F136 engine

F136 engine is a turbofan engine developed by General Electric and Rolls-Royce plc for the Lockheed Martin F-35 Lightning II aircraft, also known as the Joint Strike Fighter (JSF) program. The F136 engine was designed to provide an alternative to the Pratt & Whitney F135 engine, which is also used in the F-35 Lightning II. The development of the F136 engine involved collaboration between General Electric Aviation and Rolls-Royce Defence, with support from the United States Department of Defense and the UK Ministry of Defence. The program also received funding from the US Air Force, US Navy, and the Royal Air Force.

Introduction

The F136 engine was part of the Joint Strike Fighter (JSF) program, a multinational project to develop a fifth-generation fighter aircraft, led by Lockheed Martin and involving partners such as Northrop Grumman, BAE Systems, and Boeing. The F136 engine was designed to meet the requirements of the F-35 Lightning II, which includes short takeoff and vertical landing (STOVL) capability, as well as conventional takeoff and landing (CTOL) and carrier variant (CV) configurations. The engine was also intended to provide a high level of reliability, maintainability, and supportability, as outlined in the US Department of Defense's Acquisition Streamlining initiative. The development of the F136 engine involved collaboration with other companies, including Honeywell International and Goodrich Corporation, now part of UTC Aerospace Systems.

Design and Development

The F136 engine features a high-bypass turbofan design, with a fan driven by a low-pressure turbine and a core consisting of a high-pressure compressor and a high-pressure turbine. The engine also includes a reheat system, which provides additional thrust for supersonic flight, as well as a thrust vectoring system for enhanced maneuverability. The F136 engine was designed to meet the requirements of the F-35 Lightning II, including the ability to operate in a variety of environments, from the deserts of Iraq to the mountains of Afghanistan. The engine was also designed to be compatible with the F-35's advanced avionics and flight control systems, developed by companies such as Rockwell Collins and BAE Systems. The development of the F136 engine involved testing and evaluation at facilities such as the US Air Force Test Center at Edwards Air Force Base and the Royal Air Force's QinetiQ test facility.

Specifications

The F136 engine has a thrust-to-weight ratio of approximately 7.5:1, with a maximum thrust output of over 22,000 pounds-force (98 kN). The engine features a bypass ratio of 0.57:1 and a pressure ratio of 28:1. The F136 engine is designed to operate at temperatures ranging from -40°C to 120°C (-40°F to 248°F) and at altitudes up to 50,000 feet (15,240 meters). The engine is also designed to be compatible with a variety of fuels, including JP-8 and Jet-A1, which are commonly used by the US military and the Royal Air Force. The F136 engine's performance is comparable to other advanced fighter engines, such as the Pratt & Whitney F119 and the Eurojet EJ200, used in the Lockheed Martin F-22 Raptor and the Eurofighter Typhoon, respectively.

Operational History

Although the F136 engine was not ultimately selected for production, it was tested and evaluated extensively during the development phase. The engine underwent ground testing at facilities such as the General Electric test facility in Cincinnati, Ohio, and the Rolls-Royce test facility in Derby, England. The F136 engine was also tested in flight on the F-35 Lightning II aircraft, with the first flight taking place in 2010. The engine was evaluated by pilots from the US Air Force, US Navy, and the Royal Air Force, who praised its performance and handling characteristics. The F136 engine was also demonstrated at airshows such as the Farnborough Airshow and the Paris Air Show, where it was showcased alongside other advanced military aircraft, including the Dassault Rafale and the Saab JAS 39 Gripen.

Cancelation and Legacy

The F136 engine program was canceled in 2011 due to funding constraints and the US Department of Defense's decision to focus on the Pratt & Whitney F135 engine. Despite the cancelation, the F136 engine program contributed significantly to the development of advanced engine technologies, including composite materials and advanced cooling systems. The program also demonstrated the feasibility of international collaboration on complex engineering projects, involving companies such as General Electric, Rolls-Royce, and Honeywell International. The F136 engine's legacy can be seen in other advanced engine programs, such as the Adaptive Engine Technology Development (AETD) program, which aims to develop a new generation of adaptive engines for future military aircraft, including the US Air Force's Next Generation Air Dominance (NGAD) program and the Royal Air Force's Tempest program. The F136 engine's technology has also been applied to other areas, such as the development of advanced turboshaft engines for helicopters and turboprop engines for transport aircraft, including the Lockheed Martin C-130J Super Hercules and the Boeing C-17 Globemaster III. Category:Aircraft engines