Engines
SyberJet Selects Williams FJ44-4A for SJ36 Light Jet
Trevor Milton, Gregg Williams ink deal at NBAA-BACE 2025
Gregg Williams and Trevor Milton shake hands on engine deal
Gregg Williams, Williams International, shakes hands with Trevor Milton, SyberJet, after inking engine deal for SJ36. © Amy Wilder

SyberJet Aircraft and Williams International have entered into an exclusive engine partnership to power SyberJet’s next-generation light jet, the SJ36. Under a deal inked on Tuesday afternoon at NBAA-BACE 2025, the agreement designates Williams’ FJ44-4A as the twinjet’s powerplant.

Each FJ44-4A engine will provide 3,621 pounds of thrust, for a combined total of more than 7,200 pounds. With a projected mtow of 18,500 pounds, the light jet will achieve a 0.389:1 thrust-to-weight ratio, enabling strong climb performance and efficient high-altitude cruise SyberJet said. The SJ36’s four-foot shorter predecessor, the FAA-certified SJ30-2, was fitted with two 2,300-pound-thrust FJ44-2A turbofans.