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garryA

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  • in reply to: If you had to choose between Rafale or F-35 #2141820
    garryA
    Participant

    [ATTACH=CONFIG]248182[/ATTACH]
    . If he is too lazy to find that from AWST , or that https://www.flightglobal.com/news/articles/combat-ready-53125/ , or that… http://www.senat.fr/rap/a13-158-8/a13-158-814.html, or that… http://www.defesanet.com.br/rafale/noticia/10893/Shooting-Down-an-Aggressor-on-My-Six–Vive-la-difference-/ or those…

    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

    Really? I’m not like you. But here are some descriptions of how the FCS work, and examples from the Rafale test on FCS control laws. Hopefully I’m not wasting my time explaining this.

    This is why these new digital FCS are considered carefree handling. The system limits pitch, yaw, and roll within the load factors and departure limits. The allowable limits are based on configuration (AtA, AtG), loads (CG), or asymmetric loads. The control laws can limit pitch, roll, the allowable AoA, and keeping the g’s (sometimes because of AoA limit) within the safety margins. Changes in the aircraft’s CG (based on loadout) affect the maneuver envelope of the aircraft to prevent loss of stability or overstress.
    This is an overview of the development of Digital FCS

    http://www.dtic.mil/get-tr-doc/pdf?AD=ADA398738
    (you may have to cut and paste this)

    Now as far as control limits- the system on the Rafale (like all DFCS). The CAT III limiter on the F-16, when on it limits the pitch onset, roll, and the AoA (effectively limiting G at higher speeds) The Rafale has a similar stores settings for air to ground configurations limiting it to 5.5 G. That does not mean that the Rafale can reach that max allowable 5.5G based on the loads.
    In the piece Hopsalot posted you can see several examples of how the FCS limits the envelope based on the load: https://www.flightglobal.com/news/articles/combat-ready-53125/
    Read: Slamming the throttle to maximum reheat and rolling quickly into a full stick-back hard turn to simulate a break away from a threat gave a rapid response, automatically limited initially to 18.8º alpha and 4g. As the turn progressed, the FCS allowed the incidence to increase to 19.2¼ alpha as the airspeed decayed.

    Here the FCS limited the aircraft AoA to 18.8 keeping the rafale under control limit. As you read on you will see the FCS allow more AoA and G:
    Once level, it was accelerated to M0.88 for a hard turn using full reheat to the FCS g limit. Although I entered the turn quickly, the voice warning (female) informed me that I had slightly exceeded the configuration limit of M0.9 (it was M0.91). The FCS limited the aircraft to 5.2g.
    at 330kt, the FCS transitioned from the g to the alpha limit of 20.8º, an incidence that was maintained until I rolled out at 200kt. Finally, to give the FCS a further hard test, I made full-stick rapid rolls with the stick held fully back. At the incidence limit, the aircraft took 6s for a 360º roll and 5.5s at the g limit of 5.4g.

    In the two above pieces, the FCS limited the aircraft to 5.2g. In the lower part you see, as speed decreased the limiting factor was not G but the AoA. The FCS allowed the aircraft to reach 5.4g at the lower speed.
    Lastly, the FCS does not just limit “g” nor is the configuration limit of 5.5g allowable at all speeds and loads:
    Four full-stick rapid rolls through 360º were made at 1g and 2g at 300kt. The roll acceleration was good and, in each case, the roll was completed in 3.5-4s. The peak roll rate was about 150º/s. Without the heavy external stores, the FCS would have allowed a higher roll rate of 250-270º/s. The aircraft was inverted briefly in level flight – something only a test pilot would attempt with two large cruise missiles and three external tanks on board – and remained easy to fly accurately. The FCS limits negative g as well as positive g, although I did not bring in the g limiter during this test point.

    https://www.dropbox.com/s/dv8sr9dudblqq7j/12918_resize_800_600_false_true_null.jpg?dl=0 and https://www.dropbox.com/s/iqkar66xwfggyl7/12920_resize_620_380_true_false_null.jpg?dl=0

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

    ” Rafale achieves 1.090 km combat radius in low-level penetration w/ 12×250 kg bombs, 4 MICA, 3×380 US gal tanks”
    there no source for that number , and not even F-15E or F-111 fly that far with that kind of load out , heck according to Dassault a Rafale with 3 2000L external fuel tank and no bomb, fly at hi-hi profile can barely reach 1700 km radius , with 6 AASM still in hi-hi profile , combat radius already reduced to 1389 km , but some how with 12 250 kg bombs, low altitude the Rafale can suddently reach combat radius of 1090 km ? how ? it can some how break physics now ?

