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.

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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.

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

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Q: 5) A wedge airfoil is placed in a supersonic flow at M = 2. G. Calculate the lift and drag…

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A:

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

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Q: An airplane with a NACA 23012 airfoil cruises at 150 m/s at an altitude of 6000 m. The airfoil has…

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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

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Q: Based strictly on your understanding of the flat-plate theoryplus adverse and favorable pressure…

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

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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

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.