EMMANUEL • AVIATOR • SCHOLAR • LIFESTYLE on Instagram: "The General Electric TF39 was the first high-bypass turbofan engine in the world. Developed in the 1960s specifically for the U.S. Air Force’s new heavy airlifter, the Lockheed C-5 Galaxy. Its design later became the foundation for the civilian GE CF6 series (used on DC-10, A300, 747, etc.). ⚙️ Key Specs (TF39-1C on C-5A/B) • Thrust: ~43,000 lbf each • Bypass ratio: ~8:1 (huge for its time — most engines then had ~1–2:1) • Overall pressure