    .

    . I ONLY GAVE HINTS SO AS WHERE TO FIND RELEVANT AND VERIFIED INFO.

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

    .

    So someone explaining that when a heavy point is used the FCS limits to 5g Rafale and trying to be taken seriously? FCS is constantly automatically updated considering present loads. And in heaviest config, limit is 5.5g.

    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 .

    Btw Rafale structural limit was tested up to 17 or 18g. THIS IS an assertion…

    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

    in reply to: If you had to choose between Rafale or F-35 #2142004
    garryA
    Participant

    bla bla bla

    Just because you call me a troll doesn’t mean people will see me as a troll.Let readers themselves decide who looks more like a troll to them.The one who back up his claims with evidence or the one who always pretend to be mysterious while show nothing of content.

    in reply to: If you had to choose between Rafale or F-35 #2142038
    garryA
    Participant

    You SAID that it’s BS, you didn’t prove anything.

    I did, and if you spend at least a second to look through the link i posted in last page, the whole explanation is there, you claim that i refused to look at the source but you are the one who didn’t look at the source, even though it is a specific topic, not a general forum like the one provided by Halloween
    here are my post, and some posts of others from last thread about BS claims from Picard
    http://forum.keypublishing.com/showthread.php?137788-F-35-News-and-discussion-(2016)-take-III/page29

    Let start with Picard shall we
    https://defenseissues.wordpress.com/2014/04/26/why-red-flag-exercises-are-not-indicative-of-aircraft-performance/
    ”Taking into account cost and sortie rate, 12 F-22 would be expected to face 102 F-16Cs
    do i have to explain why this is ridiculous ?
    https://defenseissues.wordpress.com/2015/09/11/dassault-rafale-vs-f-35/comment-page-1/#comments
    ” Rafale achieves 1.090 km combat radius in low-level penetration w/ 12×250 kg bombs, 4 MICA, 3×380 US gal tanks
    there no source for that number , and not even F-15E or F-111 fly that far with that kind of load out , heck according to Dassault a Rafale with 3 2000L external fuel tank and no bomb, fly at hi-hi profile can barely reach 1700 km radius , with 6 AASM still in hi-hi profile , combat radius already reduced to 1389 km , but some how with 12 250 kg bombs, low altitude the Rafale can suddently reach combat radius of 1090 km ? how ? it can some how break physics now ?

    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
    another great invention from Picard , did you read that 2 SCALP , 3* 2000 L fuel tank , and the Rafale can somehow sustain 6 g clearly the aircraft have some anti gravity device , and ofcourse he provide no source ( obviously because the source doesnot exist )

    Dassault Rafale has corner speed of 330 kts for 11 g instantaneous turn, and 360 kts for 9 g sustained turn. This gives it instantaneous turn rate of 36,4 deg/s and sustained turn rate of 27,3 deg/s. Sustained turn rate is achieved at >25.000 ft.”
    This is more complex to an untrained eyes so i will explain it with more detail :
    basic aerodynamic 101 :
    Lift = CL * ( v^2 ) * d * A * 0.5
    air density at 25k feet is 0.548981519715 kg/m3
    Velocity as he said is 360kts or 185 meter/second
    wing area of Rafale is 45.7 m2
    CL = lift coefficient
    to pull a certain amount of g , then lift must be equal weight * g-load ( mass*9.81*9 )

    so to pull ( not even sustain ) 9g at 185 meter/second , 25k feet , the aircraft must generate amount of lift equal :
    (9,850 + 4,700 ) *9.81*9
    to generate that much lift , CL = { (9850 + 4700 ) *9.81 *9 }/ { 0.5* 0.548* ( 185^2 )* 45.7 }
    CL= 3
    have you read that carefully ? CL= 3 , even transport aircraft with subsonic airfoil and full flap deploy at landing doesnot achieve that value , what the heck does Rafale wing made of ? magic dust ? ( and dont even bother to take body lift as an argument because it already included in CL value ) and you should remember that he said it a sustain turn too , so unless Rafale’s engine somehow magically lose no thrust at high altitude ( which is not possible because jet engine need air ), even if it’s wing can generate such lift , it wont be able to sustain such turn
    https://defenseissues.wordpress.com/2015/11/11/dassault-rafale-vs-f-22/
    top speed limit is caused by air intake design, leaving excess thrust for maneuvering even at maximum speed
    clearly he dont understand a thing about engine or air intake

    Need i say more ? these are the most obvious example , i wont even go further about these nonsense he talked about the F-35 or Radar warning receive or the fact that he just pull number out of no where for every single things he said ( like literally he made up every number just to fit his agenda ) , and that is just 3 articles alone, it not for no reason that people consider him a joke.

