The F-35B lands like a Harrier and fights like a stealth jet—STOVL without compromise. (Credits: @zanelathrum on TikTok) Lockheed's F-35B combines a Pratt & Whitney F135 core with Rolls-Royce's shaft-driven LiftFan to deliver true STOVL stealth. The lift fan (50-inch diameter, two-stage, counter-rotating) generates about 20,000 lbf of cold thrust while the main engine provides the balance—together enabling short takeoffs and vertical landings with a fully stealthy airframe. Operationally, the B-

Lockheed Martin F-35 - As bad as Critics say? | MiGFlug.com Blog