1. 1 Air Jellyfish Design Team #1 Jacob Chard Ben Sponagle Chris Theriault Shane Yates Supervisor: Dr. Marek Kujath

2. 2 Outline Background Design Requirements Design Analysis Future Work Conclusion

3. 3 Inspiration: Festo® AirJelly Remote-controlled airborne jellyfish Central electric drive moves tentacles Horizontal motion controlled by centre-of- mass-shifting pendulum Source: www.festo.com Background Design Future Work Conclusion Analysis Design Requirements

4. 4 Objectives Mimic appearance of a jellyfish Achieve flight Create effective advertising medium Background Design Future Work Conclusion Analysis Design Requirements

5. 5 1.Fit in a cube with 3m sides 2.Generate vertical propulsion with flapping appendages 3.Rise to a height of 8m 4.Operate for a period of 30 minutes 5.Be maneuverable in three dimensions Background Design Future Work Conclusion Analysis Design Requirements

6. 6 6.Be operational at a distance of 20m away from operator 7.Have an attached advertisement that is interchangeable 8.Function in an indoor and outdoor environment 9.Be aesthetically pleasing as it is to be used as an advertising medium to draw attention Background Design Future Work Conclusion Analysis Design Requirements

7. 7 Component Systems Six systems were considered 1.Balloon/Frame 2.Power Supply 3.Power Transmission 4.Leg Drive 5.Legs 6.Directional Control Background Design Future Work Conclusion Analysis Design Requirements

8. 8 Selected Design Background Design Future Work Conclusion Analysis Design Requirements

9. 9 Selected Design Single helium-filled balloon with frame for component attachment Background Design Future Work Conclusion Analysis Design Requirements

10. 10 Selected Design DC Motor drives paddles via scotch yoke and cables Background Design Future Work Conclusion Analysis Design Requirements

11. 11 Selected Design Rigid legs with folding paddles provide vertical thrust Background Design Future Work Conclusion Analysis Design Requirements

12. 12 Selected Design Dual fans provide movement in horizontal plane Radio control system Batteries supply electrical power Background Design Future Work Conclusion Analysis Design Requirements

13. 13 Budget Background Design Future Work Conclusion Analysis Design Requirements SystemCost Balloon$350 Frame/ Leg Drive$670 Legs$130 Power Supply$220 Power Transmission $360 Steering/Control$270 Total:$2000

14. 14 Torque Requirement Analysis Torque requirement of motor dependent on several factors –Mass of legs –Surface area of paddles –Length of stroke –Angular velocity of legs Background Design Future Work Conclusion Analysis Design Requirements

15. 15 Torque Requirement Analysis Background Design Future Work Conclusion Analysis Design Requirements On leg upswing, assuming 3000 rpm motor:

16. 16 Preliminary Testing Modeling behaviour of device is extremely difficult –Flexible legs –Drag forces A counterweighted testing rig was constructed to test leg prototypes Background Design Future Work Conclusion Analysis Design Requirements

17. 17 Testing Rig Background Design Future Work Conclusion Analysis Design Requirements

18. 18 Results of Testing Rejected flexible legs in favour of rigid legs with hinged paddles Opted for double pulley mechanism rather than pulley-spring mechanism Verified that maximum torque load occurs on leg upstroke Background Design Future Work Conclusion Analysis Design Requirements

19. 19 Future Work Additional preliminary testing to confirm motor and battery specifications Complete strength analysis of frame and legs Parts and materials acquisition Design tether for outdoor use Assembly Testing and refinement Background Design Future Work Conclusion Analysis Design Requirements

20. 20 Conclusion Strengths –Unconventional design will provide an effective advertising medium –Preliminary testing has provided a wealth of information Challenges –Minimizing weight –Gaining sufficient thrust from legs –Completing project within budget Background Design Future Work Conclusion Analysis Design Requirements

21. 21 Acknowledgements Team 1 would like to recognize the following organizations for providing the necessary funds: –Shell Canada Limited –Department of Mechanical Engineering, Dalhousie University Background Design Future Work Conclusion Analysis Design Requirements

22. 22 Acknowledgements The owners of the images used in the presentation template –Sanjay Arachya, picture in top-left corner (image has been resized) –Markus Nolf, background picture (image has been flipped, resized, and lightened) –Both photographs were taken in the Monterey Bay Aquarium, CA, USA Background Design Future Work Conclusion Analysis Design Requirements

23. 23 Questions? Background Design Future Work Conclusion Analysis Design Requirements Source: Dr. John H. Costello, Providence College, RI