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Helicopter Design
2
IntroductionGeneral CharacteristicsConstraintsDeploymentConclusionsRecommendations
2Stephen Hu
Introduction
1. Investigation of the surface and lakes of Titan
2. VTOL capability3. Dependable performance in hostile
environments4. Able to last four months under
constant operation
Constraints
• Environment– Temperature– Wind– Solar Energy– Atmospheric Density
• Volume/Storage– Diameter of Heat Shield– Airship Storage
Stephen Hu 4
General Characteristics
Vehicle: Helicopter
Type: Coaxial
Number of Blades per rotor: 2 blades
Airfoil: NACA 0012
5Stephen Hu
Deployment
• Post-Airship Separation
• Generator startup
• Freefall rotor startup
• Heat Shield separation
6Stephen Hu
10
Characteristics/Performance Expected Contingency (20%)
Mass (kg) 155.4 186.5
Payload Mass (kg) 15.00 18.00
Rotor Diameter (m) 1.364 1.426
Main Blade Chord (m) 0.091 0.095
Fuselage Length (m) 2.56 2.56
Fuselage Height (m) 0.77 0.77
Total Height (m) 1 1
Total Width (m) 0.8 0.8
Max Climb Rate (m/s) 2.292 1.349
Spinup Time (s) 7.961 9.096
Max Cruise Velocity (m/s) 7.46 6.95
Optimal Cruise Velocity (m/s) 3.1 3.6
Range (km)* 188.0 175.1
Conclusions
Stephen Hu
References
1. "The Vertical Profile of Winds on Titan." www.nature.com. 8 Dec. 2005. Nature: International Weekly Journal of Science. <http://www.nature.com/nature/journal/v438/n7069/full/nature04060.html>.
2. Wright, Henry S. Design of a Long Endurance Titan VTOL Vehicle. Georgia Institute of Technology. <https://wiki.umn.edu/pub/titanedd/deployment/vtol_design_paper.pdf>.
3. Leishman, Gordon. Principles of Helicopter Aerodynamics. Cambridge UP, 2006.
12Stephen Hu