1 treds the hard boilers: chris chapman megan kalend see vang engr 5 university of the pacific
Post on 20-Dec-2015
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TRANSCRIPT
1
TREDS
The Hard Boilers:Chris ChapmanMegan Kalend
See Vang
ENGR 5University of the Pacific
2
Overview
• Problem
• Approach
• Results
• Improvements
• Conclusions
• Acknowledgements
3
Problem
• Refugees inhabiting a region across a thirty-foot wide river are in need of eggs. These must be delivered across the rebel-patrolled waters.
4
Constraints
• Size requirements
• Timed delivery
• Range
• Target restrictions
• Egg delivered intact
• Cost efficiency
5
Approach
• Preliminary Ideas
• Refinement
• Analysis
• Implementation
• Testing
6
Preliminary Ideas
• Catapult or Trebuchet?– Pros– Cons
• EPU– Materials– Shape
7
Catapult Refinement
• Implemented elastic power source in place of counterweight– Pros
– Cons
8
EPU Refinement
• Material:
–Armaflex® rubber insulation
• Shape:
–Modified barbell
9
Analysis• Conservation of Energy
• Elastic Energy
elasticelastic KEPE
22
2
1
2
1initialmvkx
10
Analysis
• Projectile motion
ygvvinitialfinal yy 22
tgvvinitialfinal yy
tvxinitialx
11
Implementation
• Using Laws of Conservation
• Logical Estimation
• Preliminary Platform
12
Testing
• Trial Setup
13
Results
• Final design
• Competition performance
• Analysis
14
Successful Trial DataTrial Number
Radial Distance from Center (ft., in.)
1 0 ft. 1 in.
2 5 ft. 9 in.
3 3 ft. 1 in.
4 4 ft. 0 in.
5 4 ft. 0 in.
6 4 ft. 0 in.
7 4 ft. 4 in.
8 2 ft. 11 in.
9 5 ft. 1 in.
10 0 ft. 9 in.
11 5 ft. 4 in.
12 3 ft. 7 in.
13 0 ft. 6 in.
15
Future Improvements
• Time Constraints– Allow for scheduling problems and last-minute
system checks
• Optimization– Optimize system in each step of design and
construction process
• Efficiency– Solve glitches to create a more effective
TREDS.
16
Conclusions
• Constraints and Criteria• Final Design• Competition Performance• Improvements
• Any Questions???
17
Acknowledgements
• Mr. Jared Lash of Saint Mary’s High School
• Michael Kalend