LEVI JET SPECICATION AND DESING
know as father of J10 development
Overview of Program
Forward fuselage of an IAI Lavi
The IAI Lavi was a single-seat, single-engine multirole fighter aircraft, principally designed to conduct high-speed penetration and first-pass bombing missions while maintaining a high level of manoeuvrability and survivability.
[8] It bore considerable similarities in terms of external appearance to the American F-16 fighter, having a similar configuration and several shared design features while being a slightly smaller aircraft. The engine air intake took the form of a plain chin type scoop with a
splitter plate, externally resembling that of the F-16, yet internally it was substantially different. For one example, an inverse
S-duct prevents exposure of the engine compressor blades to the front view of the aircraft. This drastically minimizes the frontal cross-sections of infrared and radar alike. In comparison to the F-16, the Lavi was furnished with a less powerful engine and a consequently lower
thrust-to-weight ratio.
[4]
It was envisioned that the Lavi's lifecycle costs would be considerably beneath those of the F-16, efforts were also made to achieve a lower procurement cost as well.
[8] Like the F-16, the Lavi was an aerodynamically unstable aircraft, employing a quadruplex-redundant digital
fly-by-wire system in order to provide stability and control; this was one of the aircraft's more innovative features.
[
The Lavi was powered by a single
Pratt & Whitney PW1120 turbofan engine, capable of generating 20,260 lb of thrust and enabling the aircraft to attain a maximum speed of
Mach 1.85.
[The engine, which was derived from the
Pratt & Whitney F100 that powered the F-16, was the only aspect of the aircraft that Eine acknowledged to have created a dependency upon the US. While carrying eight 750lb bombs the Lavi possessed a combat radius of 250 nmi; an alternative armament of 2,000 lb bombs enabled a 650 nmi combat radius.
[3] Possessing a 1.1:1 thrust-to-weight ratio while equipped with a combat payload, the airframe of the Lavi was designed to be capable of routinely withstanding up to 9
g
Airframe
The Lavi employed a mainly traditional airframe, the majority of development focus being upon the avionics and systems to provide the aircraft's performance edge instead.In order to meet the low structural weight requirements imposed, the use of
composite materials was employed in elements such as the wing and its substructure, as well as the fin and the skin. The forward fuselage was shaped in a manner that resulted in it naturally directing air into the engine intake and to avoid inlet blanking while flown at a
sideslip condition.
The nose of a Lavi on static display in
Beer-Sheva, 2006
The wing was unusual in having a shallow sweep on the
trailing edge, giving a fleche planform; the straight
leading edge was swept at 54 degrees, with maneuver flaps on the outboard sections. Two piece flaperons occupied most of the trailing edge, which was blended into the fuselage with long fillets.A total of nine flight control surfaces were actuated by a quadruplex fly-by-wire (FBW) system, which lacked any mechanical backup counterpart, providing a factor of aerodynamic instability of between 10 and 12 per cent.
[4] The wingtips were cropped and fitted with missile rails to carry
Rafael Python 3 air-to-air missile. At 38.5 square meters, the wing area was 38 per cent greater than the F-16, while the
aspect ratio was 2.10, barely two-thirds that of the F-16. Development of the wing and fin were the responsibility of
Grumman, who were contracted to initially manufacture the first 20 of each.
The canards, located slightly astern of and below the pilot, caused minimal obstruction in vision. They allowed for
pitch control in a single-piece, all-moving arrangement.
The nose wheel was located aft of the intake and retracted rearwards, with the light-weight main gear mounted on the fuselage. A sharply swept vertical tail was mounted on a spine on top of the rear fuselage, and was supplemented by two steeply canted
ventral strakes, mounted on the ends of the wing root fillets. Composites, used in 22% of the airframe, allowed aerolastic tailoring to the wings. They were used also in the vertical tail, the canards, and various doors and panels. IAI claimed a significant reduction in
radar cross section.
General characteristics
- Crew: 1
- Length: 14.57 m (47 ft 10 in)
- Wingspan: 8.78 m (28 ft 10 in)
- Height: 4.78 m (15 ft 8 in)
- Wing area: 33 m2 (360 sq ft)
- Empty weight: 7,031 kg (15,501 lb)
- Gross weight: 9,991 kg (22,026 lb)
- Max takeoff weight: 19,277 kg (42,499 lb)
- Powerplant: 1 × Pratt & Whitney PW1120 afterburning turbofan, 91.5 kN (20,600 lbf) with afterburner
Performance
- Maximum speed: 1,965 km/h (1,221 mph, 1,061 kn)
- Maximum speed: Mach 1.6
- Range: 3,700 km (2,300 mi, 2,000 nmi)
- Service ceiling: 15,240 m (50,000 ft)
- Rate of climb: 254 m/s (50,000 ft/min)
- Wing loading: 303.2 kg/m2 (62.1 lb/sq ft)
- Thrust/weight: 0.94