Midterm test solutions
Things
You Should Know By Now or Find Out Right Away
Design Report: Target Date and Guidelines
Presentation
on Space-Based Business
Click here for Assignment No. 7
Click here for Student and Instructor Comments on the Midterm Course Survey
Notes on Assgt. 7: November 2.
1.
Do not try to find the Thrust-specific fuel consumption of the engine from
fuel-air ratio etc.: you don't have enough information on the engine to
do that, yet.
Instead,
USE the TSFC data that you find for the engine that you select.
2. The Thrust Lapse Rate equations given on the "Selecting Engines" web page is OK to use.
3.
Do not use the TSFC variation given on the "Selecting Engines" web page.
For simplicity, just take the TSFC specified for your engine to be constant,
regardless of altitude or Mach number.
Speed of sound depends on the molecular weight of the gas, its "ratio of specific heats", and the absolute temperature.
Speed of sound a = square root of ( gamma*R*T)
where gamma is the "ratio of specific heats" (will see this in the engines section of this course) = 1.4 for air,
R is the gas constant = 287.04 for air in SI units
T is absolute temperature, Kelvins
Example: Air at 300K:
a = sqrt(1.4*287.04*300) = 347 m/s
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Beginner's Guide to Aeronautics:
NASA Glenn Research Center
http://www.lerc.nasa.gov/WWW/K-12/airplane/listing.html
Space Links
Space Sciences resources at
the ADL
Special resources for the AE1350 class:
Space Shuttle Data
This is probably tbe easiest to use: found
by Xin-Yuan Tan in AE2350 / NMB project, Spring '99:
http://www.spaceflight.nasa.gov/index-n.html
News Updates Info (appears to be aimed at journalists) : http://www.ksc.nasa.gov/shuttle/technology/sts-newsref/sts_overview.html#sts_overview
http://www.nasa.gov/qanda/space_shuttle.html
Shuttle Reference Info
http://www.ksc.nasa.gov/shuttle/technology/sts-newsref/stsref-toc.html
NASA Mars Exploration Document Library:
http://www-sn.jsc.nasa.gov/explore/Data/Lib/EICIndex.htm
Acoustic Shaping Inc: Georgia Tech Student
Project under the "NASA Means Business" program
http://www.ae.gatech.edu/research/windtunnel/aclev/asi/members/tasks.html
More information will appear here as we develop it
BENCHMARKING DATA
Data on Aircraft Engines and Commercial Aircraft
Drawings
of various conceptual designs: D. P. Raymer.
This link will take you to the essays written by each student in AE2350a in Spring 1999 on one of the following topics:
1. Day in the life of an Athens-Atlanta commuter in the year 2010, flying
in over what used to be the highways.
2. Day in the life of the Director of NASA Mission Control, when a
human mission is being launched.
3. Day in the life of the Captain of a tourist flight to the Hotel
Coweta in Low Earth Orbit.
4. Day in the life of the Chief Designer of the Supersonic Transport
being developed at XYZ Aircraft Co.
e-mail to Dr. Komerath: narayanan.komerath@aerospace.gatech.edu
e-mail to Dr. Dancila: stefan.dancila@ae.gatech.edu