Fórum Defesa Brasil

Jacobs escreveu:Visto que a China tem milhares deles em operação, são bons caças de defesa de ponto.

J-7E


J-7E (Chinese Internet)

The J-7E was the third-generation derivative of the Chengdu Aircraft Industrial Corporation (CAC) J-7 family. First introduced in the early 1990s, the aircraft was based on the airframe of the J-7II, but with redesigned wings and upgraded avionics. The fighter was also prompted to the international market under the designation F-7MG, and is serving with the Pakistani Air Force (PAF) under the designation F-7PG. The J-7E production began in the early 1990s and stopped in 2002. A further improved domestic variant designated J-7G was introduced in 2002.

As Chengdu’s attempt to reverse engineer the MiG-21MF Fishbed-J all-weather fighter was not entirely successful, the company went back to the J-7II (MiG-21F-13 Fishbed-C) design in the late 1980s to develop an improved variant J-7E for the PLA. The J-7E first flew in May 1990 and the flight testing had been completed by 1992. The J-7E began to serve with the PLA Air Force (PLAAF) and PLA Naval Air Force (PLANAF) in 1995. The export variant F-7MG upgraded with Western avionics was first revealed during the 1996 Zhuhai Air Show.

A significant amount of new technologies has been adopted in the J-7E/F-7MG’s development and production, including computer aided design and manufacturing (CAD/CAM), numerical control processing, laser/electromagnetic tests, composite materials, and water jet cutting. These technologies enabled the 1950s-era design to be built in the 1990s quality standards, thus improving the aircraft’s performance and capabilities.

Improvements on the J-7E mainly focused on aerodynamic performance and avionics. The original delta wing plan-form was with a new “double-delta” design similar to that of the Russian Su-15 and Swedish Saab J-35 Draken. The new wings retain the existing leading-edge sweep angle of 57° inboard but have reduced sweep angle of 42° on the outboard wing, which also has a leading-edge flap fitted. This design offered an excellent solution to the inherent low aspect ratio problem of a slender delta. The slighting larger wingspan and 8.17% more wing area also gave an increased internal fuel capacity (from 2,080kg to 4,165kg) and much enhanced manoeuvrability.

The aircraft’s performance was further enhanced by the introduction of an improved Liming (LMC) Wopen-13F turbojet rated at 44.1kN dry and 66.7kN with afterburning, giving a thrust-to-weight ratio of about 0.9 in clean, take-off configuration compared with 0.8 of J-7B. The sea-level climbing rate has increased from 155m/s to 195m/s; the ferry range has increased from 1,500km to 2,200km; the G limit has increased from 7g to 8g. The maximum instantaneous turn rate of the J-7E is 25.2 degree/sec, and the maximum sustained turn rate at 1,000m altitude is 16 degree/sec. According to CAC’s advertisement, compared with the J-7B, the overall aerodynamic performance of J-7E has increased by 43%, and the combat effectiveness has increased by 84%.

Avionics suite of the aircraft includes the Type 226 ranging radar, JT-1 head-up display (HUD), KW8602 radar warning receiver (RWR), Type 8430 air data computer, JD-3 tactical aircraft navigation (TACAN), KG-8605 internal radar noise jammer, and Type 941-4AC chaff/flare dispenser.

Fixed weapon includes one 30mm Type 30-1 cannon with 60 rounds fitted in lower starboard side of the fuselage. Four under-wing stores stations can carry up to 2,000kg of disposable stores (each unit rated at 500kg), typical weapons are PL-5 or PL-8 short-range AAMs, free-fall weapons such as 500, 250, 100 and 50kg bombs, and multiple rocket launcher pods each carrying twelve 55mm or seven 90mm unguided rockets. Centre fuselage station and two outboard wing stations are pumped to carry 720 litre drop tanks.

