Well thanks for correcting me, then its use for strengthening the plane. Whether you think its design for LO, you can see the Global Hawk and notice its nothing like the LO of the RQ 170 or the RQ 180 as some call for the other drone for stealth recon.I’m under the impression Composite material used in wings is for strength not for “light weight purposes” of the passenger plane. That is why you can see these wings take insane pressures and not break.
Composite material does indeed reduce weight, but more importantly radar against composite material reacts completely different than against metals and alloys object.
In a smaller military object (note not passenger plane) it’s use is to reduce radar reflection and at the same time reduce weight as an added benefit.
Time index: 2:20.