Activity 1 (P4)1. Select two main types of gas turbine engines and state their pros and cons with respect to operation, construction, and installation arrangement. Gas turbine engines are divided into four different types: the turbojet engine, the turbofan engine, the turboprop engine, and the turboshaft engine. Turbofan and turboprop engines will only be given a detailed study. Turboprop EngineThe turboprop engine is almost the same as the turbofan as it is also equipped with a fan in the front section of the engine, which is the propeller used as a source of force for the engine when starting. powered by the turbine. But the turboprop engine has an additional gearbox that reduces the velocity of the gas from the exhaust. The turboprop engine is only capable of flying over limited altitude and speed ranges, which is why it requires a reduction gear assembly. The turboprop engine has a typical assembly since the others that comprise main components of gas turbine engines differ only in the gearbox and torque meter assembly. The propeller of this engine can be driven via a fixed or free turbine. The fixed turbine is connected directly to the other components, compressors, reducer and transmission shaft while in the free turbine it is not connected to the compressor but only to the transmission shaft and reducer. Turboprop operation applies gas turbine operation using a propeller, except that the exhaust is not discharged to the nozzle for thrust but is used to fuel and drive the turbine. The advantages of turboprop engine are: It has the highest fuel efficiency compared to turbojet and turbofan engines It can operate on short runways unlike turbojets. Its propeller is made in reverse configuration...... middle of paper . .....l http://www.skybrary.aero/index.php/AP4ATCO_-_Turboprop_Engine http: //akshaynagarmat.hubpages.com/hub/Turbo-Jet-EnginesImagesType Comparison - http://www.daviddarling .info/images/turbojet_and_turboprop_engines.jpgTurboprop - http://www.allstar.fiu.edu/aero/images/ pic6-9.gifTurbojet - http://www.infovisual.info/05/img_en/090%20Turbo-jet %20engine.jpgTurbine Powerplant Library BookAPU - http://lurnq.com/lesson/APU-The-Hidden-Engine - Sources on an airplane/on the ground - http://4.bp.blogspot.com/-dh7Lmas37-A /TfIA5jz5vBI/AAAAAAAAEHs/671pTkAdO6Q/s1600/Screen%2Bshot%2B2011-06-10%2Bat%2B7.31.56 %2BAM%2B%2528601%2Bx%2B339%2529.pngActivity 2: Book on Aircraft Gas Turbine Power Plants ; Image - http://www.thaitechnics.com/engine/tg7/inlet.jpg Activity 3 - http://www.scribd.com/doc/3490980/Gas-Turbine-Turbojet-Turbofan-Rolls-Royce-The- Jet -Engine; Book Power plants with gas turbines for aircraft