JH-7/JH-7A/JH-7B Thread

challenge

Banned Idiot
Re: JH-7/JH-7A Thread

 《参考消息》日前转载加拿大《汉和防务评论》月刊6月号(提前出版)文章,题为《中国空军依然看好歼轰-7A》。文章摘编如下:

  中国航空工业界的消息来源表示,尽管在2009年的中俄联合军事演习中,一架歼轰-7A(即“飞豹”战斗轰作机)坠毁,但是中国空军仍然非常喜欢歼轰-7A。这是国产战斗机中,目前载弹量最大的战斗机,而且简单、适用,价格远远低于苏-30MKK”,消息来源如此表示。由此判断中国空军还有可能装备更多的歼轰-7A。相比之下,某国进口了相当先进的苏-30MK系列战斗机之后,两年下来,能够操纵这种战斗机的飞行员不超过飞机总数的一半。结论是,发展中国家的空军不一定要追求好高骛远的先进多用途战斗机,反而量力而行,掌握自己能够熟练运用的歼击轰炸机,可能是正确之路。

  但是,歼轰-7A的确是上世纪70年代的设计概念,大致上的思路类似欧洲联合研发的“狂风”多用途战斗机/攻击机,由于其并非良好的机动性,在第一次海湾战争中,“狂风”战机的损失最大。歼轰-7A还没有经受过实战考验。

  不过,中国航空工业界的消息来源声称:歼轰-7A由于装备了多功能的JL10A型雷达,作战性能已经倍增,主要的精确制导武器也是国产的,例如 KD88电视制导导弹、LT2500版激光制导炸弹、YJ92反雷达导弹等。依照其 6.5-7吨的载重量,超过1000公里的作战半径(机内燃油),总体战斗力并不输给苏-30MKK很多。以中国的标准而言,歼轰-7A的确是很实用的歼击轰炸机,制导系统、地形测绘和跟踪系统等基本的对地攻击功能应有尽有,而且容易操作,因为安装了自动驾驶装置。

  对这种飞机的进一步改良还在进行之中。主要是以歼轰-7A为空中平台,探讨用于改装其他作战飞机的可能性,例如加挂电子作战、干扰吊舱,成为电子战机,中国空军目前严重缺乏专用型的电子随队干扰机。一种电子有源和欺骗干扰吊舱已经在歼轰-7A进行了测试。这种电子对抗歼轰-7已经进入海航服役。

  最新改良的重点是安装空军的数据链作战系统。在若干架歼轰-7A上发现了后座舱背后安装的数据链接收天线。

  隐形化的歼轰-7似乎已经设计至少5年以上,主要是采用钝化的机头设计和类似F-35那样的DSI进气道,同时采用气泡化的座舱,改善飞行员视野,朝多用途战斗机的方向发展。但是,目前没有发现这种改良型歼轰-7A开始试飞。

  歼轰-7A原来是海军牵头研制的“导弹攻击机”,被空军试用之后,反应良好。

  海军日前使用的歼轰-7A已经采用YJ-83型空对舰导弹,这种空射导弹的射程可能超过220公里。歼轰-7A携带4枚YJ-83。而2002年以后出现的海军H6M轰炸机也只是携带同样数量的YJ-83,后者的载弹量达到9吨而已。这也是海军同时喜欢歼轰-7A的最主要原因。

  近年来的几次重大航空活动,诸如60周年阅兵式、2008年珠海航空展中,歼轰-7A都率先现身。这表明中国海军和空军的确都看好它。航空工业界的消息来源解释认为:之所以造成这种情况是因为歼轰-7A使用的WS9涡轮风扇发动机是中国唯一能够独立生产、维修的大推力发动机,虽然是70年代的罗尔斯-罗伊斯发动机技术,但是比不能独当一面的WS10A和需要进口的AL31F发动机,WS9成本最低、已经实用化的发动机。

  歼轰-7A是否会出口?近年来一再传闻歼轰-7A可能出口伊朗,但是未获得双方官方的正式确认。这一类飞机的出口,主要取决于武器的配套,如果歼轰-7A具备了运用防区外投射、精确攻击武器的能力,再取决于价格,出口某些国家,甚至作为威慑美国的政治牌的可能性是完全存在的。至少在未来20年,歼轰-7A不会退出中国海军和空军。
according to the latest issue of Kanwa, PLAAF is satisfied with JH-7A,despite one aircraft were lost to accident during joint russia China military excercise. the while acknowledge the aircraft short coming when compare to SU-30MKK, one advantage is JH-7A is much cheaper to operate and built.
already different variant already been introduce such as escort jammer, reccon and recently one JH-7A was spotted carrying data link.this indicate PLAAF intend to extend her service beyond 2020.(possible reengine to replace antique spey engine)
stealth version already develop for the last 5 years, the aircraft adapted DSI inlet, RAM material,bubble canopy, but to date none were seen ,yet
 

