Turboprop

turboprop engineturbo-propturbopropsengineturbinepropjetturboprop aircraftenginesturbine engineturbine power
A turboprop engine is a turbine engine that drives an aircraft propeller.wikipedia
1,100 Related Articles

Gas turbine

turbine enginegas turbinesturbine
A turboprop engine is a turbine engine that drives an aircraft propeller.
A fourth component is often used to increase efficiency (turboprop, turbofan), to convert power into mechanical or electric form (turboshaft, electric generator), or to achieve greater power to mass/volume ratio (afterburner).

Bypass ratio

high bypasshigh-bypassbypass
Turboprops can have bypass ratios up to 50-100 although the propulsion airflow is less clearly defined for propellers than for fans.
In addition bpr is quoted for turboprop and unducted fan installations because their high propulsive efficiency gives them the overall efficiency characteristics of very high bypass turbofans.

Propfan

open rotorunducted fanopen rotor engine
However, propfan engines, which are very similar to turboprop engines, can cruise at flight speeds approaching Mach 0.75.
A propfan, also called an open rotor engine, unducted fan, or ultra high-bypass turbofan, is a type of aircraft engine related in concept to both the turboprop and turbofan, but distinct from both.

Turbojet

turbojet engineturbojetsturbojet engines
In contrast to a turbojet, the engine's exhaust gases do not generally contain enough energy to create significant thrust, since almost all of the engine's power is used to drive the propeller.
Turbojets have been replaced in slower aircraft by turboprops because they have better range-specific fuel consumption.

Turbofan

turbofan enginehigh-bypass turbofanturbofans
Unlike the small diameter fans used in turbofan jet engines, the propeller has a large diameter that lets it accelerate a large volume of air.
Turbofans are closely related to turboprops in principle because both transfer some of the gas turbine's gas power, using extra machinery, to a bypass stream leaving less for the hot nozzle to convert to kinetic energy.

Jendrassik Cs-1

CS-1 prototype
The larger Jendrassik Cs-1, with a predicted output of 1,000 bhp, was produced and tested at the Ganz Works in Budapest between 1937 and 1941.
The Jendrassik Cs-1 was the world's first working turboprop engine.

Vickers Viscount

ViscountVickers Viscount 701Viscounts
The Dart-powered Vickers Viscount was the first turboprop aircraft of any kind to go into production and sold in large numbers.
The Vickers Viscount was a British medium-range turboprop airliner first flown in 1948 by Vickers-Armstrongs.

Gloster Meteor

MeteorMeteorsGloster Meteor NF.11
Two Trents were fitted to Gloster Meteor EE227 — the sole "Trent-Meteor" — which thus became the world's first turboprop-powered aircraft, albeit a test-bed not intended for production.
On 20 September 1945, a heavily modified Meteor I, powered by two Rolls-Royce Trent turbine engines driving propellers, became the first turboprop aircraft to fly.

Rolls-Royce Dart

DartRolls-Royce Dart 510engines
From their experience with the Trent, Rolls-Royce developed the Rolls-Royce Clyde, the first turboprop engine to be fully type certificated for military and civil use, and the Dart, which became one of the most reliable turboprop engines ever built.
The Rolls-Royce RB.53 Dart is a long-lived British turboprop engine designed, built and manufactured by Rolls-Royce Limited.

Boeing B-52 Stratofortress

B-52B-52 StratofortressB-52 bomber
While the Soviet Union had the technology to create the airframe for a jet-powered strategic bomber comparable to Boeing's B-52 Stratofortress, they instead produced the Tupolev Tu-95 Bear, powered with four Kuznetsov NK-12 turboprops, mated to eight contra-rotating propellers (two per nacelle) with supersonic tip speeds to achieve maximum cruise speeds in excess of 575 mph, faster than many of the first jet aircraft and comparable to jet cruising speeds for most missions.
Beginning with the successful contract bid in June 1946, the B-52 design evolved from a straight wing aircraft powered by six turboprop engines to the final prototype YB-52 with eight turbojet engines and swept wings.

Tupolev Tu-95

Tu-95Tu-95MSBear
While the Soviet Union had the technology to create the airframe for a jet-powered strategic bomber comparable to Boeing's B-52 Stratofortress, they instead produced the Tupolev Tu-95 Bear, powered with four Kuznetsov NK-12 turboprops, mated to eight contra-rotating propellers (two per nacelle) with supersonic tip speeds to achieve maximum cruise speeds in excess of 575 mph, faster than many of the first jet aircraft and comparable to jet cruising speeds for most missions.
The Tupolev Tu-95 (Туполев Ту-95; NATO reporting name: "Bear") is a large, four-engine turboprop-powered strategic bomber and missile platform.

Armstrong Siddeley Mamba

MambaMamba turboprop
The world's first single engined turboprop aircraft was the Armstrong Siddeley Mamba-powered Boulton Paul Balliol, which first flew on 24 March 1948.
The Armstrong Siddeley Mamba was a British turboprop engine produced by Armstrong Siddeley in the late 1940s and 1950s, producing around 1,500 effective horsepower (1,100 kW).

Contra-rotating propellers

contra-rotating propellercontra-rotatingcontra-rotating propellors
While the Soviet Union had the technology to create the airframe for a jet-powered strategic bomber comparable to Boeing's B-52 Stratofortress, they instead produced the Tupolev Tu-95 Bear, powered with four Kuznetsov NK-12 turboprops, mated to eight contra-rotating propellers (two per nacelle) with supersonic tip speeds to achieve maximum cruise speeds in excess of 575 mph, faster than many of the first jet aircraft and comparable to jet cruising speeds for most missions.
Aircraft equipped with contra-rotating propellers, also referred to as CRP, coaxial contra-rotating propellers, or high-speed propellers, apply the maximum power of usually a single piston or turboprop engine to drive two coaxial propellers in contra-rotation (rotation about the same axis in opposite directions).

