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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?