JAKE BINNEY JAMEY GRAHAM LOUISE MARTINEZ JACK OAKES MARCUS RAHIMPOUR ERIN TUCKER JAKE BINNEY JAMEY GRAHAM LOUISE MARTINEZ JACK OAKES MARCUS RAHIMPOUR ERIN TUCKER 12/05/06

Justice League Satellite 2 Design

12/05/06 Justice League Satellite 3 Primary Mission The Primary Mission of the Justice League is to design, implement and evaluate an onboard drag driven generator with the ultimate goal to power onboard BalloonSat systems, replenish battery charge to extend payload operations, and reduce the need of high volume battery banks. The Primary Mission of the Justice League is to design, implement and evaluate an onboard drag driven generator with the ultimate goal to power onboard BalloonSat systems, replenish battery charge to extend payload operations, and reduce the need of high volume battery banks.

12/05/06 Justice League Satellite 4 Mission Successes Full Mission Success – Wind power generated during ascent is sufficient to fully power satellite during mission. Full Mission Success – Wind power generated during ascent is sufficient to fully power satellite during mission. Partial Mission Success - Wind power generated during ascent is limited, and will only power some functions. Partial Mission Success - Wind power generated during ascent is limited, and will only power some functions. Minimal Mission Success – Wind power is generated during ascent. Minimal Mission Success – Wind power is generated during ascent.

12/05/06 Justice League Satellite 5 Mission Results The main experiment of Project Windryder was classified as minimal mission success. However, secondary experiments performed relatively well as designed and fully met our expectations for mission success. The main experiment of Project Windryder was classified as minimal mission success. However, secondary experiments performed relatively well as designed and fully met our expectations for mission success.

12/05/06 Justice League Satellite 6 Expected Voltage Results After testing and calculations, our group expected to generate a maximum voltage of around 4.5 volts. Also, we expected to see a definite drop in voltage produced as Windryder ascended. After testing and calculations, our group expected to generate a maximum voltage of around 4.5 volts. Also, we expected to see a definite drop in voltage produced as Windryder ascended.

12/05/06 Justice League Satellite 7 Voltage Experiment Results The onboard drag driven generator produced a small amount of voltage due to a slow ascent. At an altitude of around 7000m, the voltage dropped due to the atmosphere air containing less molecules than ground level air. Simply put, there was no drag to drive the generator.

12/05/06 Justice League Satellite 8 Voltage Analysis Project Windryder succeeded, but our original tests over-estimated the voltage output. During the testing phase, we estimated a 4.5v output at 2000 RPM’s. During flight, Windryder obtained a max.25v, meaning 170 RPM’s. Project Windryder succeeded, but our original tests over-estimated the voltage output. During the testing phase, we estimated a 4.5v output at 2000 RPM’s. During flight, Windryder obtained a max.25v, meaning 170 RPM’s. The voltage drop trend was accurate to our predictions The voltage drop trend was accurate to our predictions Minimal Mission Success – Wind power is generated during ascent. Minimal Mission Success – Wind power is generated during ascent.

12/05/06 Justice League Satellite 9 Voltage Vs. Altitude 7000m At 7000m, the atmospheric pressure is approximately.3atm, a third of that at launch. This altitude places the Balloonsat near the Tropopause.

12/05/06 Justice League Satellite 10 Expected Temperature Results Testing showed that the temperature inside of Windryder would hover around freezing point, and dip below near the heart of the mission. Testing showed that the temperature inside of Windryder would hover around freezing point, and dip below near the heart of the mission. External temperature was expected to be about -80. External temperature was expected to be about -80.

12/05/06 Justice League Satellite 11 Temperature Results External Temperature (Green) dropped to below -70 degrees and rose back up to about -10 as the balloonsat enters the Ozone layer. Internal Temperature stayed near 0 degrees with + or – 10 degree fluctuations.

12/05/06 Justice League Satellite 12 Temperature Analysis Tests showed the expected internal temperature and the actual internal temperature were very close and the testing was accurate. Tests showed the expected internal temperature and the actual internal temperature were very close and the testing was accurate. External temperature varied due to the Ozone Layer; instead of a constant -80, the external temperature rose during the middle of the mission. This was expected but not tested. External temperature varied due to the Ozone Layer; instead of a constant -80, the external temperature rose during the middle of the mission. This was expected but not tested.

