The likely possibility is that the EMALS lacks the magnetic power to pull the weight in which the magnetic attraction is disrupted by the amount of mass it was trying to tug since there is no physical connection, the tolerance of weight is quite strict and will fail even with an extra Kilo.
If they provide more electric power to the magnets it should solve the problem.
Gentlemen, read the article, the EMALS is "over-stressing" the aircraft equipped with external fuel slung on pylons. The fuel on the end of the Pylon needs to be accelerated at a much lower rate, in order not to overstress the wing. As the aircraft is accelerated at a very high rate, the heavy fuel resists that acceleration, that force tends to rotate around the aft attach point of the pylon to the wing, overstressing the front mount with a down-ward/rear-ward stress caused by that very heavy fuel tank acting at the end of that long moment arm.
This downward/rearward force moment exerts extreme stress on the front of the pylon at the wing and fuel tank attach points, and exerts a downward twisting moment on the wing and the spar trying to pull the wing leading edge down and back, resulting in a twisting moment that the wing does NOT like, even losing that front fuel tank mount will result in a catastrophic failure right at rotation.
The solution is real simple and the EMALS forte, you dial the acceleration back, as the EMALS has more than ample force to launch the fighter aircraft, as well as the heavy CODS. Once you have that fuel moving and accelerating then you can sling that puppy off the deck without undo stress. The EMALS will be much easier on all aircraft due to that very nature having excess force that you can tune to your application!
and YES, IT IS ROCKET SCIENCE! really it is, very snarky kool, but its a whole new field to understand, develop, and employ in the field? The main reason I think it would border on foolish for the Chinese to try to jump into this on their first indigenous carriers, but hey, who asked me?
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