AE 172
Aircraft Performance
Homework 1
Instructors: Assoc. Prof. Dr. Serkan zgen
Prof. Dr. Yusuf zyrk
Due: 13.03.2008
1. Using the formulae given below,
a) Plot the NACA 4412 airfoil. Show the chord line. Assume that the chord
length, c=1 m.
b) Plot the c

2007-08 SPRING SEMESTER
AE-172 Introduction to Aircraft Performance
HW #1
14.3.2008
STUDENT NAME
STUDENT ID
SECTION
1. Using the formulae given below,
a) Plot the NACA 4412 airfoil. Show the chord line. Assume that the chord length, c=1 m.
b) Plot the cam

Middle East Technical University
Department of Aerospace Engineering
Name
Spring 2016
AE172 FINAL EXAM
Duration: 120 minutes
Tuesday, 31/05/2016, 13:30
1. (25 points) Consider a propeller driven aircraft with the following properties
0 = 0.02
= 0.06
= 1

Middle East Technical University
Department of Aerospace Engineering
Dr. Ali Trker Kutay
Name
Spring 2014
AE172 MIDTERM EXAM 1
Duration: 120 minutes
Saturday, 22/03/2014, 10:00
1. (20 points) Explain how dynamic lift force is created. Also explain how a f

Middle East Technical University
Department of Aerospace Engineering
Dr. Ali Trker Kutay
Name
Spring 2011
AE172 MIDTERM EXAM 1
Duration: 120 minutes
Saturday, 26/03/2011, 10:00 am
1. (20 points) What are the names of the parts of the airplane pictured bel

For various reasons (to compute its performance, motion, etc.) as aerospace engineers we would like to
compute the forces and moments acting on aircraft. We want to make our lives easier by coming up with
formulations that are easy enough to work with.
In

Consider the viscous flow animation on wikipedia:
Suppose that a ball of diameter 1 cm is dropped into honey and water at a speed of 10 m/s.
15<2000 meaning that the second test with honey results in laminar flow whereas for first test Re1=100000 and
that

We have talked about how aerodynamic forces are created on a 2-dimensional airfoil. On many aerodynamic data sources you can find values of
aerodynamic coefficients given for airfoils. Data given for an airfoil refers to an idealized wing with infinite sp

Dynamic pressure has the physical unit of force per area. S is wing surface area. So dynamic pressure multiplied
by wing surface area gives a force. Left hand side of the equations are also force, this means aerodynamic
coefficients (C_L, C_D, C_Y) are di

If the air is steady (no air flow) a pressure transducer will measure the
same pressure at every orientation. If there is an air flow, then the
transducer measures a different pressure depending on its orientation
with respect to the flow.
Suppose that th

Spring 2011
AE172: Introduction to
Aircraft Performance
Asst. Prof. Dr. Ali Trker Kutay
Middle East Technical University
Department of Aerospace Engineering
Introduction to Aircraft
Performance
Aircraft (A/C):
(from Wikipedia)
Aircraft are vehicles which

Spring 2010
AE172: Introduction to
Aircraft Performance
Elements of an Aircraft
Asst. Prof. Dr. Ali Trker Kutay
Middle East Technical University
Department of Aerospace Engineering
Flight Mechanics
Control motion of an aircraft in 3D space
Position (3 tra

The horizontal impact force applied by the wall changes
the horizontal component of the velocity vector.
So the wall gets hit by the molecules constantly. The total force
exerted by all the molecules becomes significant in magnitude. This
total force is c

Middle East Technical University
Department of Aerospace Engineering
Name
Spring 2014
AE172 MIDTERM EXAM 2
Duration: 120 minutes
Thursday, 24/04/2014, 17:40
1. (25 points) Consider the typical versus given in the figure
for an aircraft. Winglets are insta

Middle East Technical University
Department of Aerospace Engineering
Name
Spring 2016
AE172 MIDTERM EXAM 2
Duration: 120 minutes
Monday, 09/05/2016, 17:40
1. (40 points) For a specific aircraft at a steady level flight, the required power at a given altit

Middle East Technical University
Department of Aerospace Engineering
Name
Spring 2015
AE172 MIDTERM EXAM 2
Duration: 120 minutes
Monday, 11/05/2015, 17:40
1. (25 points) The minimum speed an aircraft can maintain steady level flight can be determined by t

