Post on 20-Dec-2015
Team D.A.N.K.TREDS DesignNovember 29, 20053601 Pacific Ave.Stockton, CA 95211
Travis DamasoScott AkersZachary KimuraNick Nelson
Presentation Outline
1. Introduction
2. Background
3. Procedure
4. Analysis
5. Testing
6. Results
7. Discussion
8. Conclusion
Introduction
Problem Developing country lacks fresh eggs
Solution Design and build a Trans-River Egg Delivery
System (TREDS)
Background
Project Constraints 30 foot wide river 10 foot diameter target
zone 72 inch maximum
dimensional sum $20.00 budget Time No prefabricated
materials
Project Criteria Tools available Cheap materials Safe Simple Environmentally safe Not noisy
Procedure Preliminary Ideas
Launcher Pros Cons
Ballista Lateral accuracyLong distancesCompact design
ComplexityDifficult materialsSpring deformationTransportation
Catapult Simple designSimple launch platformPrior knowledge of construction
Hard to modify powerUnoriginal
Trebuchet Easy to modify powerPortabilityEasy reconstructionOriginality
Size limit affects power
Procedure (cont’d)
EPU Pros Cons
Straws CheapBendable
Breaks easilyNot trebuchet material
Floam MoldableCompact
Expensive
Marshmallows SquishyDeliciousCheap
Could get stale
Analysis
Win Trebstar 4.05 Computer program used
to derive dimensions Guess & Check
Complex trebuchet calculations
Win Trebstar 4.05 Program
Testing
Date Result
October 25, 2005 Launched 5 applesTraveled: 5 ft, 7 ft, 3 ft, 10 ft, and 3 ft
November 8, 2005 Weight doubledKiwis flown to maximum 23 feet
November 12, 2005 Longer moment armSling addedKiwis travel 10 feetEPU travels 15 feet
November 14, 2005 Weight increased to 25 lbSling shortenedEPU flown 31 feet
November 15, 2005 EPU traveled 28-32 feet
Competition Results
Disqualification Over the 72 inch size limit
Performance of EPU Both eggs intact
Performance of Trebuchet Wire trigger lowers distance PVC construction failure
Conclusion
Suggested Improvements Improved trigger system Improved stability Stronger moment arm Stay within size limit
Huevos Deliverer’s Team D.A.N.K.
Accuracy 0.1 ft from center 12.3 ft from center