MiG-29
Banned Idiot
Quite true Scratchman, and Col Max Moga, Owner/Operator of the last Raptor, ie squadron commander of the F-22's at Elemendor, "yes I know he's just a telephone Col.", long story I'd love to tell about my old man, but when he was the first Raptor demo pilot, said as much on the old "Airshow Buzz" forum. No "real Cobra", because it was/is tactically irrelevent, for the reasons you note, so mig don't try this in real life with a bogey on your tail, someone will "toast your buns" for you. And yes the Raptor will do a "real Cobra", just ain't gonna happen at an airshow, or in real A2A, and yes three d nozzles are "way more cool" than 2 d nozzles, but heavier and lots more complicated. I would love to know what entry speed is on Pugachev Cobe, guessing somewhere between 200 to 300 knots give or take 50 knots. And your right scratch, if you want to pick up speed you want to roll inverted and pull keeping positive g on you and the airframe, rather than pushing the stick forward and pulling neg g, assuming you have sufficient altitude.
You are a bright lad, and TVC is a game changer, esp at Mach 1.6+ in supercruise, can you say Lock On!
A couple of points, post stall is designed for air combat, and 3D nozzles are lighter than 2D nozzles.
Flight tests of thrust-vectoring designs began in the early 1990s with airplanes like NASA’s modified F/A-18 and F-15, the Rockwell/MBB X-31, and a modified Air Force F-16. In 1994, the X-31 demonstrator was fitted with what German program managers called a “poor man’s thrust vectoring nozzle”—three paddle-like vanes that pushed into the exhaust stream—and the results were spectacular. Without thrust vectoring, the X-31 lost twice as often as it won against the F/A-18 in mock combat; with it, the X-31 didn’t lose once in 129 matches.
See these are american-german studies see more and see PSM which means post stall maneuvre
Another demonstration of the advanced capability of
TV and PSM was observed when the X-31 was tested
against the F-18 in combat scenarios. X-31 is an experimental
aircraft being developed and tested jointly by the
U.S. and Germany [21]. The X-31 program is intended to
highlight the tactical utility of Extended Fighter Maneuverability
(EFM) at low cost [4]. It was observed that the
F-18 had a better success rate when the X-31 was own in
conventional configuration. However, when PSM was
enabled, X-31 emerged as the winner. TV
see PSM = Post Stall Maneuverability
3D nozzles are very light in fact they just add a few dozen kilos
see
Eurojet partner ITP of Spain is responsible for the design of the EJ200's TVN, and has attempted to optimise the device for simplicity of operation while adding as little weight as possible (about 40kg/88lb per engine).
The flat nozzle made of metal is heavier than the circular one by approximately half a tonne. Mind you, the whole AL-31FP fitted with its circular swivel nozzle weighs a little bit more than 1500 kg only. So, the use of a flat nozzle implies an extra tonne at the rear of a plane (two-engine are meant here, which make up the most of modern fighters
In the past, all jet aircraft to apply thrust vectoring have used mechanical thrust vectoring (MTV) techniques. This is done by mechanically deflecting the engine nozzle to direct the flow. Whilst effective, a MTV system is heavy and complex. The MTV nozzle on the F-22A Raptor (Fig. 2) weighs 30% of the total engine weight
So i will put it in context
A Su-35 versus J-10 is not going to be the same than a J-11B versus J-10 on a dogfight and yes post stalll is used in air combat
---------- Post added at 06:06 PM ---------- Previous post was at 05:56 PM ----------
Well, frankly I don't intent to downplay the benefits of TVC to agility in general and I agree with a lot of what you say. I see the point of TVC allowing to change direction (or trim the A/C) without the penalty of the added drag that comes from deflecting a control surface.
The single point that I criticise is that (to me at least it seems) these air-show style backflip maneuvers seem to be overhyped as game changers in air combat.
From a defensive position they really seem to be a last ditch maneuver. In the other example, i.e. at/after the merge when trying to get your nose onto the opponent again, I'm also not so sure really. All the time I see these stunts, it appears to me (although that's probably more guesswork) that the planes are moving rather slow anyway. I wonder if all that will be just as controlled when you arrive at the merge with 550-600kts and then do such a pull.
the advantages of post stall are well known specially in Germany and the US, one of the biggest fallacies that emerged about post stall was when an american F-15 pilot boasted it could kill raptors doing post stall after a redflag debriefing.
The reality was distorted, to start by american own reports say that F-22s have a kill ratio of 30:1
on their favour meaning F-22 usually defeat their F-15 agressors.
The chinese claimed the J-10 regularly kills Su-27s, meaning the Chinese fighter is superior to the flanker, however the flanker and fulcrum families have been upgraded with more powerful engines and TVC nozzles, so nowadays a Russian Flanker is far more advanced than the soviet Su-27s or J-11Bs and the likelyhood the J-10 will defeat the Su-35 are slim.
plus
The emergence of thrust vectoring has enabled significant improvements in combat aircraft performance. It has improved dog-fighting capability by allowing a condition known as super-manoeuvrability, where the conventional flight envelope is extended into the post-stall region. It has extended aircraft range by alleviating trim drag caused by elevator deflection (Mason 2002). It has reduced take-off distances by vectoring thrust downwards on rotation. Thrust vectoring can also be used to reduce the radar cross-section (RCS) of very low-observable aircraft by removing the need for conventional aerodynamic control surfaces (Gal-Or 1989). This concept was proposed for the conceptual X-44 MANTA (Multi-Axis No-Tail Aircraft) (Fig. 1), a long range bomber variant of the F-22 Raptor (Sweetman 2002). These factors combine to give thrust-vectored aircraft a significant tactical advantage.
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