It's exactly what it sounds like... it's a weapon testing platform. It's used mainly for large weapons or mods. (Use dead weight to even the aircraft.) Sorry, dunno how to do trim. I did a bunch or of prototypes before. The aircraft is still under maintenance today. The plane also might have a series coming such as the aircraft having turbofan engines. The weight is uneven. Just a BIT off line but hey, you try mirroring a plane where the middle is only made of a slim fuselage covered by a thick wing. Yeah. I didn't think so. If you wanna have a little fun, try putting gun pods, bombs, and missiles under the plane. And before you ask the ever so obvious question... Whoa Mostly, where do you put the large, heavy ass weapon load? Simple. Put it under the center wing of the aircraft. That way, weight distribution is not on it's heels trying to not make you rage as your plane violently tips to the side. Did I mention the aircraft has a load of airbrakes.? Well, they do. Now enjoy, and happy flying!