All the Calculations are given in the experiment 3 file, follow the template strictly.

MAE 1106 Introduction to Aerospace Engineering
Spring 2022

Laboratory Report # 3 Guidance

Balloon Sizing

Dr. Budhyant Venepalli

Adjunct Professor


001, 005 and 006 No GTA
002, 003 and 004 Medina, Jose Antonio


This document provides guidance for the preparation of the third lab report.

Please use the provided Lab Report Template and address each of the topics below
within the specified section.

Ensure that the answers to the specified questions are easily identifiable in your lab
report, and in the order in which the questions are specified in this document.
Show all necessary equations and sample calculations to support your answer.

As a reminder, please keep in mind that the Lab Report document needs to follow
the structure and formatting provided in the Lab Report Template document
provided. To emphasize the importance of these aspects in the formal
communication process, 20 points out of a total of 100 are assigned for
document structure and formatting.

The number of points assigned to each question out of a total of 100 is indicated

1. Balloon Sizing

Let s be you class section number, and m be the number formed by the last four
digits of your UTA student ID. The value of the altitude A, in m, to be used below
is given by A =3,000 + 1,000s + m.

You have been given the assignment to size a He balloon for float condition at an
altitude A for given the real atmospheric conditions in the weather sounding data
for the FWD station on the day of your MAE 1106 class section lab meeting at

The balloon is assumed spherical, with a radius R to be determined, and with a hull
envelope made of Mylar film with a thickness of 0.001 in. The He inside the
balloon at float is assumed to have an overpressure of 2 in H2O compared to
ambient pressure, and the same temperature as ambient air.

The mass of the payload to be supported by the balloon is 1 kg.

Assume that the acceleration of gravity is 9.80446 m/s2.

a. (5p) Under “Balloon Mission Assignment” clearly and completely state the
balloon mission assignment for which you are performing balloon sizing.

b. (5p) Under “Atmospheric Data” provide a clear and concise description of
the atmospheric data (time, location) you have used and the source of the data,
and the corresponding p, T, air density, and wind conditions at altitude A. Use
consistently SI units.

c. (40p) Under “Balloon Sizing Exercise Results” provide the process and the
equations used, the values of material properties used and the sources for


the information, and the resulting balloon radius, balloon volume, balloon
envelope area, and balloon envelope weight. Please also determine the
weight of the lifting gas, the pressure of the lifting gas and its density.

d. (10p) What would happen if the balloon is forced to an


MAE 1106 Introduction to Aerospace Engineering

Spring 2022

Laboratory Report #[x]

[Laboratory Report Title]

(* Substitute the specific Laboratory Report Title provided in each Laboratory Report Guidance *)

Submitted to

Dr. Budhyant Venepalli
Adjunct Professor


[Student Name]
Class Section 00[x]
E-mail: [x]
in Partial Fulfillment of Course Requirements

I pledge, on my honor, to uphold UT Arlington’s tradition of academic integrity, a tradition that values hard work and honest effort in the pursuit of academic excellence. This Lab Report contains only work that I have personally created or that I have appropriately referenced as work from other sources. I followed the highest standards of integrity and upheld the spirit of the Honor Code.

Student Initials:_______________

Laboratory Experiments Performed on [Date]
with Class Section 00[x], Class Group [x]

Due Date and Time: [Date and Time]

Submission Date and Time: [Date and Time]

Department of Mechanical and Aerospace Engineering
The University of Texas at Arlington
Dr. D Stefan Dancila
Spring 2019

Dr. Budhyant Venepalli
Spring 2022
Arlington, TX 76019
Copyright © by Dr. D S Dancila, The University of Texas at Arlington, Used with permission.

Copyright © by Dr. D S Dancila, The University of Texas at Arlington, Used with permission.


Provide a single paragraph, self-sufficient (i.e. without external references) 200-300 word summary of the experimental work performed describing the objectives, approach, results, and conclusions. Do NOT include equations, figures, tables, etc. A reader knowledgeable in the field should be able to fully understand the work and its major findings by reading this section, and only need to refer to the body of the document for detailed aspects if/when necessary.

Table of Contents

Provide a table of contents with page number information for each section/subsection of the document. (* Delete this statement after reading *)

Summary ii
Table of Contents iii
List of Symbols iv
List of Figures v
List of Tables vi
1. Objectives of the Laboratory Experiments 01
2. Experimental Setup 01
3. Experimental Procedure and Results 03
4. Data Analysis, Interpretation, and Discussion 04
5. Conclusions 05
6. Recommendations 05
References 05
Appendix A 06

List of Symbols

Provide in alphabetical order, lower case followed by upper case, one per line, a list of all the symbols used and their meaning. Symbols used in mathematical expressions are in italic. (* Delete this statement after reading *)

Greek Symbols: (* Greek letters…*)

angle of attack

bank angle

angular velocity of the shaft

Roman Symbols: (* Letters… *)

a rivet spacing

M body mass


f final value


u ultimate value

GTA Comments:
· Do not include known units such as kg

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