    You really don’t make much sense. Firstly, how can I disprove Picard578’s figures when he provided no proof for his figures in the first place? He listed off arbitrary performance numbers without providing any sources. And how does this relate to the F-35? You’re the one who used Picard578’s blog as a source in the first place, and you’re blatantly ignoring or dismissing our reasons for questioning his credibility. On the other hand you seem to readily dismiss any positive news about the F-35 as paid comments. You don’t see the hypocrisy? If you insist on making blanket assumptions about news regarding the F-35 without any regard for the credibility of the source beyond “if it’s positive then it’s paid for by LM” then I don’t know what to say. It’s like talking to a creationist.

    :

    Picard has no sources. Nobody needs to prove him wrong. If he can’t support it then it isn’t our job to disprove it.

    Even so…

    With regard to this claim of his:
    “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.”

    Official information :
    “The test configuration included three 2,000litre (530USgal) fuel tanks, two SCALP cruise missiles weighing 1,300kg (2,860lb) each and four Mica fire-and-forget air-to-air missiles. For a small aircraft such as the Rafale, this is a heavy load – but one that promises to allow a thorough evaluation of the aircraft’s flight control system and performance.

    At top of climb, the autopilot levelled the aircraft smoothly at the pre-set altitude of 25,000ft. Visibility through the canopy across southern France was superb. The canopy is covered by a gold film to make it opaque to radar energy (and thereby reduce the aircraft’s radar signature). This coating gave the effect of looking at the world through pale sunglasses.

    At a typical cruise speed of M0.82/347kt, the aircraft could sustain a 60º banked turn at maximum dry power. Slamming the throttle to maximum reheat and rolling quickly into a full stick-back hard turn to simulate a break away from a threat gave a rapid response, automatically limited initially to 18.8º alpha and 4g. As the turn progressed, the FCS allowed the incidence to increase to 19.2¼ alpha as the airspeed decayed. Again, I was impressed with how easy it was to extract the maximum performance from this heavily loaded aircraft.

    https://www.flightglobal.com/news/articles/combat-ready-53125/

    So here we see conclusively that a Rafale with the exact same load, was not only limited to a 4G turn by the flight control system, but even then the airspeed was decaying proving beyond a doubt that a 4G turn was not a “sustained” turn.

    We could go on forever, but of course that is what you would like isn’t it? Anything to try to distract from the many many credible positive reports that have been coming out about the F-35. Much better to cite the sourceless wordpress blog of some French fanboy. :highly_amused:

    No Msphere, your absolutely wrong. You don’t need to have the Rafale’s “envelope map”. The Rafale is limited to 5.5 g with heavy stores are fitted to the AtG stations. The aircraft, like all modern fighters with an advanced FCS, constantly adjusts available g and AoA to the weight of the aircraft. So once the 2000L tanks are fitted, the aircraft is limited to 5.5g max, and goes down from there based on weight. The idea of carefree handling allows the pilot to use full control imput without worrying about “breaking: the aircraft. Ex. full lateral stick input will give max roll rate at a particular weight. These FCS are more advanced that the F-16 CAT I/III limiters.

    Most anyone with a conception of aircraft design and flight control grasps that, you and Picard seemingly do not. BTW, he was on here before, and could not defend his blog posts to the forum as they were, as people have said, fiction. You can go ahead support the postings on that particular blog, no one has to provide you with evidence. Most of us know better, because we have a basis of understanding on which to discard his conclusions.

    Really? I’m not like you. But here are some descriptions of how the FCS work, and examples from the Rafale test on FCS control laws. Hopefully I’m not wasting my time explaining this.

