CDR

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FRR
By K-SAT SLI Team
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The Krueger SLI team will launch a rocket a
mile high and sample the ozone concentration at
various altitudes during descent. Once the data
is recovered it will be compared with ground
level concentration.
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Changes Since CDR

• Changes made to Vehicle Criteria
• We have changed our main parachute to an 100
  instead of a 78.
• We also changed the length of the rocket to
  93.26 instead of 122.25
• Changes made to Payload Criteria
• We fixed the payload diagram for
  the redundant system.
• Changes made to Activity Plan
• - The teachers and students gave a TARC/SLI
  presentation to the parents and students of
  Dellview Elementary during their school Math and
  Science Night.
• Peter Bella, an Environmental Engineer, from the
  Alamo Area Council of Governments (AACOG) has
  been contacted to give a presentation about
  causes in ozone concentration levels. During the
  presentation Mr. Bella will provide relevance to
  the project by suggesting our rocket be used to
  confirm AACOGs ozone concentration computer
  models and predictions.
• For the third year, our students will help out
  with Science day at Longs Creek Elementary and go
  to Wilshire Elementary, too.
•  

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Mark Twain Atmospheric Sounding Rocket Design
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Rocket Flight Stability
Rocket Stability Margin CG Location is
65.3170 CP Location is 75.1174 The Mark Twain
II Is stable by a margin of 1.78
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Motor Selection Comparisons
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Altitude RockSim Data
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Acceleration RockSim Data
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Velocity RockSim Data
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Parachute Sizes and Descent Rates

• Dual Deployment System
• 36 in. drogue parachute
• 100 in. main parachute
• Velocity at Landing 19.0959 ft/s

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Launch Guide Data

• Launch guide length96.0000 in.
• Velocity at launch guide departure54.6402 ft/s
• The launch guide was cleared at 0.36 Seconds
• User specified minimum velocity for stable
  flight 43.9993 ft/s
• Minimum velocity for stable flight reached at
  64.5791 in.

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Test Plans and Procedures

• Altimeter Testing
• Reduce the air in the chamber until the altimeter
  reaches around 6000 ft.
• Altimeter will fire the first charge.
• Put back the air until the altimeter reaches 750
  ft.
• The second charge will fire.
• Recovery System Testing
• Put the rocket together and strap down the
  payload section to a table or a
• sawhorse.
• The altimeter will still be in the vacuum chamber
  so we can test the
• parachute recovery system.
• The safe distance will be 10 ft. from the rocket.
  
• The bottom of the rocket will separate from the
  payload section to its full
• length of the shock cord.
• Ozone data logger will turn on.
• Main parachute will come out of the nose section
  to its full length.
• All of this will be supervised by a certified
  level 3 NAR mentor.

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Payload Assembly
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Ozone Sensor Testing
AACOG Sensor
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Payload Design
Datalogger
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Payload Integration

• Payloads (control, scientific, and recovery) will
  be mounted on an assembly designed to slide in
  and out of the rocket airframe.
• Assembly will be constructed of wood, fiberglass
  cloth, and Epoxy and consist of two bulkheads at
  the ends, with a 2-sided, flat mounting surface
  spanning the length between the ends.
• Two bulkheads will be constructed such that they
  are snug with the inner diameter of the airframe
  to prevent movement during flight, but will still
  be able to be removed as a single unit when
  disassembling the rocket.
• Payloads will be mounted to the flat surface
  using shock mounts to minimize the stresses
  transmitted to the payloads during lift-off and
  landing.
• All electrical interconnects will be secured in a
  way to provide adequate stress relief while
  preventing inadvertent disconnects.
• Air flow to the ozone sensor will be achieved by
  a drilling a small hole in the airframe.
• The hole will also serve as the air pressure
  source for the altimeter.

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Mark Twain Scale Model
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Scale Model Time vs. Altitude
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Scale Model Time vs. Acceleration
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Scale Model Time vs. Thrust
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Scale Model Time vs. Velocity
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Safety

• The Krueger SLI team follows all safety
  precautions and directions provided in the MSDS
  sheets for potentially hazardous material used
  during rocket construction. All safety tables for
  risks hazards and failures can be found in our
  reports.