Plot the chord and pitch angle variation for a 30 cm diameter, two-bladed propeller in hover...

 

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Plot the chord and pitch angle variation for a 30 cm diameter, two-bladed propeller in hover (no- oncoming velocity), operating at a rotational speed of 2500 RPM, under the following design constraints: i) Angle of attack is fixed at 5 degrees for all radial positions ii) Sectional lift and drag coefficient for the airfoil cross section are 0.55 and 0.05 respectively iii) Total thrust is 1N iv) Hub diameter is 2 cm v) Assume a linear variation of the thrust along the blade such that the thrust at the tip is zero. Clearly explain the steps taken, and comment on the feasibility of the design. Plot the chord and pitch angle variation for a 30 cm diameter, two-bladed propeller in hover (no- oncoming velocity), operating at a rotational speed of 2500 RPM, under the following design constraints: i) Angle of attack is fixed at 5 degrees for all radial positions ii) Sectional lift and drag coefficient for the airfoil cross section are 0.55 and 0.05 respectively iii) Total thrust is 1N iv) Hub diameter is 2 cm v) Assume a linear variation of the thrust along the blade such that the thrust at the tip is zero. Clearly explain the steps taken, and comment on the feasibility of the design.

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