Ultimate Biplane-0.jpg 43.1 KB · Views: 65 Nitro Planes 120R Ultimate Biplanes. Yet another Biplane in my stable modeled here for G3.5. O.S. FS-120 pumped engine. This variant requires: Ultimate Biplane from RealFlight G3 Reactions: WingDude, vonfife911, brian94066 and 3 others