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

Hendrik_2000

Lieutenant General
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.

I guess he probably read from Wikipedia. My understanding is that China bought 96 Spey Engine enough for 2 regiment than latter they bought another 48 surplus British Air Force for another regiment Then the production switched over to JH-7A. The rumor then is British help China set up the production for Turbofan engine based on Spey But even that is latter denied by the Designer of JH 7 mr Chen Yijian in interview
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At one time China was thinking of exporting JH-7 So the spec that he quoted is probably based on old JH-7

Reports on China’s intention to cooperate with aircraft engine makers in the UK and France to improve the performance of the turbofan of PLA fighter bomber JH-7, are denied by Chief Designer of JH-7, Chen Yijian, Academician of Chinese Academy of Engineering. According to Chen, China has also already fixed problems with the JH-7 turbofan, Hong Kong newspaper Ta Kung Pao reported.

Also known as the Flying Leopard, JH-7 initially used the WS-9 Qinling turbofan, which were from turbofans produced by the Rolls-Royce Spey company in the UK. But after years of research, China has fixed problems with the turbofans of Flying Leopard on its own, according to Chen.

Chen went on to say that China’s research on turbofans is still lagging behind compared with some other countries, especially the turbofans of large aircrafts. China has been calling for more research talents to help solve this problem. He said the third generation of China’s fighter bombers, including the J-8 series, J-10 series and the Flying Leopard, have taken shape of a combatant power, and will appear in the Military Parade to celebrate the 60th anniversary of the nation.

According to Ta Kung Pao, China began research on the WS-15 Qinling-2 Turbofan in 1998. The Qinling-2 Turbofan is an improvement on the WS-9 turbofan, with increased pre-heating temperatures on the turbines and reduced weight for greater efficiency. Tests on the Qinling-2 Turbofan in October 2008 were successful. It is now technically competitive to the late M53-P2 engine from France.

Here is the Spec for M53_P2
M53-P2 - powered later Mirage 2000C models and used to upgrade earlier models [2]
Dry thrust: 64.7 kN (6,600 kgp / 14,500 lbf)
Afterburning thrust: 95.1 kN (9,700 kgp / 21,400 lbf)
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challenge

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

any info about her T:W ratio.?
T:W ratio for spey engine was 6.5.according to an article 6 years ago, Xian aircraft claim that the engine was basically a early 60's technology.
according to article, new cooling blade, afterburner undergoes redesign.3 stages fan reduces to 2....
 

tphuang

Lieutenant General
Staff member
Super Moderator
VIP Professional
Registered Member
Re: JH-7/JH-7A Thread

They are having no problem producing WS-9 domestically. It achieved production certification in 2007, which means they have resolved all the mass production issues and have no problem producing the parts needed. There is no need to get concerned about T/W ratio, since JH-7A's role is basically just acting as a bomb truck. With the current thrust level, PLAAF is more than satisfied with its performance. WS-15 is not an improved WS-9.
 

Hendrik_2000

Lieutenant General
Re: JH-7/JH-7A Thread

They are having no problem producing WS-9 domestically. It achieved production certification in 2007, which means they have resolved all the mass production issues and have no problem producing the parts needed. There is no need to get concerned about T/W ratio, since JH-7A's role is basically just acting as a bomb truck. With the current thrust level, PLAAF is more than satisfied with its performance. WS-15 is not an improved WS-9.

Problem is the wrong word. What he probably meant is improvement. Ta Kung Pao has a habit to confuse thing. This Journalist has no idea about Turbofan. He mixed up the designation of the engine. You are right JH-7 is just a bomb truck so no need to concern about T/W ratio. In any mission they will be escorted by more capable fighter
 

adeptitus

Captain
VIP Professional
Re: JH-7/JH-7A Thread

The most important improvement for the JH-7/A... I'd vote radar/sensor range first and better munitions 2nd. Your target (ships) are not going to out-run a supersonic aircraft anyway, so being a little slower will still get you there. But surviving the air-defense missiles and actually scoring a hit against multi-layered defense opponent is another story.
 

lilzz

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

Just redesign front part to include stealth capability. JH-7B with front stealth feature and WS9 still pose as an interesting platform against surface vessels on the East China Sea.
 

Hendrik_2000

Lieutenant General
Re: JH-7/JH-7A Thread

The most important improvement for the JH-7/A... I'd vote radar/sensor range first and better munitions 2nd. Your target (ships) are not going to out-run a supersonic aircraft anyway, so being a little slower will still get you there. But surviving the air-defense missiles and actually scoring a hit against multi-layered defense opponent is another story.

Well the best range of typical Ship air defense missile is around 100 mile. The Range of ASM is getting longer and longer I believe the range of C 803 is around 300 km or more.

The attacking jet will release their deadly missile at a distance beyond the reach of anti ship missile.

As I said before they will be escorted by more capable jet fighter to ward off CAP
 

latenlazy

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

airframe is consider obselete design , reflect the late 60's design .it need something new.

Acquiring a new toy when you don't need extra capabilities is poor decision making. The JH-7 serves just fine for China's current strike capability needs. They'll roll out something new when that's not the case anymore.
 

Hendrik_2000

Lieutenant General
Re: JH-7/JH-7A Thread

airframe is consider obselete design , reflect the late 60's design .it need something new.

I should not respond to this nonsense but can't help it. Performance wise except for higher speed on lower attitude due to swing wing, The Toronado is almost identical to JH-7A

High speed at lower attitudeis useless anyway. Proven during the last Gulf war when the British abandoned low speed attack due to high casualty rate. apparently the cheap short range missile catch up with the Toronado

But you don't call Toronado an outdated design. BTW European nation will be using Toronado for a long Time

I don't know what gotten into you. Your can have your opinion but that is just that opinion
 
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