www.airpower.at
 FAQFAQ    SuchenSuchen    MitgliederlisteMitgliederliste    BenutzergruppenBenutzergruppen 
 RegistrierenRegistrieren
       ProfilProfil    Einloggen, um private Nachrichten zu lesenEinloggen, um private Nachrichten zu lesen    LoginLogin 

Dieses Thema ist gesperrt, du kannst keine Beiträge editieren oder beantworten.
Seite 15 von 17       Gehe zu Seite Zurück  1, 2, 3 ... 14, 15, 16, 17  Weiter
Autor Nachricht
Porsche
ist immer hier
ist immer hier


Anmeldungsdatum: 19.03.2005
Beiträge: 712

BeitragVerfasst am: Fr Mai 18, 2012 13:37:49 
Titel: Re: auch interessant..
Antworten mit Zitat

Viper hat folgendes geschrieben:
Zitat:
USAF: F-35B cannot generate enough sorties to replace A-10



By: DAVE MAJUMDAR WASHINGTON DC 09:53 16 May 2012 Source:

The US Air Force has concluded that the short take-off vertical landing (STOVL) Lockheed Martin F-35B- model aircraft cannot generate enough sorties to meet its needs; therefore the service will not consider replacing the Fairchild Republic A-10 Warthog close air support jet with that variant......


http://www.flightglobal.com/news/articles/usaf-f-35b-cannot-generate-enough-sorties-to-replace-a-10-371985/


Sollte das nicht das A Modell übernehmen? Die B Version war doch Ersatz für die Harrier und die F18 der MArines?
_________________
"Auch wenn man den Schlagstock anstelle eines Gespräch einsetzten kann werden Worte immer ihre Macht behalten. Worte lassen einen Sinn erschließen und für die die bereit sind zuzuhören formulieren sie die Wahrheit..."
V (V wie Vendetta)
Nach oben
Benutzer-Profile anzeigen Private Nachricht senden
Viper
ist immer hier
ist immer hier


Anmeldungsdatum: 07.08.2004
Beiträge: 8981

BeitragVerfasst am: Fr Mai 18, 2012 13:55:05 
Titel: gute Frage...
Antworten mit Zitat

muss sagen, ich hab da schon seit Langem den Überblick verloren, welches Service welches Model da bestellt hat und wann, wo und wie einsetzten will..
Nach oben
Benutzer-Profile anzeigen Private Nachricht senden
Damo
ist immer hier
ist immer hier


Anmeldungsdatum: 31.10.2007
Beiträge: 328
Wohnort: NÖ-Süd (südl. von LOXN)

BeitragVerfasst am: Fr Mai 18, 2012 17:13:13 
Titel:
Antworten mit Zitat

Die F-35 kann doch niemals ein Ersatz für die A-10 sein. Bei einem kleinen Treffer ist die doch schon Manövrierunfähig bei der ganzen Elektronik. Ich möcht sehen wie eine F-35 mit halbem Flügel und zerfetzem Rumpf weiterfliegt.
_________________
"Macht ohne Missbrauch verliert an Reiz".(Paul Valéry)

Der Minister nimmt flüsternd den Bischof beim Arm:
Halt du sie dumm, ich halt’ sie arm! (Reinhard Mey)
Nach oben
Benutzer-Profile anzeigen Private Nachricht senden
Prometheus
ist immer hier
ist immer hier


Anmeldungsdatum: 21.09.2006
Beiträge: 3779

BeitragVerfasst am: Sa Mai 19, 2012 19:04:33 
Titel: Re: auch interessant..
Antworten mit Zitat

Porsche hat folgendes geschrieben:
Viper hat folgendes geschrieben:
Zitat:
USAF: F-35B cannot generate enough sorties to replace A-10



By: DAVE MAJUMDAR WASHINGTON DC 09:53 16 May 2012 Source:

The US Air Force has concluded that the short take-off vertical landing (STOVL) Lockheed Martin F-35B- model aircraft cannot generate enough sorties to meet its needs; therefore the service will not consider replacing the Fairchild Republic A-10 Warthog close air support jet with that variant......


http://www.flightglobal.com/news/articles/usaf-f-35b-cannot-generate-enough-sorties-to-replace-a-10-371985/


Sollte das nicht das A Modell übernehmen? Die B Version war doch Ersatz für die Harrier und die F18 der MArines?


