JF-17 Thunder Multirole Fighter [Thread 7]

[gambit]

Since DEEC is 70s technology, I suppose its software doesn't benefit from the latest and greatest advancements made in engine control? In that sense, FADEC being newer would give better performance in terms of fuel consumption, engine life etc. Is this correct?

Without EEC, that 'Full Authority' concept is not possible.

Also, would you mind if I enlist your help on a rather difficult conversation I have had with somebody on another thread? I would want you to go through some lengthy posts and basically comment, that's all. If you don't mind?

If it is a technical subject then I can try to help in clearing up misunderstanding. But I usually stay out of the politics and social issues of countries.

 

[Sinnerman108]

Yes.


No but DEEC does reduce responce time to 5s. I think i have suggested somewhere development of annular ignition chamber utilizing extremely high operative temperatures reducing smoke. DEEC like controls are essential requirement for Hi-T ignition chambers.


DEEC like variants exists. Essential req. for smokeless tubofan amongst other things. Its a 70s phenomenon jointly collaborated by PW, lawrence-livermore & Nasa.


We'll see when we reach the bridge.

Extremely high temperature means your turbines are much more stress; and there is your biggest technology problem.
Even with air cooled and ceramic coating, on crystal bred blades; there is a limit to how far we can push that.

You have a point in re-designing the combustion chambers; but as highlighted above that comes with it's own can of worms.

I would exhaust others means before moving into that.

 

[Thunder.Storm]

State-owned China Central Television (CCTV) reports (via Global Times) that the private Chinese company Chengdu Aerospace Superalloy Technology Co. Ltd. (CAST) can mass-produce single-crystal turbine blades for use on jet engines and rockets.

Chinese analysts view CAST’s progress in this respect as integral to fulfilling the People Liberation Army’s (PLA) burgeoning and increasingly qualitatively driven requirements, such as its push for next-generation combat aircraft, namely the Chengdu J-20, Xian H-20 stealth bomber and the Shenyang FC-31.

Introduced in the late 1980s, single-crystal engine blades are integral components to current and future turbofan engines. These blades are designed to sustain the mechanical loads borne from the significantly high rotational speeds (e.g. 12,000+ rpm) required of them in turbofan engines.

“Mastering the production technology of single-crystal turbine blades and aero engines will offer assured supply to the army and increase our fighter jets’ ability to withstand prolonged battles,” said retired PLA Navy (PLAN) Rear Admiral Xu Guangyu to the Global Times.

Notes & Comments:

The state-owned Aero Engine Corporation of China (AECC) is at the forefront of Chinese turbofan engine research, development and production efforts. However, as recently as this March, AECC’s Chen Xiangbao told the China Daily that the quality of Chinese single-crystal blades (when mass-produced) was “not very satisfactory.” However, Chen noted that the challenge was not insurmountable.

It is not known if CAST’s mass-produced single-crystal turbine blades are at-par with the quality-control requirements set by AECC. If this is not the case, then CAST will be unlikely to provide for China’s domestic military and civil aviation market (as most engines are sourced from AECC, which – if interested in CAST – would subcontract production work to that company).

That said, it would appear that Chinese private sector players are making relatively rapid strides in offering marketable products. Granted, the means vary. For example, the Chinese company Skyrizon has partnered with Ukraine’s Motor Sich to assemble and sell the latter’s various engine designs in China, including the AI-222 turbofan, D-27 propfan, MS-500V turboshaft and others.[1]

Regarding CAST, it should be noted that its parent company is also involved in purifying rhenium, which is an essential rare earth metal for producing single-crystal blades.

 

[Chak Bamu]

State-owned China Central Television (CCTV) reports (via Global Times) that the private Chinese company Chengdu Aerospace Superalloy Technology Co. Ltd. (CAST) can mass-produce single-crystal turbine blades for use on jet engines and rockets.

Chinese analysts view CAST’s progress in this respect as integral to fulfilling the People Liberation Army’s (PLA) burgeoning and increasingly qualitatively driven requirements, such as its push for next-generation combat aircraft, namely the Chengdu J-20, Xian H-20 stealth bomber and the Shenyang FC-31.

Introduced in the late 1980s, single-crystal engine blades are integral components to current and future turbofan engines. These blades are designed to sustain the mechanical loads borne from the significantly high rotational speeds (e.g. 12,000+ rpm) required of them in turbofan engines.

“Mastering the production technology of single-crystal turbine blades and aero engines will offer assured supply to the army and increase our fighter jets’ ability to withstand prolonged battles,” said retired PLA Navy (PLAN) Rear Admiral Xu Guangyu to the Global Times.

Notes & Comments:

The state-owned Aero Engine Corporation of China (AECC) is at the forefront of Chinese turbofan engine research, development and production efforts. However, as recently as this March, AECC’s Chen Xiangbao told the China Daily that the quality of Chinese single-crystal blades (when mass-produced) was “not very satisfactory.” However, Chen noted that the challenge was not insurmountable.

It is not known if CAST’s mass-produced single-crystal turbine blades are at-par with the quality-control requirements set by AECC. If this is not the case, then CAST will be unlikely to provide for China’s domestic military and civil aviation market (as most engines are sourced from AECC, which – if interested in CAST – would subcontract production work to that company).

