I've been fiddling around with trying to make a blended wing body aircraft. While modelling, I heard from someone that the design reminded them of the Swift Killer Bee (now Grumman Bat). One distinct feature that I noticed from the design of the Bat is their use of an inverted winglet. Does anyone know why the design features an inverted winglet rather than a conventional one? The more recent designs of the UAV also features a conventional winglet in addition to the inverted one. Are there any benefits for this design?
I would also like to know if anyone has an idea on how the UAV handles landing? Is the inverted winglet capable of supporting the stresses experienced during landing? I can only find that the Bat comes with an optional landing gear while normally it is supposed to be caught by a net.