dark light

halloweene

Forum Replies Created

Viewing 15 posts - 1,771 through 1,785 (of 4,136 total)
  • Author
    Posts
  • in reply to: If you had to choose between Rafale or F-35 #2137953
    halloweene
    Participant

    Thérèse is absolument nous official statementu about à radar 2 or Gan modules is there?

    in reply to: F-35 News and discussion (2016) take III #2138140
    halloweene
    Participant

    LFIRR would be similar to the Yakhont, Brahmos, ASMP or the US Navy’s ALVRJ etc. Essentially solid fueled booster and liquid fuel for the ramjet. A Solid fueled ducted rocket would be similar to the Meteor, or Cayote that uses solid fuel all around. Advantages of the former approach was the ability to throttle and thereby extend range, which VFDR also enables hence that capability in the Meteor and GQM-163.

    http://s17.postimg.org/6k3gtnrkv/Screen_Shot_2016_09_20_at_6_40_54_AM.png

    http://s22.postimg.org/bsnnb1yyp/hsad.png

    Given the HSAD demonstrations, and the ARC’s subsequent acquisition by Aerojet, there is a chance that Raytheon offer something that utilizes a solid IRR using the stack that was pursued for the earlier demonstrations. Challenges would be meeting the program milestone timeframes and staying on cost. Given they own the baseline AARGM – Orbital would naturally be in a much stronger position.

    See – https://www.scribd.com/document/324634615/US-Navy-Ramjet-Development

    Are you sure there is a solid fuel booster in ASMP-A?

    in reply to: F-35 News and discussion (2016) take III #2138143
    halloweene
    Participant

    it look so much ridiculous to sue a potential customer. It doesn’t presage anything good in Airbus backyard.

    Why doese that make me think about KC-46 biased (to be polite) selection?

    in reply to: F-35 News and discussion (2016) take III #2138148
    halloweene
    Participant

    No, it’s not up to the judges. It’s up to the buyer.
    You and I, we don’t have to go to court to buy a car, do we?
    We just buy what we think is best suitable for us.

    The Dutch btw had Rand Corp involved, to make sure the acquisition was transparent and honest by analysis.
    They already anticipated crap like this.

    Except that a state is not you and me, and public finances are subject to specific rules (and in northern Europe, these are VERY severe rules

    in reply to: If you had to choose between Rafale or F-35 #2139040
    halloweene
    Participant

    Alright, if you didn’t said i wrong or endorse Picard claim, then it is my fault for jumping to conclusion too quick here.

    K np, lets both cooldown, right?

    in reply to: F-35 News and discussion (2016) take III #2139536
    halloweene
    Participant

    15 F-35 Models Grounded Due to Wiring Issue:

    -WASHINGTON — The US Air Force has ordered the grounding of 13 F-35A models, as well as a pair of Norwegian F-35As, following the discovery of “peeling and crumbling” coolant tube insulation.

    The issue appears to have been with a supplier of coolant lines, which are installed in the wings of the jet. During a routine maintenance check, it was discovered that the insulation on the lines were in some cases decomposing, which left residue in the fuel itself, according to a release from the Norwegian government on the grounding.

    The issue has been traced back to the insulated coolant tubes manufactured by one particular provider that have only been installed in the wing fuel tanks of the 15 aircraft — 10 from Hill Air Force Base, Utah, two US and two Norwegian F-35As at Luke AFB, Ariz., and one plane at Nellis AFB, Nev.

    The problem was first discovered this summer during depot maintenance of an F-35A being prepared for initial operational capability, Lockheed Martin spokesman Mike Rein said.

    After maintainers found three aircraft with crumbling coolant tubes, Lockheed conducted subsequent tests that “indicated it was possible for this crumbling insulation to become lodged in the siphon lines connecting wing and fuselage fuel tanks,” said US Air Force spokeswoman Ann Stefanek. “This could result in excessive negative pressures in the fuel tanks during flying operations or excessive positive pressures during air or ground refueling. In either case, the under- or over-pressure could cause structural damage to the fuel tanks.”

    Lockheed works with several suppliers that are responsible for manufacturing the coolant lines, but Rein declined to disclose which of its subcontractors had been responsible for the nonconforming part. The company plans to continue to work with that supplier in future F-35 lots, he said.

    “There has been no discussion about changing doing business with them,” he said.

    Stefanek said the Air Force ordered the temporary suspension of flight operations for those jets out of an “abundance of caution” regarding potential effects from the degraded insulation.

    “Although testing and simulation are ongoing, initial indications are that impacts are either minimal or can be mitigated. However, it is too early to outline specific issues that might arise,” she said. “Again, our primary concern is the safety of our pilots. This is a prudent precaution. Identifying and addressing issues is a standard part of the lifecycle of any of our aircraft.”

