Design Review Corinne Desroches Saad Alqahtani Charles MacCraiger Alexa Warly Connor Jacobson Kyle Skjerven Matt Busby

Mission Overview Our mission that we have for our BalloonSat is to gather data on the wind speed at different altitudes with an anemometer to find the optimal altitude for an airborne wind turbine balloon, or an elevated wind turbine. We are doing this mission because the world needs renewable energy sources and airborne wind turbines offer efficient alternatives.

Requirements Flowdown Mission Statement: Find an optimal altitude for wind power generation Mission Objective: Record data on wind velocity that we can analyze and interpret LEVEL 0: We will use a bike computer to record wind velocities with an anemometer we will make, we will also make sure its under 850 grams Level 1.1: Internal data storage for the bike computer 1.2: Make sure the heater works properly 1.3: No anemometer interference with string tube Level 2.1: Bike computers internal power is enough for entire flight 2.2: The heater works and has enough power for the entire mission 2.3 Light weight cage for small impact protection of anemometer

DESIGN 10/2/11 15 cm cube structure Main Components: HOBO Heater Camera Bike Computer Rotating Cup Anemometer

DIAGRAM 1 10/2/11 Basic layout with main components

Anemometer Cage Will compose of a protective mesh shaped around 4 pillars Pillars will be 3 cm high Rotating Cup arms will be 3 cm long 10/2/11

Diagram 2 Top View with Anemometer and Protective Mesh 10/2/11

Bike System Magnet attached to spinning arm will align with magnet underneath the foam core. Every time magnets pass each other, the bike system will count one rep. 10/2/11

Diagram 3 Anemometer Close-Up with Magnet 10/2/11

Testing Whip tests-Attach the payload to a firm string and whip it in jerky back and forth motions to simulate the effects of burst on the satellite. Drop test- To see if the payload and its internal subsystems can endure the impact of the fall. This will be done by dropping the payload from a large balcony. Freeze tests- To make sure the payload can withstand internal temperatures of about -10 degrees Celsius at 30 km high. This will be done by placing the payload in a container with dry ice

Staircase test-To see if the satellite can withstand the crash Test the effectiveness of the anemometer in the wind tunnel. We are going to test our anemometer in a wind tunnel to see how many revolutions per minute we get during five, ten, and fifteen mph winds This will help us convert our readings from the bike computer into wind speed after the launch. Testing cont.

Electricity tests Make sure the on and off switch can consistently turn on the hobo, the anemometer, and all electric battery-run subsystems Power and electrical circuit- test multiple times Test the bicycle computers so data properly collected The camera will be tested to make sure the pictures come out well and can be taken properly Each sensor on the hobo will be tested for its function and we will make sure it can be transferred to Corinne’s computer correctly. Testing cont.

Project Manager Corinne StructureAnemometerSoftware and Electronics Kyle Matt Corinne Saad Matt Connor Charles Budget Manager Connor Charles Alexa Head of Testing Alexa

Expected Results Wind speed will increase with altitude Wind speed will reach a max (around 40,000ft), then steadily decrease Possibly wind will become very close to or equal zero at burst Altitude device will stop working

Biggest Worries Functionality of sensors at low temperatures Stability of computer components (sensor & magnets) Structural integrity of anemometer blades Meeting weight requirements Bike altimeter functionality at altitudes where no one has ever ridden

QUESTIONS? 10/2/11