Consider the NACA2418 airfoil. a) Given that the Reynolds number is Re= 5.9 E6 with standard roughness, find the angle of attack that leads to a drag coefficient of 0.016. b) At what value of the angle of attack are the values of parasite drag and induced drag the same? Take AR = 7, load factor n=1, efficiency factor e = 0.95, and wing loading of 100 lb/ft^2.

What difference(s) did you notice using a pneumatic circuit over hydraulic circuit.explain why the pneumatic piston stumbles when it hits an obstacle.

Abrake has a normal braking torque of 2.8 kip in and heat-dissipating cast-iron surfaces whose mass is 40 lbm. suppose a load is brought to rest in 8.0 s from an initial angular speed of 1600 rev/min using the normal braking torque; estimate the temperature rise of the heat dissipating surfaces.

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.