es war mal vor ein paar jahren angedacht, dass die AF einige(300 oder so) B kauft.
Die linie ist immer noch:
nach 2028 oder so, die F-35 die unbeliebte a-10 ablösen soll.
_________________
"I only regret that I have but one life to lose for my country."
Captain Nathan Hale, Continental Army

"you cannot be neutral between democrat and dictator, you can't be neutral between right and wrong."
Mary Harney
Nach oben
Benutzer-Profile anzeigen Private Nachricht senden
Frank
Gast





BeitragVerfasst am: Mo Jul 09, 2012 01:04:01 
Titel:
Antworten mit Zitat

Gestern (July 7th), Stv. MOD Fantino am CBC:
"....es gibt keinen kontrakt, es ist keine definitive entscheidung gefaellt,
kein cent wurde bisher fuer einen F-35 ankauf bereitgestellt,
alles ist offen!"

das hoert sich aber anders an als die sager for einigen moanten. hmmmmm
(Mit wirkung naechsten monat wird er
Minister fuer internationale co-opeartion.)
Nach oben
StefanT
ist immer hier
ist immer hier


Anmeldungsdatum: 08.08.2004
Beiträge: 205

BeitragVerfasst am: Di Jul 24, 2012 10:14:50 
Titel: Großbritannien übernimmt erste F-35B
Antworten mit Zitat

http://www.fliegerweb.com/airliner/news/artikel.php?show=news-9504

Was ich bemerkenswert finde: Im Gegensatz zu Rafale, Gripen, EF gibt es von der F-35 und auch von der F22 keine Doppelsitzer-Version.
Nach oben
Benutzer-Profile anzeigen Private Nachricht senden
Prometheus
ist immer hier
ist immer hier


Anmeldungsdatum: 21.09.2006
Beiträge: 3779

BeitragVerfasst am: Mi Jul 25, 2012 18:06:40 
Titel:
Antworten mit Zitat

zu teuer.

lol

p.s.: Israel8und die müssen das wissen) denkt aber schon an einen zweisitzer.
_________________
"I only regret that I have but one life to lose for my country."
Captain Nathan Hale, Continental Army

"you cannot be neutral between democrat and dictator, you can't be neutral between right and wrong."
Mary Harney
Nach oben
Benutzer-Profile anzeigen Private Nachricht senden
Frank
Gast





BeitragVerfasst am: Di Aug 21, 2012 20:51:33 
Titel: Critics of proposed F-35 jetfighter procurement appear at ND
Antworten mit Zitat

..

OTTAWA - Some of the most vocal critics of the Harper government's plan to buy F-35 jets were on parade today on Parliament Hill.

Winslow Wheeler, a defence procurement expert who worked for U.S. General Accounting Office, says Canada would be foolish to buy the stealth fighters before 2019.

That's when the Lockheed Martin-manufactured fighter exits its development phase.

Wheeler spoke before a group of New Democrat MPs in what the opposition party says is an extension of public accounts committee hearings.

The all-party House of Commons committee held hearings last spring after the auditor general slammed the planned purchase of 65 multi-role fighters.

New Democrat Malcolm Allen says the party organized the hearing, during Parliament's summer recess, in order to get the testimony of experts on-the-record.
..
Nach oben
CHH
int. Luftfahrtjournalist
int. Luftfahrtjournalist


Anmeldungsdatum: 26.07.2004
Beiträge: 1553
Wohnort: Groß-Enzersdorf

BeitragVerfasst am: Mi Aug 22, 2012 13:12:27 
Titel: Der erste Holländer fliegt erste Tests
Antworten mit Zitat


_________________
Wir sind Österreicher. Was bedeutet, daß grundsätzliche Kurskorrekturen und deutliche Prioritätensetzungen nicht unsere Sache sind. Man ist froh, einigermaßen über die Runden zu kommen und Probleme irgendwie auszusitzen. (Zitat v. Alfred Payrleitner)
Nach oben
Benutzer-Profile anzeigen Private Nachricht senden Website dieses Benutzers besuchen
George Sears
ist immer hier
ist immer hier


Anmeldungsdatum: 08.10.2011
Beiträge: 417

BeitragVerfasst am: Mi Aug 22, 2012 17:39:56 
Titel: Einfach nur geil
Antworten mit Zitat

Ich liebe diese Farbgebungen .......
_________________
„Ohne Viper wäre die Welt nur halb so schön“
Nach oben
Benutzer-Profile anzeigen Private Nachricht senden
Frank
Gast





BeitragVerfasst am: Di Aug 28, 2012 04:50:07 
Titel: Neuer Chief of Defence Staff is F-35 fan!
Antworten mit Zitat

Der PM zusammen mit MOD haben den Chief of Defence Staff ausgetauscht.
Gen. Natynczyk war ein LandForce Gen.
Sein ersatz is von der luftwaffe und hat keinen einzigen einsatz im ausland vorzuzeigen.
(Viele ranghohe Can. Offiziere habe einige einsaetze,
siehe Gen's McKenzie, Hillier usw).

