A propeller speed reduction unit is a gearbox or a belt and pulley device used to reduce the output revolutions per minute (rpm) from the higher input...

device which controls the propeller pitch and thus speed is called a propeller governor or constant speed unit. Reversible propellers are those where the pitch...

Aircraft equipped with contra-rotating propellers (CRP) coaxial contra-rotating propellers, or high-speed propellers, apply the maximum power of usually...

variable "constant-speed" type. The propeller attaches to the power source's driveshaft either directly or through reduction gearing. Propellers can be made...

also be started manually by pulling a cable). After the Riedel unit has reached a speed of about 300 rpm, it automatically engages the compressor shaft...

of British engines. Aircraft fitted with variable-pitch propellers or constant speed propellers are started in fine pitch to reduce air loads and current...

Counter-rotating propellers (CRP) are propellers which turn in opposite directions to each other. They are used on some twin- and multi-engine propeller-driven...

turboprop is a turbine engine that drives an aircraft propeller. A turboprop consists of an intake, reduction gearbox, compressor, combustor, turbine, and a...

reduces propeller efficiency at high rotational speed which, in turn, reduces power transmission from the aircraft's engine. In the case of a propeller, this...

an aircraft to be designed with a variable-pitch propeller, to give maximum thrust over a larger speed range. A fine pitch would be used during take-off...

Components Propeller governor Propeller speed reduction unit Spinner Terminology Autofeather Blade pitch Constant-speed Contra-rotating Counter-rotating...

Reverse thrust is also available on many propeller-driven aircraft through reversing the controllable-pitch propellers to a negative angle. The equivalent...

pumps; should all the engines fail in flight the pilot will deploy a propeller-driven electric generator called a Ram-Air Turbine (RAT) which is concealed...

the rated pressure and speed. In electronics, volumetric efficiency quantifies the performance of some electronic function per unit volume[of what?], usually...

The power section consists of additional stages of turbines, a gear reduction system, and the shaft output. The gas generator creates the hot expanding...

constant speed drive (CSD) also known as a constant speed generator, is a type of transmission that takes an input shaft rotating at a wide range of speeds, delivering...

use of the pulsejet engine, with the volume production of the Argus As 014 unit (the first pulsejet engine ever in volume production), was for use with the...

Ford vehicles from 1973 through 1990, when a gear-reduction unit conceptually similar to the Chrysler unit replaced it. A variant on the electric starter...

Scaled Composites. Concorde flew long distances at supersonic speeds. Sustained high speeds would be impossible with the high fuel consumption of afterburner...

P.E. (1967). Two-Stroke Power Units. Newnes. Ricardo, Harry (1922). The Internal Combustion Engine. Vol. I: Slow-Speed Engines (1st ed.). London: Blackie...

starter/generator) at speeds above which the engine no longer requires starter assistance. Index of aviation articles Air Start Unit AVPIN - A monofuel used...

formation of ice. The air then exits through small holes in the wing edge. On propeller-driven aircraft, it is common to use bleed air to inflate a rubber boot...

Motivated by government regulations mandating reduction of fuel consumption (in the USA) or reduction of carbon dioxide emissions (in Europe), passenger...

rocket to a speed of about 90 m/s, which allowed the rocket to reach an altitude of 450 m. In 2023 researchers announced a demonstration unit of a hybrid...

to land in the Severn Estuary. A failure in the Bristol Proteus propeller reduction gearbox led to an overspeed and release of the power turbine of Nº3...

spinner is an aircraft component, a streamlined fairing fitted over a propeller hub or at the centre of a turbofan engine. Spinners both make the aircraft...

smog and other atmospheric pollutants. Reductions in efficiency may be counteracted with an engine control unit using lean burn techniques. In the United...

longer, engine. By replacing the propeller used on piston engines with a high speed jet of exhaust, higher aircraft speeds were attainable. One of the last...

providing fuel to the engine, the fuel system is also used to control propeller speeds, compressor airflow and cool lubrication oil. Fuel is usually introduced...

thrust, the propeller will go into a feathered mode to reduce drag. The auto feather system also allows pilots to reduce the drag of the propellers during...