**AE 146 Orbital Mechanics**

Spring Quarter 2003

Design Project Part II

Oral
presentation June 4^{th} in class

Paper
report due June 6^{th} at TA’s office

*For
grading criteria, see link under design project*

The total design project (parts I and II) consists of 20% of your total
grade. No standard solution is available. __You may assume values for any
parameters you may need -- you need only to justify your assumptions. __

__Objective (Part II)__

The objective of part II is to design a rocket and staging sequence that
will take a payload mass, m_{*}, of 250 kg to its final destination in
GEO. Your rocket will conduct the maneuvers designed in Part I of this design
project. In addition to this payload, you will receive another payload mass, m_{*}'
of 100 kg from the first rendezvous satellite in GEO that you will deliver to
the second one that is 10 degrees in front of you.

- You should choose realistic
values of masses, e
, and l for each stage (for
this, additional research may be necessary). Your stages need not be
similar. You should also choose realistic values for Isp (Ve) for each
stage.
__Justify all of your choices and assumptions__. Provide references for any outside material that you used in your assumptions. - Remember: Don't just choose one situation. Investigate several scenarios and justify your final choice with some convincing reasoning. For example, look at different staging possibilities (single, two, maybe three), different motor types, possibly a parallel-staged vehicle as described on page 202 of Weisel, etc., and different combinations of the above.

__Oral Presentation (worth 50% of your
design grade) Wed
June 4 ^{th} in class__

You
will present a summary of your project in an 8 minute presentation. The summary presentation includes information
from parts I and II and should be done in a powerpoint presentation with overhead transparencies. The goal of the oral presentation,
is to convince your audience that your chosen scenario is the best. This is best done by comparing different
scenarios and by justifying certain assumptions.

__Written Report (worth 50% of your design grade) due Friday June 6 ^{th}
in TA’s office before __

Your project (both parts I and II) should be contained in a single type written project report (one report per group). The thrust of the report is to provide compelling evidence that your final design is best. To this end, you should also show results for other situations that you have calculated that for some reason described in your report are inferior to your final design. Your report should contain the following (please keep it less than 15 pages):

- Title, name, date
- Abstract (less than one page)
- Introduction
- Design Method, the basic equations
- Calculation results and
analysis.
__Present all your results in neat graphs, discuss the results and justify your choice of design parameters (don’t just attach graphs and not explain them! – you must also interpret them).__ - Summary of your parameters. Conclude by summarizing in a few sentences your design methodology and whether you have achieved your design objective.
- References
- Appendix. Attach your computer program at the end of the report.