The Pacific Launchers1 Parabolic Food Aid Delivery System (PFADS) The Pacific Launchers Ryan Liu & Michael Nguyen University of the Pacific ENGR 5 December 2002

The Pacific Launchers2 Overview Introduction Constraints & Criteria Method/Approach (Design Process) Testing Results/Findings Conclusions Recommendations

The Pacific Launchers3 Introduction Designated to design and build a mobile parabolic food aid delivery system (PFADS) that would launch a Food Aid Package down an inclined ramp.

The Pacific Launchers4 Our Objective: To construct model of PFAD using the Design Process. Learn presentation skills. Group Dynamics & teamwork skills.

The Pacific Launchers5 The Launch Area Fig 1. Launch Ramp and Target Area (Elevation View) Fig 2. Launch Ramp and Target Area (Plain View)

The Pacific Launchers6 Constraints Criteria Dimensions: 18 x 18 x 18 in. Weight Max: 10 lbs. Cost under $20. Traverse down the ramp on its own. Remain behind barrier upon impact. Light Weight/Small. Efficient/Effective. Low Cost. Accurate

The Pacific Launchers7 The Design Process Pros Accurate Easy Construction Cons Too Heavy Meet Constraints?

The Pacific Launchers8 The Design Process (Cont.) Pros  Small, light weight  Cheap  Simple Design Cons  Not accurate  Don’t have enough force to launch FAP  Trigger device, not sufficient

The Pacific Launchers9 The Design Process (Cont.) Pros  Accurate  Trigger device is sufficient  Light weight Cons  Might be too big  Supplies may be hard to find  Not enough energy to launch FAP

The Pacific Launchers10 The Design Process (Cont.) Reasons for choosing design: 1.Very Effective trigger device. 2.Efficient launching platform. 3.Stable and sturdy. 4.Launching device is powerful. 5.Light weight. 6.Material availability.

The Pacific Launchers11 Final Design

The Pacific Launchers12 Construction of Final Design Constructed of: –Metal Strip (Antenna) –Springs –Cup Hooks/Screws –Wood (Dowel, Straight) Steps of Construction: 1.Construction of body. 2.Launch mechanism arm. 3.Addition of wheels & launcher. 4.Placement of trigger (dowel). 5.Construction of holder.

The Pacific Launchers13 Testing Test 1 Error: PFADS model didn’t stay on ramp. Test 2 Error: FADS didn’t stay on launching mechanism. Test 3 Error: FADS didn’t have enough energy to put over wall. Test 4 Error: Trigger device wasn’t sufficient enough.

The Pacific Launchers14 Final Mechanism After Implementation

The Pacific Launchers15 Results/Discussion Ranked 22 nd out of 36 groups. Final FOM score of FAPS did not make it over wall. Launched the 2 nd time only. Performance in Competition:

The Pacific Launchers16 Results/Discussion (Cont.) Advantages: –Durable. –Light. –Small. Disadvantages: –Release mechanism not strong. –Wheels made FAP fall off holder. –Not very strong launcher.

The Pacific Launchers17 Conclusion PFADS constructed by ENGR 5 Pacific Launchers. Purpose to launch FAPS over a wall into a target. Incorporated Group Dynamics and the Design Process.

The Pacific Launchers18 Conclusion (Cont.) Met most design constraints. –Fit max dimensions (16” x 7.75” x 10”). –Did not tip over barrier upon impact. –Under max weight of 10 pounds (3 pounds). Proved to be small and light. But not powerful.

The Pacific Launchers19 Recommendations Set catapult arm to have proper launch angle. Take out rear wheel. Steady launch holder. Stronger launching mechanism. –Springs with greater tension. Correction of unsteady/uneven wheels. –Rolls straight down ramp.

The Pacific Launchers20 Acknowledgements Professor Kurt C. Schulz Group Members: Santos Ortega & Kasandra Appleby