Gen Tom Lawson war 'sales man' fuer den F-35 und hat heute gleich am staatsfunk bekanntgegeben das dieser nach wie vor als F-18 ersatz vorgesehen ist.
Das ist aber im widerspruch zu mitteuilungen von hoechster stelle.
So wer hat hier wem im sack?

Die roten haben gute chancen die naechste regierung zu stellen.
Deren einstellung zum F-35 ist ja bekannt.
Nach oben
mhansi
ist sehr oft hier
ist sehr oft hier


Anmeldungsdatum: 17.03.2012
Beiträge: 35

BeitragVerfasst am: Di Aug 28, 2012 09:28:22 
Titel: Re: Neuer Chief of Defence Staff is F-35 fan!
Antworten mit Zitat

Frank hat folgendes geschrieben:
Die roten haben gute chancen die naechste regierung zu stellen.
Deren einstellung zum F-35 ist ja bekannt.


Die Harper Regierung wurde doch erst 2011 in die Regierung gewählt!? Bis die Roten dran kommen, dauert das noch lange. Bedrohlicher dürften da die US Wahlen sein. Danach könnten die USA versuchen die F-35 Kosten weiter auf die Partner abzuwälzen. Die USA zahlen ja die Zeche bisher fast im alleingang.
Nach oben
Benutzer-Profile anzeigen Private Nachricht senden
BUMAN
ist immer hier
ist immer hier


Anmeldungsdatum: 30.07.2004
Beiträge: 1140
Wohnort: CH

BeitragVerfasst am: Di Sep 18, 2012 09:10:27 
Titel: Passivradar raubt Stealth-Jets die Tarnkappe
Antworten mit Zitat

Stealth-Kampfjets sind für die Luftraumüberwachung praktisch unsichtbar - doch damit dürfte es bald vorbei sein. Passivradar ist nach vielen Jahren der Entwicklung offenbar so ausgereift, dass es Tarnkappenflugzeuge entdecken kann. Damit steht eine 20 Jahre dauernde Ära vor dem Ende....

http://www.spiegel.de/wissenschaft/technik/passivradar-nimmt-stealth-jets-die-tarnkappe-a-855711.html
Nach oben
Benutzer-Profile anzeigen Private Nachricht senden AIM-Name
Prometheus
ist immer hier
ist immer hier


Anmeldungsdatum: 21.09.2006
Beiträge: 3779

BeitragVerfasst am: Di Sep 18, 2012 22:40:22 
Titel:
Antworten mit Zitat

das hört man schon seit über 20 jahren.

aber china & russland und alle anderen bauen fleissig nach, eben weil zwischen etwas orten können und etwas bekämpfen können immer noch welten liegen.
_________________
"I only regret that I have but one life to lose for my country."
Captain Nathan Hale, Continental Army

"you cannot be neutral between democrat and dictator, you can't be neutral between right and wrong."
Mary Harney
Nach oben
Benutzer-Profile anzeigen Private Nachricht senden
Frank
Gast





BeitragVerfasst am: Sa Dez 01, 2012 05:18:33 
Titel: On Yahoo News 30 11
Antworten mit Zitat

.
.

Canada's new chief of defence staff has contradicted Defence Minister Peter MacKay by suggesting that other fighter jets do offer some of the stealth capabilities the military needs.

Tom Lawson said during testimony Thursday before the Commons defence committee about the planned $25-billion purchase that most fighter jets offer some degree of stealth capability, including Canada's aging fleet of CF-18s.

Boeing's Super Hornet and the Eurofighter Typhoon have been suggested as alternatives to Lockheed Martin's F-35, which until now appeared to be the only fighter jet Canada was considering.

"It's the only fifth-generation, stealth aircraft that meets Canada's needs," MacKay told reporters as recently as last March.

"There are countries around the world flying the [other aircraft with stealth capabilities] to great success these days," Lawson told MPs on Thursday.

