Group 2 Sunny Wicks, Rebecca Sampson, Nikki Akraboff, Ellis Langford, Garret Crandall
Dec 19, 2015
Objective of Presentation
• To present our finalized design and receive constructive input
• To make clear our motives for altering our preliminary design
• To back up our design with aerodynamic analysis
Final DesignFinal Design
• One main truss
• 2 balloons
• One back stabilizer
• Hanging motor arrangement
Aerodynamic AnalysisWeight
Balsa Truss .0387 kg
Motor Assembly .2864 kg
Its counterweight .05031 kg
Servo Set .0806 kg
Battery Pack .156 kg
Balloons .14 kg
Servo Battery Assembly
.0883 + .0399 = .1282 kg
Stabilizer ~.02 kg
Total Mass*9.8m/s^2 8.822 N
Design Evolution and AnalysisDesign Evolution and Analysis
Total design overhaul…Total design overhaul… Our design changed mainly because Our design changed mainly because
we directed our focus from creatively we directed our focus from creatively thoughtful to practicalthoughtful to practical
We realized that although many We realized that although many other arrangements of balloons and other arrangements of balloons and propellers might theoretically work propellers might theoretically work exceedingly well, if we couldn’t build exceedingly well, if we couldn’t build it, it wouldn’t workit, it wouldn’t work