Suppose you are designing a propeller for a radio-controlled model airplane. The overall diameter of the...

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Suppose you are designing a propeller for a radio-controlled model airplane. The overall diameter of the propeller is between 30-40 cm, and the hub assembly diameter is 5.5cm (See Figure Q2- 1). The propeller rotates at 1500 rpm and the model airplane flies at 13.5 m/s. (a) You are required to select the NACA-421X aerofoil profiles to make up the propeller, where X is the last digit of your student number. Report the aerodynamic characteristics of the aerofoil. (b) Calculate the blade pitch angle form the root to tip of the blade such that the propeller cross section is at the aerofoil's maximum efficiency along the propeller blade. (c) With the use of Computational Fluid Dynamics software, report the performance of your design. State the assumptions. (d) Discus on the differences obtained using method in (a) and (d). Vin Dpropeller Dhub W Vilade Figure Q2-1 Airplane nose Suppose you are designing a propeller for a radio-controlled model airplane. The overall diameter of the propeller is between 30-40 cm, and the hub assembly diameter is 5.5cm (See Figure Q2- 1). The propeller rotates at 1500 rpm and the model airplane flies at 13.5 m/s. (a) You are required to select the NACA-421X aerofoil profiles to make up the propeller, where X is the last digit of your student number. Report the aerodynamic characteristics of the aerofoil. (b) Calculate the blade pitch angle form the root to tip of the blade such that the propeller cross section is at the aerofoil's maximum efficiency along the propeller blade. (c) With the use of Computational Fluid Dynamics software, report the performance of your design. State the assumptions. (d) Discus on the differences obtained using method in (a) and (d). Vin Dpropeller Dhub W Vilade Figure Q2-1 Airplane nose

Answer rating: 100% (QA)

a Selecting the NACA421X Aerofoil Profiles The NACA421X aerofoil profiles are a family of aerofoils that are designed for lowspeed applications such as propellers The last digit of the profile number ... View the full answer