Colton Hall, Brendan Lee, David Thomas,Zak Collins, Eli Nelson, Devin Bazata

November 1, 2011

Team #7The Wright Stuff

Launch Readiness Review

Mission Overview

• Send up petri dishes containing bacteria

• Analyze the effects of temperature, pressure, and UV radiation on the bacteria

• Attempt to capture bacteria in tropopause in a sterile petri dish attached to a servo

Design Overview

Parallax Standard Servo Arduino Uno

• Arduino controls servo to deploy bacteria collection dish

• One petri dish sealed and in heated environment• One petri dish sealed and heated but exposed to UV• One petri dish unsealed, unheated, and exposed to UV

Design Overview

Cold Test

 

Test beginsCooler opened to observe servo position

Test ends

Vacuum Test

Bacteria Tests

• Bacteria confirmed to be "non-pathogenic"

• Bacteria incubated since last Wednesday

• Difficulty in having bacteria actually grow during incubation

• Sterile petri dish was also incubated, and it yielded no bacteria

Structural Tests: Whip, Stair, Drop

Predicted Results

• The bacteria in the two petri dishes exposed to the environment will not survive.

• The bacteria in the petri dish housed inside the satellite will survive.

• We will be able to retrieve bacteria from the tropopause.

Biggest Worries

• Contamination of the Collection Dish

• The reliability of the seal on the petri dish controlled by the servo motor.

• Properly separating variables; maintaining a constant temperature and a constant pressure inside the dish, etc.

Requirement Compliance

 

Requirement Requirement Met

Mission: test how bacteria survives in near space

Four petri dishes containing E. Coli

Mission: capture bacteria in tropopause

Sterile petri dish attached to servo to collect bacteria

Measure temperature and humidity

HOBO datalogger flown in BalloonSat

Control the servo for deployment in tropopause

Arduino Uno program will control the servo

Heat interior and two petri dishes to temperature of -10 degrees Celsius

Heater system included