1. AAE450 Spring 2009 Caitlyn McKay Structures and Thermal 10 kg Integrator Locomotion Phase – Rover, Deployment Alternative Design – Accordion 1

2. AAE450 Spring 2009 2 Caitlyn McKay Structures and Thermal Deployment Copper Lining Explosive Charge Linear Shaped Charge Charge Mass: 0.580 kg Foam Mass: 0.040 kg Total Mass: 0.620 kg Thermally insulated box Toy ball FoamCharge Side view of Toy Ball Picture not to scale

3. AAE450 Spring 2009 Dust Repellant - Magnet Pull COM Equipment0 kg Lunar Dust0.326 kg Mass: 0.00024 kg Cost: $15.00 3 Caitlyn McKay Structures and Thermal

4. AAE450 Spring 2009 Dust Moon dust made of: –Rock fragments –Mineral fragments –Glassy particles Contain “natural iron” Virtually all <10 m can be repelled by a hand-held magnet. 4 Caitlyn McKay Structures and Thermal Flux Density COM Equipment14.70 microTesla Lunar Dust1602.17 microTesla

5. AAE450 Spring 2009 Sizing the Rover Wheel Wheel Radius (m) Rock Size (m) Optimum Base (m) Success (%) 1.0160.384 2.874 99.3 0.6770.256 1.916 98.4 0.3390.128 0.958 96.8 0.1690.064 0.479 94.0 0.0850.032 0.239 90.2 0.0420.016 0.120 90.2 0.0210.008 0.060 76.9 5 Caitlyn McKay Structures and Thermal

6. AAE450 Spring 2009 Sizing the Rover Wheel Optimum Base Size Maximum Step Size Rocks are taken as a “step” that needs to be climbed. R = radius, H = height, B = base 6 Caitlyn McKay Structures and Thermal

7. AAE450 Spring 2009 Rover Update (Kamikaze) Solar Panels kg Batteries0.422kg Power (extra)1.92kg Communicatio ns1.51kg Drive System0.298kg Structure (frame)0.40kg Space Blankets0.58kg Wheels0.58kg Cooling System kg System Mass5.7074kg Ballast Mass10kg Total15.7074kg Length0.23m Width0.21m Height0.21m * Life of 13 minutes. 7 Caitlyn McKay Structures and Thermal

8. AAE450 Spring 2009 Accordion Further analysis was done on the crushable material to increase impact time. I recommended not using a crushable material because: –Engine(s) would get in way of material for small free fall distance. –Added weight/length too great for free fall from far distance, didn’t outweigh the propellant to move the added mass. 8 Caitlyn McKay Structures and Thermal

9. AAE450 Spring 2009 Accordion  Assumption: –Using honeycomb material, would completely crush. Only 2 of the 5 honeycomb types would crush, Al- alloy 5056 3/8-5056-.0007p and ¼-5056-.0007p. 9 Caitlyn McKay Structures and Thermal

10. AAE450 Spring 2009 Accordion 10 Caitlyn McKay Structures and Thermal

11. AAE450 Spring 2009 References Calio, Anthony J., John W. Harris, John H. Langford, R. Mercer, Jamie L. Moon, Scott H. Simpkinson, William K. Stephenson, Jeffrey L. Warner, and Julian M. West, eds. Apollo 12 Preliminary Science Report. Rep. no. SP-235. Washinton, D.C.: NASA, 1970. NASA. 26 Feb. 2009. "Evonik Foams - SOLIMIDE® Polyimide Acoustical and Thermal Aircraft Insulation Foam -." Aerospace Technology. 01 Mar. 2009. Kane, Molly. "Explosive Bolts." E-mail to the author. 4 Mar. 2009. "Lunar/page1." Web.utk.edu. 02 Mar. 2009. 11 Caitlyn McKay Structures and Thermal

12. AAE450 Spring 2009 "NASA’s Dirty Secret: Moon Dust." Science Daily: News & Articles in Science, Health, Environment & Technology. 02 Mar. 2009. Novotney, Dave, and Meryl Mallery. "Historical Development of Linear Shaped Charge." 43rd AIAA/ASME/SAE/ASEE. Proc. of Joint Propulsion Conference and Exhibit, Cincinnati, OH. American Institute of Aeronautics and Astronautics, 2007. Pletta, Bryan J. "The Robotic All-Terrain Lunar Exploration Rover (RATLER): Increased mobility through simplicity." NASA, Langley Research Center, Selected Topics in Robotics for Space Exploration (1993): 247-67. Strong Neodymium Magnets Rare Earth K&J Magnetics. 02 Mar. 2009. Taylor, Lawrence A. "The Lunar Dust Problem: A Possible Remedy." Space Resources Roundtable II. 2000. 12 Caitlyn McKay Structures and Thermal

13. AAE450 Spring 2009 Wijker, Jacob Job. Spacecraft Structures. New York: Springer, 2008. Purdue University, West Lafayette, IN. 16 Feb. 2009. 13 Caitlyn McKay Structures and Thermal