Is it feasible to add on conformal fuel tank on J-7G??

Kilo636

Banned Idiot
cabbageman said:
You cannot drop CFT. So you would be trading combat performance and upgrade cost for range and two extra AAMs. For CAP missions, CFT probably increase endurance from 40 min. to about 1 hr. Nice to have, but a low priority considering Su-27s and J-10s could probably CAP for 2~3 hrs at longer range anyway. Two extra IR AAMs doubles target engagement of J-7, but does that really improve the overall combat effectiveness against potential enemies?

Probably yes!! Adversary flare and ECM will usually negat yr first shot of yr IR AAM or u fire 2 IR AAM target at a single target to ensure high kill probability meaning u will ran out of AAM missile in a single sortie for 1 enemy which is too low!
 

sumdud

Senior Member
VIP Professional
There are several MiG-21 upgrade packages on the market, MiG-21-2000, MiG-21 Lancer, MiG-21-93 (Bison), etc. China also makes many MiG-21 upgraded variants.
China's Fishbeds originated from the 1st Fishbeds found in this world, which has smaller nose, radar, slimmer backbone, which has different dimensions and is different from the later models, like bis, and those that India have.
I would doubt that the mentioned above upgrades are that easy or feasible for Chinese Fishbeds.

The J-7 was built as a defensive fighter, not much need for range. Being able to do a 850km radius is pretty good.
The J-7 is a small plane however, so adding CFTs might mean a major change in shape...
 

adeptitus

Captain
VIP Professional
ahho said:
those tank look like the one that are used for the F-16.
i got a few questions

1) the belly hardpoint, can they mount missile in there or only bombs and drop tank.

2) can you mount bvr missile on the j-7g but for other plane to launch it like flankers, fc-1, j-10 (awacs???)

3) i am wondering if anyone have though about using the belly hardpoint to mount a radar to launch bvr missile???


1) Most MiG-21's use centerline pylon for 450 liter fuel tank only. Very rarely is the centerline pylon used for anything else.

2) I'd point to India's MiG-21-93 Bison upgrade, which include the Kopyo PD radar and ability to use R-77 BVR missiles.

3) Not necessary (see #2).

=====

Also, if you look at MiG-21-Bis photos such as these:
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You'd note that even the outer wing pylon is cleared to take pretty large sized fuel tanks. If they can take those, they should be able to carry light air to ground missiles too, assuming if you have the radar and fire control system to use it.
 

ahho

Junior Member
adeptitus said:
1) Most MiG-21's use centerline pylon for 450 liter fuel tank only. Very rarely is the centerline pylon used for anything else.

2) I'd point to India's MiG-21-93 Bison upgrade, which include the Kopyo PD radar and ability to use R-77 BVR missiles.

3) Not necessary (see #2).

=====

Also, if you look at MiG-21-Bis photos such as these:
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You'd note that even the outer wing pylon is cleared to take pretty large sized fuel tanks. If they can take those, they should be able to carry light air to ground missiles too, assuming if you have the radar and fire control system to use it.

what you are talking about is the India's mig21, right now i am talking about the chinese J-7g which has no BVR capability
 

adeptitus

Captain
VIP Professional
ahho said:
what you are talking about is the India's mig21, right now i am talking about the chinese J-7g which has no BVR capability

Since this capability has already been demonstrated by India's MiG-21-93 upgrade, I think it's technically feasible for the J-7G too. Even Singapore F-5T can be upgraded to use the AIM-120.

So we have to explore on why it isn't done. From observation, I think sometimes aircraft upgrade programs are axed because they don't want it to compete against another, newer aircraft.

We could speculate that the PLAAF doesn't want upgraded J-7's with BVR or FC-1 because they want the allocate limited resource/funds to the J-10...
 

sumdud

Senior Member
VIP Professional
Yes, but the F-5Ts didn't get a major physical refit, did it? I doubt it is feasible to enlarge the J-7E/G into something the size of J-7C/Ds. (Isn't the Bison, MiG-21-2000 and Lancer all larger than the J-7s in China?) Perhaps it can be done to the J-7C/Ds in Chinese service?
 

Wingman

Junior Member
2) can you mount bvr missile on the j-7g but for other plane to launch it like flankers, fc-1, j-10 (awacs???)
Elite-Pilot said:
2) no, it is just simpy not possible. The aircraft need to see the target itself. However the aircraft can data link to the Awacs.

That's a very unconventional method but I don't think it's impossible. You just need to reprogram the missile to accept mid-course corrections from another aircraft instead of its parent aircraft. Have the other aircraft spot the target then he'll tell the J7 to prickle, then the missile shifts control to the other aircraft for mid-course guidance. Fighter-fighter datalink will work too
 
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Raven

New Member
Conformal fuel tank

Conformal tanks are interesting but I have never really known anyone who followed them. I have talked to F15E crews a number of times but never asked them about the penalties they suffere compared to clean F15s.

I will say that all of the US Tactical fighters are equipped with IF refueling, be it the larger and complex "flying boom" system or the more compact but demanding "hose and drogue" system used by NATO and the US Navy/Marine fighters.

One benefit over IFR that a comformal tank gives is a smaller need for heavy tanker support. Huge tankers floating in long orbits attract attention. The use of conformal makes a strike aircraft more independent, meaning it is more stealthy. I'll ask around and see if anyone can give me info on them.
 
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