    The impact expands further than the operational F-35 inventory, as there are 42 aircraft currently on the production line that have received parts from the same provider. That includes three three Norwegian aircraft scheduled for delivery early next year. It is unclear if those parts will need to be replaced or if other nations planes will be impacted.

    According to an Air Force press release, engineers from the F-35 Joint Program Office, Lockheed AFB and have inspected eight aircraft and are working on a plan for mitigate issues connected with the pause in flight operations. The service expects a proposed mitigation strategy as early as next week, but even after a fix is identified, it could take “days to weeks” to repair each airplane, Stefanek said.

    Lockheed is developing potential fixes for the impacted jets that would allow them to return to flight as soon and as cheaply as possible, but Rein declined to comment on when the company would have a plan finalized. It is also working on a root cause analysis.

    The F-35 JPO stressed that the problem was caused by a manufacturing defect rather than a technical problem that would affect the aircraft’s performance.

    “The root cause of the problem was determined to be use of nonconforming material for the tubing insulation and improper manufacturing processes during fabrication of the cooling lines,” it said in a statement. “The non conforming material that was used is not compatible with fuel, causing degradation of the insulation and resulting in it falling off the tubing.”

    In a statement, Maj. Gen. Morten Klever, director of the Norwegian F-35 Program Office, emphasized that the issue was not a design flaw but instead was caused by a supplier using improper materials and techniques for the parts.

    “I expect Lockheed Martin to identify the appropriate measures to correct this issue, and that they implement these as quickly as possible,” Klever said.
    http://www.defensenews.com/articles/15-f-35-models-grounded-due-to-wiring-issue

    DEATH SPIRAL HAS BEGUN!! 😀

    Happens to every plane.

    in reply to: India: Rafale vs Pak-fa #2140091
    halloweene
    Participant

    Rafale is not in any way a stealth aircraft. Never been operational. And will never be. Some attempt did not meet designer/customer satisfaction or were discarded due to irrelevant cost at the time.
    Rafale has reduced frontal rcs (just like an f16 or a B1B and certainly less than a SH).

    To my knowledge, the Pi/2 inlets never reached an operational rcs reduction level and stand as a WiP.

    What Rafale has is a sophisticated integrated ecm suite (but loosing it’s uniqueness) and a world class hugging terrain software (depending on map availability).

    I won’t comment on RCS comparison with SH. Hugging terrain software isn’t anymore dependent on map as it is implemented on RBE2 AA. (radar followground). BTW, wouldn’t call Rafale air intakes Pi/2 as (i) they are less than 180° (ii) they are sort of “integrated” into the whole body. Last, angles aren’t allways the best solution vs radar, see B2 : no angles, but no constant curvature.

    in reply to: India: Rafale vs Pak-fa #2140126
    halloweene
    Participant

    No.

    No to Muslim and No to RCS

    Agree with no to muslim.

    in reply to: F-35 News and discussion (2016) take III #2141084
    halloweene
    Participant

    Boeing goes to the Tribunals in Denmark, i wouldnt be surprised if EADS do the same.

    https://www.flightglobal.com/news/articles/boeing-protests-denmarks-f-35a-decision-429397/

    Whatever is the issue, court conclusions will be interesting reading.

    in reply to: India: Rafale vs Pak-fa #2141095
    halloweene
    Participant

    India talks a lot about upgrading their Su30 into “super sukhoi”. Tbh, i think Pak Fa supercruise capabilities shouldn’t be dismissed, especially with their new engines coming. No clue.
    Mirage are being upgraded, so they will need replacement, but probably not before 15 years at least.
    About Mig 29, i guess IN is stick to keep them as they use former russian carrier.

    Future will tell (so many programs!)

    in reply to: Helicopter News & Discussion #2141692
    halloweene
    Participant

    Fingerpointing won’t help. Those in charge have to assume their responsibilities. Managing, providing services is not only to get a bigger check.

    Charging 500+M$ a year for putting 3 helicopter on average in the air should have ringed all the bell alarms at every level of the management chain. From tip to toes.

    C’mon Hallow, this is not supposed to be a sand pit contest.

    Absolutely. F-35 would win hands down 😉 (in terms of availability, delays and cost over runs). That’s why i am so relieved our tigers function properly. As you said, management chain should have ringed alarms. Including on aussie side. What is wrong with THEIR Tigers which isn’t with french ones?

    Btw, without ^pointing it would be interesting to have compared stats of the 4 built in Europe to the 18 built in Australia. And if those do not perform aswell, it could ALSO be the fault of Airbus Helicopters during ToT.

    in reply to: ECM pod can reduce RCS? #2141733
    halloweene
    Participant

    So i asked you

    not your mum, you can ask as much as you want, won’t bother me. No use acting like a 5 years kid asking for an ice cream.