Miragedriver

Brigadier
Re: JH-7/JH-7A Thread

I’m in agreement. This aircraft fits the bill that it was designed for. As a naval attack aircraft can you imagine a squadron of JH-7’s armed with a couple of external fuel tanks, two anti-shipping missiles (YJ-82) and some medium range air to air missiles for self-defense?
The aircraft is large enough to carry sufficient fuel for it’s missions and along with a large airframe comes a large random for an equally large radar system and avionics package.
The JH-7B may not be as luxurious as the Tornado, or small and agile as the Jaguar. But it’s a hard-hitting and robust aircraft that perform its intended tasks. I would rather have a squadron of JH-7B’s over a similar number of Super Etendard’s
 

Semi-Lobster

Junior Member
Re: JH-7/JH-7A Thread

Maybe you more experienced aviation fans can answer this put is there a cost effective way to increase the JH-7 series' payload beyond the JH-7A's increase in payload?
 

Miragedriver

Brigadier
Re: JH-7/JH-7A Thread

The main problem with the JH-7 series is its reliance on the licensed production of a foreign power plant. We see the same thing with the J-10 and the L-15. Once China has perfected its engine manufacturing system then it will truly be independent from outside reliance. Once that happens the Chinese aircraft industry will begin to produce some even more remarkable designs.
 

Miragedriver

Brigadier
Re: JH-7/JH-7A Thread

Maybe you more experienced aviation fans can answer this put is there a cost effective way to increase the JH-7 series' payload beyond the JH-7A's increase in payload?

The Spey engines on the JH-7 is underpowered. With a more powerful domestic engine, like the WS10 or something else, the JH-7 has a strong potential to be an even better strike platform, a role the PLAAF is traditionally weak and needs to correct. With two powerful engines, any future JH-7 variant will be able to carry much greater payloads. A JH-7 variant (with Chinese developed power plants) would undoubtedly have superior compatibility with other Chinese aircraft, which is a strong logistical advantage. With the same fire control radar system as the SU-30MKK the platform would be compatible to both Russian and Chinese ordinance.
 

challenge

Banned Idiot
Re: JH-7/JH-7A Thread

The Spey engines on the JH-7 is underpowered. With a more powerful domestic engine, like the WS10 or something else, the JH-7 has a strong potential to be an even better strike platform, a role the PLAAF is traditionally weak and needs to correct. With two powerful engines, any future JH-7 variant will be able to carry much greater payloads. A JH-7 variant (with Chinese developed power plants) would undoubtedly have superior compatibility with other Chinese aircraft, which is a strong logistical advantage. With the same fire control radar system as the SU-30MKK the platform would be compatible to both Russian and Chinese ordinance.

one solution is reengine it Ws-13.
WS-10 like AL-31F is simple to big to fit inside the JH-7 airframe.
 

dingyibvs

Junior Member
Re: JH-7/JH-7A Thread

Mirage:

It's mentioned right in the article that the JH-7A uses the WS-9 engine, and the fact that it uses an engine that is completely indigenous, from production to maintenance, is one of the biggest selling points of the aircraft.
 

Miragedriver

Brigadier
Re: JH-7/JH-7A Thread

one solution is reengine it Ws-13.
WS-10 like AL-31F is simple to big to fit inside the JH-7 airframe.

Gentlemen,
The WS9 is a licensed copy of the Rolls Royce RB168 Spey, which is still not a 100% indigenous manufacture. As mentioned before the WS9/Spey is underpowered for this particular aircraft. Granted the fighter/bomber performs its task well and is an excellent aircraft. The question presented by Semi-Lobster was how the aircraft could be improved on. I simple presented an option of improved domestically produced power plants that are 100% Chinese origin and avionic compatible with the SU-30. Granted there many be other options, but these are the two that stand out.
The statistic for the two engines that could be used on the JH-7 (compared to the WS9) are as follows:

Type length diameter weight thrust thrust AB
WS9 5.2m 1.1m 1860kg 54kN 91kN
WS10 4.9m 0.9m 1570kg 74kN 122kN
WS13 4.2m 1.0m 51kN 86kN

The problem with using the WS13 is that the thrust is comparable to the WS9. The WS10 has more thrust in both normal and after burner than both of the other power plants. Additionally the WS10 and the WS13 are smaller and weigh less than the WS9
 

dingyibvs

Junior Member
Re: JH-7/JH-7A Thread

Where did you hear that it's still not 100% indigenous? They had a great deal of problems with producing the engine in the '80s, I think it's been resolved by now. I believe the WS-15 is the engine being developed to replace the WS-9.
 
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