Rabu, 18 November 2009

The B-2 Spirit Stealth Bomber

The B-2 Spirit Stealth Bomber
During the late 1940s and early 1950s, Jack Northrop of the Northrop company worked on a series of flying-wing bombers, none of which actually reached production. However, they did attract a great deal of public attention, being seen as futuristic, and were even featured in science-fiction movies such as THE WAR OF THE WORLDS.

A few decades later the notion that the future belonged to the flying wing seemed laughable, but Northrop had the last laugh. Radar had trouble picking up the uncluttered lines of a flying wing, and as the US Air Force turned towards "stealthy" aircraft in the 1970s and 1980s, the flying wing bomber was revived in the form of the Northrop Grumman "B-2 Spirit", the first flying wing to enter full operational service, the biggest stealth aircraft built to date, and one of the most expensive aircraft ever made.

A bomber is a military aircraft designed to attack ground targets, primarily by dropping bombs.
Types
  • Strategic bomber aircraft designed for long-range attack missions, targeting strategic targets such as supply bases, bridges, factories, and ports to reduce the enemy's fighting ability.
  • Tactical Bomber is a smaller plane with a distance shorter range, typically as far as the position of ground troops, because the goal was to support ground troops. In the modern environment, any war plane that was not designed as a strategic bombers can fall into this category. This role is filled by many designs, including those written below.
  • Ground attack aircraft (or aircraft close support) is designed for round the battlefield and attack tactical targets, such as tanks, troop concentration, and others.
  • Fighter-bombers (also called tactical fighter and attack aircraft) is a fighter with many roles, which can be armed to attack air-to-air and air-to-surface missiles. Many of these types of aircraft designed for combat air immediately after the bomb dropped. Multi-role aircraft like this is also designed to save expenditure of funds.
The B-2 Spirit Stealth Bomber Described

The B-2 is organic in appearance, a simple flying wing, with absolutely no vertical control surfaces. It has very smooth contours and few features that could "catch" radar waves and reflect them. It has a sweepback of 55 degrees and a "W"-shaped trailing edge. The aircraft is aerodynamically unstable, kept in the air with a quadruple-redundant fly-by-wire (FBW) system, under the control of a General Electric Flight Control Computer (FCC).

The B-2 was designed to be survivable, not merely in penetrating enemy airspace and performing attacks, but in riding out enemy nuclear attacks or counterstrikes. The B-2 is thoroughly radiation hardened; Waaland commented that about all that isn't radiation hardened is the antiskid braking system. It can also operate from dispersed bases, one of the design criteria being the capability to use any airstrip capable of supporting a Boeing 727 airliner.
The B-2 makes heavy use of titanium for structural elements, with much of the rest of the aircraft built of carbon-reinforced plastic (CRP) material. Large CRP skin assemblies were used to make the aircraft as "seamless" as possible, reducing radar reflections. The principle of seamlessness also meant that the number of access panels was minimized as much as possible, reversing the trend of the past decades to provide maximum maintenance access. Maintenance access was mostly provided through absolutely essential apertures, such as the bombbays and crew boarding hatch. There are also no drain holes, with drainage flowing into collectors that are emptied on the ground.

Designing the CRP assemblies, tooling up for their production, and fitting them in place in aircraft manufacture was a major engineering challenge. Special heat-resistant CRP formulations are used around engine exhausts and other hot spots, where carbon-reinforced epoxy simply wouldn't do. The aircraft was initially coated with a conductive elastomer material to ensure that it had uniform electrical conductivity. This material was not actually RAM, but RAM was used selectively where needed. The B-2 is painted in a bluish-gray anti-reflective paint to reduce its visual signature. It is not painted black, as is the F-117, since the B-2 is expected to perform both daylight and night attacks, and black is a high-visibility color for daylight flight operations.

The leading edge of the wing has an internal structure that helps it absorb radar energy. The outermost wing segment features a "rudderon" or "deceleron", a vertically-split airbrake / rudder that simultaneously opens up and down. To act as an airbrake, both the decelerons are opened, while to act as a rudder only one is. This gimmick goes back to the original Northrop flying wings. There is an elevon inboard of the deceleron on the outermost segment of each wing, and then two elevons further inboard, on the next segment. Finally, there is a single control surface for pitch control on the "beavertail" at the center end of the aircraft, giving a total of nine control surfaces.