Lawson, himself a former fighter pilot, downplayed the importance of Canada buying a so-called "fifth generation" aircraft. The marketing classification "fifth generation" is used in the United States to signify aircraft with the latest technology as of 2012, including advanced stealth capabilities.

"Fourth and fifth generation is not a very helpful way of looking at that aircraft," Lawson told reporters in a scrum after his testimony.

The purchase of 65 F-35 aircraft was first announced in 2010. But the costs have risen significantly from the $9-billion price tag offered at the time.

After first Parliamentary Budget Officer Kevin Page and then Auditor General Michael Ferguson sounded the alarm over discrepancies in the calculated costs, Rona Ambrose's Public Works Department was put in charge of the fighter jet procurement process.

Part of that review includes evaluating alternatives to the F-35. The military's original statement of requirements for the purchase included some level of stealth capability, but not a particular, "necessary" element of stealth, Lawson said.

Lawson said that while other fighter jets offer an "element" of stealth capability, the F-35 is "better."

But when asked by Liberal defence critic John McKay whether there is only one airplane that can meet the standard of stealth set out in the Canadian military's requirements, Lawson said "no."

"All options are on the table," Lawson told MPs.

That appears to put him at odds with MacKay's claim that only the F-35 meets the requirements to replace the CF-18.

"It is the only plane that can fill the requirement laid out in Canada First Defence Strategy," MacKay told the defence committee in September 2010.

In question period Friday, Ambrose's parliamentary secretary, Jacques Gourde, was taking the opposition's questions on the F-35 procurement.

Speaking in French, he maintained that the seven-point plan being implemented by Public Works for the procurement includes an analysis of "all the options to replace the CF-18."

The defence minister's spokesman, Jay Paxton, says this seven-point plan "includes an analysis of all options to replace the CF-18 that will not be constrained by the [military's earlier] statement of requirements."

"The options analysis is a full evaluation of choices, not simply a refresh of the work that was done before," Paxton says.

Gourde said the Public Works Department is "taking time to do things correctly" and would not say when KPMG, which won a contract worth more than $600,000 to study the cost of the F-35, will finish its work and issue its report.
.. . .
.
Nach oben
Frank
Gast





BeitragVerfasst am: Sa Dez 08, 2012 02:46:11 
Titel: Die suche geht weiter...
Antworten mit Zitat

Als auf heute (cbc, Global...):
F-35 zu teurer fuer Canada za, $ 45 billionen;
der Luftwaffenchef sagt vorm Parliamentskomission aus, meint das auch andere jets Canadas' anforderung erfuellen koennen.
Heute wurde zum ersten mal (laut) die Super Hornet erwaehnt.
Nach oben
Frank
Gast





BeitragVerfasst am: So Dez 09, 2012 02:54:09 
Titel: News Flash!!
Antworten mit Zitat

EF im gespraech!
anstatt ueberteure F-35 fuer Canada!
Nach oben
Frank
Gast





BeitragVerfasst am: Mi Dez 12, 2012 15:06:00 
Titel: More news
Antworten mit Zitat

OTTAWA - A detailed report crunching all of the numbers, contingencies and eye-popping price points of the Harper government's cherished stealth fighter program is due to be officially made public Wednesday, but experts say it may have a short shelf life as the U.S. heads for its so-called fiscal cliff.

The federal scene has been whipped into a frenzy since a series of leaks last week suggested an independent analysis of the cost of the Lockheed Martin-manufactured F-35 could reach past $45 billion over the lifetime of the aircraft.

An analysis done by the accounting firm KPMG will present a range of cost options for the multi-role fighter, depending upon how long the air force intends to fly the plane, and is expected to peg the cost of each individual aircraft at around $88 million.

But the formula for determining the price tag is more complex and depends on the total number of orders the U.S. aircraft giant receives in any given production year.

If one of the nine nations committed to the oft-maligned program reduces or cancels its orders, the price goes up for everyone else.

With Washington poised to slash defence spending, either voluntarily or by the force of a congressional deadline, there is the real possibility the U.S. could dramatically reduce the number of F-35s it intends to buy from the current 2,243.

For American budget hawks "this is a target shining like a bonfire in the dark," said Paul Malliet, a former air force colonel who worked on Canada's acquisition of the current CF-18 fleet.

"It has gotten so expensive, and I wouldn't be at all surprised that this program isn't recognizable in six months."

The program was reset by former Pentagon chief Robert Gates a few years ago because of soaring costs and development delays. At that point, the U.S. Marine Corps version of the jet was put on hiatus until glitches were worked out.

