Interns: Dor Yisrael Ashur (UCSD) Aerospace Engineer Olmo Fabian Maldonado Gomez (UTSA) Electrical Engineer

1. Week 5: WPM, Overview, Components …oh my! Mentors: Laura Balzano (UCLA) Electrical Engineer Diane Budzik (UCLA) Electrical Engineer Interns: Dor Yisrael Ashur (UCSD) Aerospace Engineer Olmo Fabian Maldonado Gomez (UTSA) Electrical Engineer

2. Project Overview • Solid Boom to transport a shuttle 50 feet across a river/lake/valley… • Whole assembly must fit in 2 backpacks and weigh below 100 lbs • The system must be assembled quickly and easily by 2 people • The system is designed to be used in rugged terrain, affordable, and fool proof.

3. Weekly Progress • Completed: • Design of the System • Tripod, Shuttle, and Beam Housing Purchased • Boom selected • Support Tower designed • Base designed and Work Ordered • Ongoing: • Boom machining (due Monday or Tuesday) • Guiding System • Anchors / Support Points

4. To Do Legend: Olmo• Dor • Combination • Undefined • Tripod • Tripod to Bottom Plate connection • Multiples • Cable connections • Base • Assembly • Shuttle • Design • Tail • Guidance System • Cranking Mechanism • Anchors • Define multiple environment and connections • Define how many minimum connections and where • Cables • Multiples or Single • Strength and Material Choice • Connection and Stringing • Stringing Assembly

5. Calendar Weekly Mentor Meeting

6. Three Boom Piece Options • Uneven I-Beam(5/8” x ½” x 1 ¼” x 1/16”) • Advantages: • Reduced weight • More room for the shuttle to straddle • Easy stringing • Disadvantage: • Thin web bends under torque • T-Beam( 1” x 1” x 1/8” ) • Advantages • Easy stringing • Disadvantages: • Harder connection of multiples • Pipe( O.D. 75” x Thickness 1/8” ) • Advantages: • Least weight • Easier multiple connection • Wire can be run through the middle in case of a multiple failing • Disadvantages • Hard to string

7. Boom Piece Connection Options Uneven I-Beam T-Beam Pipe / Cylindrical

8. Final Boom Piece Configuration Size: 24 pieces, 2 ft long, ¾” OD - We chose this pipe to accommodate for the shuttle sizes available, to cables inside, and to be able to fit in a backpack Connection: - The head of each bar will snap into the tail of the next bar

9. Tripod Manfrotto – Avenger A-128 Ultra Low Boy Stand Max Height: 29 in Max Load : 66 lb Min Height: 19 in Folded Height: 22.8 in Weight: 8.2 lb Column Tube Diameter: 35, 30 mm Price: $152 We chose this tripod for its price and because it can fit in a backpack We should have this tripod soon !!!!

10. Base (Boom Assembly Housing) Ball Bearings Each of the multiple pieces will be slid through the base when assembling the boom Pillow Block Base Cable Support Although it may be more expensive, we will buy the housing now, rather that spending time to design and build a new one Boom Tripod

11. Shuttle The shuttle is made of the same material as the base, but is smaller The aluminum housing makes customization of the shuttle and base easy

12. Shuttle Movement Designing a simple method to transport the shuttle from one end of the boom to the other Two Cranks (Green):One to move the shuttle, and one to move the node The inner wheel (brown) has a circumference of 1ft, allowing one turn of the handle to move the shuttle/node 1ft We are currently finding out how best to string this all together

13. Base Rotation • Constraints and Goals • Small enough to fit in backpack • Should not deform under its load • Angle should be measured and readable • Rotation Options: A) Hand rotated B) Gear rotated A B

14. Base Rotation cont’d • Gear Rotated • Advantages: • Precise • Hand crank mechanical advantate • Disadvantages: • More moving parts • Assembly required in fabrication • More susceptible wear and tear • Heavier • Hand Rotated • Advantages: • Easy to make • Easy to adjust • Disadvantages: • Less precise

15. Questions? TO ASK QUESTIONS! TO ASK QUESTIONS!