J-15 Carrier Multirole Fighter thread


Bltizo

Lieutenant General
Staff member
Super Moderator
Are those fueling pipes?

If so, it may indicate that a few batch 3 airframes have already flown.
Those look like they go to the ventral side of the aircraft, with multiple tubes. I don't think they're for refuelling, but then again I don't actually know where they exactly refuel on a Flanker.

That said if the overall batch 3 J-15 production has been going on for months now then chances are some have already flown.



Given how limited our updates of SAC have been over the years, lots of milestones could have been made without us knowing about it.
 

Chish

Junior Member
Registered Member
Sorry, I just saw this,,, I'm NOT a fan of that green primer, same thing we see on those nasty old wheels, I like the yellow green mix, hopefully that will fade to the green we see on the verts, that is probably the case...
I take that you believe the green paint are just primer, no different from the yellow? There must be a reason to use different shades of green, as green is not a favorite color for the Chinese either. Maybe I am wrong?
 

Air Force Brat

Brigadier
Staff member
Super Moderator
I take that you believe the green paint are just primer, no different from the yellow? There must be a reason to use different shades of green, as green is not a favorite color for the Chinese either. Maybe I am wrong?
Yes, as others have pointed out the dark green is for composite skins, and the yellowish green is zinc-chromate, which inhibits corrosion. For what its worth, all the Cessna's manufactured in France, by Rhiems, were zinc chromated internally, to inhibit corrosion in the relatively moist environment of the European continent.

There is now a service bulletin to check for corrosion on Cessna 177 and Cessna 210 aircraft, after a 210 on pipeline patrol in Australia lost a wing, these are cantilever wing aircraft, and the "carry through spar" supports the wings without any external strut..

The loss of a wing was traced to failure of the center section/carry through spar due to pitting and cracking relating to ongoing corrosion and high time and high load factors...

the carry through spar on Dan's C-177 had some "snow flaking" which cleaned up nicely with a scotch bright pad, it is in fact in lovely condition for a 50 year old airframe....

In fact I gave Dan my last can of zinc-chromate for some clean-up and coating on the interior of his aircraft under the rear window internally where there was some light corrosion due to condensation....
 

Air Force Brat

Brigadier
Staff member
Super Moderator
Green primer means that section isn't aluminum. The yellow primer is zinc chromate, which is used as an aluminum primer.
Yes, and the primer on the wheels is actually a darker green finish type coating to inhibit corrosion, I'm rather certain the dark green for the carbon fibre skins is to inhibit damage by UV, and to encourage adhesion of the top-coat...
 

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