The Pentagon on Monday awarded Pratt & Whitney a $1 billion contract modification for 28 F135 engines for F-35s. The contract includes about $365.5 million for 28 engines for the Air Force F-35A variants, along with six engines for Marine Corps F-35B variant, and four engines for Navy F-35Cs. In addition, the contract includes seven engines for international partners, 11 spare systems, and one training engine for the Air Force, according to the contract announcement. The engines are for the lot nine low-rate initial production contract of F-35s, with work expected to be complete in 2019.
Celebrating 100 Years of Liquid-Fueled Rockets
March 11, 2026
March 16, 2026, marks 100 years since Dr. Robert H. Goddard launched the world’s first liquid-fueled rocket. Over the past century, new and ever more capable liquid-fueled rockets have literally propelled humanity into space. Why liquid-fueled rockets?