Originally posted by waynos
Ooh stealth spy, where to begin?
The sukhoi with a stable airframe is anyday more agile than any delta winged unstable airframe
The Sukhoi Su-30, I presume you mean, is more manouverable, the video posted here the other day showed that. The point I was making was about agility
by purely aerodynamic means rather than TVC, which is what gives the Sukhoi its advantage.
Understand one thing, a naturally stable airframe cannot be more agile than an unstable one unless it has TVC, thats the point of making it
unstable. A stable airframe wants to fly in a straight line, thus making rapid manouvres is something it has to be made to do. An unstable
airframe however wants to be flinging itself all over the place so a rapid manouvre is acheived that bit more quickly. That may be over
simplified but its basically how it works. without TVC the Sukhoi would be easy meat for the Typhoon, however it has TVC so it isn't. That was sort
of the point I was making.
i found out that some info i had previously posted was incorrect .
Here is the correct info : source : vayu-sena.tripod.com...
Airframe and Aerodynamics
The Su-30MKI is a highly integrated twin-finned aircraft. The airframe is constructed of titanium and high-strength aluminium alloys. The engine
nacelles are fitted with trouser fairings to provide a continuous streamlined profile between the nacelles and the tail beams. The fins and horizontal
tail consoles are attached to tail beams. The central beam section between the engine nacelles consists of the equipment compartment, fuel tank and
the brake parachute container. The fuselage head is of semi-monocoque construction and includes the cockpit, radar compartments and the avionics bay.
Su-30MKIs also have a high percentage of composites used in the air-frame.
The Su-30MKI aerodynamic configuration is an unstable longitudinal triplane. The canard increases the aircraft lifting effectiveness. It
deflects automatically and allows high angle-of- attack flights. The integral aerodynamic configuration combined with thrust vectoring results in
practically unlimited manoeuvrability and unique taking off and landing characteristics.
Stability and control are assured by a digital FBW. The canard notably assists in controlling the aircraft at large angles of attack (AoA) and
bringing it to a level flight condition. The aircraft has a newly developed wing with increased relative thickness, accommodating a larger amount of
fuel. The wing will have high-lift devices featured as deflecting leading edges and flaperons acting the flaps and ailerons. At subsonic flights, the
wing profile curvature is changed by a remote control system which deflects the leading edges and flaperons versus the AoA (Angles of Attack).
The Su-30MKI will have a reinforced airframe in order to accommodate a weapons load of 17,650 lb (8,000 kg) compared with half that for the Su-30K,
and the maximum takeoff weight is projected at 83,770 lb (38,000 kg) versus 73,850 lb (33,500 kg).
The Su-30MKI has no AoA limitations: it can fly at even 180 degree AoA and still recover. This high super-agility allows rapid deployment of weapons
in any direction as desired by the crew. The addition of another seat means that the pilot is free to concentrate on flying the aircraft while the
second pilot can engage targets.
Mikhail Simonov was stung by press criticism that this machine was appearing at airshows doing tailslides and Cobras without any underwing stores. So
it was promptly fitted with a representative warload consisting of (from port wingtip) - AA-11, AA-11, AA-10, Kh-31P, 6 x OFAB-100-120 bombs on a MER
fitted to the port lower intake, KAB-500KR on centreline pylon, Kh-29T on lower Stbd intake, Kh-59M, RVV-AE, AA-11, AA-11 and still did its full show
routine! A similar performance was witnessed at an airshow where the Landing Gear could not retracted in a Su-37, but Yevgeny Frolov still went on do
perform the show routine without any changes!
The forward facing Phazotron NO11M Bars is a powerful integrated radar sighting system. The N011M is a digital multi-mode dual frequency band radar (X
and L Band, NATO D and I). Antenna diameter is 1m, antenna gain 36dB, the main sidelobe level is -25dB, average sideobe level is -48dB, beamwidth is
2.4 deg with 12 distinct beam shapes. The antenna weighs 100kg.
The N011M radar has been under flight testing since 1993, fitted to Su-27M (Su-35) prototype '712'. It employs the same level of technology as the
now abandoned N014 radar which was to have equipped Mikoyan's MFI "fifth-generation" fighter and was initiated by Tamerlan Bekirbayev. The nose of
the Su-30MKI was modified (compared the Su-27) to accommodate the fixed antenna array and more avionics boxes.
Note that the N011M is different from the N011: the N011 is mechanical scanning while the former is features a phased array antenna and is much more
capable. The mechanical scan version equips the No 24 Sqn aircraft. "We can count the number of blades in the engine of the aircraft in sight (by the
NO11M) and by that determine its type," NIIP claims.
