What is the value that maintains maximum rate and minimum power speed of the aircraft?(a) 1/\(\sqrt[4]{3}\)(b) 1/\(\sqrt[3]{3}\)(c) u^2/\(\sqrt[4]{3}\)(d) u^2/\(\sqrt[3]{3}\)The question was posed to me during an internship interview.I'd like to ask this question from Climb and Descent Performance with Power-Producing Engines topic in section Climb and Descent Performance of Aircraft Performance

What is the value that maintains maximum rate and minimum power speed

1.	What is the value that maintains maximum rate and minimum power speed of the aircraft?(a) 1/\(\sqrt[4]{3}\)(b) 1/\(\sqrt[3]{3}\)(c) u^2/\(\sqrt[4]{3}\)(d) u^2/\(\sqrt[3]{3}\)The question was posed to me during an internship interview.I'd like to ask this question from Climb and Descent Performance with Power-Producing Engines topic in section Climb and Descent Performance of Aircraft Performance
Answer» Correct choice is (a) 1/\(\SQRT[4]{3}\) The explanation is: At the maximum rate i.e. dv/du=0 the value of u=1/\(\sqrt[4]{3}\) which is the minimum power SPEED. The rate of CLIMB is given by λ-\(\frac{1}{2}\)[u^3+u^-1]=Emaxv where λ is dimensionless power, u is airspeed and Emax is ENDURANCE.

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