CRJ 700 GoJet Engine System QUESTIONS WITH COMPLETE SOLUTIONS

What is Variable Geometry on the N2 Axial compresor? correct answer: The axial compressor section of the N2 spool utilizes a Variable Geometry system to regulate the airflow through the compressor. FADEC determines the position of the inlet guide vanes and stators. The actuators that position these components use fuel from the engine's Fuel Metering Unit to hydraulically change the position of the compressor inlet guide vanes and the first four stages of the stator vanes. The Variable Geometry system protects the engine from: compressor stalls surges improves the overall efficiency of the compressor by optimizing the airflow's angle of attack. Where is mounted the ATS? correct answer: The air turbine starter mounted on the accessory gearbox of each engine. What is the Accessory Gear Box? correct answer: The accessory gear box drive N2, provides mechanical power from the ATS to operate: engine driven hydraulic pump engine's oil pump engine fuel pump fuel metering unit FADEC alternator integrated drive generator N1 control sensor ATS Combustion Section? correct answer: located between the N2 compressor and the N2 turbine. It is an annular type combustion chamber equipped with 18 fuel nozzles and two AC igniters. What is a N2 spool? correct answer: ten stage variable geometry axial low presurre compressor, connected through a drive shaft to the two stage high pressure turbine. What is a N1 Spool? correct answer: four stage high pressure turbine section that drives a single stage fan rotor through a center shaft. The single stage fan rotor is comprised of 28 titanium fan blades, surrounded by a Kevlar containment housing. What type of Engine we have on the CRJ? correct answer: CF 34 8C5B1 How much thrust produce the engine under normal conditions? APR? correct answer: 12,670 pounds of thrust during takeoff, control