In lore the Partial Wing System was made in 3067 by Clan Jade Falcon. It would allow the using to glide 60 meters in the air. In the case of MWO however, all it would do is make you fall very slowly if you used jump jets and as a plus side, the Partial Wings would save you from fall damage. A Cougar XR inspired Legendary Mech would make an excellent testbed for the Partial Wing System.
Also PGI already has the assets from the Predator Booster Pack, so they reuse the wings:
