types of jet engines

There are five main types of jet engines. Jet engines, excluding the ramjet, all have four basic stages: intake, compression, combustion, and exhaust. These systems convert heat energy and high-pressure air to produce thrust. Thrust may be generated through high power exhaust or through propeller systems. Each type of jet engine has its own unique properties.

  • Turbojets

 After the air enters through an inlet, it enters the compressor. The compressor may be axial or centrifugal. Air flows through an axial compressor parallel to the axis of rotation, while air flows through a centrifugal compressor perpendicular to the axis of rotation. Centrifugal compressors are less effective at creating thrust and are less fuel efficient, but they increase enough pressure for efficient combustion within one stage and are easier and more cost effective to manufacture. After the air is compressed, it passes through the combustion chamber. In there, the fuel/air mixture is ignited, and the resulting gases are expelled and thrusts the aircraft forward.

  • Turboprops

Turboprops are similar to turbojets. The difference is that the energy generated from combustion is used to power a propeller instead of to produce exhaust. Most of the aircraft that have turboprops are small airliners and transport aircraft because they are more efficient at flight speeds below 500 mph. Air and gas pressure is also used to rotate the turbine, which is connected to the compressor, and therefore powers it throughout the flight.

  • Turbofans

Turbofans are used on most commercial airliners because they increase efficiency. They are similar to turbojets, but instead of passing all of the air through the compressor and combustion chamber, the remaining air passes through a fan and the cold air is mixed with the hot gas and used to increase exhaust power. This increases the thrust without increasing fuel consumption.

  • Turboshafts

Turboshafts are similar to turboprops but instead of powering a propeller, it powers a helicopter rotor. The speed of the helicopter’s rotor is independent of the rotating speed of the gas generator, which allows the rotor speed to remain constant.

  • Ramjets

Ramjets are primarily used in guided-missile systems and space vehicles. This is due to the fact that they require assisted takeoff and they produce small amounts of thrust below the speed of sound. They are similar to turbojets, but do not contain the rotating machinery. Their compression ratio depends on forward speed.

At Parts Needed Yesterday, owned and operated by ASAP Semiconductor, we can help you find all the engine parts you need, new or obsolete. As a premier supplier of parts for the aerospace, civil aviation, and defense industries, we’re always available and ready to help you find all the parts and equipment you need, 24/7x365. For a quick and competitive quote, email us at sales@partsneededyesterday.com or call us at +1-434-321-4470.

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What Is an Aircraft Magento?

Stan Lee, may he rest in peace, helped create the icon that is X-Men’s Magneto. The fictional character, created in 1963, shares the name of a magneto component, which has been in operation since 1903— suggesting that he may have based the character on this powerful electrical generator. Both Magnetos utilize the basic functioning principles of a magnetic field— let’s take a look at how a magneto component is put to work in aviation. Generally speaking, ignition systems need to generate high voltage in a small window of time, we’re talking around 20,000 volts in an instant.

What is an Aircraft Magento? How it Works?

A magneto is a simple and reliable way to generate power for a spark plug; it works very similarly to an electromagnet, but it achieves its magnetic field in a slightly different way. Electromagnets are used in various battery configurations. A coil of wire around an iron bar acts as the armature; and when current is applied to this coil, the coil creates a magnetic field within the armature. In the case of an electrical generator, a magnet is rotated past the armature to create electric current in the coil. Finally, a distributor carries the current to a spark plug.

Now, in the terms of aircraft magneto configuration, they provide power to fire aircraft spark plugs. Most aircraft will have a dual arrangement system. An ignition system separate from the electrical system of an aircraft is necessary in the event of alternator or battery failure. Aircraft magneto systems can consist of up to fifteen parts and fasteners, but there are five essential components: the armature, primary coil, secondary coil, electronic coil unit, and a pair of permanent magnets. The magneto assembly within piston engines and turbocharged engines differ to some degree.

In a piston engine, two magnetos operate on separate ignition systems. A piston aircraft has two aircraft spark plugs equipped per cylinder, and therefore will have a left and right aircraft magneto. The dual arrangement allows for more efficient combustion and ensures that the ignition will continue to spark despite a failure of one ignition system.

Turbocharged engines on the other hand, may require a specialized magneto in the event that a pressurized system is needed. In this case, the configuration must prevent incoming air from being ionized. To accomplish this, air flow from the turbocharged system can be diverted to the aircraft magnetos. A discrete opening is located at the bottom of the component, allowing a small amount of air leakage, and providing a constant flow of air to the generators.

The magnetic flux of a magneto electrical generator is extremely useful to aircraft ignition systems. They are a self-contained and independent system that are used time and time again due to their reliability, compact structure, and simple design.

At Parts Needed Yesterday, owned and operated by ASAP Semiconductor, we can help you find a magneto parts supplier, and new or obsolete magneto parts. As a premier supplier of parts for the aerospace, civil aviation, and defense industries, we’re always available and ready to help you find all the parts and equipment you need, 24/7x365. For a quick and competitive quote, email us at sales@partsneededyesterday.com or call us at +1-434-321-4470.