The decelerons have to be opened about five degrees before they are effective, and in normal cruising flight they are left slightly open. However, this undermines stealth, so when the bomber is in combat, it uses differential engine operation for yaw control.
B-2 Spirit powerplants

The B-2's four General Electric F118-GE-110 non-afterburning turbofans, providing 84.56 kN (8,620 kgp / 19,000 lbf) of thrust each, are derived from the popular GE F110 engine. The F118s are buried in the wings, with two engines clustered together inboard on each wing. An AlliedSignal auxiliary power unit is fitted on the forward end of the left engine assembly for engine starting and ground power. The B-2 also features a built-in Halon engine fire extinguishing system.

The engine intakes and exhausts are on the top of the wings for concealment. The intakes have a zigzag lip to scatter radar reflections, and there is a zigzag slot just before each intake to act as a "boundary layer splitter", breaking up the stagnant turbulent airflow that tends to collect on the surface of an aircraft. The inlet ducts are built as an s-curve and lined with RAM to keep radar from picking up the compressor blades.

The exhaust is mixed with airflow obtained through the boundary layer splitter slot to reduce the infrared signature. The aircraft was also designed to eliminate its contrail, with a tank outboard of the main landing gear to store a chemical that would be mixed with the exhaust flow to suppressed the formation of a contrail. This scheme wasn't actually used in practice, with a "lidar" (laser radar) system instead eventually developed to detect the formation of a contrail and alert the pilot to descend to lower altitude.

The B-2 has tricycle landing gear, with twin-wheel nose gear and four-wheel bogey systems for the main gear. The main gear is built by Boeing and is derived from that used on the Boeing 767 airliner. The landing gear doors have stealthy zigzag leading and trailing edges. Since it is difficult to find a place on the smoothly-contoured airframe to paint such "display" items as the aircraft name or serial number, they are painted on the main gear outer doors, making them visible to onlookers when the aircraft is on the ground, or during takeoff and landing. There is a boom-refueling port in the center of the back, which is normally covered by doors and pops up when needed.

The bomber is fitted with two side-by-side weapons bays that can accommodate a total of 22,680 kilograms (50,000 pounds) of stores. The leading and trailing edges of the weapons bay doors have the classic stealthy zigag pattern. When the doors are open, twin grilles pop out into the airstream at the front of the weapons bay to ensure proper stores separation. Each of the two weapons bays can be fitted with a Boeing Advanced Rotary Launcher (ARL), each capable of carrying eight 1,000 kilogram (2,200 pound) class munitions, or a Bomb Rack Assembly (BRA) for carriage of smaller munitions.

Since the B-2 was originally designed for the strategic bombing role, it was qualified initially for nuclear stores such as the B83 strategic nuclear bomb, with selectable yield in the megatonne range, and the smaller B61 "Silver Bullet" nuclear bomb, with selectable yield in the range of hundreds of kilotonnes. The bomber was later qualified for the penetrating B61-11 penetrating nuclear weapon. A B-2 can carry 16 nuclear stores.

The B-2 has also been qualified for use with "dumb" bombs, such as sixteen 900 kilogram (2,000 pound) bombs, or eighty 225 kilogram (500 pound) bombs or cluster munitions based on the Tactical Munitions Dispenser (TMD). However, such stores are likely better carried by other platforms such as the B-52 or B-1B, and so the emphasis with the B-2 has been on precision-guided weapons. Some sources claim it can also carry the AGM-84 Harpoon antiship missile for maritime strike, but it seems more likely that this was simply listed as a potential store as a political expedient to emphasize additional roles for the B-2.

A Global Positioning System (GPS) guided bomb, the "GPS Aided Munition (GAM)", was developed on a fast-track basis for the B-2, but GAM was strictly an interim solution until the real solution, the "Joint Direct Attack Munition (JDAM)", was introduced in the late 1990s. JDAM is a 900 kilogram bomb fitted with gliding strakes and GPS guidance; kits are now in development for 225 kilogram bombs as well. The B-2 can also carry the new AGM-154 Joint Stand-Off Weapon (JSOW) glide bomb, and the AGM-158 Joint Air to Surface Standoff Missile (JASSM).