The N011M can function both in air-to-air and air-to-land/sea mode simultaneusly while being tied into a high-precision laser-inertial / GPS
navigation system. It is equipped with a modern digital weapons control system as well as anti-jamming features. The aircraft has an opto-electronic
surveillance and targeting system which consists of a IR direction finder, laser rangefinder and helmet mounted sight system. The HMS allows the pilot
to turn his head in a 90º field of view, lock on to a target and launch the much-feared R-73RDM2 missile.
In preliminary long range aiming, the targets (co-ordinates of which enter the navigation system) are locked on automatically, and the onboard locator
is disengaged. The aircraft flies radio silent to the targets, and at a range close to the maximum one required for launching the weapons, the threat
updating aids are engaged and the weapon is fired. In doing so, the attack time is minimal and the low-observable target approach increases the
success of a mission greatly. The Su-30MKI can be fitted with an imaging IR navigation and attack equipment pod to provide night attacks against
small-size ground targets.
For aircraft N011M has a 350 km search range and a 200 km tracking range. The radar can track and engage 20 air targets and engage the 8 most
threatening targets simultaneously. The forward hemisphere is ±90º in azimuth and ±55º in elevation. These targets can include cruise/ballistic
missiles and even motionless helicopters. A MiG-21 for instance can be detected at a distance of up to 135 km. Design maximum search range for an F-16
target was 140-160km. A Bars' earlier variant, fitted with a five-kilowatt transmitter, proved to be capable of acquiring Su-27 fighters at a range
of over 330 km. In comparison, the advanced Kopyo radar found in the latest MiG-21UPG can detect small drone targets at a range of 50 km. Another
radar meant for the Flanker family, Phazotron-NIIR’s Zhuk-MS radar has a range of 150-180km against a fighter and over 300km against a warship. N011M
can withstand up to 5 percent transceiver loss without significant degredation in performance. Additionally the Su-30MKI can function as a
'mimi-AWACS' and can act as a director or command post for other aircraft. The target co-ordinates can be transferred automatically to atleast 4
other aircraft. This feature was first seen in the MiG-31 Foxhound, which is equipped with a Zaslon radar.
Russian designers have stated that they believe that the key to dogfight supremacy rests in the pilot's ability to engage the enemy in any position
relative to their own aircraft. While TVC permits post-stall maneuvering and pointing which are impossible in conventional aircraft, they are
convinced that a rearward facing radar and missiles that can be fired in the aft-quadrant all join to make an unbeatable integrated weapons system.
Ground surveillance modes include mapping (with Doppler beam sharpening), search & track of moving targets, synthetic aperture radar and terrain
avoidance. To penetrate enemy defenses, the aircraft can fly at low altitudes using the terrain following and obstacle avoidance feature. It enables
the pilot to independently find his position without help from external sources (satellite navigation, etc.); detect ground targets and their AD
systems; choose the best approach route to a target with continuous updates fed to the aircraft navigation systems; and provide onboard systems and
armament with targeting data.
According to Sukhoi EDB the Su-30MKI is capable of performing all tactical tasks of the Su-24 Fencer deep interdiction tactical bomber and the Su-27
Flanker A/B/C air superiority fighter while having around twice the combat range and atleast 2.5 times the combat effectiveness.
The N011M offers a quantum leap in technology over the earlier Russian radars. Small ground targets, like tanks, can be detected out to 40-50 km. The
MiG-29, Su-27 and other fighters can be provided with a ground strike capability only if their radars can operate in the down-looking mode which
generates a map of ground surface on a cockpit display (this mode is called the Mapping Mode).
N011M ensures a 20 m resolution detection of large sea targets at a distance up to 400 km, and of small size ones - at a distance of 120 km. Coupled
with the air-launched Brahmos-A AShM, the Su-30MKI will become an unchallanged platform for Anti-Ship duties. The Brahmos is a result of a joint
collaboration between India and Russia and is a variant of the Yakhont AShM (which has not entered service).
The Su-30MKI also has a NO12 rearward facing radar which is housed at the end of the center section spine or sting and alerts a pilot to the approach
of an enemy aircraft on his tail. This radar has a range of 50km for a 3 sqm RCS target and 100 km for large ones. It features a surveillance area of
±60º in azimuth and elevation. It enables the pilot to fire the R-73RDM2 missile without turning to get a positive lock on the enemy aircraft. The
missile will be launched as usual and will then flip 180º to intercept the aircraft.
The rear-firing capability of the Vympel R-73RDM2 in itself a viable defense system. Approach-warning, acquisition and queuing of targets for these
rear-firing missiles would be the function of the rear-mounted radar. The R-73 missile will lock-on to its target before launch and will maintain its
lock-on throughout its launch and flight sequence. The radar can also provide steering commands to a RVV-AE (R-77) before launch or to RVV-AE variants
that have high-angle-off seeker heads (beyond ±160°) locked-on before launch.