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JFrazier

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Viewing 15 posts - 91 through 105 (of 269 total)
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  • in reply to: F-22 Doing A Cobra Maneuver #2552232
    JFrazier
    Participant

    MiG, nothing is ever as simple as it seems. Supposedly 60% of the Raptor’s capabilities are still classified. It has technology and research that outpaces every fighter today especially in terms of electronics and stealth.

    djcross has a lot of experience those fields and I would love for you to try to dispute him.

    in reply to: F-22 Doing A Cobra Maneuver #2552324
    JFrazier
    Participant

    What a joke. Now MiG has moved onto stealth which he knows even less about than aerodynamics.

    in reply to: F-22 Doing A Cobra Maneuver #2553325
    JFrazier
    Participant

    Just more proof that MiG-23MLD doesn’t know what he’s talking about.

    in reply to: F-22 Doing A Cobra Maneuver #2553377
    JFrazier
    Participant

    MiG, you seem to be in denial that a stealthy aircraft can have better aerodynamics than a fighter designed more than 20 years ago.

    Guess what? It happened.

    in reply to: F-22 Doing A Cobra Maneuver #2553383
    JFrazier
    Participant

    Again, MLD you simplify complex things, showing that you do not know much about the design of the F-22.

    No there isn’t anything the F-22 can do that the Su-37 can’t and vice versa. That’s not the point. The point is that the F-22 combines the agility of the Flankers with supercruise and stealth. Period. If you do not understand that then there is no hope for you.

    The faceting on the F-117 is nowhere near the same as the stealth features employed on the F-22. The F-22’s stealth was designed with aerodynamic requirements involved. You cannot just simply say that the faceting makes it worse than the Flanker because you have no proof.

    The F-15 ACTIVE uses 3D nozzles similar to the OVT, not flattened nozzles. There is almost no aerodynamic relation between the F-15, F-117, and F-22.

    in reply to: F-22 Doing A Cobra Maneuver #2553408
    JFrazier
    Participant

    Remember the flattened nozzle helps the F-22 because the Russian MiG-29s and Su-27s rely also in IRST systems and are quit agile fighters so the F-22 needs to be quit stealthy to avoid a direct hit by a Air to Air missile cued by the IRST systems fitted on the MiG-29OBT or Su-35BM

    Well according to kilcoo, the Raptor’s nozzles do not have IR suppression. That is handled by the advanced materials and paint on the F-22.

    Even if they do use IRST systems, the Raptor would easily find them before they knew the Raptor was in the area.

    in reply to: F-22 Doing A Cobra Maneuver #2553411
    JFrazier
    Participant

    question wich aircraft will be more efective the F-22 using 2D thrust vectoring nozzles or the MiG-29OBT fitted with 3D vectoring nozzles?

    More effective in what? In general, the 3D TVC system allows for greater yaw inputs than 2D.

    You are creating an urban myth that the F-22 is so great because it is stealthy and has the best aerodynamics and thrust vectoring nozzles.

    Again, where did I say the Raptor has the best aerodynamics? I said that has more advanced concepts employed in its design than the Flanker and Fulcrum. Is there something wrong with having a stealthy but manueverable airframe? Obviously, the Raptor engineers had more than enough money and time to do it.

    How is it a myth that the Raptor is so great because of its stealth, speed, and manueverability? Those are it’s main selling points and it has met all of the requirements.

    in reply to: F-22 Doing A Cobra Maneuver #2553432
    JFrazier
    Participant

    You make a urban myth because the F-22 has different arragement and different type of thrust vectoring nozzles, see the nozzles of the MiG-29OBT

    I am guessing that you do not understand. I am not talking about nozzles. Those are not surfaces. I am talking about control surfaces such as ailerons, flaps, stabs, etc.