The B-2 is highly automated and only requires two crew. A centerbody provides crew accommodation, with crew access through a hatch in the belly. The cockpit has large windows, so large in fact that they tend to make the B-2 look smaller than it really is, though the downward view is poor. Fighter pilots taking the controls of the B-2 say it makes them feel like they are "flying in a dumpster". A fine wire mesh is built into the windows to block radar signals.

The two crew sit side-by-side on ACES II zero-zero (zero speed, zero altitude) ejection seats, which blast through frangible roof panels. The "mission commander", who handles navigation and weapons delivery, sits on the left, while the pilot sits on the right. The mission commander is also a rated pilot and can fly the aircraft if need be. They control the aircraft using a "glass cockpit", with each crew using a dashboard featuring four 15 centimeter (6 inch) color CRT multifunction displays (MFDs) and a fighter-style control stick. There was provision for a third seat in case the crew workload proved too high, but a third crewperson proved unnecessary. A chemical toilet and rollup mattress can be carried for long missions. It is unclear if there are other conveniences, such as a small refrigerator or microwave oven.

The B-2's original "Navigation Sub-System (NSS)" included a Kearfott Inertial Management Unit, and a Northrop NAS-26 "Astro-Inertial Unit (AIU)", which obtains position fixes using a telescope to lock on to star positions, using a noticeable port on top of the wing off to left side of the cockpit. It works even in daylight when the bomber is at high altitude, and is a descendant of an AIU developed for the SR-71.

The B-2 is fitted with an AN/APQ-181 radar, with some similarities to the AN/APG-70 used on the F-15E Strike Eagle fighter. The AN/APQ-181 is a Ku band (high microwave, from 12 GHz / 3 centimeters to 18 GHz / 2 centimeters) radar, with an electronically steered antenna in the lower leading edge of each wing. The Ku band suffers from greater atmospheric attenuation than lower frequency bands, but it also provides very high resolution for navigation and targeting.

The AN/APQ-181 provides "low probability of intercept (LPI)" operation, with the radar dancing over frequencies and changing pulse patterns so that its signals can't be picked out of background noise until it's too late. Apparently the Tacit Blue program did much to advance LPI radar technology, since it would have made absolutely no sense to design a stealthy battlefield surveillance aircraft and then have it announce its presence by blasting out strong and easily detected radar signals. The AN/APQ-181 provides 20 operational modes, including a "Synthetic Aperture Radar (SAR)" mode for ground mapping, with a "Ground Moving Target Indicator (GMTI)" capability; a "Terrain Following / Terrain Avoidance (TF/TA)" mode for low-level flight; a mode for spotting and linking up with a tanker; and weather mapping and navigation modes.

Finally, the B-2 includes a countermeasures suite, the "Defensive Management System (DMS)", for which most details still remain secret. All the avionics is controlled by a total of 13 radiation-hardened "Avionics Control Units (ACUs)", run by sophisticated software to help reduce flight load and provide sophisticated cockpit data display to enhance the crew's "situational awareness".




READ MORE - The B-2 Spirit Stealth Bomber
READ MORE - The B-2 Spirit Stealth Bomber

A-10 Thunderbolt IIs have excellent maneuverability at low air speeds and altitude, and are highly accurate weapons-delivery



Mission
A-10/OA-10 Thunderbolt IIs have excellent maneuverability at low air speeds and altitude, and are highly accurate weapons-delivery platforms. They can loiter near battle areas for extended periods of time and operate under 1,000-foot ceilings (303.3 meters) with 1.5-mile (2.4 kilometers) visibility. Their wide combat radius and short takeoff and landing capability permit operations in and out of locations near front lines. Using night vision goggles, A-10/OA-10 pilots can conduct their missions during darkness.

Capt. Eric Palaro died Dec. 4 in a mid-air collision involving two A-10 Thunderbolt IIs about 100 miles northwest of Las Vegas over the Nevada Test and Training Range. Palaro, from the 81st Fighter Squadron at Spangdahlem Air Base, Germany, was participating in a training exercise. Maj. Scott Kneip, an instructor with the U.S. Air Force Weapons School A-10 division, ejected from his aircraft and is in good condition. The accident occurred at approximately 2 p.m. Both aircraft were assigned to the 57th Wing here.