    This is why these new digital FCS are considered carefree handling. The system limits pitch, yaw, and roll within the load factors and departure limits. The allowable limits are based on configuration (AtA, AtG), loads (CG), or asymmetric loads. The control laws can limit pitch, roll, the allowable AoA, and keeping the g’s (sometimes because of AoA limit) within the safety margins. Changes in the aircraft’s CG (based on loadout) affect the maneuver envelope of the aircraft to prevent loss of stability or overstress.
    This is an overview of the development of Digital FCS

    http://www.dtic.mil/get-tr-doc/pdf?AD=ADA398738
    (you may have to cut and paste this)

    Now as far as control limits- the system on the Rafale (like all DFCS). The CAT III limiter on the F-16, when on it limits the pitch onset, roll, and the AoA (effectively limiting G at higher speeds) The Rafale has a similar stores settings for air to ground configurations limiting it to 5.5 G. That does not mean that the Rafale can reach that max allowable 5.5G based on the loads.
    In the piece Hopsalot posted you can see several examples of how the FCS limits the envelope based on the load: https://www.flightglobal.com/news/articles/combat-ready-53125/
    Read: Slamming the throttle to maximum reheat and rolling quickly into a full stick-back hard turn to simulate a break away from a threat gave a rapid response, automatically limited initially to 18.8º alpha and 4g. As the turn progressed, the FCS allowed the incidence to increase to 19.2¼ alpha as the airspeed decayed.

    Here the FCS limited the aircraft AoA to 18.8 keeping the rafale under control limit. As you read on you will see the FCS allow more AoA and G:
    Once level, it was accelerated to M0.88 for a hard turn using full reheat to the FCS g limit. Although I entered the turn quickly, the voice warning (female) informed me that I had slightly exceeded the configuration limit of M0.9 (it was M0.91). The FCS limited the aircraft to 5.2g.
    at 330kt, the FCS transitioned from the g to the alpha limit of 20.8º, an incidence that was maintained until I rolled out at 200kt. Finally, to give the FCS a further hard test, I made full-stick rapid rolls with the stick held fully back. At the incidence limit, the aircraft took 6s for a 360º roll and 5.5s at the g limit of 5.4g.

    In the two above pieces, the FCS limited the aircraft to 5.2g. In the lower part you see, as speed decreased the limiting factor was not G but the AoA. The FCS allowed the aircraft to reach 5.4g at the lower speed.
    Lastly, the FCS does not just limit “g” nor is the configuration limit of 5.5g allowable at all speeds and loads:
    Four full-stick rapid rolls through 360º were made at 1g and 2g at 300kt. The roll acceleration was good and, in each case, the roll was completed in 3.5-4s. The peak roll rate was about 150º/s. Without the heavy external stores, the FCS would have allowed a higher roll rate of 250-270º/s. The aircraft was inverted briefly in level flight – something only a test pilot would attempt with two large cruise missiles and three external tanks on board – and remained easy to fly accurately. The FCS limits negative g as well as positive g, although I did not bring in the g limiter during this test point.

    You are confusing between “available” G and structure G limit
    Available G = how much lift can the wing and body of the aircraft generated , it depending on AoA, weight, and airspeed
    Structure G limit refers to structural g limit , the FCS of Rafale need to put a limit of 5 G when weapon are carried on heavy A-G station because otherwise the wing will fall of when aircraft turning too hard .
    Now you can argue that the pilot can override the FCS ( or for some reason the FCS shut down and let the pilot do what ever he want ) , and then he can fly the Rafale at maximum speed to generate enough lift for 5,5-6 g sustained turn with 3×2.000 l external fuel tanks, 4 air-to-air missiles and 2 SCALP cruise missiles , and we ignore the structure limit ,there are still several problems:
    1) the Rafale wont be able to fly much faster than mach 0.8 with 3×2.000 l external fuel tanks, 4 air-to-air missiles and 2 SCALP cruise missiles, the drag in that configuration would be enomours
    2) Turn rate is affected by speed , so while 5G turn at mach 0.8 is still decent , a 5G turn at mach 1.8 is almost like not turnning ( as the turn rate reduced to 1-2 degrees/second)
    3)instantaneous turn rate is different from sustained turn rate , while going faster can help improve instantaneous turn rate because more lift will be available through speed, it a different story with sustained turn rate , because in a sustain turn the engine have to overcome drag to maintain speed of aircraft , and as you go faster there will be more drag.
    4)Last but not least , 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 .

    I will take this at face value and assume you are actually trying here.

    A max instantaneous turn is the maximum g turn that an aircraft can achieve (typically limited by lift/mass) or that is allowable (structural or flight control limited). An aircraft performing a max instantaneous turn will typically be bleeding energy, either losing speed or altitude, but there are some specific cases, typically when the limiting factor is structural that the aircraft might not be losing energy.

    A “doghouse plot” is an expression of a fighter’s instantaneous turn performance. The peak of the plot represents the fighter’s maximum achievable turn rate under the conditions of the plot, it is the lowest speed where the fighter is capable of achieving its structural load limit. To the right of the peak (faster) the limiting factor is loads, and to the left (slower) the limiting factor is lift.

