Question

For NACA 23021 , By using Thin Airfoil Theory, mean camber line is y = -0.0231x2...

For NACA 23021 , By using Thin Airfoil Theory, mean camber line is y = -0.0231x2 + 0.0063x + 0.0153. Calculate:

a) Zero lift angle of attack ?L=?

b) Lift coefficient ?? for ?=−?o,?o, and ?o

c) Moment coefficient at quarter chord ??,?/? for ?=−?o,?o, and ?o

d) Normalized Center of Pressure ???/? for ?=−?o,?o, and ?o

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
1) For a NACA 0008 airfoil at an angle of attack of 5°, with a downward...
1) For a NACA 0008 airfoil at an angle of attack of 5°, with a downward flap deflection of 25°, where the flap hinge point is located at 0.65c from the leading edge where c is the chord length. (5 points) Calculate the lift coefficient using thin airfoil theory. What is the zero-lift angle for 25°downward flap deflection.
Consider an infinite wing with a NACA 1412 airfoil section and a chord length of 1.5...
Consider an infinite wing with a NACA 1412 airfoil section and a chord length of 1.5 ft. The wing is at an angle of attack of 5° in an airflow velocity of 170 ft/s at standard sea-level conditions. Calculate the lift, drag, and moment about the quarter-chord per unit span. Refer to the Appendix graphs given below for the standard values. (Round the final answers to two decimal places.) 1)The lift per unit span is _______lb. 2)The drag per unit...
The airfoil data in Appendix D were obtained in the NACA two-dimensional Low Turbulence Pressure Tunnel...
The airfoil data in Appendix D were obtained in the NACA two-dimensional Low Turbulence Pressure Tunnel at the NACA Langley Memorial Laboratory. This facility went into operation in Spring 1941. The tunnel was especially designed for airfoil testing, with a test section 3 ft wide and 7.5 ft high. The wing models spanned the entire test section of width 3 ft, sso that the flow over the model was essentially two-dimensional. The chord length of the models was 2 ft....
Consider a diamond-­‐wedge airfoil in high speed flow. The half angle of the airfoil is ?...
Consider a diamond-­‐wedge airfoil in high speed flow. The half angle of the airfoil is ? = 6o Consider angle of attack values, ? = 6o Consider free stream Mach numbers, ? = 10 Using linearized supersonic theory and Newtonian theory for hypersonic flow, calculate the lift and drag coefficient for the airfoil for the given condition. Validate your results using the shock-expansion theory for case.
A wing-body model is tested in a wind tunnel with a flow of 100 m/s at...
A wing-body model is tested in a wind tunnel with a flow of 100 m/s at standard sea-level conditions. The wing area is 1.5 m2 and the mean aerodynamic chord length is 0.45 m. Measurements of lift force, L, and moment about the center of gravity, M CG are made using the wind tunnel force balance. B1(a) When the lift is zero, the moment about the center of gravity is measured to be, MCG = −12.4 Nm . At another...
5) Consider a uniform thin rod with length L. I_1 is the moment of inertia of...
5) Consider a uniform thin rod with length L. I_1 is the moment of inertia of this rod about an axis perpendicular to the rod a quarter length from its center. I_2 is the moment of inertia of the rod with respect to an axis perpendicular to it through its center. which relationship between the two inertia's is correct? a) I_1 = I_2. b) I_1 > I_2. c) I_1 < I_2. d) they could be the same or different depending...
1) In the regression equation, y = 2.164 + 1.3657x, n = 6, the mean of...
1) In the regression equation, y = 2.164 + 1.3657x, n = 6, the mean of x is 8.667, SSxx = 89.333 and Se = 3.44. A 95% confidence interval for the average of y when x = 8 is _________. 2)If the correlation coefficient between variables X and Y is roughly zero, then ______. 3) Determine the Pearson product-moment correlation coefficient for the following data. x 1 11 9 6 5 3 2 y 10 4 4 5 7...
Problem 10 A vertical line of charge starts at y = -a and ends at y...
Problem 10 A vertical line of charge starts at y = -a and ends at y = 0. A charge Q is uniformly distributed on this line. The point P1 is located at the coordinate (x, 0), where x is a positive number. (a) Draw a clear picture of the situation, including the point P1. Use this picture to help explain if there are any symmetries you can use to determine the electric field at point P1. (b) Find the...
A thin ring of radius R in the x − y plane is centered at the...
A thin ring of radius R in the x − y plane is centered at the coordinate origin, and is charged with linear charge density λ which depends on the polar angle θ as λ(θ) = λ0 sin(θ), where λ0 > 0. (a) Sketch λ(θ) for θ ∈ [0, 2π]. (b) Before doing any calculations, sketch the E~ x and E~ y vector components of the electric field at the coordinate origin, as well as where (roughly) you expect the...
A researcher wants to predict the finish position ( y) using the start position (x) in...
A researcher wants to predict the finish position ( y) using the start position (x) in a car race. For 42 drivers in a second NASCAR race held in 1997, the summary of the sample data is given below. x y mean 25.5 25.5 Standard deviation 12.27 12.27 Correlation .285 (a).Calculate a regression equation with Y predicted by X. Show your (b).Use the equation of the fitted line to predict Y when X is 5 . (c). Find the coefficient...