december 10, 2002 we fling foo 1 we fling foo parabolic food aid delivery system(pfads) by rob...
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December 10, 2002 We Fling Foo 1
We Fling FooParabolic Food Aid Delivery System(PFADS)
By
Rob Berkeley
Chris Giuffra
University of the Pacific
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December 10, 2002 We Fling Foo 2
Outline• Introduction
• Project Objectives
• Preliminary Ideas
• Refinement
• Decision/Implementation
• Construction & Testing
• Results
• Improvements
• Conclusion
• Acknowledgments
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December 10, 2002 We Fling Foo 3
Introduction
• To build a scale model of a PHADS that will carry a Food Aid Package (FAP).
• It will have to roll down a hill, hit a wall, and then launch a FAP into a village over a mountain.
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December 10, 2002 We Fling Foo 4
Introduction
• Constraints– Weight– Size– Cost
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December 10, 2002 We Fling Foo 5
Introduction
• Criteria– Accuracy– Weight– Consistence
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December 10, 2002 We Fling Foo 6
Project Objectives
• Roll Down Ramp
• Throw a Food Aid Package over a 3.5’ gap and over a 6’2” wall and land on an X
• Do not exceed target point
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December 10, 2002 We Fling Foo 7
Preliminary Design
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December 10, 2002 We Fling Foo 8
• Advantages– Simple structure– Easily adjustable– Low cost to build
• Disadvantages– Possibly heavy– Catapult arm breakable
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December 10, 2002 We Fling Foo 9
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December 10, 2002 We Fling Foo 10
• Advantages– Potentially very accurate– Easy angle adjustment– More stability
• Disadvantages– Harder to build– More difficult to create release mechanism
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December 10, 2002 We Fling Foo 11
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December 10, 2002 We Fling Foo 12
• Advantages– light weight– Reliable release mechanism– Accuracy
• Disadvantages– Strength– High center of gravity
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December 10, 2002 We Fling Foo 13
Refinement
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December 10, 2002 We Fling Foo 14
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December 10, 2002 We Fling Foo 15
Refinement
• Box holder
• Catapult design
• Release mechanism
• Elastic band
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December 10, 2002 We Fling Foo 16
Decision
• Design that worked best
• No wheels
• Weight on back
• Change angle of release
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December 10, 2002 We Fling Foo 17
Decision
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December 10, 2002 We Fling Foo 18
Results
• First and second time– Did not go over wall– Did not flip over into river– Released package
• Third time without wall– Went down ramp and released package very
close to X.
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December 10, 2002 We Fling Foo 19
Improvements
• Better angle adjustment
• Stronger design
• Lower center of gravity
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December 10, 2002 We Fling Foo 20
Conclusion
• Overall it performed well even though it did not go high enough
• Operated in a satisfactory way
• Need a way to adjust angle more precisely
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December 10, 2002 We Fling Foo 21
Acknowledgements
Dana
Kristel
UOP Machine Shop