    Just because a fighter is hypothetically capable of achieving 9gs at a certain altitude does not mean it can do so at all speeds, only if it is at or above its corner speed.

    [ATTACH=CONFIG]245045[/ATTACH]

    Here you can see a pair of overlaid doghouse plots, one for an aircraft with slightly higher maximum speed and G-load performance and another for an aircraft with a lower g-limit, but a lower corner velocity as well, which allows a greater peak turn rate despite its lower g limit. (the blue aircraft here would be the more F-16-like, the multi-colored aircraft would be more F-18-like) This is why if you look at the corner velocity requirement for the F-35 the threshold was listed as F-16, and the objective was listed as F-18… all else held equal a lower corner velocity is an advantage.

    The F-35 and Rafale have the same structural max-G, 9gs. Both aircraft can presumably exceed that structural limit under certain circumstances without encountering a catastrophic failure (the Rafale has demonstrated this in air show routines, and the F-35 has been tested to at least 9.9g) but in normal operation 9gs is the limit.

    If the Rafale is carrying heavy air to ground stores, it is limited to .9 mach and 5.5gs, but the limit could actually be lower depending on the aircraft’s weight, etc. (as illustrated in the article where the FCS limited the reporter to 4gs.)

    The F-35 also presumable has limits when heavily loaded but they aren’t public so far as I know.

    Now, shifting gears completely…

    A sustained turn is a turn during which an aircraft either retains or gains energy (speed/altitude). A maximum sustained turn is the hardest turn a fighter can maintain without losing energy. This is a totally different metric than a max instantaneous turn in almost all cases. Like an instantaneous turn, it is dependent on speed, altitude, and the aircraft’s load.

    Just because an F-35 can sustain 5gs at some speed/altitude doesn’t mean it can’t also achieve 9gs in an instantaneous turn. (in almost all cases an aircraft can achieve higher loads in an instantaneous turn than a sustained turn)

    At sea level and while lightly loaded most fighters can actually sustain a 9g turn… but that falls away as you climb. You can’t compare a sustained turn at one speed/altitude to an instantaneous or sustained turn at another speed/altitude.

    2. Why is the F-35 limited to 4.6g sustained, even when clean?

    It just depends on flight conditions. At high enough altitude a fighter’s sustained turn capability will drop to 0gs. (all lift needed to maintain altitude) This same fighter might sustain 9gs near sea level. Without knowing the specifics of what that 4.6 (actually more like ~5gs) refers to we really don’t know much. The F-35 won’t be a strong performer relative to other fighters in sustained turning performance as the F-16 was, but then neither was the F-18 or Mirage 2000 and nobody doubts that they are fighters.

    in reply to: If you had to choose between Rafale or F-35 #2142192
    garryA
    Participant

    Why are you asking Halloweene to provide figures to prove/disprove a quote from Y20-BACON quoting PICARDS’s blog that YOU claim are false?

    Nic

    So here is the order : Picard put some made up figures on his blog => Y-20 quote Picard blog => I prove that it is BS => Halloween said these figures can be found on defesanet but give no actual links => i cant find anything that supports Picard claims
    I simply state the facts that Halloween always pretend to be mysterious when asked for evidence

    in reply to: The PAK-FA News, Pics & Debate Thread XXV #2142275
    garryA
    Participant

    Jo is a well known schizophrenic who sees a bunch of made up things that don’t exist, and post a million different documents he doesn’t understand, thats why most of the russians laugh at him like JSR and KGB

    there are no s-ducts on there. its straight through

    To be fair, while most of the time Jo is very angry and arrogant, I think he still much better than JSR, his posts have contents in them while talking to JSR is like talking to a wall

    in reply to: If you had to choose between Rafale or F-35 #2142283
    garryA
    Participant

    (i) i’m not croatian so i can’t be picard. Do your homework, cjheck figures on defesanet,i do not have enough available time to chew your job. Did you see me claim Picard’s figure were the right ones? Sry i only said you could find them from Vianney’s articles on defesanet. Now move ur a.. and for once try to find a reference when tools are given to you.

    What make you think i haven’t checked these numbers ?, there is nothing support his physics defying claims
    Btw, this is not defense india forum, so putting up some acnonyms and pretending to be mystery is not enough, most Keypub members are smart enough to see right through that BS, so if you want people to believe your claims, you better back it up with evidences ( real one not made up figures)

    in reply to: If you had to choose between Rafale or F-35 #2142632
    garryA
    Participant

    Do you really need to ask? Picard made it up. On the last claim: first, the g-demand system limits the Rafale to 5.5g 20′ AoA in ST1 or ST2 carrying heavy loads. The heavier the load, the g demand system will only allow so much AoA or available g. That, besides the fact that Picard’s claim is laughable on the face of it when compared to known aircraft performance while carrying such a heavy load out.