    I mean that the Raptor uses it’s tailplanes and wing control surfaces differently. For roll, the Raptor uses both the ailerons and flaps, along with the tailplanes. No other fighter does this. Also, look at the video above. The Raptor has one tailplane fully deflected at one point with the opposite one normal, all while the LEFs and wing surfaces moving to keep it stable. Again, you will not see the Fulcrum or FLanker do this.

    in reply to: F-22 Doing A Cobra Maneuver #2553453
    JFrazier
    Participant

    Please do not infer mirages and urban myths, look a Video of the Su-37 or MiG-29OBT. thrust vectoring usually works in conjuction with the aircraft surface planes, it works in the same way in Su-37 and in the F-22, it will be the same in the MiG-29OBT or in the F-16VISTA/MATV, the reason is thrust vectoring control have to work in conjunction with all the aircraft planes to get best results.

    What are you talking about? We already know that most all of the fighters with thrust vectoring use them in conjunction with control surfaces. What myths are you talking about?

    The difference with the Raptor is that it uses it’s control surfaces in all manuevers. Again, I have not seen a fighter use its control surfaces like the Raptor.

    The MiG 1.44 had more controls surfaces than even the F-22 and was suposed to be powered by engines with thrust vectoring nozzles, the MiG 1.44 or MFI have to use all its surface planes in sincrony with the thrust vectoring nozzles.

    OK but the MiG is not in production and really has nothing to do with this thread. I am sure that MiG probably had a very good design drawn up but we’ll never see it in action.

    in reply to: F-22 Doing A Cobra Maneuver #2553516
    JFrazier
    Participant

    The OVT has the controls all integrated as far as I was aware. The MiG 1.44/1.42 was the same. Dunno about the Rafale, EF2000, Su-33/Su-30/Su-35 etc etc, but I’d be shocked if it wasn’t the same. Its quite easy to do with the electronics.

    Basically, what I think what he was trying to say, is that the Raptor’s FBW is more advanced than the Flankers because of it’s more powerful computers and research time.

    I’ve noticed some funny things about the F-22 in some videos of it. When it is flying into high alpha the tailplanes look like they operate indpendently of each other. When it does the hover and pitches the nose down, one of the tailplanes will stay in the normal position, while the other is in full deflection. There is another when the F-22 is performing a Bell, going at around zero airspeed, and the pilot does a 180 before falling down. When he does the 180, only one tailplane is moving and other one stays completely still. I haven’t seen any other fighter do this.

    I’m wondering if the tailplanes help with the yaw motions on the Raptor. I can’t see it just using those rudders to achieve a 30deg/s yaw rate.

    Here’s a pic of the Raptor with those control surfaces moving everywhere.
    http://www.codeonemagazine.com/events/oct_00/images/oct00_events6.jpg

    in reply to: F-22 Doing A Cobra Maneuver #2553698
    JFrazier
    Participant

    No you are wrong the MiG-1.44 has a nose profiled to generate some lift, several books mentioned it, among them one by Yefim Gordon.

    I meant the lifting body in between the engines like the Tomcat, Flanker, and Fulcrum.

    The F-22 can no be compared to the Su-27 that has AoA limits 120 degrees without even thrust vectoring and the 360 degrees with thrust vectoring.

    Those are transient numbers. I’m talking about sustained AoA. Look at what Doggy posted earlier. The daytime limits of the Su-27 are around 30 degrees AoA sustained in normal operation.

    The MiG-29 is another example of how thrust vectoring improves AoA handling; the F-22 is not the perfect aircraft there are no such aircraft.

    I never said that it was perfect. I proved that the aerodynamics are much better than what you and Firebar are assuming. You have not provided any facts disputing the analysis by Vortex.

    any aircraft as Firebar said has advantages and disadvantages, the F-22 configuration is not perfect, faceting impacted in its aerodynamics, as a whole the aircraft is the best all around aircraft that combines stealth with high performance but it does not mean can not be surpassed by other aircraft in some areas

    I never said it couldn’t be surpassed in some areas. Again, you and Firebar are just making assumptions about the F-22. You have no basis in fact and you have shown that you do not know much about the Raptor airframe. I have proved that the Raptor’s aerodynamics are ahead of the competition as they should be considering the length and price of its development.