The volatility in the program is one of the reasons the Harper government chose to conduct a market analysis of possible options to replace the CF-18s.

Other experts are also convinced the report being presented Wednesday will have a short shelf life.

"The KPMG assumptions on unit costs were relevant to last year's acquisition plan, not next year," said Winslow Wheeler, a U.S. aviation analyst, and outspoken critic of the stealth fighter program.

"I fully expect that the F-35 in this country will take a significant hit when the fiscal cliff negotiations are finished, whenever that is, and that will have impact on the F-35 unit costs for everybody."

The problem of what to use to replace Canada's current crop of 77 CF-18s should the stealth fighter program become too expensive — or fall apart entirely — is the cause for some hand-wringing in defence circles.

The government and the air force invested a lot of their public relations efforts in casting the offerings of potential rivals as technologically inferior.

The notion of "what if" has crossed the minds of senior officials in Washington, where there has been renewed speculation that the U.S. might be prepared to offer up an export version of its other stealth fighter — the F-22 Raptor.

Allowing allies to buy the advanced interceptor has been prohibited by legislation.

Yet, a recent U.S. Congressional Research Service report, released on Oct. 25, 2012, noted that the F-22 is seen as a possible "hedge against difficulties in the F-35 program."

The notion, however far-fetched, might solve U.S. defence needs, but allies could be left high and dry, Wheeler noted.

"As unaffordable as the F-35 is, the F-22 is almost comical," he said.

Lockheed Martin's production line for the Raptor has been shut down since the Pentagon cancelled further orders after taking delivery of its 195th aircraft. Even if it could be restarted, the unit cost could exceed $200 million per plane, Wheeler said.

Another aspect is the amount of money each partner nation has poured into the research and development of the F-35, a sum that currently totals $335 million for Canada.

Through a memorandum of understanding, Ottawa is committed to dishing out an additional $550 million over the lifetime of the project, not including what it gives separately to Canadian industry.

According to public accounts records, $43 million is earmarked over the next couple of years for Mississauga, Ont.-based Magellan Aerospace's participation in the F-35.

The Harper government underscores it has not put any money towards the purchase of new planes.
Nach oben
Frank
Gast





BeitragVerfasst am: Do Dez 13, 2012 02:43:00 
Titel: Zahlen von heute (12 12)
Antworten mit Zitat

Kost bis heute, Can $ 231 millionen.
40 jahre kost fuer 65 F-35, $ 47.8 billionen!!

Stueckzahle verringerung auf 55 heute zum ersten mal erwaehn!

Zum vergleich: die bundes beampten kosten pro jahr $ 43 billionen, steigend jaehrlich!
Nach oben
Viper
ist immer hier
ist immer hier


Anmeldungsdatum: 07.08.2004
Beiträge: 8981

BeitragVerfasst am: Fr Dez 14, 2012 22:33:10 
Titel: Frankieboy...
Antworten mit Zitat

warum lasst's Ihr Euch in Canada nicht ein schlankes Angebot von Dassault für 50 - 60 Rafales machen..?

passert doch...

Der Rafale putzt eh alles weg...

Dasault montiert brav seit Jahren hunderte ( was heisst mittlerweile sind's bald mehr..) PWC Treiber auf Falcon 2000EX und Falcon 7X..heisst die industrielle Coop zwischen Frankreich und Canada steht eh schon...

zweisprachig ist der Rafale auch...bekommt Ihr English & Quebecois für alle Manuals free-of-charge...

naja, und der gute Falcon 7X ist ja in Canada auf "Cold Weather" getestet worden...

http://www.youtube.com/watch?v=7Wua2OB3E20

das schafft der Rafale locker...

habt's einen Topflieger....zweisprachig...und die Quebecois geben auch a Ruh ein paar Jahr...

win-gagne Situation würd ich meinen...
Nach oben
Benutzer-Profile anzeigen Private Nachricht senden
squale
ist immer hier
ist immer hier


Anmeldungsdatum: 14.11.2011
Beiträge: 100

BeitragVerfasst am: Mi Dez 19, 2012 15:40:05 
Titel: Re: Frankieboy...
Antworten mit Zitat

Viper hat folgendes geschrieben:
warum lasst's Ihr Euch in Canada nicht ein schlankes Angebot von Dassault für 50 - 60 Rafales machen..?