1)
2
Given: C D = 0.0271 + 0.0335C L , e = 0.95
3
1
Find: AR, C L C D , C L 2 C D , C L 2 C D
Assumptions:
1) Parasite drag does not vary with lift.
2) No wave drag
Analysis:
a)
Total drag is defined as follows;
2
C D = C D.0 + KC L .
K value is defined a

AE 172
Aircraft Performance
Homework 3
Instructors: Assoc. Prof. Dr. Serkan zgen
Prof. Dr. Yusuf zyrk
Due:29.04.2008
1. Consider an airplane weighing 30,000 kg powered by a turbojet engine
delivering 100 kN thrust at sea level. The wing area is 85 m2. The

1) Write all the things in the homework by using pencil . Please do not use pen. You
can write your homework, by using package programs (MS word,etc.).
2) Do not use colorful pencil. If you want to show importance of a result, you can
draw a box around it

a)
Thrust Req. at 0 m.
Thrust Avail. at 0 m.
V Max at 0 m.
Thrust Req. at 5000 m.
Thrust Avail. at 5000 m.
V Max at 5000 m.
Thrust Req. at 10000 m.
Thrust Avail. at 10000 m.
V Max at 10000 m.
1,4E+05
Thrust Req. and Thrust Avail. (N)
1,2E+05
1,0E+05
8,0E+

AE 172
Aircraft Performance
Homework 4
Instructors: Assoc. Prof. Dr. Serkan zgen
Prof. Dr. Yusuf zyrk
Due:22.05.2008
1. Consider a Boeing 727 airplane with the following characteristics:
Available thrust:
180,000 N at sea level.
Weight:
700,000 N.
Fuel we

MIDDLE EAST TECHNICAL UNIVERSITY
AEROSPACE ENGINEERING DEPARTMENT
AE172 INTRODUCTION TO AIRCRAFT PERFORMANCE
HW 1
Due: 23 March 2007 / FRIDAY
(1) Consider NACA 64-212 airfoil.
(a) Draw the airfoil on a graph with 1 to 1 x-to-y scale.
Determine its:
(b) Ca

Middle East Technical University
Department of Aerospace Engineering
Dr. Ali Trker Kutay
Name
Spring 2012
AE172 MIDTERM EXAM 1
Duration: 120 minutes
Sunday, 1/04/2012, 16:00
1. (20 points) Explain how the lift and drag forces of 3D wings with finite wing

Middle East Technical University
Department of Aerospace Engineering
Dr. Ali Trker Kutay
Name
Spring 2013
AE172 MIDTERM EXAM 1
Duration: 120 minutes
Saturday, 13/04/2013, 10:00
1. (25 points) Write the names of the aircraft components shown on the figures

Middle East Technical University
Department of Aerospace Engineering
Name
Spring 2016
AE172 MIDTERM EXAM 1
Duration: 120 minutes
Monday, 11/04/2016, 17:40
1. (25 points) Consider an aircraft with weight = and span = . The planform (top view) of the aircra

Middle East Technical University
Department of Aerospace Engineering
Dr. Ali Trker Kutay
Name
Spring 2013
AE172 MIDTERM EXAM 2
Duration: 120 minutes
Saturday, 18/05/2013, 10:00
1. (10 points) Draw the force diagram for a climbing flight and derive the fol

Middle East Technical University
Department of Aerospace Engineering
Name
Spring 2015
AE172 MIDTERM EXAM 1
Duration: 120 minutes
Monday, 6/04/2015, 17:40
1. (20 points) Explain how the speed of an aircraft is measured using a pitot-static system (pitot tu

Middle East Technical University
Department of Aerospace Engineering
Name
Spring 2015
AE172 MIDTERM FINAL EXAM
Duration: 120 minutes
Tuesday, 26/05/2015, 17:00
1. (30 points) Consider a jet aircraft with the following properties
= 2
0 = 0.04
= 0.04
= 1

Middle East Technical University
Department of Aerospace Engineering
Name
Spring 2014
AE172 FINAL EXAM
Duration: 120 minutes
Sunday, 01/06/2014, 13:30
1. (25 points) Consider a propeller aircraft in steady level flight at its stall speed at the altitude w