    DAC chip

    Nope, try useful function “find” of your browser i quoted someone from iFi who used this acronym (personally i’m happy with the Digital to Analogic Converter chip of my Cayin N5 btw)

    Why dont you cite the part that prove your point that this system use the same principles as active cancellation

    . Gave multiple links, extracts, illustrations etc. From iFi. enuf. There is no worse blind than the one who do not want to see.

    Because generally, when you email a company, you will be email there sale board, marketing department.That how firms work, they want to sell their products,no point letting engineers talking directly to customers.

    Because GENERALLY things should happen the way you think they should, that is how they happened? Preclusion… Wellcome to Garry’s fantasy world. An information is a piece that confirms your presupposition, and the rest of course should be discarded as it doese not fit Garry’s world.
    Things should happen a certain way in your opinion, so they did happen that way … Omgz
    Btw when you try to give a lesson about aerodynamics basics, you would be nice to quote the person/site you copy/pasted…

    in reply to: If you had to choose between Rafale or F-35 #2141759
    halloweene
    Participant

    That article has been brought up in the link i posted, not once but many times, i even brought the quote here in the post right above yours. Here is an honorable mention

    No you are confusing with Mike Yeoh Flight global article FBW cited (not you) this one is from AWST, 1999, but nvm.

    in reply to: If you had to choose between Rafale or F-35 #2141762
    halloweene
    Participant

    So how can we be sure the twitter account belong to the real pilot?.There are many fake self-proclaimed experts on all military forums. So why twitter should be treated different. After all, it is not that hard to create a twitter or fb account.

    p/s : If i give you the benefit of the doubt and say you telling the truth aka that is a legit account. Finding references is still your job. If you claim that garry is wrong, then it is your job to back that up. If you fail to do that then your claim have no weight.

    I did not eve”n say he is wrong (won’t bother analyzing what he says to say so), i am just rid of constant attacks about things i would have claimed when i did not claim anything. After short research (google is my friend), i just found the links and posted them.

    in reply to: If you had to choose between Rafale or F-35 #2141765
    halloweene
    Participant

    So after all that screaming, crying , finger pointing, that the best you come up with? and you tell me that iam too lazy to read the links? did you read the link i gave at all?
    That article has been brought up in the link i posted, not once but many times, i even brought the quote here in the post right above yours. Here is an honorable mention

    Again, i already mentioned this as well, and i even brought the quote here

    .
    So you gave me hints where to find relevant information even though susch info were mentioned by me already?

    .
    The G limit by FCS is not, in any ways, shapes or forms similar to G limits due to lack of lift. To put it in simple term, when you put weapons on Rafale heavy AG station, the FCS limit the maximum G you allowed to pull from 9G down to 5.4G, and that limit will be there regardless of the altitude where Rafale flying at. But that does not mean the Rafale will generate enough lift to make such turn at all altitude. Why? because air density change with altitude.
    Lift = CL * ( v^2 ) * d * A * 0.5
    As the d factor change dramatically along with altitude
    http://www.aerospaceweb.org/question/atmosphere/density/density.jpg
    unless Rafale has a different way of generating lift ( namely anti gravity devices or magic) , it’s maximum g limit will not be the same 5.4G at all altitude.
    And it even more nonsense to say such limit is the sustain turn rate limit, because to have a sustain turn, not only the wing-body need to generate enough lift, the engine need to generate enough thrust to counter the drag too.
    Moreover, Picard exact statement was : ” In fact, Rafale can achieve 5,5-6 g sustained turn with 3×2.000 l external fuel tanks, 4 air-to-air missiles and 2 SCALP cruise missiles. F-35A can only sustain 4,6 g when in clean configuration.
    which mean he need to compare them in the same condition which is 15K feet , mach 0.8 . If he take the sustain turn performance of Rafale at sea level then compare it with the F-35 at 15K feet then he is even more of a moron because that would be similar to me compare the speed of the F-35 at 30K feet with speed of the Mig-25 at sea level then declare F-35 is a much faster aircraft .

    structure G limit isnot the same when different load are used, when the Rafale carry 3×2.000 l external fuel tanks, 4 air-to-air missiles and 2 SCALP cruise missiles, it won’t be able to turn as hard or roll as hard compare to when it is equipped with only 2 Mica

    Did i say ANYTHING opposed to that? Did i endorse Picard’s claims? I just gave a rough idea where to find sources so as to critically (in its scientific meaning) read article. Nothing more nothing less, still you keep flaming me for having claimed things I DID NOT SAY.

Viewing 15 posts - 1,771 through 1,785 (of 4,136 total)