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JFrazier

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Viewing 15 posts - 121 through 135 (of 269 total)
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  • in reply to: F-22 Doing A Cobra Maneuver #2558390
    JFrazier
    Participant

    The 60 degrees sustained AoA is too much for F-22.

    Wow, you really can’t read can you?

    There are no public numbers on the Raptor’s transient AoA. From the video, in a normal service Raptor, the pilot was able to reach about 120 degrees AoA. It is not a test plane. This was at an airshow in a jet loaded with 8 missiles and almost full tanks.

    The Raptor has no problem reaching a sustained 60 degrees AoA. It has been that way since the YF-22.

    Raptor pilots say that they have no problem doing any of the post-stall manuevers of the Flanker series.

    in reply to: crackdown on F-22 demos/info? #2558707
    JFrazier
    Participant

    there goes that discussion , well atleast we’re better off then 16.net and didnt waste 3-4 pages of bandwith talking about something that didnt happen 😉

    Idesof just likes to jump to conclusions. He has no idea about what he’s talking about most of the time and gets angry whenever someone disagrees with him.

    I swear, I think he thinks that the F-22 and F-35 are gifts directly from God. :rolleyes:

    in reply to: F-22 Doing A Cobra Maneuver #2558782
    JFrazier
    Participant

    Regarding TVC, you must admit that Russians are a whole generation ahead in aircraft controllability techniques.
    The SU-37, with TVC, can do 360 degrees, a full circle around lateral axis, and it demonstrated this astounding maneuver in airshows.

    No they are not a whole generation ahead. The Raptor’s fly-by-wire system is far, far more advanced than of the any Flankers. I would say that the FBW system has even more to do with pointability than thrust vectoring.

    Doing a 360 around a lateral axis deos not mean it’s the ultimate, most manueverable jet. There is more to it than that. The Raptor will do a barrel roll at a sustained 60 degrees alpha. Something the Flanker cannot do.

    The Raptor is still the first fighter designed from the outset for thrust vectoring. Period.

    in reply to: crackdown on F-22 demos/info? #2558814
    JFrazier
    Participant

    do you still have that quote somewhere? I could swear you posted it here at one point but I’m not having any luck finding it.

    It’s in the Raptor supercruise thread.

    Personally, I don’t see the big deal either. Nothing about what he said really revealed anything new we thought about the Raptor, it just confirmed some suspicions. I doubt if any of it was classified either.

    in reply to: baby's crawling now!! #2560787
    JFrazier
    Participant

    Meh. I can wait.

    in reply to: Raptor for the USN? #2563293
    JFrazier
    Participant

    You can have a Navy fighter go to the Air Force but you can’t go other way around. The costs of stregthening the frame and preparing it for landing on a carrier would be very, very high.

    in reply to: F-22 Doing A Cobra Maneuver #2563444
    JFrazier
    Participant

    It is nothing special. With Thrust Vector Control it would be very unusual if it could not do it.

    But the point is:
    Is it able to do this maneuver with service aircraft, not only on tests ?

    Firebar, that was at an airshow in New Jersey with a production Langley jet.

    Before, you were saying that it couldn’t pass 60 degrees alpha and now you’re saying that it would be unusual if it couldn’t? :rolleyes:

    in reply to: F-22 supercruising at Mach 2? #2566636
    JFrazier
    Participant

    Well I’m not a raptor pilot so i really wont know but the pilots who fly it say that the best way is to go supersonic right of the deck , the metz comment regarding this is available on codeone (the article i have posted umpteen timeS) and frazier can link you the article regarding supersonic climb by dozer.

    Here ya go.

    “Sorry to bust the bubble on that one – but actually it can’t, kind of depends on fuel weight/altitude/speed, I’ll try to explain correctly & quickly (I’m not an engineer – if there’s a pratt&whitney rep that views this please feel free to correct me…). At slower speeds the engines are not putting out maximum thrust, the more air flow there is through the motors the more thrust you’re getting, so, for example, I did a takeoff where I was at about 570 knots at Edwards, I was prior to the end of the runway, not used to being that fast so I pulled up to 90 degrees nose high (single ship with my own tanker and first chance to try this with a Raptor so I decided to see what she’d do), and the mass flow at that point is close to producing max possible thrust, the a/c continued to accelerate in the climb to .99 mach passing about 20 thousand feet and then slowly began to decelerate – (unofficially according to the engineers I would have ended up around 65+ thousand feet on that day and broke every time to climb record we could think of for category & weight class — and oh by the way, that wasn’t a Streak Eagle or Flanker stripped down bare with weight removed, no external stores for combat configuration, etc., that was in a stock, off the line F-22, full of gas, combat configured with the internal weapons bay full – as an Eagle guy previous I was absolutely astonished, I hope someday we go after the official records because this jet will likely crush most of them. One last interesting point is that I did that going straight up after takeoff (that day I ended up blasting past my assigned altitude at Edwards of 29 thousand after takeoff, ended up at 31.5 AFTER a 5g pull to level out which at that weight and altitude should bleed energy fast but when I rolled out I was still at 330knots KCAS!!), but normally to get those altitudes they use a specific climb profile like the Streak Eagle did (I forget what it’s called) climb at .9m to the mid 30 thousands, push over to accelerate to supersonic and then finish the climb profile to bust the records from there).”

