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They're stumped is what is being said which is why both Pogosyin and Putin have said recently the engines are still a problem.Just because you said so ?
You mean to say those thousands of engineers at saturn and Salyut have been doing nothing but drinking vodka for the past 3 years ?
I agree, the influence of the Super Flanker is there. But when you make changes to an airframe with new designs you are not going to get the optimal performance. The Su-35 was designed to be the most manuverable fighter they could make. What was done to decrease the RCS will take its toll on the flight performance, particularly in the verticle axis.the influence of Su-35 is also evident in Pak fa , which is at the apex of maneuverability.influence is influence it doesn't define the total performance of an aircraft, every airframe is different and so is its performance.
YF-23 also had inferior yaw control to the F-22 which is I why I stated it couldn't flat turn like it. With such small verticals, there is nothing to aid the T-50 in yaw control except the TVC. The wide engine set detracts from the control it would have with a centreline set.The tailfins of YF-23 were called ruddervators , because they performed the function of both rudders and elevators , which means they couldn't perform as full fledged verticals , they had to sacrifice some of their rudder characterstics to work as elevators , which is not so in PAK FA the verticals act as dedicated rudders thus giving authority over yaw.
The two-dimensional nozzle vectors thrust 20 degrees up and down for improved aircraft agility. This vectoring increases the roll rate of the aircraft by 50 percent and has features that contribute to the aircraft stealth requirements.Thrust vectoring doesn't act in roll axis , it acts in pitch and yaw axis.
http://www.globalsecurity.org/military/systems/aircraft/f-22-f119.htm
I am telling you the wide engine set will make a TVC in the yaw axis less effective. With a centreline TVC engine set it is easy to flat turn the plane with thrust being generated in one central direction. With a wide set the thrust is dispersed and meets more resistance to the turn. It also requires a greater degree of vectoring to achieve the desired result.The thrust vectoring in horizontal plane is called Yaw Axis thrust vectoring . are you telling me yaw axis thrust vectoring has no control over yaw?
Let us try some basic physics shall we , if both nozzles move in left direction, in which direction will the nose of the aircraft move? in the right direction , that is yaw axis thrust vectoring in layman's terms for you.
again here is some more basic physics for you
Sure, you got it so well you don't know TVC works in the roll axis.moment of a force = force x distance between point of application of force and axis of rotation
in this case the axis of rotation is the vertical line passing through the centre of the fuselage, so the further the engines are placed the more the moment will be generated. get it?
It only generates significant lift if the vortex is allowed to expand across more surface area, such as the wing. That is why the ducts of modern fighters are drawn into the fuselage so they can get more lift and break less airflow for greater speed. The F-14 didn't generate significant lift in the centreline which is why it was used to house most of its ordinance load. The variable geometry of the wings allowed it to transition the needed lift in different flight regimes.Vortex generates lift , so in essence you are contradicting yourself,and as for the significance of the lift generated here are some figures for you
40% more wing area means 40 percent less wing loading.
You won't find movable LERX on the F-35 and F-22 because it increases RCS. It is just another compromise on stealth and maneuverability the Russians had to make. They wanted canards but it was too much surface area for a low RCS. They couldn't do away with it completely so they had to go with a mechanical LERX. Best compromise they could make IMO. It doesn't make it in the realm of F-22 or even in the control features of MKI's canards.Now you are just trying to derail the topic , first you brought the YF-23 into discussion , now you are trying to bring the su-34 into discussion , just to save your tail.The su 34 has LERX which gives it more maneuverability but it is also heavier , less aerodynamic , less powerful and without 3d tvc which hampers it's maneuverability . how the heck can you compare PAK FA to Su-34.
Yeah, high wingload decreases maneverability. Why don't you read the basics of the principle.With this one , you just crossed the realm of uninformed and entered into the realm of stupid.
1.lower wing loading means better takeoff and landing performance
2.lower wing loading means better climb rate
3.lower wing loading means better cruise performance
4.most importantly lower wing loading means higher sustained turn rates.
and not only Pak-fa has large wings it also has centerline tunnel both of which combine to give the PAK FA extremely low wingloading.
still laughing?
http://en.wikipedia.org/wiki/Wing_loading
I should start charging for lessons here at the École d'aviation.
So physical the Americans were able to break it with convergent flaps that didn't lose thrust and provided vectoring all in one design.Just another example of PHYSICAL limitation and not russian limitations , concealed engine means lesser thrust, Period.Heck Even the american's couldn't get comparable thrust that's why they ditched the YF-23 , moreover concealed engines means no TVC , this also is a physical limitation and not a russian limitation , that's why there aren't any concealed engines on the PAK FA cos russians put more importance on maneuverability.
More like failed..explained above.
IOC in 2015 is a pretty clear statement. You do realise IOC means the in service date and Kopp expects all these systems to be operational by 2015? He is going against not only common sense, but buying Russian propoganda even the Russian specialists at MDB and CSS don't believe.This is what kopp said for which you started criticising him
Even if PAK FA Reaches IOC in 2015 without UHF Aesa and with current engines , it will still leave legacy us fighters and F-35 irrelevant , what is the point of contention?
The 0.5m^2 figure didn't come off comments of a blog. It came from a popular published Indian periodical that has a reputation for " reliable reporting and responsible journalism."If you don't have the time then please don't use that 0.5 m^2 figure , because it is unsubstantiated.
Of course that is what Kopp is saying. All he cares about is predicting the doom and gloom with Russian superiority over the backwards Allied air forces. Simple fact is, we aren't worried about the resurgence of the VVS. We have already excepted the fact the US won't export F-22 and the F-35 won't be all it is said to be. This is why we have moved on to stealth UCAV development. The NEURON will have strike capabilities without risking our pilots and high survivability above even the JSF. The Meteor will give us air dominance over current and future threats. AESA development is expanding the reach and effectiveness of our radars. Time doesn't stand still in the West, that is something Kopp seems to forget. While he is busy predicting the end of our technological advantage, he conveniently overlooks the continuous setbacks of the Russian MIC. For 15 years, time stood still in the Russian defence sector. Now that they are trying to restore it after 15 years of decay, they are finding it is not so easy.Isn't this what kopp is saying , that america should start exporting F-22 and Allied Tacair should start updating , he hasn't said anything about your euro canards.