December 10, 2002 We Fling Foo 1

We Fling FooParabolic Food Aid Delivery System(PFADS)

By

Rob Berkeley

Chris Giuffra

University of the Pacific

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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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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Introduction

• Constraints– Weight– Size– Cost

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Introduction

• Criteria– Accuracy– Weight– Consistence

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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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Preliminary Design

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• Advantages– Simple structure– Easily adjustable– Low cost to build

• Disadvantages– Possibly heavy– Catapult arm breakable

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• Advantages– Potentially very accurate– Easy angle adjustment– More stability

• Disadvantages– Harder to build– More difficult to create release mechanism

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• Advantages– light weight– Reliable release mechanism– Accuracy

• Disadvantages– Strength– High center of gravity

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Refinement

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Refinement

• Box holder

• Catapult design

• Release mechanism

• Elastic band

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Decision

• Design that worked best

• No wheels

• Weight on back

• Change angle of release

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Decision

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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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Improvements

• Better angle adjustment

• Stronger design

• Lower center of gravity

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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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Acknowledgements

Dana

Kristel

UOP Machine Shop