Die wollen sich's mit dem großen Nachbarn wahrscheinlich nicht verscherzen... und ich bin mir sicher, dass die Amis derartigen Druck ausüben können, dass es nicht dazu kommen wird - selbst wenn Kanada für die Rafale wäre.
Nach oben
Benutzer-Profile anzeigen Private Nachricht senden
Viper
ist immer hier
ist immer hier


Anmeldungsdatum: 07.08.2004
Beiträge: 8981

BeitragVerfasst am: Fr Jan 04, 2013 22:00:33 
Titel: naja......
Antworten mit Zitat

squale hat geschrieben:

Zitat:
....und ich bin mir sicher, dass die Amis derartigen Druck ausüben können, dass es nicht dazu kommen wird - selbst wenn Kanada für die Rafale wäre...


Da wär ich mir nicht so sicher....die Obama Administration kann relativ wenig Druck irgendwo in der Welt ausüben, weil die von Niemandem mehr Ernst genommen wird.....for better and for worse....
Nach oben
Benutzer-Profile anzeigen Private Nachricht senden
Frank
Gast





BeitragVerfasst am: Sa Jan 05, 2013 02:40:52 
Titel:
Antworten mit Zitat

obwohl zur zeit alles offen,
Super Hornet hat gute chancen und man/frau weisz ja das ausschreibungen so weit gebogen werden koennen/werden bis zum richtigen ergebnis.
Demnaechst wirds einen neuen MOD geben;
sollte dieser amit den CO RCAF nicht auskommen wird das deck neu gemischt.

Zum Obama sager:
dieser WIRD ernst genommen!
Nach oben
CHH
int. Luftfahrtjournalist
int. Luftfahrtjournalist


Anmeldungsdatum: 26.07.2004
Beiträge: 1553
Wohnort: Groß-Enzersdorf

BeitragVerfasst am: Di Jan 15, 2013 11:15:21 
Titel: Kommt nicht aus den Schwierigkeiten
Antworten mit Zitat

Zitat:
OT&E Reports New F-35 Problems (posted Jan. 14, 2012)

The annual report by Michael Gilmore, the Pentagon’s undersecretary for Operational Test and Evaluation, reveals major new problems with all three versions of the F-35, as well as significant shortfalls in meeting flight test milestones.

“The lag in accomplishing the intended 2012 flight testing content [will] contribute to the program delivering less capability in production aircraft in the near term,” the report says. It was submitted to Congress on Jan. 11 and is due to be made public on Jan. 15, according to OT&E. Its more salient points are excerpted below.

The report’s 17-page section on the F-35, first posted by Time’s Battleland blog, lists a surprising and unexpected number of design and production problems that emerged during the past year’s flight testing, including new airframe cracks; an average availability of less than 35%; vulnerability to PAO and fuel fires; delamination of surface coatings; lowering of performance (for example, acceleration time from 0.8 Mach to 1.2 Mach is increased by at least 43 seconds); severe transonic buffeting, and other issues.

Most critically, testing of the US Marine Corps F-35B STOVL variant was halted “in December 2012 after multiple cracks were found in a bulkhead flange on the underside of the fuselage during the 7,000-hour inspection,” the report reveals.

The report’s 17-page section on the F-35 can be accessed here .


Excerpts from the FY OT&E Report on the F-35

• The program completed two of the eight planned system‑level ballistic test series.

• The first test series confirmed Polyalphaolefin (PAO) coolant and fueldraulic systems fire vulnerabilities. The relevant protective systems were removed from the aircraft in 2008 as part of a weight reduction effort. A Computation of Vulnerable Area Tool analysis shows that the removal of these systems results in a 25 percent increase in aircraft vulnerability.

• The program’s most recent vulnerability assessment showed that the removal of fueldraulic fuses, the PAO shutoff valve, and the dry bay fire suppression, also removed in 2008, results in the F-35 not meeting the Operational Requirements Document (ORD) requirement to have a vulnerability posture better than analogous legacy aircraft.

F-35A Flight Sciences Assessment
• By the end of November, the progress against planned baseline test points for 2012 lagged by over 30 percent (accomplishing 1,338 baseline F-35A flight sciences test points of 1,923 planned through November 2012, for a completion rate of 70 percent).

The test team could not execute this portion (30 percent) of planned 2012 baseline test points for the following reasons:
-- Aircraft operating limitations, which prevented the extended use of afterburner needed to complete high‑altitude/high‑airspeed test points.
-- Higher than expected loads on the weapon bay doors, which required additional testing and thus limited the amount of testing with weapons loaded on the aircraft.
-- Deficiencies in the air-refueling system, which reduced testing opportunities.

