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Let’s consider we need to design a propeller engine which has 3 blades. What will be the typical value of propeller diameter? Engine is expected to produce 400 Hp of power.(a) 80.5 unit(b) 129(c) 128.94(d) 129.95I had been asked this question in an international level competition.The query is from Propulsion in section Propulsion and Fuel System Integration of Aircraft Design |
Answer» RIGHT choice is (a) 80.5 unit Easiest EXPLANATION: Given, power = 400Hp, number of BLADES = 3 Now, diameter d = 18*(HP)^0.25 = 18*400^0.25 = 80.5 unit. |
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