Parabolic Food Aid Delivery System Manjaneeq Allison King Bader Asadallah University of the Pacific...

Parabolic Food Aid Delivery System

Manjaneeq

Allison KingBader AsadallahUniversity of the PacificStockton, CA12/5/2002

Outline

Problem DefinitionApproach (Design Process)ResultsImprovementsConclusionsAcknowledgements

Introduction

Mobile parabolic food aid delivery system Refugees surrounded by a piranha-

infested river Mountainous jungles full of wild

dangerous creatures Goal is to get food to refugees

Constraints

No bigger then 18”x18”x18” 10 pounds Must sit behind a line 12 inches from the top of the rampMust be self triggering Can’t cost more the $20

Criteria

Minimum weightMinimum sizeMaximum accuracy Launch the FAP over the wall

Project ObjectivesBuild a food delivery system It has to catapult a food aid into the refugee camp Camp walls are 6 feet 2 inches It must launch a distance of 10 feet Has to launch a 7 ounce box

Project Objectives (cont.)

Group workUse the design process

Launch Ramp and Target Area (Elevation View)

PYTHON-INFESTED JUNGLE BOUNDARY

4 in

4 ft 8 ft

STARTLINE

FAP TARGET SPOT

6 ft 2 in

3.5 ft

10 ft 10 ft

Figure1

Launch Ramp and Target Area

2 ft

7 ft

FAP TARGET SPOT

STARTLINE

1 ft

2 ft

FAP TARGET SPOT

TRACK 1

TRACK 2

Piranha Infested

River

3.5 ft10 ft

6' 2" Wall

10 ft

PYTHON-INFESTED JUNGLE BOUNDARY

Figure 2

Preliminary IdeasFigure 3

Pros: Cons:Stable Not much powerAccurate trigger Short launch arm

Preliminary IdeasFigure 4

Pros: Cons:

Long launch arm Might not have enough powerMore power then othersStable

Preliminary IdeasFigure 5

Pros: Cons:Stable No triggerGood power Hard to build

Preliminary IdeasFigure 6

Pros: Cons:Accurate Hard to buildStable No trigger

Decisions

The only one that all parts logically worked Felt springs were more accurate Good trigger Connected to FAP longest

Refinements

Adding extra springs Add block of wood where trigger hits Extending arms that hold the FAP Bending angle of arms positioning

ConstructionDrilling holes

ConstructionFirst attempt

ConstructionWorking on launch timing

Testing

Testing

Final Mechanism

ResultsRank (?/37)

Weight (lb)

Length (in)

Width (in)

Height (in)

18 6 17.25 11.75 12.5

Trial 1(ft) Trial 2 (ft) Trial 3 (ft)

N/A N/A 8.17

FOM Trial 1

FOM Trial 2

FOM Trial 3

FOM Final

N/A N/A 43.58 43.58

Figure 8

Suggested Improvements

BungeesStronger metal rodsDon’t use springsSmaller wheels

Conclusion

Springs don’t have enough force to make the PFAP go over a 6 ft. wall Springs can make the 10 ft. length accurately Manjaneeq was too long to fit on the ramp, behind the yellow line

Acknowledgements

Professor KingDaniel HoltSalem Al-OthmanEngr 5 web page

Questions?