• The program announced an intention to change performance specifications for the F-35A, reducing turn performance from 5.3 to 4.6 sustained Gs and extending the time for acceleration from 0.8 Mach to 1.2 Mach by 8 seconds. These changes were due to the results of air vehicle performance and flying qualities evaluations.

Discoveries included:
- Horizontal tail surfaces are experiencing higher than expected temperatures during sustained high‑speed / high‑altitude flight, resulting in delamination and scorching of the surface coatings and structure.

F-35B Flight Sciences Assessment
• Although the program exceeded the objectives planned for sortie rate through the end of November, the progress against planned baseline test points for 2012 lagged by 45 percent with 1,075 test points accomplished against 1,939 planned. This was primarily a result of higher-than expected loads on weapon bay doors, which prevented planned envelope expansion test points and required additional unplanned testing.

• The program announced an intention to change performance specifications for the F-35B, reducing turn performance from 5.0 to 4.5 sustained Gs and extending the time for acceleration from 0.8 Mach to 1.2 Mach by 16 seconds. These changes were due to the results of air vehicle performance and flying qualities evaluations.

Other discoveries included:
- As with the F-35A, horizontal tail surfaces are experiencing higher than expected temperatures during sustained high-speed/high-altitude flight, resulting in delamination and scorching of the surface coatings and structure. The program modified the tail surfaces of BF-2 in September to permit flight testing at higher airspeeds. The coatings delaminated during flight, however, suspending further flight testing in the higher airspeed envelope until a new plan for the coatings can be developed.

F-35C Flight Sciences Assessment
• The program completed 80 percent of the baseline test points planned though November 2012, accomplishing 1,060 test points of a planned 1,327. Flight restrictions blocked accomplishment of a portion of the planned baseline test points until a new version of vehicle systems software became available.

• The program announced an intention to change performance specifications for the F-35C, reducing turn performance from 5.1 to 5.0 sustained Gs and increasing the time for acceleration from 0.8 Mach to 1.2 Mach by at least 43 seconds. These changes were due to the results of air vehicle performance and flying qualities evaluations.

• Discoveries included:
-- Due to the difference in wing design, transonic buffet becomes severe in different portions of the flight envelope and is more severe in the F-35C than the other variants . The program is making plans for investigating how to reduce the impact of transonic roll off in the F-35C with the use of wing spoilers; however, detailed test plans are not complete.

-- As with the F-35A and F-35B, horizontal tail surfaces are experiencing higher than expected temperatures during sustained high-speed/high-altitude flight, resulting in delamination and scorching of the surface coatings and structure. In August, the test team installed new coatings on CF-1 horizontal tails, designed to prevent scorching and delaminating during prolonged use of afterburner pursuing high airspeed test points. However, portions of the coatings dis-bonded during flight, suspending further testing of the high airspeed portion of the envelope.


Mission Systems Assessment
• The program made limited progress in 2012 in fielding capability, despite relatively high sortie and test point completion rates.
-- Software delivery to flight test was behind schedule or not complete when delivered.

• Discoveries included:
-- The test team continued to work through technical problems with the helmet-mounted display system, which is deficient. The program was addressing five problems at the time of this report.

Jitter, caused by aircraft vibrations and exacerbated by aircraft buffet, makes the displayed information projected to the pilot hard to read and unusable under certain flight conditions. Night vision acuity is not meeting specification requirements. Latency of the projected imagery from the DAS is currently down to 133 milliseconds, below the human factors derived maximum of 150 milliseconds, but still requires additional testing to verify adequacy. Boresight alignment between the helmet and the aircraft is not consistent between aircraft and requires calibration for each pilot. Finally, a recently discovered technical problem referred to as “green glow” has been experienced when light from the cockpit avionics displays leaks into the helmet-mounted display and degrades visual acuity through the helmet visor under low ambient light conditions. The test team is planning additional, dedicated ground and flight testing to address these technical problems.

- Electronic warfare antenna performance of the first three production lots of aircraft was not meeting contract specification requirements.

-- Helmet-mounted display video imagery needed to successfully analyze and complete portions of the mission systems test plans cannot be reliably recorded on either the portable memory device or the data acquisition recording and telemetry pod.

• Discoveries from durability testing included significant findings in both the F-35A and F-35B ground test articles.

