1. ¡¡ Ten Cuidado!! 16.00 LTA CDR

2. Team Members Josh Maciejewski – design, construction, Solidworks Josh Maciejewski – design, construction, Solidworks Matt Zachar – design, construction Matt Zachar – design, construction Leslie Brown – construction, presentations Leslie Brown – construction, presentations Andrea Staid – construction, presentations Andrea Staid – construction, presentations

3. Objective Present final design & scale drawings Present final design & scale drawings Discuss design alterations Discuss design alterations Aerodynamic analysis of design Aerodynamic analysis of design Discuss control systems Discuss control systems Project timeline Project timeline

4. Final Design

5. Structure

6. Scale Drawings Side View Top View *all measurements are in meters

7. Scale Drawings Front View *all measurements are in meters

8. Vehicle Analysis 3 balloons 3 balloons 2 small motors 2 small motors 2 small props 2 small props 1 large motor 1 large motor 1 large prop 1 large prop 1 battery pack 1 battery pack Receiver Receiver 1 receiver battery 1 receiver battery 2 servos 2 servos Balsa wood, etc. Balsa wood, etc. TOTAL WEIGHT TOTAL WEIGHT 0.21 kg 0.1794 kg 0.0106 kg 0.42 kg 0.0159 kg 0.148 kg 0.027 kg 0.094 kg 0.086 kg ~0.03 kg ~9.9 N

9. Vehicle Analysis V = W/((ρ air – ρ he )*g) V=0.96 m 3 L=W=9.9N T=2(0.8)+1(0.14 )=1.74N D=1/2*ρ air* v 2 * C D =1.19N v=T/(1/2 C D S) 1/2 v max =1.4 m/s

10. Vehicle Analysis Ideal flight time=d/v=87/1.4=62s* *Actual flight time will be much longer Battery life~10 min

11. Control Systems 2 rear rudders controlled by servo 2 rear rudders controlled by servo 1 rear elevator controlled by servo 1 rear elevator controlled by servo 3 variable speed motors controlled simultaneously 3 variable speed motors controlled simultaneously (2 shown in picture) (2 shown in picture)

12. Changes Made Thinner frame Thinner frame Simultaneously controlled motors Simultaneously controlled motors Third balloon added Third balloon added Netting for ballons Netting for ballons

13. Timeline for Remainder of Project 4/18-4/24 Work on CDR and design 4/18-4/24 Work on CDR and design 4/25-5/1 Finish and test vehicle 4/25-5/1 Finish and test vehicle 5/2-trials day Test and refine vehicle 5/2-trials day Test and refine vehicle trials-race day Test and refine trials-race day Test and refine Race day Win Race day Win

14. Conclusion Our LTA vehicle is awesome, and we are very proud of it. We can’t wait to see you on the course. Our LTA vehicle is awesome, and we are very proud of it. We can’t wait to see you on the course. ¡¡Ten Cuidado!!