Friday, April 24, 2009

MiG-29


Cockpit

MiG-29 cockpit, 1995The cockpit features a conventional centre stick and left hand throttle controls. The pilot sits in a Zvezda K-36DM zero-zero ejection seat which has had impressive performance in emergency escapes.

The cockpit has conventional dials, with a head-up display (HUD) and a Shchel-3UM helmet mounted display, but no HOTAS ("hands-on-throttle-and-stick") capability. Emphasis seems to have been placed on making the cockpit similar to the earlier MiG-23 and other Soviet aircraft for ease of conversion, rather than on ergonomics. Nonetheless, the MiG-29 does have substantially better visibility than most previous Russian jet fighters, thanks to a high-mounted bubble canopy. Upgraded models introduce "glass cockpits" with modern liquid-crystal (LCD) multi-function displays (MFDs) and true HOTAS.


[edit] Sensors

The baseline MiG-29B has a Phazotron RLPK-29 (Radiolokatsyonnui Pritselnui Kompleks) radar Fire control system (FCS) which includes the N019 (Sapfir 29; NATO: 'Slot Back') look-down/shoot-down coherent pulse-Doppler radar and Ts100.02-02 digital computer. The original N019A, which was supposed to put the MiG-29 on par with its Western counterparts, was a disappointment to VVS. It had shortcomings in beyond-visual-range (BVR) engagements.[citation needed] Tracking range against a fighter-sized target was only about 70 km (38 nmi) in the frontal aspect and 35 km (19 nmi) in the rear aspect. Range against bomber-sized targets was roughly double. Ten targets could be displayed in search mode, but the radar had to lock onto a single target for semi-active homing (SARH). The signal processor also had trouble with ground clutter, and ranges in the look-down mode were consequently further reduced.[citation needed] It was also quite susceptible to jamming.[citation needed] These problems meant the MiG-29 was not able to reliably utilize the new Vympel R-27R (NATO: AA-10 "Alamo") long-range SARH missile at its maximum ranges.


MiG-29 nose showing radome and IRSTThese performance deficiencies stemmed largely from the fact the N019 radar was not, in fact, a new design. Instead, the system was a further development of the architecture already used in Phazotron's Sapfir-23ML system, then in use on the MiG-23ML. During the initial MiG-29 design specification period in the mid-1970s, Phazotron NIIR was tasked with producing a modern radar for the MiG-29. To speed development, Phazotron based its new design on the work undertaken by NPO Istok on the experimental "Soyuz" radar program. Accordingly, the N019 was originally intended to have a flat planar array antenna and full digital signal processing, giving a detection and tracking range of at least 100 km against a fighter-sized target. Given the state of Soviet avionics technology at the time, it was an ambitious goal. Testing and prototypes soon revealed this could not be attained in the required timeframe, at least not in a radar that would fit in the MiG-29's nose. Rather than design a completely new, albeit more modest radar, Phazotron reverted to a version of the twist cassegrain antenna used successfully on the Sapfir-23ML to save time and cost. This system used the same analog signal processors as their earlier designs, coupled with a NII Argon-designed Ts100 digital computer. While this decision provided a working radar system for the new fighter, it inherited all of the weak points of the earlier design. This reliance on 1960s-era technology continues to plague the MiG-29 in terms of its ability to detect and track airborne targets at ranges available with the R-27 and R-77 missiles, although new designs like the digital N010 Zhuk-M address the serious signal processing shortcomings inherent in the analog design. Still, most MiG-29 aircraft in service continue to use the analog N019 or N019M radar, although VVS has indicated its desire to upgrade all existing MiG-29s to a fully digital system.


MiG-29UB on display, showing gunportThe N019 was further compromised by Phazotron designer Adolf Tolkachev’s betrayal of the radar to the CIA, for which he was executed in 1986. In response to all of these problems, the Soviets hastily developed a modified N019M Topaz radar for the upgraded MiG-29S aircraft. However, VVS was reportedly still not satisfied with the performance of the system and demanded another upgrade. The latest upgraded aircraft offer the N010 Zhuk-M), which has a planar array antenna rather than a dish, improving range, and a much superior processing ability, with multiple target engagement capability and compatibility with the Vympel R-77 (or RVV-AE) (NATO: AA-12 'Adder'). A useful feature the MiG-29 shares with the Su-27 is the S-31E2 KOLS, a combined laser rangefinder and IRST in an 'eyeball' mount forward of the cockpit canopy. This can be slaved to the radar or used independently, and provides exceptional gun-laying accuracy.


[edit] Armament

A Ukrainian Air Force MiG-29 with armaments laid outArmament for the MiG-29 includes a single GSh-30-1 30 mm cannon in the port wing root. This originally had a 150-round magazine, which was reduced to 100 rounds in later variants. Original production MiG-29B aircraft cannot fire the cannon when carrying a centerline fuel tank as it blocks the shell ejection port. This issue was corrected in the MiG-29S and later versions. Three pylons are provided under each wing (four in some variants), for a total of six (or eight). The inboard pylons can carry either a 1,150 liter (300 US gallon) fuel tank, one Vympel R-27 (AA-10 "Alamo") medium-range air-to-air missile, or unguided bombs or rockets. Some Soviet aircraft could carry a single nuclear bomb on the port inboard station. The outer pylons usually carry R-73 (AA-11 "Archer") dogfight missiles, although some users still retain the older R-60 (AA-8 "Aphid"). A single 1,500 liter (400 US gallon) tank can be fitted to the centerline, between the engines, for ferry flights, but this position is not used for combat stores. The original MiG-29B can carry general-purpose bombs and unguided rocket pods, but not precision-guided munitions. Upgraded models have provision for laser-guided and electro-optical bombs, as well as air-to-surface missiles.

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