AA 4362 Astrodynamics

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AA 4362 Astrodynamics
Oral and Written (Power point) Briefings
Due Final Exam Day, Thursday June 20, 800 -
1000 am Room 282 Ingersol, 30 minutes
allotted for each of 4 teams Show as much
detail as you can for a 30 minute brief
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A Cheesy Movie but a good problem
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Feasibility Studies
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Assemble Giant Spacecraft in Orbit
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Daedalus II The Right Spacecraft for the Job
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Stage I Nuclear Propulsion Module
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Solid Core Fission Reactor (Stage 1)
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Stage II Crew Module
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Engine Burn Scenarios
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Planetary Data
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Team 1
Capt. Amber, S. , USA LT. Crowley, P. , USN LT.
Ebert, K. , USN
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Mission 1
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Relationship of Launch Plane to Ecliptic
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Problem Set 1
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Hint 1
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Hint 1 (CONCLUDED)
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Problem Set II
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Problem Set III
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Problem Set III (contd)
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Will They have Enough To breathe?
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Problem Set IV
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Problem Set IV (concluded)
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Team 2
LT. OKressik, S. , USN LT. Howse, C. USN LT.
Watson, V. , USN
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Mission 2
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Earth I Departure
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Problem Set 1
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Problem Set 1 (contd)
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Problem Set 2
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Problem Set 3
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Problem Set 3 (contd)
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Problem Set 4
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Team 3
Capt. Moore, B. , USA LT., McCain, G., USN
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Mission 3 (contd)
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Earth I Departure
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Problem Set 1
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Problem Set 2
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Problem set 3
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Finally, Problem Set 4
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Team 4
LT. Lindsey, K., USN LT. Waterman, B. USN
The Away Team
Mission 4 The Reconnaissance Flyby
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The Reconnaissance Flyby
While the other teams are performing the design
process for the manned mission . And while the
down-select process Is under way team 4 will
design an un-piloted flyby mission to Gather
data relevant to Earth II
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The Reconnaissance Flyby (contd)
Can we do This? well no .. Because by
the Time we get there Earth II will already be
gone How about if we speed up? then well
catch it for sure
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The Reconnaissance Flyby (contd)
Dang! That isnt Going to work either How
about if we slow down?
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The Reconnaissance Flyby (contd)
Oh Yea, Hohmann Transfer with out final DV
burn
Assume Initial LEO (160 km altitude parking
orbit) Assume Dry Spacecraft Mass Of 1000
kg 2000 kg Dry Upper stage Kick Motor with
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The Flyby Mission
Spacecraft properties
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The Flyby Mission
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The Flyby Mission (contd)
OK this is gonna be way too big of a
spacecraft how about a different approach?
Use a much smaller kick motor to put us on an
escape Parabola (minimum escape energy) and
then use a low thrust device to perform our
phasing maneuver
Low Thrust Motor Isp 2500 sec F 100
Nt Dry Weight 200 kg 0 lt Throttle lt 110
Kick Motor Isp 375 sec F 10 kn
Dry Weight 500 kg
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The Flyby Mission (contd)
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The Flyby Mission (contd)
Spiral Out for Approximately Half of the Mission
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The Flyby Mission (contd)
TOFtotal n 1/2 years
Ooops Missed! Gotta Lower Reverse Thrust
Then Spiral Back
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The Flyby Mission (contd)
TOFtotal n 1/2 years
Determine the Required propellant for 1)
escape from Earth SOI (High Thrust Kick Motor)
2) Trip from edge of Earth I SOI to edge of
Earth II SOI Once you reach Earth
II SOI how long will you have In near-Earth II
Space (within the Earth II SOI) to record data