PARABOLIC FOOD AID DELIVERY SYSTEM

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PARABOLIC FOOD AID DELIVERY SYSTEM
TIM JONES NHAN NGUYEN
School of Engineering and Computer
Science University of the Pacific Fall 2002
ENGR 5 Lab Section 3
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OVERVIEW

• Introduction
• Constraints Criteria
• Project Objectives
• Approach Design Process
• Discussion of Results
• Suggested Improvements
• Conclusions
• Acknowledgements

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INTRODUCTION

• Purpose design a mechanism to launch a Food Aid
  Package over a wall to a designated point

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CONSTRAINTS

• Volume?18x18x18 inches
• weight?10 lbs.
• Cost?20
• No motors or propellants

• 1 minute to set up
• start behind the line

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CRITERIA

• Minimize size
• Minimize weight
• Maximize accuracy

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PROJECT OBJECTIVES
PYTHON-INFESTED JUNGLE BOUNDARY
Start line
6 ft 2 in
FAP TARGET SPOT
4 in
3.5 ft
10 ft
10 ft
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PRELIMINARY IDEAS
Preliminary Idea 1 Catapult
Preliminary Idea 2 Cannon
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PRELIMINARY IDEAS (CONTINUED)
Preliminary Idea 3 Slingshot
Preliminary Idea 4 Mouse trap
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REFINEMENT

• PROS
• enough force
• accurate

rubber band
FAP
PFADS

• CONS
• dimensions
• fall into infested river

wheels
Preliminary Ideas 1 Catapult
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REFINEMENT (CONTINUED)

• PROS
• enough force
• easy to construct

rubber band
FAP
PFAD

• CONS
• durability of elastic band
• height may exceed
• inaccurate

wheels
Preliminary Ideas 3 Slingshot
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DECISION
trigger
screws
FAP
rubber band
wheels
Preliminary Idea 3 Slingshot
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CONSTRUCTION
screws
wheels
copper bars
springs
copper bars
Gathered the materials
Cut the bars to length
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CONSTRUCTION (CONTINUED)
screws
copper bar
wheels
Soldered the frame together
Screwed on the wheels
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CONSTRUCTION (CONTINUED)
copper wire
______
___
copper bar
____
spring
_____
wood
Attached the springs
Developed a triggering device
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TESTING
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FINAL MECHANISM
hook
screw
screws
arm band
arm bar
springs
___________
hinge
ice trays
trigger
wheels
Side View Catapult
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FINAL MECHANISM (CONTINUED)
FAP
Length26.5 in Width15.5 in Height9.75
in Weight4 lbs
arm bar
springs
ice trays
wheels
Front View Catapult
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RESULTS

• 1st Trial Did not launch
• Hook would not attach to PVC pipe
• 2nd Trial Did not launch
• Hook would not attach to PVC pipe
• 3rd Trial Did not launch
• Container ripped

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RESULTS (Continued)

• Advantages
• Weight
• Went down the ramp

• Disadvantages
• Exceed dimension limit
• Did not launch the package in any of the three
  trials

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SUGGESTED IMPROVEMNTS

• Stronger structures
• Smaller dimensions
• More durable container
• Time Management

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CONCLUSION

• constraints 18x18x18 volume

• criteria size, weight, and accuracy.

• final design catapult.

• Performance poorly due to error in design

• suggested improvements stronger structures and
  smaller dimensions.

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ACKNOWLEDGEMENTS

• Professor Camilla Saviz Kurt Schulz
• Employees at Home Depot

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