Is The S-37 Fighter Up There With The F-22 ?!?!, page 1
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reply posted on 10-10-2004 @ 03:11 AM by E_T
Originally posted by sminkeypinkey
Russia is (apparantly) moving on and skipping this one.

Yep, this one was just technology demonstrator just like US X-serie.


Originally posted by diefaster
of ALL the jets Russia could have ripped off, they picked the B-1? Ask anybody who has worked on these things and they will tell you it is the most problematic aircraft of all time (aside from the Spruce Goose I guess).

IMO you can't go wrong with the B-52, as far as bombers go. Any jet that can be more effective now than it was 50 --count em'-- 50 years ago when it came out, then that's probably the one to rip off.
Because of swing wing desing gives better high speed (low altitude) capability with low speed capability.
And in modern warfare BUFF is complete crap. It can't go anywhere near defended area, it's slow and shows well on radar, pretty much any fighter designed after WW2 could shoot it down without problems.
Making copy of that kind aircraft against high-capability enemy would be 110% waste of resources.


Originally posted by Murcielago
No, the X-31 was a good demonstrator on what thrust vectoring can really do, I think the reason that the Raptor has limited thrust vectoring is because of 2 reasons, 1.To complex and costly to build a 3D vectoring system which can remain stealthy at all time, 2. The days of dogfighting are dead and gone.

www.dfrc.nasa.gov...
The thrust vector system provided pitch and yaw forces by deflecting carbon-carbon composite paddles into the engine exhaust plume. The amount of deflection was proportional to the amount of thrust. In much the same way that aerodynamic control surfaces require larger deflections at low airspeeds, the paddles required larger deflections at low power settings. Consequently, the digital flight control system on the X-31 aircraft would determine the most suitable deflection for a given amount of thrust.

The X-31 program differed from most of the NACA or NASA predecessor programs in its emphasis on military applications. During flights with US and German service pilots, the X-31 aircraft was evaluated in a variety of simulated air combat roles, including air-to-air close combat, ground attack, military maneuvers and aircraft carrier operations.

This airplane was capable of controlled flight at both angles of attack greater than 70 degrees and during post-stall conditions beyond the aerodynamic limits of any conventional aircraft. During dog fights with comparable but non-thrust-vectored aircraft, the X-31 maneuverability was clearly superior. Controllability at high alpha gave it almost a helicopter-like ability to put on the brakes, do an about-face and fire from within the opponent's turning radius.




Thrust vectoring (especially 3D) system really causes much expenses, makes plane more complicated and adds weight... althought also removing normal aerodymic control surfaces gives certain advantages.
www.globalsecurity.org...
216.239.59.104...:We6NoDWI-q0J:www.airspacemag.com/asm/mag/supp/dj00/Manta.html+x-44+manta&hl=fi



And even mechanical engine nozzle and thrust vectoring system can be replaced which much simpler and lighter system.

The experimental demonstration of a fluidic, multiaxis thrust vectoring (MATV) scheme is presented for a structurally fixed, afterburning nozzle referred to as the conformal fluidic nozzle (CFN). This concept for jet flow control features symmetric injection around the nozzle throat to provide throttling for jet area control, and asymmetric injection to subsonically skew the sonic plane for jet vectoring.
link.aip.org.../123/502/1


This thrust vectoring and afterburn control system is a complex mechanical maze of hundreds of parts—hinges, seals, hydraulic actuators, bearings, flaps, etc.—that must slide, pivot, extend, and retract while maintaining tight tolerances under extreme temperature and pressure variations.

In a fluidic nozzle, effective throat area is controlled via tiny injectors symmetrically located around the nozzle throat. Depending on the configuration, injection angle, and pressure, these injectors can throttle the main exhaust stream as much as 50 percent between afterburning and normal cruise operation.

Thrust vectoring is a technique for turning an aircraft by diverting the exhaust stream using movable flaps or paddles. In fluidic thrust vectoring, a second set of injectors is symmetrically located around the nozzle flap, but the injectors are individually activated, as needed, to skew the sonic plane, the section of the exhaust where the flow reaches a speed of Mach 1.
www.memagazine.org...


www.geocities.com...
www.afrlhorizons.com...
www.afosr.af.mil...
techreports.larc.nasa.gov...
techreports.larc.nasa.gov...


reply posted on 10-10-2004 @ 05:46 AM by waynos
Originally posted by Murcielago
I prefer this pic, Kenshin.




That picture just made me think. Would the firing of a missile by an F/A-22 always have to be followed immediately by a sharp change of direction and rapid acceleration away from its now exposed position /predicted flight path?

If so could the stealthiness aspect be maintained or is the F/A-22 from this point in a good old fashioned fight with the enemy?


reply posted on 10-10-2004 @ 11:56 AM by American Mad Man
Originally posted by diefaster
The US has a history of "reacting" to Russian technology, as opposed to being on the cutting edge. The F/A 22 is no different.



Don't make me laugh. The US is THE cutting edge. Period. The Raptor is the superior plane. Period. The Russians are still waiting for their first stealth aircraft, the US has 3, with a 4th under development (F-117, B-2, F-22, F-35 JSF). The US holds the record of fastest plane (SR-71). The US has a "history" as you put it, of making the very best planes.

The F-15 is a classic example. It has never lost in A2A combat. The F-16 is still regarded as the greatest light aircraft ever made. The F-14 was the greatest interceptor ever made. The SR-71 is the greatest spy plane ever made. The B-2 is the greatest bomber ever made.

Notice the trend here?


One of the great selling points is its directional thrust. Its nozzles can be directed by the Automatic Flight Control System 30 degrees up or down.

Now compare this to the S-37. The Su-37 has 360 degree nozzle position. This, combined with its forward canards make it very very agile. I have seen video of the Su-37 at almost 0 airspeed pointing straight up. This would make other fighters stall immediately, even the F-22.


This is all well and good, but for real world situations it has no bearing. The Su-47 would never see the F-22, while the F-22 would sit back and launch an AMRAAM at BVR, let it's radar guide the missle (so that the S-37 would never know a missle was even launched) and get an easy kill. Yeah - I said it. An EASY kill.

The days of the dogfight are done. It is obsolete when you can sit back undetected and fire missles with over a 90% kill ratio miles away.

That being said, the Raptor can still dogfight, and do it with the best of them.

Remember, the Raptor can maintain an UNLIMITED 60 degree AoA - something no Russian aircraft can do. This is much more usefull in real world dogfighting then a Russian cobra or super cobra (which by the way can only be done with a half empty tank of fuel and no missles).
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