PiLi-8 Short-Range Air-to-Air Missile

The PiLi-8 (PL-8) is a Chinese copy of the Israeli Rafael Python-3 infrared-homing short-range air-to-air missile (SRAAM) produced under license. The missile has been developed by China Academy of Air-to-Air Missile (previously known as 607 Institute) based in Luoyang, Henna Province. The missile has been serving with the PLA since the early 1990s as a standard close-range air combat weapon for its new-generation indigenous fighters such as J-7E/G, J-8B/D, and J-10. A surface-to-air version of the missile was developed but did not enter production.

Programme

Python 3 is a third-generation short- to medium-range air-to-air missile developed by Israel in the early 1980s to arm its F-15, F-16 and Mirage fighter fleet. The missile took part in the 1982 Fifth Middle-East War (Lebanon War) against Syrian aircraft before its design was even finalised. The Israeli Air Force claimed that the missile had better performance in speed, turning radius, and range compared to the U.S. AIM-9L Sidewinder. China and Israel agreed on the deal to purchase a small number of the Python 3 as well as a co-production in 1982, and the delivery of the missile began in September 1983. The PLAAF test fired some Python 3 missiles provided by Israel and was highly satisfied with its performance. The development of the Python 3 copy began in 1983. Israel has reportedly supplied 1,200 sets of Python 3 kits for licensed local production of the missile in China.

To streamline the design, development, manufacture, and marketing of the air-to-air missile, in the mid-1980s China integrated most of its air-to-air missile R&D teams and manufacturing facilities located in different regions into one AAM complex, known as Luoyang Electro-Optics Technology Development Centre (EOTDC). The PL-8 became the first project undertaken by the new organisation. In 2002 the centre was rename as China Academy of Air-to-Air Missile after Shaanxi Hanzhong Air-to-Air Missile Factory (also known as Hanzhong Nanfeng Machine Factory or 202 Factory) was relocated to Luoyang and merged with the centre.

The first batch of Chinese-assembled Python 3 using Israeli kits rolled out between March 1988 and April 1989. The missile was given an official designation PL-8. The Python 3 seeker technology was also used to upgrade China’s own indigenous PL-9 air-to-air missile programme. The PL-8 was possibly tested in the early 1990s and the batch production began thereafter. The Israeli-made contents on these missiles were gradually reduced and by the late 1990s China was able to produce the missile using 100% indigenously made components.

Design

The PL-8 is the PLA’s first AAM with all-aspect attack capability. Unlike the older generation AAMs such as PL-2 and PL-5, the PL-8 does not require the pilot to steer his plane to aim the enemy plane to fire the missile. Instead, the missile can be fired immediately after the enemy plane enters a 30 degree cone of target zone. Later variants of the PL-8 is said to be able to use in conjunction with the helmet-mounted sight (HMS) to improve the performance. The missile is mainly used to arm the high-performance fighters such as J-8B/D and J-10, while the older PL-5 is being used to arm low-performance fighters such as J-7 and ground attack aircraft such as JH-7 and Q-5.

The PL-8 resembles the Python 3 in appearance. The missile features four front canard control surfaces located near the missile nose, and four large stabilising fins near the tail. The IR seeker is located at the nose of the missile, followed by the warhead and fuse section. The missile is powered by a single solid rocket motor.

Main features of the PL-8 include:

All-aspect capability, including head-on interception
Effective against most evasive tactics
Capable of intercepting low-signature and low-altitude threats
15km maximum effective range at high altitude
Active proximity fuse, based on lead bias navigation system
Highly efficient warhead
Versatile target acquisition modes, including slaving to advanced radar system
Reliability greater than 95%
Specifications

Missile length: 2.99m
Missile diameter: 0.16m
Wingspan: 0.81m
Launch weight: 115kg
Warhead: 10kg HE
Propulsion: One solid-propellant rocket motor
Speed: Mach 2
G Limit: 35G
Range: 0.5~15km
Guidance: All-aspect infrared (helmet-mounted sight guidance in later versions)

Last update: 12 October 2008

Enlil escreveu:Lindão ... Acho q até o Orao é bem mais "bunitim", embora também seja feio de lascar. Acho o Fantan o mais feio de todas as aeronaves militares chinesas pré-J10. É, de fato gosto não se discute ...


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