    I know it is laughable, but i want to see how far would he go, trying to justify his made up figures

    in reply to: ECM pod can reduce RCS? #2143846
    garryA
    Participant

    Our technical director, Mr. Loesch spent some time in military electronics and being an aerospace enthusiast, he does follow the topic with enthusiasm.

    While wrestling with the problem how to remove the high noise present on the USB Bus for items powered from it (e.g. a USB DAC) without using traditional linear regulators he encountered articles claiming the active radar cancellation of the Thales SPECTRA system on the Rafale. This immediately made sense at the conceptual level.

    Linear regulators invariably place a series element in the power supply line and must lose some (often significant) voltage and power to allow them to operate. The resulting overheads and loss of performance caused by linear regulators severely limit their use where for example you wish to power a DAC Chip that requires 5V (+/-10%) from a USB Socket which provides 5V (+/-10%) of power. There is simply no overhead available with which to work

    A linear regulator is a system used to maintain a steady voltage. The resistance of the regulator varies in accordance with the load resulting in a constant output voltage. It continuously adjusting a voltage divider network to maintain a constant output voltage and continually dissipating the difference between the input and regulated voltages as waste heat.. A simple example of a voltage divider is two resistors connected in series, with the input voltage applied across the resistor pair and the output voltage emerging from the connection between them. That is not, in any ways, shape or forms similar to activate cancellation jamming principles, which is based on wave destructive interference.

    What next? are you gonna claim the suspension of vehicle is the same as active cancellation?

    sry i keep the rest for myself. Go figure.

    Dont pretend to be mysterious, you simply dont say the whole thing because you scared that it would be wrong and it would shows people that you dont even understand the principles, better say only a part of it and tell people to figure out themselves so that if they debunk it again you can blame it on their interpretation

    in reply to: If you had to choose between Rafale or F-35 #2143875
    garryA
    Participant

    About range, configuration and flight profile, infos are available on Defesanet, given by a test pilot (JR Vianney Riller) who flew it for two complete weeks (one in Istres and one in St Dizier). About the sustained turning rate, there is an old test from Mike Yeoh i think, giving interesting data. Whowever, it was not strictly speaking sustained turn rate as speed declined a bit (and i stand corrected about that on that very forum). Sry, i’m very far from home and my computer file, cant give proper infos and links.

    So you are picard?
    If yes then let’s make it simple, did Vianney Riller claim any of this

    Rafale achieves 1.090 km combat radius in low-level penetration w/ 12×250 kg bombs, 4 MICA, 3×380 US gal tanks,

    or this

    Dassault Rafale has corner speed of 330 kts for 11 g instantaneous turn, and 360 kts for 9 g sustained turn. This gives it instantaneous turn rate of 36,4 deg/s and sustained turn rate of 27,3 deg/s. Sustained turn rate is achieved at >25.000 ft.

    or this

    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

    I want a straight and direct answer

    in reply to: ECM pod can reduce RCS? #2143880
    garryA
    Participant

    In fact, the debunking WAS BSloudly claimed by sheer ignorant. Figure i was in contact with the company since… Why would i listen to idiots convinced that fibre optics are best audio cables? (generally speaking people who do not even know the wma standard used for their CD is a piece of crap and heavily downgraded from studio recordings (not to mention HOW it is downgraded…)

    I repeat things i’m sure about, with evidences in the desperate hope that some will listen instead of parroting their forum guru, whatever ignorant and arrogant he is.

    So where is your evidence? in exactly what way main noise cancellation in a cable similar to activate cancellation again radar system?
    All i see is you posting whatever has a word active cancellation next to it, and say that is the evidence. But i doubt that you understand how the system work at all.
    Now, i supposed that you didn’t lie and actually talked to the company then you should be able to answer this question by Sigma

    mains noise that is picked up by electronics and transmitted in wires/circuitry. Hardly the same as RF running through open air across a wide area.
    Mains noise is analogue, USB is digital, analogue components are automatically pre-cancelled by any DAC worth its salt, that’s the whole point of using digital in the first place. So this is reducing the amplitude of something that’s going to be ignored anyway? .

