2. Silicone, Cork, Silica Glass Fibers
Previous Missions
Mission
Entry Speed (km/s)
Max Temp (C)
Material
Galileo
47.38
15500
Carbon-Phenolic
Apollo
11.17
2760
Phenolic Epoxy Resin
Pathfinder
4.47
1650
Silicone, Cork, Silica Glass Fibers
AGA
11.54
2250
Location Dependant
4/08/2003

3. Material Properties
4/08/2003

4. Design Factors Heating Duration  10-20 minutes Large Area  4x8m
Heat Soak
Increases Thickness of Ablator
Large Area  4x8m
Large Volume of TPS
Weight Limits
4/08/2003

5. Design Algorithm
Caclulate heating history for several points of aeroshell
Choose materials for each point
Size depth of TPS for each point
Calculate TPS Volume  Mass
Hand Mass over to Structures
4/08/2003