D The below is a cross-section of a Darrieus-type and wind turbine. Find the cross Sectional moment. image provided by the bottom airfoil under the following circumstances. Calculate the lift coefficient based on the formula CL 27 (α-α₁ =0) Assume that stall is not occuring The airfoil has a zero lift angle of attack of O degrees and a sectional drag coefficient of 7x10-3 00= 41-7 RPM R = 13 degrees 188m V = 11mls C =017 m Air density = 0.91 kg/m3 Find moment in N.m m

must use thin airfoil theory Need only handwritten solution only (not typed one).

A light aircraft is flying at an altitude of 1000 m. If the wing chord is 1.5 m, and the freestream velocity is determined using the equivalent airspeed of 80 m/s, determine the overall Reynold's Number. Also, determine the coefficient of skin friction drag. (*Tip, determine what time of flow it is based on the calculated RN, then choose the correct Cf formula - laminar or turbulent)

Incorrect. A strong wind can blow a golf ball off the tee by pivoting it about point 1 as shown in the figure below. Determine the wind speed necessary to do this. Use the figure. Assume a golf ball as a smooth sphere. Assume W = 0.0992 lb. U = i 77 ft/s -Radius = 0.845 in. - Weight = W (1) 40.20 in.

Consider the following NACA airfoils: 2412, 23012, 23021 a. For each of these airfoils, find the L/D ratio for angle of attack of 0, 4, 8 and 12 b. For each airfoil find the angle of maximum L/D and find the stall angle c. Find which airfoil will provide the maximum lift for any given geometry and flow conditions

Consider a standard NACA Five digit aerofoil with h = 0.29 and k_1 = 6.643; x_h = 0.2   Find the zero lift Angle of Angle

Problem 5 A square tube is open to air at atmospheric pressure on the top and capped with a porous membrane on the bottom. The tube cross section is L = 1 cm by L = 1 cm. The porous membrane contains 100 vertically oriented cylindrical pores of diameter d = 0.1 mm. Surface tension holds a column of water (o = 0.072 N/m) from falling through the membrane. The contact angle of water with the tube is 20°. The contact angle of water with the membrane pore walls is 180° (as shown) just before the water column spills through the membrane. The membrane is 0.01 mm thick, over which there is negligible hydrostatic pressure difference. a) Estimate the vertical capillary force by the tube on the water column. b) Estimate the vertical capillary force by a single membrane pore on the water column. c) Estimate the maximum water column height that the system can hold up. Air g Cross-section A-A Water Water Tube h Membrane Air Membrane

Answer this ole

Answer is = (Re = 10.17 x 10^6, Turbulent)

Could you help me with A, B, C and D please