I’m working on a Excel multi-part question and need an explanation to help me understand better.
Problem 11:
Suppose that a plane is traveling with an airspeed of 155 miles per hour, and the wind is blowing at 54.2 miles per hour 53 degrees south of West. In this situation you want to fly straight north. Determine:
a) The direction and angle you should point the plane
b) How fast the plane will be going over the ground in knots
Problem 12:
A plane weighs 2280 lbs, has a wing area of 245 ft^2, and C_L of 0.15 when alpha = 0. Assume that the force of lift is equal to the force of weight, Air density = 0.002469 slug/ft^3, and to use the force of lift equation. Determine:
a) How fast (in knots) must this plane be flying to maintain cruising flight at an altitude of 1000 ft? (manipulate the equation to solve for v)
b) Based on the chart provided below, complete the table computing the velocity (in knots) to
reach 1000 ft for each of the temperatures (and resultant air densities) provided.
c) What can you say about the impact of varying air density on the resultant velocity required to maintain cruising altitude?
d) Based on the equation provided and your detailed analysis/understanding from part (a) to (c), how does changing the wing area to 230 ft^2 change your answers? (i.e., redo your analysis for part (a) and (b), put them in the second chart, and describe your results)
e) Describe how changing the wing area from 245 to 230 ft^2 changes your velocity required to maintain the same altitude at 1000 ft.
Problem 13:
An airplane has two wings, each with an area of 4.00 m^2. These wings are designed such that the air flows over the top of the wing at 245 m/s and underneath the wing at 222 m/s. Assume the density (rho) is equal to 1.29 kg/m^3, and v1 is the velocity under the wing, v2 is the velocity over the wing. Determine:
a) The differential pressure required for lift
b) The mass of the airplane such that that lift on the plane will support its weight, assuming the force from the pressure difference across the wings is directed straight upward.
For this assignment, you will be adding to your MS Excel Calculators even further with some additional problems, similar to ones we have discussed in class.
For each of these problems, you are to make an excel calculator that states the problem, your given information, assumptions, and solution (similar in context to what you have done before). Ensure it is neat and clearly understandable.
ATTACHMENTS
phys_125_homework_5_problems.pdf
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