I'd like to submit one of my favorite planes; The FS-1 Kestrel, commonly known as Kestrel 1. I have been told the Kestrel is a very stable plane. It should (I say "should" because I've never had the patience to circumnavigate Kerbin with anything) have enough fuel, and good enough fuel efficiency to circumnavigate Kerbin. It requires upwards trim, but after that, it flies well. It has a pair of swept wings and the intakes on top are for weight and (obviously,) air intake. It has an Advanced Reaction Wheel because it was created in .19 and I never bothered to take it off, although it does help in some situations. Action Group 1 toggles the ladder. Download: FS-1 Kestrel