- In the F-35A, a crack was discovered on the right wing forward root rib at the lower flange (this is in addition to the crack found and reported in the FY11 Annual Report).

Also, a crack was found by inspection in the right hand engine thrust mount shear web in February. Testing was halted while the crack was inspected and analyzed, then restarted to complete subsequent blocks of testing.

- In the F-35B, the program halted testing in December 2012 after multiple cracks were found in a bulkhead flangeon the underside of the fuselage during the 7,000-hour inspection. Root cause analysis, correlation to previous model predictions, and corrective action planning were ongoing at the time of this report.

Other cracks were previously discovered in the B-model test article; one on the right side of the fuselage support frame in February and one at a wing pylon station in August, both of which were predicted by modeling. Another crack in the shear web tab that attaches to the support frame was discovered in March.

Also, excessive wear was found on the nose landing gear retractor actuator lugs and weapons bay door hinges. All of these discoveries will require mitigation plans and may include redesigning parts and additional weight.

• The results of findings from structural testing highlight the risks and costs of concurrent production with development.

- Aircraft availability rates for the F-35A varied from less than 5 percent to close to 60 percent in a given week from the first flights in March through October, with an average availability of less than 35 percent , meaning three of nine aircraft were available on average at any given time. For the F-35B, availability rates varied monthly as well from less than 5 percent to close to 50 percent, with similar average rates over the six months of flying.

Live Fire Test and Evaluation

One test in this series, LF-19D-27, demonstrated aircraft vulnerabilities to fires associated with leaks from the PAO system. The aircraft uses flammable PAO in the avionics coolant system, which has a large footprint on the F-35. The threat in this ballistic test ruptured the PAO pressure line in the area just below the cockpit, causing a sustained PAO‑based fire with a leak rate of 2.2 gallons per minute (gpm).

-- The program assessed that a similar event in flight would likely cause an immediate incapacitation and loss of the pilot and aircraft. The test article, like the production design, lacks a PAO shutoff system to mitigate this vulnerability.

-- In 2008, the JSF Executive Steering Board (JESB) directed the removal of PAO shutoff valves from the F-35 design to reduce the aircraft weight by 2 pounds. Given the damage observed in this test, the JESB directed the program to re-evaluate installing a PAO shutoff system through its engineering process based on a cost/benefit analysis and the design performance capabilities. The ballistic test results defined the significance of this vulnerability. However, the test also showed that a shutoff system needs to outperform other fielded systems.


Issues Affecting Operational Suitability

• Overall suitability performance demonstrates the lack of maturity in the F-35 as a system in developmental testing and as a fielded system at the training center. (end of excerpt)


Click here for the F-35 section of the FY 2012 OT&E report, on the Battleland website.

_________________
Wir sind Österreicher. Was bedeutet, daß grundsätzliche Kurskorrekturen und deutliche Prioritätensetzungen nicht unsere Sache sind. Man ist froh, einigermaßen über die Runden zu kommen und Probleme irgendwie auszusitzen. (Zitat v. Alfred Payrleitner)
Nach oben
Benutzer-Profile anzeigen Private Nachricht senden Website dieses Benutzers besuchen
Flanker27
ist immer hier
ist immer hier


Anmeldungsdatum: 29.01.2012
Beiträge: 317

BeitragVerfasst am: Mi Jan 16, 2013 00:19:57 
Titel:
Antworten mit Zitat

Die Beschleunigung sieht bei der F-35C aber ganz übel aus. Inwiefern kann man da noch von einem überschallschnellen Fighter sprechen? Embarassed

Und auf was bezieht sich die turn performance? Nachbrenner und 15.000ft? Wäre auch nicht gerade berauschend...
Nach oben
Benutzer-Profile anzeigen Private Nachricht senden
Beiträge der letzten Zeit anzeigen:    Seite 15 von 17       Gehe zu Seite Zurück  1, 2, 3 ... 14, 15, 16, 17  Weiter
Dieses Thema ist gesperrt, du kannst keine Beiträge editieren oder beantworten.
Gehe zu:  
Du kannst keine Beiträge in dieses Forum schreiben.
Du kannst auf Beiträge in diesem Forum nicht antworten.
Du kannst deine Beiträge in diesem Forum nicht bearbeiten.
Du kannst deine Beiträge in diesem Forum nicht löschen.
Du kannst an Umfragen in diesem Forum nicht mitmachen.



Powered by phpBB © 2001, 2002 phpBB Group