The Blohm + Voss BV 40 was a glider fighter designed to attack Allied bomber formations.

Its key features were a very narrow (and thus hard to hit) cross section as result of being a glider, a fairly heavily armored cockpit, and two MK 108 cannons with very limited ammunition. The body was constructed almost entirely of wood, a non-strategic material. During its short attack time the glider would fire its weapon, then glide back to earth. The first flight was in the May of 1944. Several prototypes were completed but the project was stopped later in the year as the end of the war drew near.