IAR 99

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IAR 99 "Şoim" (Hawk) is a modern advanced jet trainer and light attack aircraft capable of performing close air support and reconnaissance missions. IAR 99 is intended to replace the L-29 Delfin as trainer from the Romanian Air Force inventory. The aircraft is of semi-monocoque design, with tapered wings and a swept back tail unit. A large blade-type antenna installed beneath the nose on the port side of the fuselage gives the IAR 99 trainer a distinctive appearance.

1 Development
2 Cockpit
3 Avionics
4 Countermeasures
5 Specifications
6 Operators

[edit] Development

The design of the aircraft started in 1975 and this would be the first jet trainer fully designed and built in Romania. In 1979 funding was approved for building the first trainer by IRAv Craiova where IAR 93 was currently built. The prototype flew on 21st of December 1985 with Lt. Col. Vagner Ştefănel at controls. The aircraft entered series production in 1987 and until 1989 15 aircraft were delivered to Romanian Air Force. In 1990 the fall of the Eastern Block created new export opportunities for the aircraft, but even if the aircraft proved excellent aerodynamic and handling qualities, it was left behind in its class because of the antiquated on-board avionics. Therefore upgrading of the avionics became a priority. First upgrade attempt was made in 1990 by IRAv Craiova together with Texas based company Jaffe Aircraft Corporation. Two aircraft were modified by installing additional instrumentation, as well as some Honeywell avionics. The canopy was changed to a two piece design instead of the original one piece. The airplanes were displayed at Farnborough Air Show in 1990 and were declared as an intention to enter competition for the Joint Primary Aircraft Training System program in US. The program did not come to fruition though.

In 1992 a new upgrade program is started together with IAI Lahav of Israel. One aircraft was brought to the new IAR 109 "Swift" standard, and was intended Romanian Air Force use and as well for export. The aircraft was equipped with HOTAS (Hands On Throttle and Stick) controls in both cockpits, wide angle HUD (Head-Up Display) with Up Front Control Panel in the front cockpit, 2 3 inch displays on both cockpits, ring laser gyro Inertial Navigation System (INS), as well as the integration of both Eastern and Western weapon systems on the aircraft. The aircraft was displayed at Le Bourget in 1993. In 1994 this program was also interrupted.

In 1996 the upgrade program of the IAR 99 was revived with the need for a lead-in trainer for the newly upgraded MiG-21 Lancer. Israeli company Elbit was chosen as an integrator and the avionics package is compatible with 5th generation fighter systems and it is inspired from the MiG-21 Lancer upgrade but adapted to IAR 99 needs. The first upgraded IAR 99 was the 18th production aircraft, which performed its first flight on 22nd of May 1997. The upgraded IAR 99 was displayed at Le Bourget in 1997 and Farnborough Air Show in 1998. On 6th of August 1998, the Romanian Government approved the introduction into series production of the upgrade program for 40 IAR-99s out of which 24 were supposed to be delivered by 2001. The new variant was designated as IAR 99C.

[edit] Cockpit

The aircraft has tandem stepped dual control cockpit equipped with Martin-Baker Mk 10 zero-zero ejection seats. The instructor's seat at the rear position is raised by 35 cm to provide better visibility. The canopy is made as a single piece and it opens to the starboard side.

The cockpit is equipped with HOTAS control. The cockpit is equipped with liquid crystal displays. Both the pilot and the instructor are equipped with an DASH Display and Sight Helmet which is currently deployed on the MiG 21 Lancer The helmet slaves the on-board weapons systems to the pilot's line of sight. The visor's display confirms when target acquisition has been achieved. The visor also displays the data from the HUD. Flying and navigation data are displayed on HUD (Head-up Display), on the helmet DASH and MFDC (color multifunction displays).

[edit] Avionics

Elbit is supplying the aircraft's advanced avionics suite installed on a MIL-STD-1553B data bus. The advanced avionics suite, including communications, navigation, identification systems and the cockpit configuration, are similar to those of the MiG 21 Lancer and F-16 fighter aircraft. The IAR-99 is also equipped with video and debriefing systems.

The communication systems include VHF and UHF communications, voice activated intercom and an IFF transponder. The flight systems include a VOR/ILS, linked VHF omnidirectional antenna radio ranger linked to the instrument landing system. Other navigation tools include distance measuring equipment (DME), an automatic direction finder (ADF), a Northrop Grumman inertial navigation system and a Trimble GPS system.

One of the best elements of the aircraft avionics is virtual training system which allows, based on a data link system, in-flight simulations of firing and air combat capabilities using two or more aircraft.

[edit] Countermeasures

The IAR 99 electronic warfare suite is based on the Elisra Electronic Systems radar warning receiver and electronic countermeasures pod plus a chaff and flare decoy dispenser. The systems are integrated through the 1553 data bus. The radar warning receiver detects pulse-Doppler, pulse and continuous wave radar threats and provides threat identification by comparing signal characteristics against a threat database.

[edit] Specifications

[edit] General characteristics

Crew: two, in tandem
Length: 11.01 m (35 ft 9 in)
Wingspan: 9.85 m (32 ft 4 in)
Height: 3.9 m
Wing area: 18.7 m²
Empty: 3,200 kg
Loaded: 4,400 kg (9,700 lb) trainer with 2 pilots
Maximum takeoff: 5,560 kg (12,260 lb) attack
Power-plant: 1x Turbomecanica built Rolls-Royce Viper Mk632-41M turbojet 4,000 lbf (17.8 kN) thrust.

[edit] Performance

Maximum speed: 865 km/h (mph)
Trainer configuration range: 1,100 km
Ground attack configuration range: 967 km
Typical combat radius: 385 km
Service ceiling: 12,900 m (42,300 ft)
Rate of climb: 1,050 m/min (3,450 ft/min)
Wing loading: kg/m² ( lb/ft²)
Thrust-to-weight:
Trainer configuration take-off run: 450 m
Trainer configuration landing run: 550 m
Ground attack configuration take-off run: 960 m
Ground attack configuration landing run: 600 m

[edit] Armament

4 underwing hardpoints capable of holding 250kg each and 1 central hard-point capable of holding 400kg
the interior under-wing hard-points are wet capable of carrying 225l drop tanks
up to 1,000 kg of stores including:
- 23 mm GSh-23 gun pod
- BEM 250 bomb
- BE 100 bomb
- BE 50 bomb
- Mk 82 bomb
- Opher IR guided bomb
- LGB laser guided bomb
- LPR 57 rocket launcher
- BL755 cluster bombs
- AA-8 Aphid / R60 AAM
- Python 3 AAM