This problem is common for all US Air Cobra modifications, but I will take up AH-1 TOW modification.
So.
Obat 12 USA
Unit 121 AH-1 TOW
Unit 120 AH-1 TOW
Size - 2 EW - 8
First, why the size is so small? In reality AirCobra is slightly bigger than MI-2, that got the in-game size of 3.
Plus a pile of weapons - TOW missiles, FFAR, 20-mm. cannon/2x7,62mm minguns and TI.
Second - EW is sky high. In reality Air Cobra is not so big chopper, there is simply not enough free space in it to carry such powerful EW system (almost on the level of B-52
)
Taking into consideration that B-52, sized 6 got EW system of 10, I can assume that Air Cobra should have EW somewhere around 4.