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Question 3 A 4-stroke, 12 cylinder piston engine is required for the propulsion of an aircraft cruising at speed of 127 m/s, at an altitude of 5000 m where the ambient conditions are 255 K and 54 kPa. The following data can be used: Thrust required 2 kN propeller efficiency 0.85 Engine brake thermal efficiency 0.32 fuel air ratio 0.06 Engine rpm 3500 Stroke Bore ratio 1.0 Volumetric efficiency 0.87 i. Calculate the engine brake power, displacement volume and cylinder dimensions Calculate the fuel required for 4 hours flight. ii.

Question 3 A 4-stroke, 12 cylinder piston engine is required for the propulsion of an aircraft cruising at speed of 127 m/s, at an altitude of 5000 m where the ambient conditions are 255 K and 54 kPa. The following data can be used: Thrust required 2 kN propeller efficiency 0.85 Engine brake thermal efficiency 0.32 fuel air ratio 0.06 Engine rpm 3500 Stroke Bore ratio 1.0 Volumetric efficiency 0.87 i. Calculate the engine brake power, displacement volume and cylinder dimensions Calculate the fuel required for 4 hours flight. ii.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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Question 3 A 4-stroke, 12 cylinder piston engine is required for the propulsion of an aircraft cruising at speed of 127 m/s, at an altitude of 5000 m where the ambient conditions are 255 K and 54 kPa. The following data can be used: Thrust required 2 kN propeller efficiency 0.85 Engine brake thermal efficiency 0.32 fuel air ratio 0.06 Engine rpm 3500 Stroke Bore ratio 1.0 Volumetric efficiency 0.87 i. Calculate the engine brake power, displacement volume and cylinder dimensions Calculate the fuel required for 4 hours flight. ii. Question 4 It is required to design a squared, four stroke, twelve cylinder, and spark ignition engine to propel an airplane. The following data can be used to decide some of the engine parameters. The airplane Mach No 0.5 ambient conditions 0.54 bar, 255 K Thrust 5.5 KN The piston Engine Brake power 1000 kW bmep 10 bar Bsfc 0.26 (kg/hr)/kW f 0.05 Engine speed 3000 rpm Calculate 1. Propeller efficiency 2. Bore and stroke dimensions 3. Actual fuel and air consumption 4. Theoretical air consumption 5. Mass of fuel required per week (7 days a week and per day one trip of 5 hrs)
Transcribed Image Text:Question 3 A 4-stroke, 12 cylinder piston engine is required for the propulsion of an aircraft cruising at speed of 127 m/s, at an altitude of 5000 m where the ambient conditions are 255 K and 54 kPa. The following data can be used: Thrust required 2 kN propeller efficiency 0.85 Engine brake thermal efficiency 0.32 fuel air ratio 0.06 Engine rpm 3500 Stroke Bore ratio 1.0 Volumetric efficiency 0.87 i. Calculate the engine brake power, displacement volume and cylinder dimensions Calculate the fuel required for 4 hours flight. ii. Question 4 It is required to design a squared, four stroke, twelve cylinder, and spark ignition engine to propel an airplane. The following data can be used to decide some of the engine parameters. The airplane Mach No 0.5 ambient conditions 0.54 bar, 255 K Thrust 5.5 KN The piston Engine Brake power 1000 kW bmep 10 bar Bsfc 0.26 (kg/hr)/kW f 0.05 Engine speed 3000 rpm Calculate 1. Propeller efficiency 2. Bore and stroke dimensions 3. Actual fuel and air consumption 4. Theoretical air consumption 5. Mass of fuel required per week (7 days a week and per day one trip of 5 hrs)
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