Fall 2006
ME 440
Aerospace Engineering Fundamentals
Aerodynamics Lecture Examples
Example: Drag on a Vertical Stabilizer
Determine the drag on an aircrafts vertical stabilizer. We will assume that the
stabilizer is very thin (so as to ignore pressure drag
Fall 2006
ME 440
Aerospace Engineering Fundamentals
Homework #4
Solution
Problem 1
Determine the thickness of the supporting structure for an engine to prevent
failure.
Width of engine structure: 0.5 m
Height of engine structure: 1 m
Material of structure
Fall 2006
ME 440
Aerospace Engineering Fundamentals
Homework #5
Solution
Problem 1
Determine the flow rate required for the following engine configuration to produce
5,000 Nt of thrust.
Aircraft Speed: 135 m/s
Aircraft Altitude: 11 km
Afterburner Inlet Pr
Fall 2006
ME 440
Aerospace Engineering Fundamentals
Homework #6
Solutions
Problem 1
Consider a turbojet engine using methane as fuel with 300% theoretical air. The
methane enters the afterburner as at 0.5 MPa and 260 K, while the air enters at 0.5
MPa and
ME 440
Aerospace Engineering Fundamentals
Practice Problem Set #1
1. Estimate the drag on a helicopter flying at 3 km and 75 m/s.
0.5 m
1m
1m
2m
3m
The rear section has a square cross-section and the vertical stabilizer is very thin.
Ans.
Drag Force of Bu
Fall 2006
ME 440
Aerospace Engineering Fundamentals
Practice Problems #2
1. Consider that the landing gear for an aircraft is a solid bar of fiberglass/epoxy
composite of square cross section. Determine the dimensions of the cross section
in order to avoi
Fall 2006
ME 440
Aerospace Engineering Fundamentals
Practice Problem Set #3
Solutions
1. Determine the thickness of a rectangular, solid balsa wood wing that will
sustain the drag force without breaking in the situation described below.
Aircraft speed: 18
Fall 2006
ME 440
Aerospace Engineering Fundamentals
Propulsion Examples
Example: Compressor Turbine
Determine the outlet temperature and pressure for a turbine whose purpose is to
power the compressor described below:
Compressor Inlet Condition: 280 K and
Fall 2006
ME 440
Aerospace Engineering Fundamentals
Stability-Control Examples
Example: Pitch Control
Consider an aircraft flying at 100 m/s at 3 km with the following characteristics:
Aircraft mass: 20,00 kg
Wing pitching moment: 1200 Ntm
Wing aerodynami
Fall 2006
ME 440
Aerospace Engineering Fundamentals
Structures Examples
Example: Deflection of a Wing
Determine the tip deflection of a solid rectangular wing of aircraft spruce under
the following conditions.
Aircraft wingspan: 3 m
Aircraft mass: 200 kg
Fall 2006
ME 440
Aerospace Engineering Fundamentals
Homework #3
Solution
Problem 1
A four engine aircraft, two on each wing, suddenly loses the outside engine on the
right side. How should the thrust of the left side engines be adjusted, so as to
maintain
Fall 2006
ME 440
Aerospace Engineering Fundamentals
Homework #2 Solution
Problem 1
Estimate the drag force on the fuselage shown below for a cruising speed of 200
m/s at 10,000 m.
7m
8m
5m
30 m
Solution:
To calculate the drag force we will split the fusel
Fall 2006
ME 440
Aerospace Engineering Fundamentals
Combustion Examples
Example: Combustion of Butane with Specified Air to Fuel Ratio
Butane is burned with air with 130% theoretical air. Balance the chemical
reaction equation and determine the air to fue
Fall 2006
ME 440
Aerospace Engineering Fundamentals
Compressible Flow Examples
Example: Compressible Flow Nozzle Analysis
Consider our simple turbojet example of our propulsion unit. We found that
entering the nozzle we had
T5 = 1492 K
P5 = 674 kPa
For an
Fall 2006
ME 440
Aerospace Engineering Fundamentals
Exam #1
Solution
Problem 1
Determine the deceleration a 1,600 kg aircraft will undergo when its three(3)
landing gears are lowered while flying at 1 km and 10 m/s. The landing gears
have a diameter of 1
Name: _
Fall 2006
ME 440
Aerospace Engineering Fundamentals
Exam #1
Open Book, Open Notes
Problem 1
Determine the deceleration a 1,600 kg aircraft will undergo when its three(3)
landing gears are lowered while flying at 1 km and 10 m/s. The landing gears
Fall 2006
ME 440
Aerospace Engineering Fundamentals
Exam #2
Solution
Problem 1
The rectangular rudder on an aircraft is fully deployed, so as to make a right angle
with the vertical stabilizer as shown below. The rudder is attached to the vertical
stabili
Fall 2006
ME 440
Aerospace Engineering Fundamentals
Exam #2
Open Book, Open Notes
Student Name: _ PID: _
Problem 1
The rectangular rudder on an aircraft is fully deployed, so as to make a right angle
with the vertical stabilizer as shown below. The rudder
Fall 2006
ME 440
Aerospace Engineering Fundamentals
Final Exam
Solution
Problem 1
A novel aircraft has its main wing mounted on a pylon above the fuselage as
shown below.
Determine the maximum height of the pylon for this aircraft to support the drag
forc
Fall 2006
ME 440
Aerospace Engineering Fundamentals
Final Exam
Problem 1
A novel aircraft has its main wing mounted on a pylon above the fuselage as
shown below.
Determine the maximum height of the pylon for this aircraft to support the drag
force acting
Fall 2006
ME 440
Aerospace Engineering Fundamentals
Homework #1
Solutions
Problem 1
Problem A-3.6 in text
Solution:
We begin by considering the drawing shown below:
To
Generator
External Air
Scoop
Outlet
Scoop
Inlet
At the inlet, continuity gives
&
m = in
Fall 2006
ME 440
Aerospace Engineering Fundamentals
Homework #1
Solutions
Problem 1
Problem A-3.6 in text
Solution:
We begin by considering the drawing shown below:
To
Generator
External Air
Scoop
Outlet
Scoop
Inlet
At the inlet, continuity gives
&
m = in