A commercial airplane has a total mass of 150,000 lbm and a wing planform area of 1700 ft2. The plane has a cruising speed of 625 mi/h and a cruising altitude of 38,000 ft where the air density is 0.0208 lbm/ft3. The plane has double-slotted flaps for use during takeoff and landing, but it cruises with all flaps retracted. Assuming the lift and drag characteristics of the wings can be approximated by NACA 23012, determine (a) the minimum safe speed for takeoff and landing with and without extending the flaps, (b) the angle of attack to cruise steadily at the cruising altitude, and (c) the power that needs to be supplied to provide enough thrust to overcome drag. Take the air density on the ground to be 0.075 lbm/ft3.

Q: Air is flowing past a symmetrical airfoil at an angle of attack of 5°. Is the (a) lift and (b) drag…

A: If an object is placed in a fluid flow, it experiences forces. Say, a body  or say an airfoil is…

Q: 9.40 A 180-1b man parachutes from a plane using a hemispherical parachute in air at 20 °F and 14.60…

A: The weight of a man is W=180 The air temperature is T=20°F=479.67°R The pressure is P=14.6 psi The…

Q: An airfoil generates a 1200 N/m sectional lift when traveling at 75 m/s at sea level. What is the…

A: The circulation (Γ) around an airfoil is defined as the line integral of the velocity along a closed…

Q: A bicyclist of mass 70 kg supplies 300 W of power while riding into a 3 m/s headwind. The frontal…

A: Given data: m=70 kgP=300 Wvw=3 m/sA=0.36 m2CD=0.88 Need to determine the speed of the cyclist.

Q: Consider a finite wing with a NACA 1412 airfoil section with a wingspan of 12 ft and a wing area of…

A: Given: Cl =1.5 As = 240 ft^2 b = 12 ft Cdo =.035 e=0.8

Q: If the lift and drag coefficients in an airfoil are 0.998 and 0.05, respectively, determine by how…

A:

Q: The drag coefficient for the car is CD�� = 0.28, and the projected area into the 20∘C∘C airstream is…

A:

Q: 6. During a winter day, wind at 70 km/h, 5°C, and 1 atm is blowing parallel to a 4-m-high and 15…

A:

Q: What is the f (equivalent drag area) for an aircraft that creates 600 lbs of parasite drag at 10,000…

A: Write the density of air at an altitude of 10000 ft. ρ=0.0565 lbs/ft3

Q: A shuttlecock is launched from the ground with an initial speed of 33.3163 m/s at an angle of 8.1977…

A:

Q: The velocity of the liquid flowing through the divergent portion of a Venturimeter is increases…

A: It's known that AV = constant for a given flow from continuity equation.

Q: The power delivered to the wheels of a car is used to overcome aerodynamic drag. Compare the amount…

A:

Q: The rectangular wings of a microlight aircraft have a combined spanwise length of 9.144 m and…

A: Given Length = 9.144 m Width = 0.9144 m Drag coefficient = 0.01 Lift coefficient = 0.3 Altitude =…

Q: A 70 kg bicyclist is riding her 15 kg bicycle downhill on a road with a slope of 8º without pedaling…

A: terminal velocity is reached  when there is no external force acting on the body that is in this…

Q: A skydiver jumps from (5.5000x10^3) m with no parachute into a giant net. The mass of the skydiver…

A: Given data Mass of skydiver = m = 1.05 x102 kg = 105 kg  Projected Area = A = 0.45 m2 Pressure = P =…

Q: 5. The local atmospheric pressure in Denver, Colorado (elevation 1610 m) is 83.4 kPa. Air at this…

A: To find: (a) The drag force acting on the top surface of plate, if the air flows is parallel to the…

Q: The resultant of the pressure and wall shear forces acting on a body is measured to be 470 N, making…

A: Given data as per question Force =470 N Angle = 330

Q: What is the effect of increasing the airfoil angle of attack on lift and flight? Brie- explain with…

A: Up to a certain degree, increasing the angle of attack increases lift and produced drag. When…

Q: Air with uniform velocity of U is flowing over flat squal figure below. One plate is used in…

A:

Q: Is there any conflict between the boundary condition respect to the airfoil surface and the induced…

A: The boundary layer affect the lift line.

Q: The sphere of diameter of 5.0 cm is moving in still water at a velocity of 2.0 m/s. The drag…

A:

Q: 2-Air at 30 C over a flat plate at speed of 1.2 m/sec. Calculate the boundary layer thickness at…

A:

Q: ent of a vehicle increases when its windows are rolled down or its sunroof is opened. A sports car…

A: The frontal area of the car, A = 18 ft2.Drag coefficient when the sunroof is closed, CD1 = 0.32.Drag…

Q: Two steel spheres of diameters d, and d₂ where d₂ = 2d₁, are dropped from rest at the free surface…

A:

Q: How does a winglet on the wing tip reduce induced drag? Which drag is higher if an aircraft…

A: Introduction Drag is caused by the interaction of the airplane's surface with the air molecules in…

Q: A bridge over a river is supported by a pylon that is a vertical cylinder with diameter of 1.5 m and…

A:

Q: Q2: A 1.78 L four-stroke petrol engine was tested at 2500 rpm. The developed brake power is 28 kW…

A: Given     Volume, V= 1.78 L = 0.00178 m3 Brake power, BP = 28 kW               Speed, N = 2500 rpm…

Q: is the drag coefficient 2 or 0.2?

A: Yes from figure we can see that drag coefficient at 80000 is 0.2 not 2

Q: Consider a 102 mph airflow over a flat plate with a span of 9.7 ft and a planform area of 60 ft2.…

A:

Q: Light oil at 75°F flows over a 22-ft-long flat plate with a free-stream velocity of 6 ft/s.…

A: Given data: Length of plate, L = 22 ft Stream velocity, V = 6 ft/s Temperature, T = 75°F

Q: At subsonic speeds, how do the lift coefficient CL and drag coefficientCD for a wing vary with angle…

A: When the angle of attack increases, the flow separation on the upper surface of the wing becomes…

Q: Find the reaction from supports B and E. (b) Draw a beam's Shear Force Diagram. (c) Draw the moment…

A: According to the details provided in the question, we need to calculate 1. reactions  2. SFD  3.…

Q: Air at 20°C flows at V = 80.0 m/s over a smooth flat plate of length L = 17.5 m. Plot the turbulent…

A: Write the expression of Reynolds Number, ReL=VLν The kinematic viscosity of air at 20 oC is taken…

Q: Define the planform area of a body subjected to external flow. When is it appropriate to use the…

A: Planform area: Plan area of an object is taken as the planform area. The plan is the view of the…

Q: Example 5 The total mass, wing area, cruising speed, and air resistance power of a small aircraft…

A: Givenm=1800kgA=42m2V=280 km/hr =280×1033600=77.78m/sPa=190kWH=4000m

Q: Compute the lift and drag coefficients for a symmetric, diamond-shaped airfoil with a…

A: CD: drag coefficientCD0: zero-lift drag coefficientK: induced drag factorCL: liftcoefficient

Q: Determine the lift coefficient of a supersonic aerofoil, approximated by a flat plate. It is flying…

A: Introduction: The lift coefficient (CL), a dimensionless coefficient, connects the lift produced by…

Moment of Inertia

Inertia can be termed as a resistance offered by a body to change its state. A rigid body initially at rest will apply resistance when acted by an external force that tends to change its state of rest or velocity, or a body initially at motion will provide resistance in changing its state of velocity or motion for coming to a state of rest. In other words, Newton's first law of motion describes the law of inertia of a rigid body.