Group 2

Sunny Wicks, Rebecca Sampson, Nikki Akraboff, Ellis

Langford, Garret Crandall

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

Final Design Snapshots

Final Design Snapshots

Final Design Snapshots

Final Design Snapshots

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

Aerodynamic Analysis

Aerodynamic Analysis

Aerodynamic Analysis

Hooray! The Lift needed is less than the Lift Max!

maxmax )( VgL Heair

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

ConclusionConclusion

:-D:-D