4262: Rockets and Mission Analysis
Homework #5
Assigned: November 6, 2014
Due: November 20, 2014
Question 1:
In class we developed an expression for the divergence loss of a conical nozzle is developed and
shown to be:
1 cos
2
Consider a linear (as oppos
4262: Rockets and Mission Analysis
October 2, 2014
Name: _
Exam #1
Exam has 5 questions, each worth 20 points
Open notes
Make any reasonable assumptions you need, and show all work
Question 1 (20 points):
A new rocket has a combustion chamber temperature
4262: Rockets and Mission Analysis
Homework #3
Assigned: October 16, 2014
Due: October 23, 2014
The purpose of this homework assignment is to review and apply the basics of thrust chamber
model development.
Question 1
A rocket thrust chamber contains a pr
4262: Rockets and Mission Analysis
Homework #4
Assigned: October 16, 2014
Due: October 28, 2014
The purpose of this homework assignment is to explore the implications of electric propulsion
and optimum exhaust velocity.
Question 1
An electrostatic rocket
4262: Rockets and Mission Analysis
Homework #2
Assigned: September 9, 2014
Due: September 23, 2014
Purpose of this homework assignment:
1. Review the use of the rocket equation
2. Consider the impact of initial acceleration on launch vehicle performance
3
4262: Rockets and Mission Analysis
Concept Quiz #4
Name: _Solution_
In class we looked at deriving the rocket equation, which provides a relationship for the
change in velocity of a rocket to parameters such as the exhaust velocity and mass
fraction. The
4262: Rockets and Mission Analysis
October 18, 2012
Name: _
Exam #1
Question 1: [Rock]et Propulsion (10%):
An astronaut is accidentally separated from his spaceship. Luckily, during his mission he
collected a bag of moon rocks. In order to make it back to
4262: Rockets and Mission Analysis Name:
October 18, 2012 Exam #1
Question 1: [Rock]et Propulsion (10%):
An astronaut is accidentally separated from his spaceship. Luckily, during his mission he
collected a bag of moon rocks. In order to make it back to
4262: Rockets and Mission Analysis
September 30, 2010
Name: _
Exam #1
Problem 1 (25 Points):
A rocket engine uses propellants that produce gases such that c*=1,500 ms/ and =1.2. The
rocket is required to produce a thrust of 100,000 N, with an ideally expa
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Name: (/
Exam #1
4262: Rockets and Mission Analysis
October 2, 2014
Exam has 5 questions, each worth 20 points
Open notes
Make any reasonable assumptions you need, and Show all work
Question 1 (20 points):
A new rocket ha
4262: Rockets and Mission Analysis Name:
September 30, 2010 Exam #1
Problem 1 (25 Points):
A rocket engine uses propellants that produce gases such that c*=1,500 Ins/ and $1.2. The
rocket is required to produce a thrust of 100,000 N, with an ideally expan
4262: Rockets and Mission Analysis
Concept Quiz 13
Name: _
1. The converging-diverging nozzle shown above has a known area ratio, Ae/A*.
For this area ratio, we showed that there are two Mach continuous number
solutions (a subsonic and supersonic case) gi
4262: Rockets and Mission Analysis
Concept Quiz #11
Name: _
For devices operating using electrothermal propulsion, we argued that low molecular
weight is advantageous. For devices operating using electrostatic propulsion, it seems the
converse is true, i.
4262: Rockets and Mission Analysis
Concept Quiz 14
Name: _
Two nozzles half angles, , are being considered for implementation on a new launch
vehicle. In each case a nozzle area ratio, , of 144 is required. To maximize thrust, the
performance group sugges
4262: Rockets and Mission Analysis
Concept Quiz 12
Name: _
Is escape velocity dependent on the vehicle mass? Why or why not, and are there any
approximations involved, or is this universally true?
A satellite is to travel from LEO to GEO over a distance o
4262: Rockets and Mission Analysis
Concept Quiz 15
Name: _
A phenomena that may be quantified with relative ease using the Prandtl-Meyer
expansion function is the maximum turning that a flow can achieve. For example,
consider the flow exhausting from the
4262: Rockets and Mission Analysis
Concept Quiz #10
Name: _
An ion propulsion system requires a fixed Isp of 10,000 seconds, and we are interested in
doing a trade study involving different types of propellants to meet this need. Circle the
answer choice
4262: Rockets and Mission Analysis
Concept Quiz #8
Name: _
Derive an expression for the exit velocity that a nozzle could achieve for an infinite
pressure ratio (Po/Pe ), if all the properties in the combustion chamber are known.
4262: Rockets and Mission Analysis
Concept Quiz #6
Name: _
Part 1: Consider two rockets: a single stage and a two stage rocket. The two rockets are
designed so that they have the identical propellant mass, the identical total mass, and the
identical speci
4262: Rockets and Mission Analysis
Concept Quiz #3
Name: _
The purpose of this concept quiz is to examine the application momentum equation for
part of a control surface analysis. The momentum equation is:
d
UdV U U n dS F
dt V
S
What is the y-component
4262: Rockets and Mission Analysis
Concept Quiz #2
Name: _
It may be shown that the thrust of a rocket scales with area and weight scales with
volume, both based on the same characteristic length scale, L. This is expressed below as:
Thrust, T
T scales wi
Exam 1 Extra Credit
1. Question 1, Part 1 of Exam 1 was somewhat tricky because a proper solution
required an iterative solution to determine the exit Mach number for a given
nozzle expansion ratio.
a. How would you do such an iteration by hand?
b. Demons
4262: Rockets and Mission Analysis
Concept Quiz #5
Name: _
The DC-X (Delta Clipper) is a single stage to orbit
concept that was looked at a few years ago. The DCX was to take-off and land vertically. Assume that
the mass of a rocket varies linearly with t
4262: Rockets and Mission Analysis
Concept Quiz #1
Circle the best answer choice or answer in as few words as possible:
1. To launch a communications satellite into GEO from the earth, I would use some
version of a/an (chemical / electrical) rocket.
2. A
4262: Rockets and Mission Analysis
Concept Quiz #7
Name: _
In class we showed what the behavior of the thrust chamber looked like on an H-S (or TS) diagram. Sketch rough what the behavior would look like on a P-V diagram.
2
T
P
1
3
S
V
4262: Rockets and Mission Analysis
Concept Quiz #9
Name: _
For any electric propulsion vehicle, what is the ratio of power required per unit thrust to
mass flow rate per unit thrust?
A designer conceives of an electric propulsion device that can double th
4262: Rockets and Mission Analysis
Homework #1
Assigned: September 2, 2014
Due: September 16, 2014
Purpose of this homework assignment:
1. Review and practice use of mass and momentum theorem relevant to rocket propulsion
applications.
2. Gain comfort in
4262: Rockets and Mission Analysis
Concept Quiz #4
Name: _
In class we looked at deriving the rocket equation, which provides a relationship for the
change in velocity of a rocket to parameters such as the exhaust velocity and mass
fraction. The sketch be
4262: Rockets and Mission Analysis
Concept Quiz #3
Name: _Solution_
The purpose of this concept quiz is to examine the application momentum equation for
part of a control surface analysis. The momentum equation is:
d
UdV U U n dS F
dt V
S
What is the y-
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