Model Jet Engines (The Modeller's World)

109 pp. Contents Introduction - How do jet engines work': the open gas turbine process; The question of efficiency. - The development history of the jet engine: it alI started in the 1930s; The robust jet engines of the 1950s. - Prototypes for model jet engines: drone engines and APUs (AuxiIiary Power Units); hyper-charging. - Early model jet engines: Max Drehers Baby Mamba; the Swedish PAL system and its successor Turbomin; Kurt Schrecklings FD series; Turborec T240 from FPX. - Model jet engines to date: the J-450 by Sophia Precision; AMT (Advanced Micro Turbines); the KJ66; the Arts-Turbines; the JetCat model turbine; the smallest engines; turboprop and shaft power engines. Chapter 1 - The component parts of a model jet engine - Special features of small gas turbines: combustion; rotor design; gap losses; conclusions relating to the model jet engine. - The compressor: the radial compressor; typical calculation for a radial compressor; turbocharger compressors; the compressor characteristic graph; diffuser wheels; example of calculating the diffuser system; the surge limit; the axial compressor; example calculation: axial compressor stage. - The combustion chamber: design and function of the combustion chamber; the question of fuel; mixture formation; the significance of re-circulation zones. - Turbine stage and exhaust cone: How the turbine stage works; axial turbine or radial turbine'; design and vector diagrams of an axial turbine; typical calculation: turbine design for a model jet engine; centrifugal loads on the rotor wheel; the shaft of a model jet engine; calculating the critical rotational speed. Chaper 2 - A home-made model jet engine - Introduction: what tools will I need'; selecting materials; the compressor wheel. - Constructing the engine: making the shaft; the shaft tunnel and bearing; the turbine nozzle guide vane system; the turbine wheel; balancing; the compressor system; the combustion chamber; the housing.