Disk loading

disc loadingwing-disc loading
As it is more efficient at low speeds to accelerate a large amount of air by a small degree than a small amount of air by a large degree, a low disc loading (thrust per disc area) increases the aircraft's energy efficiency, and this reduces the fuel use.
The V-22 Osprey tiltrotor aircraft has a high disk loading relative to a helicopter in the hover mode, but a relatively low disk loading in fixed-wing mode compared to a turboprop aircraft.

Rolls-Royce RB.50 Trent

Rolls-Royce TrentRB.50 TrentTrent
The first British turboprop engine was the Rolls-Royce RB.50 Trent, a converted Derwent II fitted with reduction gear and a Rotol 7 ft five-bladed propeller.
The Rolls-Royce RB.50 Trent was the first Rolls-Royce turboprop engine.

Lockheed L-188 Electra

Lockheed ElectraLockheed L-188A ElectraElectra
The technology of the Allison's earlier T38 design evolved into the Allison T56, with quartets of the T56s being used to power the Lockheed Electra airliner, its military maritime patrol derivative the P-3 Orion, and the widely produced C-130 Hercules military transport aircraft.
The Lockheed L-188 Electra is an American turboprop airliner built by Lockheed.

Lockheed P-3 Orion

P-3C OrionP-3 OrionP-3
The technology of the Allison's earlier T38 design evolved into the Allison T56, with quartets of the T56s being used to power the Lockheed Electra airliner, its military maritime patrol derivative the P-3 Orion, and the widely produced C-130 Hercules military transport aircraft.
The Lockheed P-3 Orion is a four-engine turboprop anti-submarine and maritime surveillance aircraft developed for the United States Navy and introduced in the 1960s.

Lockheed C-130 Hercules

C-130C-130 HerculesHercules
The technology of the Allison's earlier T38 design evolved into the Allison T56, with quartets of the T56s being used to power the Lockheed Electra airliner, its military maritime patrol derivative the P-3 Orion, and the widely produced C-130 Hercules military transport aircraft.
The Lockheed C-130 Hercules is an American four-engine turboprop military transport aircraft designed and built originally by Lockheed (now Lockheed Martin).

Frank Whittle

Sir Frank WhittleWhittleAir Commodore Sir Frank Whittle
From 1929, Frank Whittle began work on centrifugal turbine designs that would deliver pure jet thrust.
The paper went on to describe how the increased efficiency of these sorts of compressors and turbines would allow a jet engine to be produced, although he felt the idea was impractical, and instead suggested using the power as a turboprop.

Rolls-Royce Clyde

From their experience with the Trent, Rolls-Royce developed the Rolls-Royce Clyde, the first turboprop engine to be fully type certificated for military and civil use, and the Dart, which became one of the most reliable turboprop engines ever built.
The Rolls-Royce RB.39 Clyde was Rolls-Royce's first purpose-designed turboprop engine and the first turboprop engine to pass its civil and military type-tests.

Kuznetsov NK-12

Kuznetsov NK-12MVNK-12Kuznetsov 2TV-2F
While the Soviet Union had the technology to create the airframe for a jet-powered strategic bomber comparable to Boeing's B-52 Stratofortress, they instead produced the Tupolev Tu-95 Bear, powered with four Kuznetsov NK-12 turboprops, mated to eight contra-rotating propellers (two per nacelle) with supersonic tip speeds to achieve maximum cruise speeds in excess of 575 mph, faster than many of the first jet aircraft and comparable to jet cruising speeds for most missions.
The Kuznetsov NK-12 is a Soviet turboprop engine of the 1950s, designed by the Kuznetsov design bureau.

Allison T56

T56Allison 501-D22CT56-A-16
The technology of the Allison's earlier T38 design evolved into the Allison T56, with quartets of the T56s being used to power the Lockheed Electra airliner, its military maritime patrol derivative the P-3 Orion, and the widely produced C-130 Hercules military transport aircraft.
The Allison T56 is an American single-shaft, modular design military turboprop with a 14-stage axial flow compressor driven by a four-stage turbine.

Convair R3Y Tradewind

Convair R3Y-1 TradewindConvair R3Y-2 TradewindR3Y Tradewind
The USA would incorporate contra-rotating turboprop engines, such as the ill-fated twin-turbine Allison T40 — essentially a twinned up pair of Allison T38 turboprop engines driving contra-rotating propellers — into a series of experimental aircraft during the 1950s, with aircraft powered with the T40, like the Convair R3Y Tradewind flying boat never entering U.S. Navy service.
The Convair R3Y Tradewind was an American 1950s turboprop-powered flying boat designed and built by Convair.

General Electric T31

T31TG-100General Electric XT31-GE-2
The first American turboprop engine was the General Electric XT31, first used in the experimental Consolidated Vultee XP-81.
The General Electric T31 (company designation TG-100) was the first turboprop engine designed and built in the United States.

Tupolev Tu-114

Tu-114Aeroflot Flight 65airliner version
Turboprop engines are generally used on small subsonic aircraft, but the Tupolev Tu-114 can reach 470 kt (870 km/h, 541 mph).
The Tupolev Tu-114 Rossiya (Tyполев Тy-114 Poccия) (NATO reporting name Cleat) was a turboprop-powered long-range airliner designed by the Tupolev design bureau and built in the Soviet Union from May 1955.