    You might have the idea the aircraft is perfect, it is the best compromised between agility and stealth that is true but it is not an aircraft that a MiG-29OBT can not be more agile if it is fitted with thrust vectoring.

    Huh?

    in reply to: F-22 Doing A Cobra Maneuver #2553958
    JFrazier
    Participant

    Yeah yeah everybody believe what he wants and is what he wants to hear and believe, however the Russians did not design the MiG-1.44 thinking in stealth, but thinking in supermanoevrability and supercruise as the main parameters ruling the design, the F-22 in the other hand was designed with stealth in mind not manoeuvrability and thrust vectoring was added as a remedy and cure to all the compromises stealth imposed over the airframe.

    You are clearly pulling these statements out of nowhere. The F-22 was designed to balance stealth, speed, and manueverability. TVC is used to improve low-speed performance and high-speed manueverability. It wasn’t meant to remedy anything. You have no basis for anything you just said about the F-22, just assumptions.

    The MiG-29OBT has been shown in air shows an has proved you it does not need F-22 aerodynamics to be agile, remove the thrust vectoring nozzles from the F-22 and i want to see if it is as agile as the Su-27 or MiG-29 without thrust vectoring nozzles, remember the basic design parameter ruling the MiG-29 was wing fuselage blending to increase the lifting area as much as posible

    The F-22 was designed to still be very agile even with the TVC disabled. It can still hold a sustained 60 degrees alpha without thrust vectoring. TVC just gets it there quicker. The MiG 1.44 and S-37 also did not use the “lifting area” you speak of. I guess they are behind too. Get real, there are different approaches to everything. :rolleyes:

    to the contrary the F-22 is a box and its diamond shape cross section is like the F-117 a stealth parameter, it is not like the wing fuselage blending found in the Su-27, that has the function of making the fuselage basicly another lifting area besides the wings or in few words an extension of the wing or a third wing 😉

    The diamond pofile of the Raptor’s nose acts as a virtual surface as Vortex already explained. The lifting surface of the Su-27 is nothing new, the F-14 had it before.

    The F-22 is not a lifting body shape either that generates lift similarly to a kite but a huge box with large wings and thrust vectoring

    You gotta be kidding me… :rolleyes:
    Again you are simplifying complex things that you obviously have no background in.

    in reply to: F-22 Doing A Cobra Maneuver #2554030
    JFrazier
    Participant

    That is laughable, except by the wing design that probably has taken supercruise into consideration all those statements are in direct contradiction with reality, one of the best fighters designed aerodynamically in Russia after the MiG-29 and Su-27 were the MiG-1.44 and S-37, both aircraft do not look like the F-22 at any point.

    So what if the Raptor doesn’t look like the S-37 and MiG 1.44! It has probably had more aerodynamic testing than both of them combined and more. You can’t just look at a plane and tell it’s aerodynamics. How do you know that the aerodynamics of the S-37 and MiG 1.44 are better than the Raptor? You have no proof whatsoever.

    Vortex has proven time and time again that he knows what he talking about. You however, have not.

    in reply to: Typhoon – Beauty or Beast? #2554099
    JFrazier
    Participant

    I like the Typhoon and Gripen but the Rafale takes the cake in terms of modern canard deltas.

    Not a big fan of the F-16XL.

    in reply to: F-22 Doing A Cobra Maneuver #2554150
    JFrazier
    Participant

    .
    All right. I can agree with that, but are you sure that the pilot who has done Cobra in F-22 is not best of the best in USAF service.
    We can not be sure yet that the F-22 is safe enough for regular average service pilots to perform Cobra.

    I don’t know where you’re getting this from. All the pilots do is pitch up at 250kts, hold the stick back until they reach the intended AoA, then pitch back down. The aircraft does not depart from flight, there is no danger for Raptor pilots, that is the meaning of carefree handling. They can practically try anything and the fighter will recover.

    One pilot even mentioned that they have every new pilot do this to get used to the Raptor’s pitch rate.

Viewing 15 posts - 91 through 105 (of 269 total)