F-35 JSF

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P44

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Re: F-35 JSF
« Responder #300 em: Setembro 25, 2010, 12:53:15 pm »
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Summary of Dutch MoD Report to Parliament
   
   
(Source: defense-aerospace.com; posted Sept. 24, 2010)
 
   
   By Dutch analyst Johan Boeder
 
 
   
   1) There is as yet no outcome from the CAPE analysis, but Dutch MoD worked together with JPO to do some analysis of the Dutch situation. Intermediate results show that there will be considerable consequences for Dutch F-16 Replacement Project.

In other words, costs are much higher than predicted in the Dutch F-16 Replacement budget of about EUR 5 billion.

Since 2002, a total of 85 F-35As was planned to replace the Dutch air force’s current F-16s, to be purchased in two batches (57 and 28 aircraft). At this moment purchase of the second batch seems unlikely, based at the latest price information.

2) Negotiations on the LRIP-4 contract with Lockheed-Martin are finalized. but not those with Pratt & Whitney on the F135 engine, so there is still uncertainty about F135 engine prices.

3) The Dutch budget for FY2011 shows a shift toward a delivery of first F35s in 2016 (with exception of first LRIP-3 and LRIP-4 aircraft for IOT&E) as well as a shift in F35 project expenses to other years (in general, delay of a two-three years.

This will mean slower growth in the F-35 production curve in Fort Worth.

4) The decision about how to cancel the LRIP-3 and LRIP-4 aircraft and long lead items is still waiting on cost information of the US Government and the JPO.

-ends-
   http://www.defense-aerospace.com/articl ... -rise.html
"[Os portugueses são]um povo tão dócil e tão bem amestrado que até merecia estar no Jardim Zoológico"
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P44

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Re: F-35 JSF
« Responder #301 em: Outubro 04, 2010, 09:27:55 pm »
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New Technical Problems Ground F-35 Test Planes
   
   
(Source: Fort Worth Star Telegram; published Oct. 2, 2010)
 
 
   
   The Pentagon and Lockheed Martin have grounded all eight F-35 flight-test airplanes due to new technical problems, further delaying testing that is already behind schedule.

Four of the test airplanes were already parked awaiting repairs, Aviation Week reported Friday, and the rest were grounded this week after discovery of a software problem that could have shut down fuel pumps in flight.

"Although we've never experienced this anomaly in any flight condition, we have suspended all flight operations as a precaution," Lockheed said in a statement.

The F-35 has three pumps that provide fuel to the engine that powers the aircraft. Lockheed and BAE Systems, which developed the fuel system software, "have identified a fix and begun testing that software in our labs," the Lockheed statement said.

Aviation Week reported that new software would be ready for installation on the aircraft by early next week.

The four F-35B short-takeoff-vertical-landing aircraft were parked last week after discovery of a problem with an air inlet door.

The F-35B testing has lagged well behind the most recent revised schedule due to technical problems.


(EDITOR’S NOTE: This and previous technical problems that have surfaced during the JSF’s flight testing cast considerable doubt on Lockheed’s long-standing position that computer modeling has made protracted flight testing unnecessary.)

-ends-

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armando30

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Re: F-35 JSF
« Responder #302 em: Outubro 12, 2010, 02:40:45 pm »
alguém me pode explicar se existe alguma diferença entre o sistema STOVL utilizado pelo F-35B e o sistema VTOL utilizado pelo Harrier entre outros (pelo menos lembro-me de um VTOL japonês)
 

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Cabeça de Martelo

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Re: F-35 JSF
« Responder #303 em: Outubro 12, 2010, 04:09:52 pm »
:arrow: http://en.wikipedia.org/wiki/Lockheed_M ... g_II#F-35B

Ou seja, no Harrier tens um motor com 4 saidas ( http://en.wikipedia.org/wiki/File:RR-408_Pegasus.jpg ), no F-35 B, tens dois motores, um para o voo vertical e outro para o voo horizontal (http://en.wikipedia.org/wiki/File:Engine_of_F-35.jpg ).