A board of Air Force officials will investigate the accident.
Thunderbolt IIs have Night Vision Imaging Systems, or NVIS, goggle compatible single-seat cockpits forward of their wings and a large bubble canopy which provides pilots all-around vision. The pilots are protected by titanium armor that also protects parts of the flight-control system. The redundant primary structural sections allow the aircraft to enjoy better survivability during close air support than did previous aircraft.
The aircraft can survive direct hits from armor-piercing and high explosive projectiles up to 23mm. Their self-sealing fuel cells are protected by internal and external foam. Manual systems back up their redundant hydraulic flight-control systems. This permits pilots to fly and land when hydraulic power is lost.

The Thunderbolt II can be serviced and operated from bases with limited facilities near battle areas. Many of the aircraft's parts are interchangeable left and right, including the engines, main landing gear and vertical stabilizers.

Avionics equipment includes multi-band communications; Global Positioning System and inertial navigations systems; infrared and electronic countermeasures against air-to-air and air-to-surface threats. And, it has a Pave Penny laser spot tracker system; a heads-up display to display flight and weapons delivery information; and a low altitude safety and targeting enhancement system, which provides constantly computed impact and release points for accurate ordnance delivery. There is also a low-altitude autopilot and a ground collision avoidance system.

The A-10 is currently undergoing the precision engagement modification, which adds upgraded cockpit displays, moving map, hands on throttle and stick, digital stores management, LITENING and Sniper advanced targeting pod integration, situational awareness data link or SADL, GPS-guided weapons, and upgraded DC power. Precision engagement modified aircraft are designated as the A-10C.

The Thunderbolt II can employ a wide variety of conventional munitions, including general purpose bombs, cluster bomb units, laser guided bombs, joint direct attack munitions or JDAM), wind corrected munitions dispenser or WCMD, AGM-65 Maverick and AIM-9 Sidewinder missiles, rockets, illumination flares, and the GAU-8/A 30mm cannon, capable of firing 3,900 rounds per minute to defeat a wide variety of targets including tanks.
READ MORE - A-10 Thunderbolt IIs have excellent maneuverability at low air speeds and altitude, and are highly accurate weapons-delivery
READ MORE - A-10 Thunderbolt IIs have excellent maneuverability at low air speeds and altitude, and are highly accurate weapons-delivery

F-15 Strike Eagle is a fighter aircraft all weather conditions cooked up to get the air control and immortalization in battle in the air

McDonnell Douglas / Boeing F-15 Eagle is a fighter aircraft all weather conditions cooked up to get the air control and immortalization in battle in the air. He has awakened to the United States Air Tentera, and has made the elder flight Julai 1972. Plane publications F-15E Strike Eagle is an attacking fighter aircraft for all weather conditions that have been entered in 1989. U.S. Air Tentera parties designed to use the F-15 so that the year 2025.
In Julai 1967, A.S. Air perisikan Tentera surprised to find that when the Soviet Union has to develop a large fighter aircraft, identified as MiG-25 'Foxbat'. Western countries at that time did not know Wordpress aircraft MiG-25 aircraft pemintas cooked up as high berkelajuan, and instead of an air control aircraft; By the way, its main asset is the rate rather than kebolehkendalian. Satah tail and stabilizers have large straightened the aircraft MiG-25 It is a picture that has a high kebolehkendalian, which would likely put about U.S. keupayaan this plane pass over U.S. aircraft capabilities Realitinya, fins and stabilizers on the uprise of MiGs besat is required to have mengelakan plane than in the penyangkut stiffness during high speed flight at high altitudes.
READ MORE - F-15 Strike Eagle is a fighter aircraft all weather conditions cooked up to get the air control and immortalization in battle in the air
READ MORE - F-15 Strike Eagle is a fighter aircraft all weather conditions cooked up to get the air control and immortalization in battle in the air

F-22 Raptor is a stealth fighter aircraft the United States

Advanced Tactical Fighter (ATF) is a contract for the demonstration and validation program undertaken the United States Air Force to develop a new generation air superiority fighter to deal with threats from outside the United States, including the development of class aircraft Su-27 Soviet era.