That said, it would appear that Chinese private sector players are making relatively rapid strides in offering marketable products. Granted, the means vary. For example, the Chinese company Skyrizon has partnered with Ukraine’s Motor Sich to assemble and sell the latter’s various engine designs in China, including the AI-222 turbofan, D-27 propfan, MS-500V turboshaft and others.[1]

Regarding CAST, it should be noted that its parent company is also involved in purifying rhenium, which is an essential rare earth metal for producing single-crystal blades.

Please provide a link and credit the website from where you got this.

 

[Dr Shaheryar]

http://www.globaltimes.cn/content/1064508.shtml

 

[Sinnerman108]

Single crystal blades are not "mass produced" in the usual meaning of the word.

 

[Gryphon]

FC-1 Two-Seater For Combat And Training, Maker Says

Bradley Perrett | Aerospace Daily & Defense Report
May 1, 2017

FC-1 two-seat prototype: Avic

BEIJING—The two-seat version of the Avic Chengdu FC-1 export fighter is a combat aircraft as well as a trainer, the state manufacturer says following the first flight.
Heavy redesign of the tail has been necessary to create the two-seater, presumably because, as Avic says, no such version was planned when the FC-1 was launched in 1999 as a joint project with Pakistan.
The FC-1 is called JF-17 Thunder by the Pakistan Air Force, which Avic says has taken delivery of more than 80 units. Avic gives no designation for the new version, but “FC-1B” can be assumed; Pakistan calls it the JF-17B. Pakistan Aeronautical Complex is the joint manufacturer.
The FC-1 is powered by the Klimov RD-93 of 18,300 lb. thrust, though the comparable WS- 13 from the Guizhou works of Aero Engine Corp. of China has reportedly been tested in the airframe.
Avic says it developed the two-seat version in response to demand from Pakistan and the international market for a trainer.
Beyond training, the FC-1B “can exploit the ability of a two-person crew to handle complex combat conditions,” Avic says. “It has a stronger combat capability” than the single-seater, the state aeronautics conglomerate says in a statement published by various state media organizations.
As if to underline the claim of combat capability, the first flight was conducted with air-toair missiles on the wing tips.
A fully combat capable two-seater would need its aft cockpit properly equipped for fighting, but Avic makes no mention of such a feature. It also does not refer to any contribution in the twoseat development by Pakistan Aeronautical Complex, which helped create the original version.
Design changes go beyond the necessarily major fuselage revision to accommodate a second seat and place it high enough for an instructor to see forward.
Since the canopy is higher than in the single-seat version, the dorsal spine behind it is much deeper and voluminous. The volume was evidently wanted, because the spine barely tapers; it is hardly shallower at the point where it reaches the tail fin. That volume will offset space occupied by the second seat, though repackaging must have been necessary.
With more area forward, the fin had to be enlarged and swept back to maintain aerodynamic balance. Chord at its root has been extended aft and the sweep of the leading edge has increased to more than 45 deg. The formerly slightly forward sweep of the trailing edge has been changed to a backward sweep.
Ventral stabilizers appear unchanged, possibly because their size was limited by the clearance needed for rotation.
The airframe has been strengthened and more composite material worked into the structure, says Sina, a web portal. Despite the addition of lighter material, the FC-1B is likely to be somewhat heavier than the single seater.
Flown by pilot Tu Jianchuan, the first FC-1B took off at Chengdu on March 27 before assembled Chinese and foreign dignitaries, the latter presumably including officers of the Pakistan Air Force.
Pakistan’s aircraft have accumulated 30,000 flight hours, Avic says.

FC-1 Two-Seater For Combat And Training, Maker Says | aviationweek.com

 

[mikkix]

How many jf 17 pakistan can produce in a year and does it also include production in China or both China and Pakistan is producing the plane simultaneously so how much plane each country is producing in a year?
Can someone tell me?

 

[fatman17]

How many jf 17 pakistan can produce in a year and does it also include production in China or both China and Pakistan is producing the plane simultaneously so how much plane each country is producing in a year?
Can someone tell me?

The target is 26 per year for PAF, plus any export orders given directly to PAC Kamra, eg: Nigeria order. orders can be also placed with China eg: Myanmar order. All proceeds are shared 50:50 being a JV.

 

[mikkix]

The target is 26 per year for PAF, plus any export orders given directly to PAC Kamra, eg: Nigeria order. orders can be also placed with China eg: Myanmar order. All proceeds are shared 50:50 being a JV.

So Paf n china both jointly produce max 26 planes per year. It will take too much time to achieve 250 planes as targeted by paf

 

[Windjammer]

 

[Chak Bamu]

So Paf n china both jointly produce max 26 planes per year. It will take too much time to achieve 250 planes as targeted by paf

What is the big hurry? Does Pakistan have an over-riding need & funds to induct 170 planes in whatever time-frame you have in mind?

 

[Windjammer]

Damn....where's the sky gone.

 

[LonE_WolF]

JF-17's Production

 

[ZAC1]

check the serials