O conceito do F-35 B baseia-se no Yak-38 ( http://en.wikipedia.org/wiki/Yakovlev_Yak-38 ).
Contra a Esquerda woke e a Direita populista marchar, marchar!...

 

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armando30

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Re: F-35 JSF
« Responder #304 em: Outubro 12, 2010, 04:57:20 pm »
Citação de: "Cabeça de Martelo"
:arrow: http://en.wikipedia.org/wiki/McDonnell_ ... Harrier_II

 :arrow: http://en.wikipedia.org/wiki/Lockheed_M ... g_II#F-35B

Ou seja, no Harrier tens um motor com 4 saidas ( http://en.wikipedia.org/wiki/File:RR-408_Pegasus.jpg ), no F-35 B, tens dois motores, um para o voo vertical e outro para o voo horizontal (http://en.wikipedia.org/wiki/File:Engine_of_F-35.jpg ).

O conceito do F-35 B baseia-se no Yak-38 ( http://en.wikipedia.org/wiki/Yakovlev_Yak-38 ).


obrigado
 

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Edu

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Re: F-35 JSF
« Responder #305 em: Outubro 12, 2010, 05:25:50 pm »
Citação de: "Cabeça de Martelo"
:arrow: http://en.wikipedia.org/wiki/McDonnell_ ... Harrier_II

:arrow: http://en.wikipedia.org/wiki/Lockheed_M ... g_II#F-35B

Ou seja, no Harrier tens um motor com 4 saidas ( http://en.wikipedia.org/wiki/File:RR-408_Pegasus.jpg ), no F-35 B, tens dois motores, um para o voo vertical e outro para o voo horizontal (http://en.wikipedia.org/wiki/File:Engine_of_F-35.jpg ).

O conceito do F-35 B baseia-se no Yak-38 ( http://en.wikipedia.org/wiki/Yakovlev_Yak-38 ).

Caro Cabeça de Martelo, a afirmação de que o F-35B tem dois motores é errada, o F-35B tem apenas um motor.

Existe sim um ventilador atrás do cockpit e à frente do motor, ventilador este que esta ligado ao motor por um dispositivo semelhante a uma embraigem e que envia mais ou menos potencia para o ventilador consoante as necessidades.

O motor em si tem 3 saídas, uma de gases quentes, o escape principal, e outras duas laterais de gases frios saídos do compressor do motor. Na realidade, o F-35B quando em modo hover assenta em 4 "colunas" de tracção (3 do motor e uma do ventilador vertical) tal como fazia o Harrier.
 

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papatango

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Re: F-35 JSF
« Responder #306 em: Outubro 15, 2010, 10:20:41 pm »
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O conceito do F-35 B baseia-se no Yak-38
:mrgreen:  :mrgreen:

E em que fórum de entusiastas é que isto terá sido dito ?  :roll:  :mrgreen:  :mrgreen:  :mrgreen:

(foi demasiado forte, não resisti)
 :G-beer2:  :G-beer2:
É muito mais fácil enganar uma pessoa, que explicar-lhe que foi enganada ...
Contra a Estupidez, não temos defesa
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JLRC

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Re: F-35 JSF
« Responder #307 em: Outubro 16, 2010, 12:15:40 am »
Citação de: "Cabeça de Martelo"
O conceito do F-35 B baseia-se no Yak-38 ( http://en.wikipedia.org/wiki/Yakovlev_Yak-38 ).

Penso que te enganaste, provavelmente querias dizer Yak-41, certo?