In 1981, the United States Air Force to map the requirements to be met a new fighter aircraft intended to replace the F-15 Eagle. Envisaged that the ATF would incorporate emerging technologies including advanced alloys and composite materials, advanced control systems, high-powered propulsion systems, and stealth aircraft technology.

Proposals for the contract was filed in 1986, and two contractor teams, Lockheed-Boeing-General Dynamics and Northrop / McDonnell Douglas were selected in October 1986 to undertake a demonstration and validation phase for 50 months, which eventually produced two prototypes, the YF -22 and the YF-23.

The aircraft is planned to be a United States aircraft the most sophisticated in the early 21st century, therefore, this plane is the most expensive fighter aircraft, at a price of U.S. $ 120 million per unit, or U.S. $ 361 million per unit when added to the cost of development. In April 2005, the total cost of the development of this program is U.S. $ 70 billion, causing the number of aircraft planned to be made down to 438, then 381 and now 180, from 750 aircraft initial plan. One of the factors causing this reduction is due to F-35 Lightning II will have the same technology with the F-22, but the unit price is cheaper.

An analysis of military said attacks using the F-22 Raptor, effectively to block Tehran's nuclear development ambitions.

In a review in February of Iran's nuclear program conducted by the international atomic energy agency, found that there is ambiguity in the nuclear development.

Iran itself has been interested in developing air defense systems in anticipation of further air attacks might be carried out.

Meanwhile, Russia has been considering to sell an air defense system to Iran, and according to military analysis, it would make Iran's airspace into a "virtual no-fly zone".

A report made by the Washington Institute for Middle East Policy says that if the talks failed to persuade Iran to abandon its nuclear program, then the attack will be the F-22 can neutralize a nuclear threat from Iran's.

"Only fighters F-22 that can survive the air defense system capable of firing missiles from the ground into the air," said the former officer in the association of the presidential plane - Lt. Gen. Mike Dunn.
"Air attack from F-22 can restore the credibility of the option of military action," said a report.

Meanwhile, U.S. forces rely on themselves more F-15 Eagle and F-16 Fighting Falcon for a military operation in counter the resistance fighters who performed in Iraq and Afghanistan, Washington may have lost the ability
land defense-related threat is conventional.
Brief fighter F-22 Raptor
General Characteristics

* Crew: 1
* Length: 62 ft 1 in (18.90 m)
* Wingspan: 44 ft 6 in (13.56 m)
* Height: 16 ft 8 in (5.08 m)
* Wing area: 840 ft ² (78.04 m²)
* Airfoil: NACA 64A? 05.92 root, NACA 64A? 04.29 tip
* Empty weight: 31,670 lb (14,365 kg)
* Loaded weight: 55,352 lb (25,107 kg)
* Max takeoff weight: 80,000 lb (36,288 kg)
* Powerplant: 2 × Pratt & Whitney F119-PW-100 turbofans pitch propulsion steering, 35,000 lb (155.7 kN) each

Performance

* Maximum speed: ≈ Mach 2.42 (2575 km / h) at altituda / high altitude
* Cruise speed: Mach 1.72 (1825 km / h) at altituda / high altitude
* Ferry range: 2,000 mi (1738 nm, 3219 km)
* The highest limit services: 65,000 feet (19,812 m)
* Rate of climb: the secret (general unknown)
* Wing loading: 66 lb / ft ² (322 kg / m²)
* Thrust / weight: 1.26
* Maximum g-load: -3 / +9 g

Armament

* Guns: 1 × 20 mm (0.787 in) M61A2 Vulcan Gatling gun at the base of the left wing, 480 rounds of ammunition
* Air to Air:

* 6 × AIM-120 AMRAAM
* 2 × AIM-9 Sidewinder

* Air to ground:

* 2 × AIM-120 AMRAAM and
* 2 × AIM-9 Sidewinder and one of:
o 2 × 1,000 lb JDAM or
o 2 × Wind Corrected Munitions Dispensers (WCMDs) or
o 8 × 250 lb GBU-39 Small Diameter Bomb


F-22 Raptor is a stealth fighter aircraft the United States. It was originally envisioned as air superiority fighter for use against Soviet aircraft, the aircraft is equipped for ground attack, electronic warfare and signals intelligence.