    So many questions here. It’s cleaning a USB line, only to output it on another USB line subject to the same interference? It’s measuring how much internal PC components are being affected by mains RF by it’s own power connection?

    in reply to: If you had to choose between Rafale or F-35 #2143995
    garryA
    Participant

    msphere has said a few times in the past, him and picard are the same

    You mean they are the same person?

    in reply to: If you had to choose between Rafale or F-35 #2143999
    garryA
    Participant

    That Picard guy has really bad reputation does he? , every where i go, i saw people making fun of him
    http://www.f-16.net/forum/viewtopic.php?t=27364

    Not exactly a surprise given the amount of nonsense “theory” and made up numbers (like 99% of his statistics) in all of his posts. Here are a few examples :

    F-35s EOTS may be capable of detecting aircraft at 160 km from the rear, compared to 130 km detection range of OSF, but since aircraft detected was low-flying F-16 in afterburner, it is hard to estimate wether it will be able to detect aircraft from that distance at higher altitudes if it does not engage afterburner

    There is no source for this 160 km numbers

    . Its radar is also optimized for air-to-ground work.

    No reason explaining why APG-81 is any more ground optimize than RBE-2

    Rafale’s primary air-to-air sensor is OSF optical sensor suite on top of the nose, and has 80/130 km

    No source

    However, data presentation is just as important as data collection when it comes to situational awareness. Rafale’s Human-Machine Interface is similar in concept to Gripen’s, being minimalistic so as to avoid potentially lethal data overload. On the other hand, F-35 presents huge quantity of information, typically in numerical form, which can easily overload the pilot. End result is that Rafale has significant advantage in situational awareness over the F-35.

    Do i have to explain why this is BS?

    When it comes to radar signature, whichever jet uses radar is going to be detected well beyond its own radar range and become a target; SPECTRA will give Rafale firing solution with 1* precision at 200 km

    He forgot to mention that getting firing solution again air targets using RWR is extremely hard https://basicsaboutaerodynamicsandavionics.wordpress.com/2016/03/02/rwresm-and-passive-geolocation/, secondly he also pulled the angular accuracy figure out of thin air. Moreover, 1 aircraft can transmit and share data with the rest, it not like we dont have data link

    Rafale will have RCS of 0,75-1,10 m2 with 6 missiles, while AN/APG-81 has 160 km range vs 1 m2 target. Thus F-35 will detect Rafale at 149-164 km. Tracking (attack) range will be 119-131 km without jamming, or 22-25 km with jamming

    Again, he pulled tracking range and burn through range out of thin air, no source or calculation

    RBE-2 AESA (which entered service in 2012) has 208 km range vs 5 m2 target, or 278 km when cued by SPECTRA

    needless to say, he made up numbers again

    Rafale’s OSF has range of 80 km vs subsonic head-on target at 20.000 ft. At 30.000 ft, range may be 80-90 km, which means that Rafale will be able to attack the F-35 from 65-70 km.

    He made up the part about subsonic head on target, moreover OSF need LRF to get firing solution so detection range is not the same as targeting range, generally LRF is limited to around 20-30 km

    In terms of IR signature, primary factors are size, speed and engine emissions. Rafale has two M88 engines producing a total of 9.953 kgf on dry thrust and 15.077 kgf thrust in reheat, compared to 12.700/19.512 kgf for the F135

    In term of engine, thrust and exhaust temperature are not proportional, the reason lie on the ways thrust are produced.
    let look at the general component of a turbofan engine first shall we ?https://basicsaboutaerodynamicsandavionics.files.wordpress.com/2016/03/z2.gif?w=1200
    The 2 main components that responsible for thrust are the fan and the combustor (aka the core ) . To put in layman term , the fan moves a big mass of air at low speed ( cold air ) , the core moves small mass of air at high speed ( hot air ) , to get to certain level of thrust, an engine can either has very big fan and small core ( good for TSFC and infrared signature ) or very big core and small fan (good for speed and altitude performance ) , the percentage of air that didnt pass through the core is called the bypass ratio. Generally, same amount of thrust, a high bypass engine will be cooler
    Secondly ,Picard also forget that jet engine are air breathing engine , what does that mean ? they need air to run , the more air the better , air density reduces along with altitude, so that why when you look at the thrust curve of engine they always reduce as the aircraft go higher. So a jet engine that can push out 190kN at sea level may be barely able to push out 20kN at 40 K feet. It kinda useless to compare them with sea level static thrust.

