JF-17 Block-3 -- Updates, News & Discussion

[Syed1.]

As a mech engineer, having liquid cooled radars does not make sense to me. Liquid cooling will make the radar heat exchangers bulky, plus then you have to find means of dispelling the heat within the liquid to the air to complete the cycle. On the flip side an air cooled radar would make more sense, since the one thing that any plane has abundant supply of is fast moving cold air. The heated air can be discharged and replenished with new air without having the need to remove the heat from the air. The only advantage of a liquid cooled system is that it is thermally more efficient. Perhaps there are other considerations in a jet that I'm missing.

 

[Ultima Thule]

medium category bird means a bigger cross section which we don't want. Having a bird with a relatively small cross section that the best of enemy radars can't see until the bird itself is within the range of shooting down the enemy is an ace we wanna keep in our sleeves.

F-16 is medium bird but its RCS is 1m2 with air to air load out, same goes F/A-18 E/F, its not about bigger and smaller but its matters plan-form alignments to reduce RCS, for Example F-15 and F-22 have same lengths 63 feet But one jet has a RCS of 25m2 (F-15) and other has 0000.1 (metal marble plate, F-22), and also bro most of the modern jet uses composite material to reduce their RCS further (carbon reinforce plastic/ Carbon fibers) @GumNaam

What, what? So blk 3 is with equipped with a liquid cooled AESA KLJ-7A radar while blk 1 & 2 are gonna be equipped with an air cooled KLJ-7A AESA radar? How many versions of KLJ-7A radars are there anyway???

LFK601 is not version of KLJ-7A and its develop by different institute by China @GumNaam

 

[SQ8]

Initial batches will still be carrying passive scanning. Active electronics needs significant inhouse solution at the moment. The power plant with idle max thrust to idle max weight ratio reported >1. @Oscar

Electric cooling was the pathway looked at. There is an innovative solution pioneered by our collaborators with two phase cooling using less power.

 

[aliyusuf]

It's hard to find thunder like catching a bee and bites like a dog, it wouldn't let you go

Is it difficult to find because it has a low RCS? Especially the frontal RCS?

 

[Globalwarrior]

I think PK lags in technical and radar know how and therefore without Chinese input this plane would not have taken off. Therefore I’m not sure how much credit PAF can take for this.

 

[Ultima Thule]

I think PK lags in technical and radar know how and therefore without Chinese input this plane would not have taken off. Therefore I’m not sure how much credit PAF can take for this.

JF-17 Project start new era to develop/learn independent R&D/manufacturing industries in Pakistan

 

[Aizad Hussain Sayid]

What is the current status of Block 1 and Block 2 Thunder regarding integration with Chinese medium range BVR missiles (SD-10/PL-12)? Has it been integrated with all Pakistani aircraft yet?

Secondly, is there any status report on PL-15 integration with current inventory of JF-17 or will that possibly be reserved only for the 50 or so Block 3 aircraft?

 

[Super Falcon]

Pakistan airforce has missed few thing a irist system on thunder was required and new medium range missile which thunder dont have we need more missile package

 

[BATMAN]

This week, PAC hasn't sent any report.

 

[Jinn Baba]

Just go to the JF17 thread - theres plenty of information there and you can raise this any queries there.

 

[Aizad Hussain Sayid]

Pakistan airforce has missed few thing a irist system on thunder was required and new medium range missile which thunder dont have we need more missile package

We aren't using SD-10 on any JF-17?

 

[pkd]

https://twitter.com/x/status/1168129188160823296

 

[Ultima Thule]

https://twitter.com/x/status/1168129188160823296

wrong , PL-15 has a range of 150-200 km and comparable to AMRAAM C-7 as per various estimates and specification provided by various Chinese friends here on PDF @pkd

We aren't using SD-10 on any JF-17?

Yeah but SD-10 is long range BVR not Medium range like sky flash/Aspide/AIM-7/R-27/PL-11 @Aizad Hussain Sayid

 

[Alpha BeeTee]

As a mech engineer, having liquid cooled radars does not make sense to me. Liquid cooling will make the radar heat exchangers bulky, plus then you have to find means of dispelling the heat within the liquid to the air to complete the cycle. On the flip side an air cooled radar would make more sense, since the one thing that any plane has abundant supply of is fast moving cold air. The heated air can be discharged and replenished with new air without having the need to remove the heat from the air. The only advantage of a liquid cooled system is that it is thermally more efficient. Perhaps there are other considerations in a jet that I'm missing.

Probably you'll need a lot more heat transfer surface area (which means a lot more space might be required even if fins are used) if you want the entire heat transfer through air. Whereas, liquid heat transfer might be more thermally efficient (as you mentioned) in lesser space.

 

[SQ8]

As a mech engineer, having liquid cooled radars does not make sense to me. Liquid cooling will make the radar heat exchangers bulky, plus then you have to find means of dispelling the heat within the liquid to the air to complete the cycle. On the flip side an air cooled radar would make more sense, since the one thing that any plane has abundant supply of is fast moving cold air. The heated air can be discharged and replenished with new air without having the need to remove the heat from the air. The only advantage of a liquid cooled system is that it is thermally more efficient. Perhaps there are other considerations in a jet that I'm missing.

Look at dual phase cooling; smaller size for same efficiency.