Williams FJ33 Turbofan Engine Overview The Williams International FJ33 is a family of compact turbofan engines designed for very light jets (VLJs) and personal jet programs. Scaled from the widely adopted FJ44 series, the FJ33 brings modern turbofan efficiency to smaller airframes—delivering low weight, low fuel burn, and simplified maintenance in the ~1,000–1,900 lbf thrust … Continue reading Williams FJ33