This aircraft through a long development period, is named the prototype YF-22, three years before it was officially adopted F/A-22 named, and finally given the name of the F-22A when used on the official start in December 2005. Lockheed Martin Aeronautics is the prime contractor is responsible for the majority of the airframe, weapons, and assembling the F-22. Then his partner, Boeing Integrated Defense Systems provides the wings, avionics equipment, and pilot and maintenance training.
READ MORE - F-22 Raptor is a stealth fighter aircraft the United States
READ MORE - F-22 Raptor is a stealth fighter aircraft the United States

A turbofan engine Pratt and Whitney for the F-15 Eagle

Jet engines take air mass with relatively few and accelerate it with a large amount, in which a driver took a large mass of air and accelerate it in small amounts. Disposal of high speed of a jet engine makes efficient at high speeds (especially supersonic speeds) and high altitude. On aircraft that require low and short-distance flying, drivers who use gas turbines, which is generally known as a turboprop, is more common and more efficient. Very small aircraft usually use to run the piston engine driving remains small turboprop increasingly smaller with the development of engineering technology.

Combustion efficiency of a jet engine, like any other internal combustion engine, large influenced by the ratio of the compressed air volume with the volume of disposal. In the turbine engine of air compression and shape, Äúduct, Au through the combustion chamber to prevent back-flow from it and make possible continuous combustion and facilitation process.

Modern turbojet engine modular in concept and design. Core revenue-major power, as in the entire jet engine, called a gas generator. As well as additional modules such as a reduction gearset drive (turboprop / turboshaft), the fan through, and, Äúafterburner, Au. Types of additional equipment installed on aircraft usage.

Or jet engines, also known as a gas turbine engine is developed not only for aircraft but also for ships and land vehicles, especially for heavy vehicles such as tanks and engines and power plants for industrial machinery. There are four types of turbojet engines such as turbojet engines and turbofan engines of the energies obtained from the reaction obtained from the driving force of his jet blast. Other types of turboprop and turboshaft is working with other principles of heat energy from the gas used to play / drive a turbine connected to a propeller or also known as the power output shaft.

Rekasi simple jet engine and developed it into a twin-spool low by pass ratio turbojet. Now from turbojet low by-pass ratio, developed into a triple-spool front fan high by-pass ratio turbojet, or more commonly known as high-bypass turbofans and fanjet. The concept is still a prop-fan engine and the UDF (unducted fan) and contra-rotating fan.

Turbojet engine jet engine which is the simplest, often used for aircraft, high speed. Examples of this machine is the Rolls-Royce engines Olypus 593 used for the Concorde. Another version is the Olympus Marine engines that have power dk 28,000 (horse power, equivalent to 21 MW) is used to drive a modern warships with 20,000 tons deadweight with a high-speed operation.

Jet engines actually begins when a French engineer, Rene Lorin first proposed the patents for jet propulsion engine in 1913. Patented machine is a machine athodyd (aero-thermodynamic-duct) that has no rotating parts, or more popularly known as pulse jet engine. This type of machinery which later developed and used as the main force driving the engine flying bomb Germany, V-1 is used to bomb England.

Unfortunately the engine concept is less suitable for Lorin berpropulsi jet aircraft because it is inefficient in low speed. While at the time Lorin, not possible to make such a machine. Besides, have not introduced heat-resistant material made and developed. Lorin type machine has a similar concept with a Ramjet engine was introduced.

Furthermore, an officer in the British Royal Air Force (Royal Air Force / RAF), Frank Whittle and a student of aerodynamics University of Gottingen, Hans von Ohain (Germany) and the Italian engineer, Secondo Campini developing jet engines and the principles and concepts known in those days now that is using rotating components such as compressors and turbines.

History records that Frank Whittle filed a patent in 1930 but initially received little attention from the British Air Ministry. As a result, the discovery is not a secret Whittle and military jet engines detaik concept leaked and published in various scientific and technological journals 1.5 years later. But thanks to former colleagues at RAFserta financing for the development of the OT Falk & Partners Ltd.. Whittle then formed a company Power Jets, who finally succeeded in developing a jet engine and got the contract in the British Royal Air Force. The engine is a type W-1X which then prompted ditahun 1942, licensed by the United States.

