SPIRIT of the Koala Project VOLT Critical Design Review Anthony Anglin, Colin Harkins, Dylan Cooper, Thomas Jefferies, Starteya Pais, Joao Mansur, Andrew Trujillo, Dustin Fishelman

Mission Overview  Prove the feasibility of using the flow of atmosphere across the surface of the BalloonSat to generate current  Expect to discover that using magnets and the spin of the satellite will generate current  We predict variation in the levels of current that will be generated  We are conducting this mission to determine the feasibility of using wind to power experiments in future BalloonSats

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Design Overview  Bearings will allow BalloonSat to rotate independently of the flight tube  Magnets attached to the flight tube will rotate within a coil of wire, generating electric current  Current and voltage generated will be measured and recorded  Fins attached to the outside of the cube will be used to increase the amount of air flow

Ordered Parts  Ordered parts include:  Neodymium magnets  Sealed, ceramic, stainless steel ball bearings  Current and voltage sensor  Order Status:  Magnets: Ordered, received  Bearings: Ordered, received  Current Sensor: Ordered, received

Drawings

Block Diagram

Mass Budget HardwareWeight (g)QuantitySubtotal Bearings Magnets Current Sensor111 Arduino30260 Ardunio Shield30260 Copper Wire34.81 Accelerometer111 Pressure Sensor111 Temperature Sensor122 GoPro1671 Camera1301 Humidity Sensor111 Batteries Totaln/a

Economic Budget HardwareCostQuantityS/HSubtotal Bearings Magnets Current Sensor Totaln/a

Schedule  September 28th – Turn in proposal (4:00 pm)  September 30th - Team Meeting  October 2nd – CoDR Presentations  October 3rd – Team Meeting  October 4th – Order all the hardware  October 5th – Authority to Proceed October 7th – Finalize design + Team meeting  October 10th – Team meeting  October 13th – Acquired all hardware  October 14th – Begin construction + Team meeting  October 17th – Team meeting  October 18th – Design Document Rev A/B (7:00 am) + pCDR Slides Due (7:00 am)  October 21st – Team meeting  October 28th – Testing Day + Team meeting  November 4th – Finalize programming + Team meeting  November 7th – Team meeting  November 13th – In-Class demo  November 14th – Team meeting  November 16th – Design Document Rev C  November 18th – Team meeting  November 25th – Finalize satellite and prep for launch  November 27th – LRR Slides Due (7:00 am)  November 28th – FINAL Team meeting  November 30th – Final Weigh-in  December 1st – Launch day  December 8th – ITLL Design Expo + Design Document Rev D Due + Extra Credit Video  December 11th – Final Presentations and Reports

Proposal Requirements  Our BalloonSat will generate electricity, powered by the rotation of the BallonSat  Using magnets rotating through coils of wire  A GO PRO video camera will be used to image the flight  Attached inside of cube opposite of the camera  BalloonSat will be recovered  GPS and the string will keep them all attached and able to be discovered  Flight String will attach to the BalloonSat through a PVC pipe  Must be tied very tightly to ensure the pipe does not spin, only the cube  Temperature will remain above -10 degrees Celsius  Through dry ice testing and multiple layers of insulation  Weight will not exceed 1125 grams  Our weight budget shows we will not exceed  A three axis accelerometer will be used to measure acceleration during the flight  Shown in our block diagram, will be attached to Arduino

Proposal Requirements 2  Design will allow for an Arduino UNO and related components  Shown in our block diagram and drawings  External temperatures will be measured  Shown in block diagrams  Canon A570IS will be used to image the environment  Placed facing outwards, opposite side of GO Pro  An active heater system will be used to maintain interior temperature  Shown in our block diagram  A visual indicator on the exterior of the BalloonSat will allow SOK to confirm that the payload ready is for launch  Will use an LED light attached to the inside to indicate launch preparedness

Test Plan  Tests will include drop tests, cooler tests, subsystems tests, functional tests, whip tests, and mission simulation tests  Will experiment with different fin types to conclude which one will create the most drag and spin  Mission Simulation will include spinning the cube by hand, and taking it to the wind tunnel for testing  Already have done drop at DLC and some whip tests  Future tests will include dry ice cooling, and more whip tests

Test Schedule  October 7 th – Drop Test  October 21 st – Spin Test  October 28 th – Sensor Testing (Pressure, humidity, accelerator, temperature)  November 4 th – Functional Test (Generator testing)  November 11 th – Subsystem Test (External and internal)  November 18 th – Cooler Testing  November 25 th – Mission Simulation Test

First Draft Thoughts  Expect to see spin created by the fins and the rotation on the BalloonSat  From this spin there will be evidence of current and voltage created  Will show that we can supply voltage for most of the experiment, but not entirely  Results will prove that using the rotation is a sufficient method of running an experiment

Organization Chart Name: Major: Task:  Andrew Trujillo Astrophysics Researcher  Starteya Pais Aerospace Engineering Researcher/Secretary  Joao Mansur Aerospace Engineering Researcher/ Solderer  Thomas Jeffries Aerospace Engineering Team Leader/Budget Manager  Colin Harkins Open Option Engineering Secretary/Structural Design  Dustin Fishelman Aerospace Engineering Coordinator/Structural Design  Dylan Cooper Aerospace Engineering Lead Programmer  Anthony Anglin Aerospace Engineering Coordinator/Researcher

Biggest Worries  Will not generate current  Magnets will not properly rotate through coils  Not enough spin during flight  Fins will break off