This Bell model 301 tilt-rotor first flew in May 1977 and later developed into the V-22 Osprey. Only two prototypes were ever built, and the model is frequently called the XV-15 (the “X” designating “experimental”). In the digital rendering of my model here on mocpages, I replicated the color scheme of the second prototype aircraft which NASA acquired (see picture below). My design here of the XV-15 is 282 Lego elements, and the engines / rotors on the tips of the wings tilt up (as shown in 'helicopter' mode) or forward (in 'airplane' mode).
To understand my modeling goals and past projects, visit my homepage! Thanks for looking, comments welcomed.