Jet Propulsion Types of Jet Engines Lecture Four

Jet Propulsion Types of Jet Engines Lecture Four

Engine Types There are FOUR basic types of Jet Engine Turbo Jet Turbo Fan Turbo Prop Turbo Shaft In this lesson we shall examine Turbo Props and Turbo Shafts.

Engine Types Turbo Prop PROPELLER Dart, Tyne, BR 715 TP Turbo Shaft HELICOPTER RN SHIPS POWER GENERATION Lycoming T 55, Gem Marine Spey Industrial Spey & Trent

Turbo Prop The turboprop is basically a turbojet with an extra turbine designed to absorb the energy remaining in the gas stream after sufficient has been removed to drive the compressor. The turboprop is a very efficient power unit for relative low speed, low altitude aircraft. It is High Torque at Low Speed Examples are the 748 and F 27, and the Transall C-160 and Atlantic.

Turbo Prop Rolls Royce Dart Has a 2 stage turbine which drives a 2 stage Centrifugal Compressor and Propeller Over 70 Marks of Engine used in 15 different aircraft Fokker F 27, Fairchild F 27, Briguet Alize, (and P 51 Mustang and Dakota!)

Turbo Prop Tyne C 160 Transall, Shorts Belfast, Brequet Atlantic, Avro Lincoln, Canadair CL 44, Vickers Vanguard, Aeritalia 222. Has a two shaft layout. HP Reduction Gearbox Compressor Prop Shaft (via Reduction Gearbox) LP Compressor HP Turbine LP Turbine The HP turbine drives an HP compressor, and the LP turbine drives an LP compressor and propeller through a reduction gearbox.

Turbo Prop Tyne C 160 Transall, Shorts Belfast, Brequet Atlantic, Avro Lincoln, Canadair CL 44, Vickers Vanguard, Aeritalia 222. Has a two shaft layout. HP Reduction Gearbox Compressor Prop Shaft (via Reduction Gearbox) HP Turbine LP Compressor LP Turbine The propeller is driven through a reduction gearbox because Turbo-prop engine shafts rotate too fast for a propeller.

Turbo Prop RR Allison T 56 -A-15 Reduction Gearbox C 130 Hercules Thrust Strut 14 Stage HP Compressor 4 Stage Turbine Air Intake Output Duct A 4 stage turbine drives a 14 stage compressor Shaft and the propeller. It consists of the following four major accessories -

Turbo Shaft The turbo shaft is virtually a turboprop without a propeller. It is Small Size but High Power. The main use of the turbo shaft is the helicopter and industrial and marine application, including power and pumping stations, hovercraft and ships. Examples are the Lynx, Chinook and the Sea King.

Turbo Shaft Lycoming T 55 -GA-714 Boeing CH 47 Chinook Front Rotor Transmission Rear Rotor Transmission Combining Transmission A 2 stage HP turbine drives the compressor. and a 2 stage LP turbine drives the output shaft.

Turbo Shaft Lycoming T 55 -GA-714 Boeing CH 47 Chinook Schematic diagram of a simplified turbo shaft engine.

The Ramjets have no moving parts. They use the engine's forward motion to compress the incoming air, and the Fuel Injectors to cause combustion. Air Inflow Exhaust Fuel Injectors Ramjets cannot produce thrust at zero airspeed, so cannot move an aircraft from a standstill. They require assisted take off to accelerate to a speed where they can produce thrust. Ramjets work most efficiently at supersonic speeds around Mach 3, and can operate up to Mach 6.

Engine Types Turbo Prop Dart, Tyne, BR 715 TP Turbo Shaft Gem, Lycoming T 55, Marine Spey & Trent RAMJET Has NO moving parts

Engine Types There are FOUR basic types of Jet Engines

Engine Types Turbo Jet LOW BYPASS Turbo Fan MEDIUM BYPASS HIGH BYPASS Avon, Viper, Olympus 593 Spey, BR 700 Pegasus, BR 715, V 2500 RB 211, Trent Series Turbo Prop Dart, Tyne, BR 715 TP Turbo Shaft Gem, Lycoming T 55, Marine Spey & Trent

Check of Understanding The illustration shows a layout of one type of engine. What is this layout called? Turbojet Turbofan Turboprop Turboshaft

Check of Understanding Which of these statements applies to a turboprop engine? It has one less turbine than the turbojet It has an extra turbine compared with the turbojet It is very inefficient at low aircraft speeds It has a very high residual thrust

Check of Understanding The illustration shows one layout of a turbo-prop engine. Which part is indicated? The Output Drive Shaft The Intake Duct The Thrust Strut The Reduction Gearbox

Check of Understanding A turbo-shaft engine is. . ? Low power, light weight High power, large size High power, small size Low power, heavy weight

Check of Understanding Which of these is a turboprop engine? The RB 211 The Spey The Adour The Dart

Check of Understanding The illustration shows one layout of a turbo-prop engine. Which part is indicated? The Output Drive Shaft The Intake Duct The Thrust Strut The Reduction Gearbox

Check of Understanding Which of the following statements applies to the ramjet engine? It is most efficient at subsonic speeds It has no moving parts It has only one turbine It has only one compressor

Check of Understanding The illustration shows a layout of one type of engine. What is this layout called? Turbojet Turbofan Turboprop Turboshaft

Check of Understanding Which of these is a turboshaft engine? The Pegasus The Gem The Spey The Tyne

Check of Understanding The illustration shows one layout of a turbo-prop engine. Which part is indicated? The Output Drive Shaft The Intake Duct The Thrust Strut The Reduction Gearbox

Check of Understanding Why do turbo-prop engines drive the propeller through a reduction gearbox? Turbo-prop engines aren't strong enough to take thrust of the propeller Turbo-prop engine shafts are too short to mount a propeller Turbo-prop engine shafts rotate too fast for a propeller Turbo-prop engine shafts rotate too slow for a propeller

Check of Understanding A turbo-prop engine is. . ? Low torque, high speed High torque, low speed High speed, high cost Low cost, high torque

Check of Understanding The illustration shows one layout of a turbo-prop engine. Which part is indicated? The Output Drive Shaft The Intake Duct The Thrust Strut The Reduction Gearbox

Check of Understanding Which type of jet engines are fitted to helicopters? Turboprop Turboshaft Turbojet Turbofan

Check of Understanding The illustration shows a layout of one type of engine. What is this layout called? Turbojet Turbofan Turboprop Turboshaft

Jet Propulsion End of Presentation