic performance, the F/A-XX and NGAD are likely have similar performance to the Lockheed Martin F-22 Raptor—which has the best flight performance of any operational fighter ever built. Like the Raptor, the new aircraft will blend supersonic cruising speeds of around Mach 1.8 with advanced stealth and extreme agility. However, the new aircraft, if completed, will be orders of magnitude more stealthy over a wider range of frequencies. There will also be more emphasis on defeating infrared sensors and other alternative detection methods.

Combining those traits with breakthrough thermal management technology will be the key to winning the future NGAD and FA-XX contests. “The B-2 brought a lot of technology together in a very unique package,” Vice told Flight. “This airplane will now combine a lot of that, and thermodynamics will be a key discriminator in who wins.”

[Link mogu videti samo ulogovani korisnici]

• 3Ovo se svidja korisnicima: Gargantua, mean_machine, amaterSRB
  
  Registruj se da bi pohvalio/la poruku!

mean_machine ::@Ranxerox

Ni tad nije bilo patriotizma vec si imao vise kompanija pa je bilo lakse izabrati sto bolji projekat za istu svotu. Danas jedino mogu da racunaju da ce Boeing da se ozbiljno potrudi ne bi li razbio monopol Lokida.

Svojevremeno je tadasnji Lokid dobio pare za razvoj U-2, kada su ga zavrsili ostalo im je para, visak su vratili. Neka druga, davna nekorporativna Amerika i svet...

A ako cemo realno Lokidu su uvek isli ti "Black Projects" kao U-2, SR-71 i F-117 ali ne i avioni koji su trebali biti pristupacniji, klasicniji dizajni.

Najbolji je bio Mcdonald Daglas( samo pomenuti A-4, F-4, F-15, F-18,) koje je pojeo Boing a General Dynamics( F-16) je pojeo Lokid. Jedino je Grumman(F-14) otisao pod okrilje Northropa i postao Northrop Grumman(T-38, F-5, F-20, B-2 i verovatno zauvek neprezaljeni YF-23).

Danas ostadose mrtvi Boing i Lokid...

• 0Niko još nije pohvalio poruku.
  Registruj se da bi pohvalio/la poruku!

Sumnjam da će imati agilnost F-22 bez vertikalnih manevarskih površina i nemogučnosti 3D TVC. Znači da će ga kod zaokreta uvek morati najpre okrenuti oko uzdužne ose da bi počeo jaće zaokretati. Tu će zasigurno gubiti koje delove sekunda.

• 0Niko još nije pohvalio poruku.
  Registruj se da bi pohvalio/la poruku!

A negde pise da nece imati TVC ? Umesto FBW sigurno Fly By Fiber Optics

• 0Niko još nije pohvalio poruku.
  Registruj se da bi pohvalio/la poruku!

Uloguj se preko Facebooka da bi video sliku:

Gledam ove predloge i setim se:

[Link mogu videti samo ulogovani korisnici]

• 0Niko još nije pohvalio poruku.
  Registruj se da bi pohvalio/la poruku!

Rade na defanzivnom laseru za obaranje raketa koji bi se kao kontejner mogao nositi i na postojecim F-22 i F-35.

USAF considers defensive lasers for future fighters

Citat:The dawn of the combat laser era might begin in 2021 when the US air force hopes to begin demonstrations of a podded electric laser system for fifth and sixth-generation fighter jets that can destroy incoming missiles, not just steer them off course.

Today, the air force research laboratory started gathering market information under an advanced technology demonstration programme known as SHiELD, or self-protect high-energy laser demonstrator.

According to the request for information notice, the project seeks to integrate a “moderate power” electric laser into a protective pod for supersonic combat jets, including fifth-generation jets like the Lockheed Martin F-35 and F-22 as well as future fighters and bombers.

“SHiELD seeks to expand moderate power (tens of kilowatts) laser weapon operation into the supersonic regime by demonstrating system performance under transonic flight, and acquiring aero-effects data under a supersonic environment relevant to current and future tactical aircraft,” the notice states.

“Advanced laser options under investigation are those with size and weight appropriate for integration as part of a complete laser weapon system into an aerodynamic integrated pod-like structure carried by a tactical aircraft.”

The laser pod would be significantly more powerful than current-generation self-protection capabilities like Northrop Grumman’s directional infrared countermeasure (DIRCM) system. It’s added power could burn or otherwise disable infrared and radar-guided missiles at high speeds.

Military scientists hope to validate the laser pod in a laboratory environment (technology readiness level four) by 2017 and be ready for prototype demonstration by 2021, the notice says.

The air force has long sought to introduce airborne laser weapons, but the technology remains elusive. Lockheed Martin has explored laser weapon options for the F-35, and US special operations forces want to install a laser gun on the new AC-130J Ghostrider gunship by 2020.

Instead of chemical lasers that were favoured for the defunct Boeing YAL-1A airborne laser testbed, air force and industry officials now see electric-powered lasers as the best way forward.

[Link mogu videti samo ulogovani korisnici]

• 0Niko još nije pohvalio poruku.
  Registruj se da bi pohvalio/la poruku!

posto su ameri i ovako odmakli sa ovim generacijama (najblizi konkurenti imaju tek prototipove 5 gen, ostali ni to), zar ne bi bilo jeftinije ponovo pokrenuti liniju za f22, i nabudziti ga najnovijim tehnologijama?

ustedeli bi gomile para sto bi dali u razvoj. ovako bi vec imali osnovu, i samo bi trebalo da dograde.
imali bi recimo avionce generacije 5++

+ ne bi cekali 20 god na razvoj nego bi za 2-4 god imali novu igracku

• 0Niko još nije pohvalio poruku.
  Registruj se da bi pohvalio/la poruku!

Ne znam kako si dosao do toga ali ne moze to tako. Ovo sto sam ja postavio u poslednjih par strana je sve u labartorijskoj fazi razvoja. A sve ovo sto northrop prica o toploti i laserima zahteva novu platformu gde ce to sve da smeste. Nista posebno nebi dobio sa totalnim redizajnom dizajna starog 20 godina. Cak naprotiv.

Ovi dizajni leteceg krila ce omoguciti mnogo veci dolet/vreme ostajanja u vazduhu bez tankanja sto je jedan od zahteva. Veci nivo stelta, novi materijali, novi motori sa promenljivim ciklusom rada... Nekakav novi radar jos ni ne spominju...