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Auxiliary power plant in the tail of the aircraft with open hood covers
Adjustable exhaust nozzle with partly expanded diffusers - a variable area nozzle is required in a jet engine for optimal expansion and adjusting back pressure in the engine when the afterburner is operated, it avoids compressor surge problems due to the increased back pressure on the engine when the afterburner is lit - engines capable of supersonic flight have convergent-divergent exhaust duct features to generate supersonic flow - GE F110 afterburning turbofan jet engine on F-16 fighters - empennage close-up of exhaust and elevator.
Industrial gas turbine. Equipment for energy industry. Gas turbine during repair. Industrial technologies. Gas turbine for compressor station. Repair and maintenance of fuel equipment
Jet aircraft engine in the hangar
Turboprop engine of P-3C Orion on static display at Portland Jetport.
Rebuilt, aircraft gas turbine engine on stand.
old shovels of a turbine - photo
Decommissioned Canadian Air Force aircraft.
Tucson, Arizona, USA - March 25, 2023: The nose of an F-86 Sabre on display at the 2023 Thunder and Lightning Over Arizona airshow.
Lisbon, Portugal: boxed aircraft auxiliary power unit (APU) - the APU is a small turbine engine that provides air and electricity, no hydraulics, but electricity and air can run hydraulic pumps. APUs are typically located in the tail cone of the aircraft, but they can also be located in the engine nacelles or in the wheel wells. APUs can be started using either the aircraft's batteries or a ground power unit (GPU). Once the APU is running, it generates electrical power through a generator. APUs are also used by some airlines to reduce fuel consumption. For example, some airlines use the APU to power the aircraft's air conditioning system on the ground, instead of using the main engines. This can save fuel, as the main engines are more fuel-efficient when they are running at higher speeds - Lisbon Airport, aka Humberto Delgado airport.
Duxford, Cambridgeshire, UK - June 26, 2005: Concorde Supersonic Aircraft, showing detail of tail starboard engine exhaust section. This was an experimental Concorde used by both Britain and France.
CFM56Jet Engine as used on A320 and 737
Underbelly of a  jet airplane.
Jet engine inside
Checking small airplane
Inside the Rolls Royce Trent 800 Engine, this engine is designed for Boeing 777 aircraft.
Beja Airport, Portugal: sonar buoys chutes - sonobuoys are used in anti-submarine warfare and submarine rescue - there are two main types, active buoys send out sonar pulses, which reflect off of the submarine, and the return is datal inked back to the aircraft, passive buoys listen for any radiated noise from the submarine contact -  hydrophone sensors and stabilizing equipment are below the water surface, the buoy relays acoustic information from its hydrophone via UHF/VHF radio to operators on board the aircraft - Lockheed P-3 Orion aircraft, a military derivative of the Lockheed L-188 Electra. Image obtained in a public non ticketed area.
Close-up of aircraft engine in aerospace industry
Jet Aircraft Engine
Shot of an airplane turbine on display
Wide angle image of mechanical engineering in Aeronautics. Belonging to a Euro-fighter Typhoon.
Side view of an old air craft jet engine without its covers
A propeller-driven, four engine airliner built by Lockheed Corporation in 1943.  The first pressurized cabin civil airliner.
Colorful car internal combustion engine
October 6- Naha, Okinawa, Japan: Naha is the capital of Okinawa and the US military base is located here. Here are the military airplanes of Japan Air Self-Defense Force.
Fighter jet nose and air intake
Military airplane at the Woomera National Aerospace and Missile Park, located in the centre of the village of Woomera, South Australia. This park features missiles and rockets that were developed and tested at Woomera over the last 60 years, as well as a number of aircraft which were used in trials.
Closeup of an old Sikorsky H-34G Helicopter
Beja, Portugal: Lockheed Martin Sniper Advanced Targeting Pod (ATP), AN/AAQ-33 - mounted under the fuselage of a F-16 Fighting Falcon - electro-optical targeting system used for precision targeting and intelligence, surveillance and reconnaissance (ISR) air-to-air and air-to-ground missions in the land, sea, and air domains -  Base Aerea 11.
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