A turbofan engine Pratt and Whitney for the F-15 Eagle is tested at Robins Air Force Base, Georgia, USA. The tunnel behind the engine and remove the sound muffled exhaust. Cage in front of the machine (left photo) to prevent small items-or human-sucked into the engine caused by the large volume of air coming into the inlet.
Jet engine is a type of internal combustion engine breathing air used in aircraft. The principle of all jet engines is essentially the same: they accelerate the mass (and the combustion air) in one direction and the Newton's third law of motion of the engine will experience a boost in the opposite direction. Which includes among other jet engine turbojet, turbofan, rocket, Ramjet, and pump-jets.
This engine air from the front and compression. Air combined with fuel and burned. Combustion adds many improvements to the energy of the gas and then discharged into the back of the machine. This process is similar to the four-movement cycle, with induction, compression, ignition, and the disposal occurs on an ongoing basis. Engines produced since the acceleration impulse through the air; force equal and opposite is the impetus generated for the machine.

Jet engines take air mass with relatively few and accelerate it with a large amount, in which a driver took a large mass of air and accelerate it in small amounts. Disposal of high speed of a jet engine makes efficient at high speeds (especially supersonic speeds) and high altitude. On aircraft that require low and short-distance flying, drivers who use gas turbines, which is generally known as a turboprop, is more common and more efficient. Very small aircraft usually use to run the piston engine driving remains small turboprop increasingly smaller with the development of engineering technology.

Combustion efficiency of a jet engine, like any other internal combustion engine, large influenced by the ratio of the compressed air volume with the volume of disposal. In turbine engines and air compressed form "duct" that passes through the combustion chamber to prevent back-flow from it and make possible continuous combustion and facilitation process.

Modern turbojet engine modular in concept and design. Core revenue-major power, as in the entire jet engine, called a gas generator. As well as additional modules such as a reduction gearset drive (turboprop / turboshaft), the fan through, and "afterburner". Types of additional equipment installed on aircraft usage.