12/05/06 Justice League Satellite 13 Secondary Experiment Results Windryder’s secondary experiments returned exactly what we had designed them to do. The digital camera flown took pictures of ascent and descent, the ELPH only ascent due to film. Both HOBO’s recorded data for longer than needed. When Windryder was picked up at the recovery site, the box was still warm from the heater. Windryder’s secondary experiments returned exactly what we had designed them to do. The digital camera flown took pictures of ascent and descent, the ELPH only ascent due to film. Both HOBO’s recorded data for longer than needed. When Windryder was picked up at the recovery site, the box was still warm from the heater.

12/05/06 Justice League Satellite 14 Camera Images (ELPH) Broken Globo-Gym Satellite

12/05/06 Justice League Satellite 15 Camera Images (Digital) Ascent Descent Max Rate: 7.8 m/s Max Rate: 50.5 m/s

12/05/06 Justice League Satellite 16 Camera Images (Digital)

12/05/06 Justice League Satellite 17 Ready to Fly Requirements After recovery, no structural damage. After recovery, no structural damage. No needed changes to structure or insulation.No needed changes to structure or insulation. Only changes to current Windryder to fly tomorrow would be: Only changes to current Windryder to fly tomorrow would be: New batteries for timing circuit and camerasNew batteries for timing circuit and cameras New film for ELPH CameraNew film for ELPH Camera Cleared SD card for Digital CameraCleared SD card for Digital Camera

12/05/06 Justice League Satellite 18 Ready to Fly in 6 Months Only new items needed would be batteries for cameras, timing circuit, and heater. Only new items needed would be batteries for cameras, timing circuit, and heater. Fan and other structure could be stored indefinitely. Fan and other structure could be stored indefinitely.

12/05/06 Justice League Satellite 19 Experimental Conclusions A drag driven generator, while noble in design and potential benefit to spacecraft EPS, is just impractical. A drag driven generator, while noble in design and potential benefit to spacecraft EPS, is just impractical. The amount of weight it would take to integrate enough drag driven generators to create an acceptable output would exceed reasonable weight requirements and still would not produce enough voltage to power a spacecraft for a full mission. The amount of weight it would take to integrate enough drag driven generators to create an acceptable output would exceed reasonable weight requirements and still would not produce enough voltage to power a spacecraft for a full mission. The amount of atmosphere that actually can create drag on the fan is miniscule compared to the orbiting altitude of any spacecraft. At a speed that could create enough voltage, this atmosphere would dissipate almost instantaneously. The amount of atmosphere that actually can create drag on the fan is miniscule compared to the orbiting altitude of any spacecraft. At a speed that could create enough voltage, this atmosphere would dissipate almost instantaneously.

12/05/06 Justice League Satellite 20 Lessons Learned We have learned the importance of getting things done ahead of time, and making sure everything was done correctly. We have learned the importance of getting things done ahead of time, and making sure everything was done correctly. Hard work definitely pays off when it comes to getting all the kinks worked out on the ground. Hard work definitely pays off when it comes to getting all the kinks worked out on the ground. We should have gotten the whole box together sooner to run more tests. We should have gotten the whole box together sooner to run more tests.

12/05/06 Justice League Satellite 21 Message to Next Year Things need to be done on time Things need to be done on time If you fall behind, then everything following will too.If you fall behind, then everything following will too. You will regret re-building the box the week before launch.You will regret re-building the box the week before launch. Get to know your team Your team is your greatest asset.Your team is your greatest asset. Problems with team members should be addressed promptly.Problems with team members should be addressed promptly. Get involved in your project Get involved in your project If you don’t get involved you will learn nothing and have no idea how anything works on your satellite.If you don’t get involved you will learn nothing and have no idea how anything works on your satellite. As soon as possible, you should be able to tell anyone anything there is to know about your satellite.As soon as possible, you should be able to tell anyone anything there is to know about your satellite. 

12/05/06 Justice League Satellite 22 Questions?