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Lockheed-Martin
Following the announcement by the CIS that it could no longer fund development of the Yak-41M, Yakovlev immediately entered into discussions with several foreign partners who could help fund the program (a tactic they were also pursuing for development of the Yak-130 trainer, which was eventually developed in partnership with Aermacchi of Italy). Lockheed-Martin, which was in the process of developing the X-35 for the U.S. Joint Strike Fighter program, quickly stepped forward, and with their assistance 48-2 was displayed at the Farnborough Airshow in September 1992. Yakovlev announced that they had reached an agreement with Lockheed-Martin for funds of $385 to $400 million for three new prototypes and an additional static test aircraft to test improvements in design and avionics. Planned modifications for the proposed Yak-41M included an increase in STOL weight to 21,500 kg (47,400 lb). One of the prototypes would have been a dual-control trainer. Though no longer flyable, both 48-2 and 48-3 were exhibited at the 1993 Moscow airshow. The partnership began in late 1991, though it was not publicly revealed by Yakovlev until 6 September 1992, and was not revealed by Lockheed-Martin until June 1994.[1]

[edit] Yak-41 or Yak-141
The design was initially designated the Yak-41M by the Soviet military. Once testing commenced, and the two prototypes began accumulating numerous world class records, it became necessary to invent a designation for use in the west, as the name Yak-41M was classified. The designation Yak-141 was selected, and it was by this name that the aircraft became known to western allies, though officially the aircraft's designation remained Yak-41M within the Soviet military. In 1991 Lockheed-Martin entered into partnership with Yakovlev to further develop an aircraft they had always known as the Yak-141. Largely as a result of this agreement, by 1992 Yakovlev changed the aircraft's designation to Yak-141 for the two flyable prototypes. Series production in Russia could have resulted in additional modification to the designation.[1]


PS:
O papatango deixou de tomar a medicação? :?:
 

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Edu

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Re: F-35 JSF
« Responder #308 em: Outubro 16, 2010, 12:25:06 am »
Mas o papatango tem razão, o F-35B tem um conceito diferente do Yak-38, sendo um conceito que nunca tinha sido aplicado antes.
Curiosamente tanto o Harrier, como o Yak-38 e como o F-35B tem conceitos diferentes entre eles.
 

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Cabeça de Martelo

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Re: F-35 JSF
« Responder #309 em: Outubro 16, 2010, 10:42:57 am »
PT só porque foste mau para mim...TOMA!


 :lol:
Contra a Esquerda woke e a Direita populista marchar, marchar!...

 

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papatango

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Re: F-35 JSF
« Responder #310 em: Outubro 16, 2010, 06:17:12 pm »
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PT só porque foste mau para mim...TOMA!

Eh eh eh  :mrgreen:  :cry:  :oops:  :oops:
É muito mais fácil enganar uma pessoa, que explicar-lhe que foi enganada ...
Contra a Estupidez, não temos defesa
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typhonman

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Re: F-35 JSF
« Responder #311 em: Outubro 17, 2010, 12:25:08 am »
Lembram-se da discussão "Que avião para o Atlântico ? "  :mrgreen:
 

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Jorge Pereira

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Re: F-35 JSF
« Responder #312 em: Outubro 17, 2010, 12:11:09 pm »
Citação de: "typhonman"
Lembram-se da discussão "Que avião para o Atlântico ? "  :arrow: viewtopic.php?f=27&t=76

 :G-beer2:
Um dos primeiros erros do mundo moderno é presumir, profunda e tacitamente, que as coisas passadas se tornaram impossíveis.

Gilbert Chesterton, in 'O Que Há de Errado com o Mundo'






Cumprimentos
 

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P44

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Re: F-35 JSF
« Responder #313 em: Outubro 19, 2010, 02:04:34 pm »
Aparentemente o Canadá poderá retirar-se do projecto JSF sem sofrer represálias

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The 2006 agreement for developing the controversial F-35 stealth fighter jets contains a withdrawal clause that would allow a new government to end Canada's participation with no penalties and appears to contradict the government's claim that Canadian firms involved up to now would suffer.

http://www.defense-aerospace.com/articl ... ogram.html
"[Os portugueses são]um povo tão dócil e tão bem amestrado que até merecia estar no Jardim Zoológico"
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typhonman

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Re: F-35 JSF
« Responder #314 em: Outubro 19, 2010, 11:42:40 pm »
Penso que a compra de 65 caças foi confirmada ha uns dias atrás...