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Aviation Turbine Engine

Gas turbine engines power most modern aircraft and have streamlined air travel and aircraft technology as we know it. The differences between modern turbine engines tend to rely on how exhaust is utilized to create thrust. Overall, the parts of a turbine engine will usually include the following components: inlet/s, compressor, burner, turbine, and exhaust nozzle. Turbine engines used in modern aircraft are separated into 4 categories: turbojet engine, turboprop engine, turbofan engine, and afterburning turbojet engine.

Turbojet Engine

Aircraft with this engine utilize basic turbine functionality. Air is received through an inlet and transferred to a compressor where pressure increases as the air travels to the turbine blades. Air pressure is at its highest as it enters the burner and is mixed with fuel. The turbine blades spin the heated air and release exhaust, creating thrust to power the aircraft. Excess thrust is passed through a central air shaft and feeds power to the compressor.

Turboprop Engine

Units of this variation function similarly to turbojet engines. Their proprietary components include a core turbine engine and propeller. In contrast to a turbojet engine, exhaust in a turboprop is used to power thrust and the propeller. Aircraft with a turboprop will typically have two compact turbine stages equipped to their fuselage—a standard turbine to power thrust, and secondary unit to power the propeller.

This assembly allows exhaust to travel through a drive shaft to the additional turbine, and into a gearbox to feed power to the propeller. The turboprop design becomes less efficient as the aircraft speed capability increases.

Turbofan Engine

This system is utilized by most modern aircraft. It is capable of high thrust and has the leading fuel efficiency of any turbine engine. In this configuration, two fans are positioned as front and rear bookends to the core engine. Known as the fan and fan turbine, the two components are connected to an additional fan shaft. Exhaust passes through the fan shaft to the core shaft and is expended from the nozzle creating what is referred to as a two-spool engine arrangement.

Excess incoming air is circulated around the core engine. The two-spool arrangement gives the turbofan engine a low bypass ratio as air passes through, and past, the core shaft. When this occurs, the fuel flow rate is changed, giving the turbofan engine more thrust than a turbojet on the same amount of fuel.

Afterburning Turbojet Engine

The component utilized by this type of turbojet is known as the “afterburner”, though the mechanism can also be installed on turbofan engines. Turbojet engines with this addition capitalize on the low bypass ratio turbofan design but add a unique component. Fighter jets and supersonic aircraft need engines that are capable of two main functions: high thrust that is quick to engage, and concession for any added drag. An afterburner manages to provide just this by injecting fuel into hot exhaust. In this case, a collection of flames in a ring are located directly after the nozzle. The component extends, and fuel is injected into the incoming exhaust. Mechanically, this allows an easy and quick way to activate thrust, however, the extra fuel injection is largely inefficient.

At Parts Needed Yesterday, owned and operated by ASAP Semiconductor, we can help you find all the turbojet engine parts, and turboprop propulsion system parts and assemblies you need, new or obsolete. As a premier supplier of parts for the aerospace, civil aviation, and defense industries, we’re always available and ready to help, 24/7x365. For a quick and competitive quote, email us at sales@partsneededyesterday.com or call us at +1-434-321-4470.

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Aircraft Reciprocating Engine Starting System

Since the Wright Brothers’ first flight in 1903, the aviation industry has changed quite a bit. But, one of the most crucial components, the reciprocating engine, has not.

The reciprocating engine is a heat engine used on propeller aircraft that uses one or more reciprocating pistons to convert pressure into rotary motion in order to turn the propeller. The reciprocating engine can be started in various ways, depending on size of the engine. For aircraft flying at higher altitudes, starting the aircraft is troublesome due to lubricating oil congealing at higher altitudes. For smaller and older aircraft, the starting system used are inertia starters. Although there are not many left with inertia starters, it’s important to know the different types of inertia starters.

There are three inertia starters that include hand, electric, and combination of the two. Inertia is the resistance of any physical object to any change in its velocity. The inertia starters use the transfer of energy to start the reciprocating engine. As the motion of cranking—by hand— or rotation—by an electric motor— is initiated, the energy is transferred linearly or rotationally. And, the movable parts, such as reduction gears, the shaft, and the flywheel begin to move. When the starter is engaged, the energy is transferred to the flywheel, and then to the engine. The motions involved for the hand crank and the electric motor are similar. The electric motor just requires additional equipment and mechanisms to engage and disengage the starter. The electric motor also uses helical motion to produce the required torque needed to reach the necessary speed. Once the necessary speed is reached, the starter automatically disengages.

Parts Needed Yesterday, owned and operated by ASAP Semiconductor, should always be your first and only stop for all your aircraft reciprocating engine part needs. Parts Needed Yesterday is a premier supplier and distributor of reciprocating engine aircraft parts, whether new or obsolete. Parts Needed Yesterday has a wide selection of parts to choose from and is fully equipped with a friendly and knowledgeable staff that is always available and ready to help you find the parts you need, 24/7x365. If you’re interested in a quote, email us at sales@partsneededyesterday.com or call us at +1-434-321-4470.

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