Hang SevenLaunch Readiness Review

Lucas Migliorini, Becca Lidvall, Paul Smith Chase Goodman, Ethan Hollenbach, Nikhil

Desai, Abby Caballero, Sierra Williams

November 26, 2012

Mission Overview

•Build three geiger counters•Measure Gamma Radiation as Altitude

Increases•Test the effectiveness of aluminum and carbon

fiber on reducing radiation levels

Design Overview

• Hexagonal Designo Centripetal Acceleration

• Foam Coreo Thermal Insulation

• Geiger Tubes o One will be covered with Carbon Fiber Tubingo One will be covered with Aluminum Tubingo One will not be covered, as a control

• Arduinoo Will control all sensors and Camera

External Diagram

Camera

On/Off-Arduino

Camera on/off

Internal Diagram

Camera

Arduino with Sensors

Geiger Counters(3)

Batteries

Heater

Test Results Part 1

Geiger Counters (Oscilloscope Reading):

Test Results Part 2

Other Internal:

KeyOrange -TemperatureGreen - HumidityBlue - PressureRed/Purple/Gray -

Accelerometer

KeyOrange=Accel XBlue=Accel YGreen=Accel Z

Sensor Test Cont.

Internal: Dry Ice Test

o Dry ice test results were

inconclusiveo We plan to look into the problem

and do more testing to ensure

that the internal components can

withstand the temperatures they

will be exposed to.

Test Results Part 3

Structural: Drop Test

o Two drop tests were performedo A few dents around the corners

after the first test were foundo A tear occurred after the second drop test on one of

the sidewallso The structure supported the maximum amount of

weight allowed

Structural: Kick Test

o One kick test was performedo Minimal damage was doneo The structure supported the

maximum amount of weight

allowed

Structural: Whip Test

o Two whip tests performedo No damage was foundo The structure supported the

maximum amount of weight

allowed

Structural: Test Conclusion

o The three different structural tests performed show that our structure will withstand the ascent and descent of the flight with minimal damage

Ground Ozone 30 km

Control 1 250 400 600

Aluminum 1 75 100 200

Carbon Fiber 1 150 200 300

Prediction

Biggest Worries

Hardware/Software

-Geiger Counter Failure

-Faulty Programing

-Sensor Failure

-Battery Life

Data

-Insufficient data

-Inaccurate data

-Inconsistent data

Level Number Requirements Fulfillment

0 1 Payload must ascend to an altitude of 30 kilometers via balloon Have not flown yet

0 2 Payload must store and collect data from our sensors With the exception of external temperature all

sensors have been tested and will store and

collect data

0 3 The payload mass must not exceed 1.125kg Our estimated total weight is around 1030g

0 4 The payload must be ready for launch by 1 December, 2012 It will be

0 5 The team and project must obey all safety precautions Yes, we have abided by all safety requirements

Requirements Checklist

Level Number Requirements Fulfillment

1 1 The payload must be able to hold all electronics and sensors All of our equipment fits within the satellite

1 2 The payload must contain a heater We made a heater which has been tested and

confirmed to work

1 3 The payload must contain a power source Success, we are using seven 9v batteries

1 4 The payload must be constructed solely of foam core We successfully constructed a hexagonal structure using foam core

1 5 The payload must contain three working geiger counters All three of our Geiger counting are functioning

correctly but the tubes are weak for low radiation

levels

1 6 Geiger counters will be shielded with different materials We have the aluminum tubing shielding one

counter and the carbon fiber has not yet been

added

1 7 An American flag will be attached to the BalloonSat We have our American Flag that is to be attached

to the BalloonSat

Level Number Requirements Fulfillment

2 1 The internal temperature of the payload must not drop below -10° celsius Our insulation is thick enough for our internal

temperature to not drop below -10° Celsius

2 2 The Geiger counters will be connected to the Arduino microcontroller The Geiger counters are connected to the Arduinos

so we can store data

2 3 One Geiger counter will be used as a control for radiation measurement One of our Geiger counters are not going to be covered by a material

2 4 The structure will be sturdy enough to survive the ascent and descent The structure is sturdy enough to survive the ascent and descent as

proven by testing

2 5 The Arduino microcontroller will be programmed to collect information Both of our Arduinos are programmed to collect the data from the sensors and

Geiger counters

2 6 Aluminum and carbon fiber tubes will each be used to shield one Geiger counter from radiation

We have the materials and Geiger counters in order

to shield and test the effectiveness of each

material

Level Number Requirements Fulfillment

3 1 The measurements from the Geiger counters will be plotted as to look for trends

After our mission, we will plot our data to observe trends

3 2 The structure will be a hexagonal shape for strength and the generation of centripetal force

Our structure is a hexagonal shape

3 3 Homemade Geiger counters will be calibrated to an industry standard Geiger counter

Our Geiger tubes do not detect low levels of radiation well so we calibrated them to the best of our ability