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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.

Bayraktar Kızılelma top view of combat unmanned aerial vehicle.

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.

Lockheed SR-71 Blackbird flying over clouds. (Some graphics in this image is provided by NASA and can be found at http://www.nasa.gov/)

Close up of car exhaust chimney on gray sky background. Metal big vehicle truck tractor details.

Decommissioned Canadian Air Force aircraft.

Colorado Springs, Colorado, USA: United States Air Force Academy / USAFA - McDonnell Douglas F-15A Eagle on static display, McDonnell Douglas F-4 Phantom II in the background. This 1976 model F-15 flew most of its career with the 48th Fighter Interceptor Squadron (FIS) at Langley AFB, Virginia. The jet was painted in the colors of Tyndall AFB, Florida (TY), for its last few missions. The F-15 Eagle is a twin-engine air superiority fighter manufactured by McDonnell Douglas (part of Boeing since 1997). As the classification already implies, it was designed to establish and maintain air superiority. In this role, over time it almost completely replaced the F-4 Phantom II. The F-15 has now been superseded to some extent by the F-22 Raptor.

Moscow Russia AUGUST, 26, 2015 Dramatic image of the black silhouette of a Russian fighter plane in the sky. Copy space. Sukhoi Su-57 Felon stealth multirole fighter jet airplane of Russian AirForce

Telephoto view of jet flying overhead at an accelerated rate,

An extreme close view of the front nose of a military jet

A missile head on the wing of a fighter jet.

Dover, Delaware, USA - August 27, 2017: Rear, close-up view of the tail and engines of a U.S. Air Force B-1B Lancer bomber stationed at Dyess Air Force Base, Texas.

Fairford, Gloustershire , UK - July 18, 2009: RAF Typhoon jet fighter showing the detail engine exhaust of its twin jet turbines. Notice the single electronic warfare pod under its belly.

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.

Powerful jet engine powered by SAF Sustainable Aviation Fuel for eco-friendly air transportation

Bayraktar Kızılelma unmanned aerial vehicle gliding through the clouds.

$Mid-air refueling of an F-16 from the boom pod of a KC-135 Stratotanker. \n\nOther shots from this flight: \n[url=http://www.istockphoto.com/file_closeup.php?id=6694841][img]http://www1.istockphoto.com/file_thumbview_approve/6694841/[/img][/url] [url=http://www.istockphoto.com/file_closeup.php?id=6696278][img]http://www1.istockphoto.com/file_thumbview_approve/6696278/[/img][/url] [url=http://www.istockphoto.com/file_closeup.php?id=6697317][img]http://www1.istockphoto.com/file_thumbview_approve/6697317/[/img][/url]$

The exhaust of the fighter jet. Jet plane nozzle

Close-up of the twin jet engines of an aircraft, showing the exhaust nozzles and surrounding structure.

Beja, Portugal: EuroDASS Praetorian DASS - this defensive Aid Sub-System (DASS) provides threat assessment, aircraft protection and support measures in extremely hostile and severe environments. The Praetorian system is a modular system consisting of antennas for electronic countermeasures (ECM), electronic support measures (ESM), missile approach warning systems (MAW), laser warning receivers (LWR) and Towed radar decoy (TRD) - portside wingtip of a Eurofighter Typhoon - electronic warfare (EW) - Beja Airport, photo obtained in a public area.

rear quarter view of Boeing KC-135 multirole tanker aircraft engine.

Bayraktar Kızılelma Combatant Unmanned Aircraft System (CUAS).

Free Images: "bestof:YF-23 exhaust.jpg en YF-23 exhaust http //www nationalmuseum af mil/factsheets/factsheet asp id 7152 National Museum of the United States Air Force 2008-09-04"

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