A turbofan engine Pratt and Whitney for the F-15 Eagle is tested at Robins Air Force Base, Georgia, USA. The tunnel behind the engine and remove the sound muffled exhaust. Cage in front of the machine (left photo) to prevent small items-or human-sucked into the engine caused by the large volume of air coming into the inlet. Jet engine is a type of internal combustion engine breathing air used in aircraft. The principle of all jet engines is essentially the same, they accelerate the mass (and the combustion air) in one direction and the Newton's third law of motion of the engine will experience a boost in the opposite direction. Which includes among other jet engine turbojet, turbofan, rocket, Ramjet, and the pump-this jet. machine air from the front and make compress. Air combined with fuel and burned. Combustion adds many improvements to the energy of the gas and then discharged into the back of the machine. This process is similar to the four-movement cycle, with induction, compression, ignition, and the disposal occurs on an ongoing basis. Engines produced since the acceleration impulse through the air, the same force and the resulting contrast is encouragement for the jet took machine. machine air mass is relatively small and accelerate it with a large amount, in which a driver took a large mass of air and accelerate it in small quantities . Disposal of high speed of a jet engine makes efficient at high speeds (especially supersonic speeds) and high altitude. On aircraft that require low and short-distance flying, drivers who use gas turbines, which is generally known as a turboprop, is more common and more efficient. Very small aircraft usually use to run the piston engine driving remains small turboprop increasingly smaller with the development of engineering technology. Combustion efficiency of a jet engine, like any other internal combustion engine, large influenced by the ratio of the compressed air volume with the volume of disposal. In turbine engines and air compressed form "duct" that passes through the combustion chamber to prevent back-flow from it and make possible continuous combustion and facilitation process. Modern turbojet engine modular in concept and design. Core revenue-major power, as in the entire jet engine, called a gas generator. As well as additional modules such as a reduction gearset drive (turboprop / turboshaft), the fan through and "afterburner". Types of additional equipment installed on aircraft usage. 1 Historical development of jet engines · turbojet engine 2 Nuclear · 3 Development of jet engine technology turbofans engines o 3.1 o 3.2 o 3.3 engine turboprop turboshaft engines · · 4 References 5 See also 6 External links · History jet Mechine jet engine development was initiated when a French engineer , Rene Lorin first proposed the patents for jet propulsion engine in 1913. Patented machine is a machine athodyd (aero-thermodynamic-duct) that has no rotating parts, or more popularly known as pulse jet engine. This type of machinery which later developed and used as the main force driving the engine flying bomb Germany, V-1 is used to bomb England. Unfortunately the engine concept is less suitable for Lorin berpropulsi jet aircraft because it is inefficient in low speed. While at the time Lorin, not possible to make such a machine. Besides, have not introduced heat-resistant material made and developed. Lorin type machine has a concept similar to the later Ramjet engine introduced. Furthermore, an officer in the British Royal Air Force (Royal Air Force / RAF), Frank Whittle and a student of aerodynamics University of Gottingen, Hans von Ohain (Germany) and the Italian engineer, Secondo Campini developing jet engines and the principles and concepts known in those days now that is using rotating components such as compressors and turbines. History records that Frank Whittle filed a patent in 1930 but initially received little attention from the British Air Ministry. As a result, the discovery is not a secret Whittle and military jet engines seconds concept leaked and published in various scientific and technological journals 1.5 years later. But thanks to former colleagues at RAFserta financing for the development of the OT Falk & Partners Ltd.. Whittle then formed a company Power Jets, who finally succeeded in developing a jet engine and got the contract in the British Royal Air Force. The engine is a type W-1X which then prompted in year 1942, licensed by the United States. Machine type is W-1X was first tested in December 1940 and then modified and declared eligible for use as a power in aircraft. British jet-engine plane was first flown by test pilot Gerry Sayer on May 15, 1941 in Gloster E.28/39. Secondo Campini plane from Italy to make a jet engine in 1933 and joined with designer Giavasi Caproni aircraft makes CC-2 aircraft jet engine first flying on August 27, 1940. Italian media noted as the first jet aircraft in dunia.Hans von Ohain registering jet engine design patented in 1935. Even though the engine is considered similar to the concept Whittle, but there are many detailed differences in engine design. Then one of his professors, who knew Ernst Heinkel, the aircraft industry company owners have requested that Heinkel Hans von Ohain involved in the project to make engines. In March 1937, a powerful engine pushing 550 pounds successfully made, then push the power engine of 1980 pounds and are considered less successful and powerful engine pushing 1100 pounds full of modifications made to the aircraft and Heinkel He. Ie 178 turbojet engine HES-3b. On August 27, 1939, aircraft Heinkel He-178 and then successfully made its inaugural flight on the runway with the pilot test Marienehe Luftwaffe (German Air Force), Eric Warsitz. The development of jet engines and the first in the world is kept secret by the Nazis for military purposes. Five days later on September 1, 1939, Hitler's armies invaded Poland who became the beginning of World War II. Secrecy is what makes the common view in the world that Italy and the UK as a pioneer in machine technology jet.Di Asia, Japan will begin to look for a jet engine, especially military aviation interests in 1937 when Japan bought a Brown-Boveri machine equipped with a turbocharger from Switzerland. From this basis, not after getting mengeherankan from allies, the German form of the draft Messerschmicht fighter Me-262, Japan developed a jet engine for Ne-20 jet fighter mentenagai first Kikka, which is similar to the German fighter jet.

info
The South Korean defense officials have confirmed that a fighter jet F-15 has crashed in the country's southeastern coast. Ministry of defense and the Air Force said the plane was leaving the Daegu Air Base, about 300 kilometers southeast of Seoul Wednesday night, for flight training.

The plane disappeared from radar screens after about 40 minutes and seemed to fall into the Sea of Japan. Both pilots had not been found. Confirmation of the crash was announced after the rescue team found the fragments of the plane off the coast near the city of Pohang.

F-15K made in the United States was regarded as one of the main aircraft most sophisticated fighter jet. South Korea plans to buy 40 aircraft by the year 2008. The missing plane was one of the main of four purchased.
READ MORE - A turbofan engine Pratt and Whitney for the F-15 Eagle
READ MORE - A turbofan engine Pratt and Whitney for the F-15 Eagle
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