Exact Pratt & Whitney F135-PW-600 STOVL turbofan variant in the canonical F135 family for the F-35B. Pratt & Whitney's STOVL fact sheet lists a 41,000-lbf (182.38 kN) maximum thrust class, 27,000-lbf intermediate class, 40,740-lbf short-takeoff class, and 40,650-lbf hover thrust class; the exact F-35B installation remains separately managed.