POWERPLANT

Contains the engine's internal parts and provides attach points for the cylinders, external accessories, and airframe installation. It is made of cast aluminum alloy.

Crankcase

it provides mounting pads for the accessory units, such as the fuel pressure pumps, fuel injector pumps, vacuum pumps, oil pumps, tachometer generators, electric generators, magnetos, starters, two-speed supercharger control valves, oil screens, hydraulic pumps, and other units.

Accessory section

a selfcontained, electrical generator that produces high-voltage electricity to create sparks for igniting the fuel-air mixture in the engine's cylinders.

Magneto

a device that mixes fuel with air in precise proportions to create a combustible mixture for the engine's cylinders

Carburetor

a crucial component in any aircraft piston engine. Its primary function is to circulate engine oil throughout the engine's various components, providing lubrication, cooling, and cleaning

Aircraft Oil Pump

a versatile component that plays a crucial role in both starting the engine and providing electrical power to the aircraft, ensuring its safe and efficient operation.

Starter Generator

It's where the combustion process takes place. is a cylindrical space in which a piston moves up and down

Cylinder

a component that sits atop the cylinder block. It contains the valves, spark plugs, and cooling fins (in aircooled engines). It is the main structural component of the engine. It houses the cylinders and provides a foundation for the crankshaft and other components

Cylinder head

It is the main structural component of the engine. It houses the cylinders and provides a foundation for the crankshaft and other components

Cylinder Block

a part of the cylinder barrel in an aircraft reciprocating engine. It is the section of the cylinder that has a thickened edge or rim designed to provide a surface for securing the cylinder to the engine block or crankcase. It is typically equipped with bolt holes, which allow the cylinder to be bolted to the engine's crankcase, forming a secure connection

Cylinder Flange

is the lower portion of a piston that extends down from the main body of the piston. It is the part of the piston that fits within the cylinder bore and is in contact with the cylinder walls.

Cylinder Skirt

It is the interior surface of the cylinder block that forms the boundary for the piston's movement.

Cylinder wall

It is the diameter of the cylinder wall.

Cylinder Bore

These are thin, extended surfaces that are attached to the cylinder head of an air-cooled reciprocating

engine.Their primary function is to

increase the rate of heat transfer

from the engine to the

surrounding air, thereby helping

to prevent overheating.

Cooling Fins

These are are cylindrical protrusions or projections on the cylinder head of a reciprocating engine that serve as mounting points for the rocker arm shaft.

Rocker Arm Shaft Bosses

It is a component within the cylinder head of an internal combustion engine. This forms the sealing surface between the valve and the cylinder head. Steel, alloys, or sometimes carbide, to withstand the high temperatures and pressures generated during engine operation.

Valve Seat

It is a cylindrical component located in the cylinder head of an internal combustion engine. Its primary role is to provide a controlled path for the valve stem to move up and down as it opens and closes the valve. The valve guide ensures that the valve operates smoothly and maintains proper alignment within the engine, preventing excessive wear and misalignment.

Valve Guide

It is the opening in the cylinder head of a reciprocating engine that allows the spark plug to be installed.

Spark Plug Port

It is a plunger that moves back and forth or up and down within an engine cylinder. A cylindrical component that moves up and down within the cylinder. It's responsible for compressing the fuel-air mixture, igniting.

Piston

It is a cylindrical component that connects the piston to the connecting rod in a reciprocating engine.

Piston Pin

These are are circular components that are fitted into grooves on the piston's periphery.

Piston ring

Purpose of this is to prevent the escape of combustion gases past the piston during engine operation.

Compression ring

It is designed to regulate the amount of oil that is applied to the cylinder walls for lubrication while preventing excessive oil from entering the combustion chamber.

Oil Control Ring

It is designed to scrape or remove excess oil from the cylinder walls during the piston’s movement, ensuring that only the necessary amount of lubrication is left behind.

Oil Scraper Ring

It is the link that transmits forces between the piston and the crankshaft. It must be strong enough to remain rigid under load and yet be light enough to reduce the inertia forces that are produced when the rod and piston stop, change direction, and start again at the end of each stroke.

Connecting Rod

The type of connecting rod is used in inline and opposed engines. The big end of the connecting rod is attached to the crankpin and fitted with a bearing cap.

Plain type

Type of connecting rod used primarily in Vtype engines. The forked rod is split at the crankpin end to allow space for the blade rod to fit between the prongs.

Fork and Blade Rod Assembly

The type of connecting rod where the piston in one cylinder in each row is connected to the crankshaft by a master rod. All other pistons in the row are connected to the master rod by articulated rods.

Master and Articulated Rod Assembly

The rotation is transmitted to the aircraft’s propeller or other parts that require rotational power. This is a key part of the engine’s power transmission system and is connected to various other components such as the camshaft, timing gears, and accessory drives. carbon steel or alloy steel, often containing elements like chromium, molybdenum, and nickel.

Crankshaft

This bearing is located at the point where the connecting rod attaches to the crankshaft. It allows the rotating crankshaft to transmit the reciprocating motion to the piston, which in turn drives the engine.

Main Journal Bearing

It is the part of the crankshaft where the connecting rod attaches. It is a cylindrical section of the crankshaft, and it serves as the pivot point that allows the connecting rod to move in a circular arc as the crankshaft rotates

Crankpin

It refers to the network of internal channels or drilled holes within the crankshaft designed to carry lubricating oil to various parts of the crankshaft and associated components.

Crankshaft Oil Passage

It is one of the lateral portions or arms of the crankshaft that connects the crankpin to the center or main axis of the crankshaft.

Crank Cheek

It refers to the central line around which the crankshaft rotates. It is the axis that runs through the main journals of the crankshaft, where the crankshaft is supported by bearings in the engine block.

Crankshaft Axis of Rotation

It is a connection at the forward end of an aircraft's crankshaft. It serves as the mounting point for the propeller or reduction gear assembly (in some aircraft engines).

Propeller flange

It is a weighted component attached to the crankshaft to help balance the engine’s rotating assembly. It act as a counterbalance to reduce the overall vibrations during engine operation.

Counterweight

It Is a device that is mounted on the crankshaft of an engine to minimize torsional vibrations caused by the uneven power pulses generated during the combustion process.

Dynamic Damper

It is a surface that supports and reduces friction between two moving parts. These are used in an aircraft engine include the main journals, crankpins, connecting rod ends, and accessory drive shafts.

Bearings

It is used to maintain separation between the inner and outer races. They are designed to handle both radial and axial loads with low friction.

Ball Bearing

It consist of a simple bearing surface without rolling elements. They use a lubricating film to reduce friction.

Plain (journal) bearings

It a type of rolling-element bearing that uses cylindrical rollers instead of balls to support radial and/or axial loads. They are designed to reduce friction and allow smooth rotation of components.

Roller Bearing