The document describes a UAS designed by a student team to deliver lightweight rescue equipment such as fishing line to victims stranded on rooftops. The team developed specifications for the device including that it must weigh less than 300g, be smaller than 12cm x 12cm, and release fishing line within 1 second of receiving a command or obstruction signal. Five alternative prototype designs are described before settling on a final "Life Hook" design using electromagnets to release a fishing line and hook. The team demonstrates the device can successfully deliver a line within specifications. They suggest future improvements such as adding a swivel mechanism and spotlight.

1. TEAM LIFE LINE

2. WHERE ARE SUCH UASS USED?

3. LIFE LINERS
Name Year Major
Dustin Ogle Senior Electrical Engineer
Caleb Fisher Junior Aerospace Engineering
Kanika Gakhar Freshman Aerospace Engineering
Abdullah Hamdi Junior Electrical Engineering
Tyler Bryant Senior Aerospace Engineering
Matthew Ray Junior Industrial Engineering

5. NEED STATEMENT

6. NEEDS AND CONSTRAINTS
Needs Constraints
Carry lightweight fish wire to victim on roof Can’t weigh more than 300 g
Needs to be balanced Can’t be larger than 12 cm X 12 cm
Fishing weight needs to be as close to body as
possible [Minimize pendulum effect]
Can’t use more than 5 V
Reliable release mechanism – on command and in
case of obstruction
Easy to load line by responder wearing gloves
Bobber/suspended weight should be able to float

7. ENGINEERING SPECIFICATIONS
Requirements Metrics Numerical Targets
Lightweight Minimum Weight of clasp, bracket, camera
and magnets
<300 g
Small Minimum size (length x width) < 12 cm x 12 cm
Energy efficient Minimum voltage requirements <5 V
Needs to be balanced Optimum position of Center of Mass Center of bracket

8. ENGINEERING SPECIFICATIONS CONTD.
Requirements Metrics Numerical Targets
Fishing weight needs to be as close to body
as possible [Minimize pendulum effect]
Minimum distance between weight and body <5 cm
Reliable release mechanism – on command
and in case of obstruction
Minimum time to release fish line when
required
<1 s
Easy to load line by responder wearing
gloves
Number of steps to setup apparatus < 3
Bobber/suspended weight should be able
to float
Smaller Density of suspended weight <1 gcm^3

9. FUNCTIONAL BLOCK DIAGRAM
•Human input – setup
•Electrical Signal
•Fish Line with weight
•Tugging force (obstruction)
•Power supply for camera
Inputs
•Carry Fish Line with weight
•Release fish line on receiving command
•Release fish line on receiving tugging force
•Maintain balance of UAS
•Video record ground landscape
•Ensure safe movement of UAS
Functions • Fish Line dropped at required
location
• Live-feed video recording
• Saved Lives!
Outputs

10. ALTERNATIVE PROTOTYPE 1

11. ALTERNATIVE PROTOTYPE 2

12. ALTERNATIVE PROTOTYPE 3

13. ALTERNATIVE PROTOTYPE 4

14. ALTERNATIVE PROTOTYPE 5

15. FINAL CONCEPTUAL DESIGN
– LIFE HOOK

16. DEMONSTRATION

17. CONCEPTUAL PROOF:
ELECTROMAGNETISM

18. ELECTRIC CIRCUIT

19. MATHEMATICAL ANALYSIS
tan−1 𝑥 =
50
80
= 31.8° ≈ 30°
tan−1
𝑥 =
4.5
7.5
= 30.8° ≈ 30°

20. GLIMPSE OF OUR CONSTRUCTION
AND TESTING PHASE

21. RESULTS

22. TEST RUN OUTCOMES
Negative Positive

23. FUTURE IMPROVISATIONS
Swivel Mechanism
Variability of strength of magnets for heavier loads
Spotlight to highlight target area in poor lighting
Spring Mechanism to attach/ detach bracket
Cylindrical Hook for seamless release
Hinge Mechanism to allow hook to fall open to a vertical position

24. OTHER IMPLICATIONS
• Replace bobber with required survival supplies
• Increase permanent magnet’s magnetic strength and electromagnet’s amperage /no. of turns
Directly deliver survival supplies
• Fly UAV over a horizon with a line hanging; if UAV returns with no line – obstructions are
detected
Detection of clearance of horizon
Provide rescue rope to military trainers stranded at heights

27. ACKNOWLEDGEMENTS
• Prof. Robin R Murphy
• Prof. Rodney Boehm
• Disaster City Employees
• TEEX Employees
• Aggies Invent Organizers and Technicians