    He says more here:

    link

    in reply to: F-22 supercruising at Mach 2? #2566749
    JFrazier
    Participant

    The climb rate is always achieved were the balance of drag and speed is best. Maybe the F-22 can “go through Mach” earlier than others, which normally would do that at 20 to 30kft if clean, but accelerate to supersonic and then start climbing doesn’t seem very useful.

    They’ve flown the planes. We haven’t. I wouldn’t doubt that both pilots know what they’re talking about.

    in reply to: Super Hornet's Performance!? #2566803
    JFrazier
    Participant

    I would guess that the RoE have changed with new modern equipment such as the APG-79. The Raptor pretty much dispenses with BVR range RoE. I’m guessing that the new AESA radars have a pretty advanced target indentifcation system.

    The Super Hornet should have no problem against the Su-27 variants and the J-10 BVR. WVR, the SH should still be pretty good or at least better than the Tomcat.

    in reply to: F-22 supercruising at Mach 2? #2566806
    JFrazier
    Participant

    ohh yeah…. another f22 fanboys thread :rolleyes:

    Look who’s back.

    the famous M1.7 supercruiser was done in a special maneouvre (some kind of loop-dive), i dont know if with a dive, an a nice day you can beat M2…is possible, but very unprobable

    Ummm yeah, can you go ahead and find that for me. Loop-dive manuever? :rolleyes:

    the f22 WAS designed to sacrifice speed, to turn that speed into lift at supersonic, the speed limit isnt sooo related to the materials, or engine inlet or whatever, the basic concept of the raptor is that

    I don’t understand what you are saying in this paragraph.

    in fact a factor that is more important to me is the climb rate, still there isnt any climb record of the plane, with such huge engines, and all the new stuff, maybe engine overheating??? who knows

    Go read the threads about the Raptor while you were away. One pilot during a test flight pretty much broke all of the time-to-climb records for the Raptor’s weight class according to engineers. That was with a fully combat loaded plane. The Raptor has its best rate of climb straight off the deck unlike other fighters such as the P-42 and Streak Eagle.

    in reply to: F-22 supercruising at Mach 2? #2567157
    JFrazier
    Participant

    Rest of you said I have no attitude, but this. For what’s kind of reason given you lead to say F-22 has less drag than YF-22? What are they?
    The angle of F-22A’s swept is less than YF-22, only area of fin tail less than YF-22, so we can say logically, that F-22A has less weight than YF-22 but for drag is uncertain.

    You cannot measure drag by just two factors. While they increased wing angle, they probably changed the wing’s profile to compensate. Not to mention the numerous changes to the body.

    The engineers had about 6 years to go over the YF-22. The F-22 does everything better than the YF-22 as it has been refined to a much finer point.

    in reply to: F-22 supercruising at Mach 2? #2567195
    JFrazier
    Participant

    Yet, doesn’t the F-135 produce much more power?!?!?

    The F119 is most likely putting out around 39,000lbs at sea level. That’s only about 4,000 lb less than the F135. The difference is that the F119 produces much more thrust at high altitudes and speeds because of its low-bypass design. That’s where the money comes in.

    in reply to: F-22 supercruising at Mach 2? #2567228
    JFrazier
    Participant

    Yet, from what I’ve heard the F-119 and F-135 are not between the F-22 and F-35! :rolleyes:

    They were designed for two different mission so they have different features. The new engines are a lot more specialized than the older genration especially the F119’s. The F119 was pretty much designed for TVC from the outset.

    in reply to: F-22 supercruising at Mach 2? #2567248
    JFrazier
    Participant

    I just don’t see it happening. I’m one of the biggest supporters of the Raptor but this seems out of its range. If we were talking about a theoretical F-23 I might have a different opinion.

Viewing 15 posts - 121 through 135 (of 269 total)