    Rafale M can cruise at Mach 1,4 with 6 missiles. Assuming that 30% of the onboard fuel (1.425 kg) is used for supercruise, Rafale will be able to cruise for 11 minutes (657 seconds). At 35.000 ft, this will allow it to cover 271,7 km (146,7 nm).

    He use TSFC to measure the distance here, however TSFC changes along with speed and altitude so he is wrong

    Rafale can supercruise even with external fuel tanks (cca Mach 1,2 with two tanks),

    official claim is that Rafale xan supercruise with fuel tank, the part about mach 1.2 and 2 tanks is added by Picard

    Dassault Rafale has corner speed of 330 kts for 11 g instantaneous turn, and 360 kts for 9 g sustained turn. This gives it instantaneous turn rate of 36,4 deg/s and sustained turn rate of 27,3 deg/s. Sustained turn rate is achieved at >25.000 ft.

    This is absolutely nonsense as discussed in the previous thread :
    http://forum.keypublishing.com/showthread.php?137788-F-35-News-and-discussion-(2016)-take-III/page29

    F-35 has corner speed of 370 kts for 9 g instantaneous turn

    We dont have EM graph for F-35 yet so he obviously made this up

    Rafale also has climb rate of 305 m/s compared to 259 m/s for F-35

    Climb rate of F-35 is still classified, and again climb rate change with altitude.

    When it comes to IR signature, Rafale’s smaller size, lower thrust and better thrust-to-drag ratio give it a major advantage over the F-35

    So he believes that Rafale will cruise at much faster speed than F-35 ( mach 1.4 vs mach 0.8) , but somehow it still has lower infrared signature? how?
    https://basicsaboutaerodynamicsandavionics.files.wordpress.com/2016/03/shockwave1.png?w=1200
    https://basicsaboutaerodynamicsandavionics.files.wordpress.com/2016/03/supersonic-and-ir-detection.png?w=1200

    While Rafale’s dash speed limit is caused by air intake design, F-35s speed limit is caused by thrust-to-drag ratio

    Again, this all base on his personal opinion, no source or calculation

    Neither has towed or disposable jammers, making them more vulnerable to home-on-jam mode of modern radar missiles; still, DRFM jamming means that it is not as much of a threat to Rafale as with most other modes of jamming. F-35 has to use its radar, giving up frequency agility,

    Let ignore ALE-70, ASQ-239, MALD-J.. etc

    Rafale achieves 1.090 km combat radius in low-level penetration w/ 12×250 kg bombs, 4 MICA, 3×380 US gal tanks,

    Absolute BS as previously discussed here :
    http://forum.keypublishing.com/showthread.php?137788-F-35-News-and-discussion-(2016)-take-III/page29

    . However, this is not exactly an apples-to-apples comparison, as F-35 only carries two bombs in its internal weapons bay

    Let ignore SDB I, II, Spice 250 and SPEAR

    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.

    Absolute BS as previously discussed here
    http://forum.keypublishing.com/showthread.php?137788-F-35-News-and-discussion-(2016)-take-III/page29

    in reply to: If you had to choose between Rafale or F-35 #2144080
    garryA
    Participant

    Ffs, people still quote that moron Picard?

    And i thought they actually learned something after this thread : http://forum.keypublishing.com/showthread.php?137788-F-35-News-and-discussion-(2016)-take-III/page29

    in reply to: If you had to choose between Rafale or F-35 #2144255
    garryA
    Participant

    F-35 obviously

    in reply to: ECM pod can reduce RCS? #2144918
    garryA
    Participant

    Not only recently. Pod “Carbone was very succesfully tested during MACE xxx exercise https://books.google.com/books?id=Y8kePYFK1L8C&pg=PA45&lpg=PA45&dq=pod+thal%C3%A8s+carbone&source=bl&ots=hOG9DHr8qa&sig=LAVNhXmQnDpmRTVpo172SCB0MjY&hl=fr&sa=X&ved=0ahUKEwjdnKn8s4rPAhXFVRoKHd6CA-IQ6AEIKzAC#v=onepage&q=pod%20thal%C3%A8s%20carbone&f=false

    Where does it said Carbone is active cancellation system?

    Not really. Active cancellation is used by a UK acoustics company for example in order to cancel electrical noise on USB cables (which is otherwise nearly impossible using linear systems that would require near as much energy as USB can power, if not more)

    Last time you posted that, it has been debunked as BS, i dont understand why you bothered to repeat the same thing again?
    http://forum.keypublishing.com/showthread.php?134900-Rafale-news-amp-discussion-part-XVI/page69

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