Parabolic Food Aid Delivery System Manjaneeq Allison King Bader Asadallah University of the Pacific Stockton, CA 12/5/2002

Outline Problem Definition Approach (Design Process) Results Improvements Conclusions Acknowledgements

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 ramp Must be self triggering Can’t cost more the $20

Criteria Minimum weight Minimum size Maximum accuracy Launch the FAP over the wall

Project Objectives Build 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 work Use the design process

Launch Ramp and Target Area (Elevation View) PYTHON-INFESTED JUNGLE BOUNDARY 4 in 4 ft 8 ft START LINE FAP TARGET SPOT 6 ft 2 in 3.5 ft 10 ft Figure1

Launch Ramp and Target Area 2 ft 7 ft FAP TARGET SPOT START LINE 1 ft 2 ft FAP TARGET SPOT TRACK 1 TRACK 2 Piranha Infested River 3.5 ft 10 ft 6' 2" Wall 10 ft PYTHON-INFESTED JUNGLE BOUNDARY Figure 2

Preliminary Ideas Figure 3 Pros:Cons: StableNot much power Accurate triggerShort launch arm

Preliminary Ideas Figure 4 Pros:Cons: Long launch arm Might not have enough power More power then others Stable

Preliminary Ideas Figure 5 Pros:Cons: StableNo trigger Good powerHard to build

Preliminary Ideas Figure 6 Pros:Cons: AccurateHard to build StableNo 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

Construction Drilling holes

Construction First attempt

Construction Working on launch timing

Testing

Final Mechanism

Results Rank (?/37) Weight (lb) Length (in) Width (in) Height (in) Trial 1(ft)Trial 2 (ft)Trial 3 (ft) N/A 8.17 FOM Trial 1 FOM Trial 2 FOM Trial 3 FOM Final N/A Figure 8

Suggested Improvements Bungees Stronger metal rods Don’t use springs Smaller 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 King Daniel Holt Salem Al-Othman Engr 5 web page

Questions?