1. AAE450 Senior Spacecraft Design Dan Maguire Week 2: January 25 th, 2007 Structures Group Group Leader, Ares 1, Earth Taxi, Mars Taxi, Depart Mars, Arrive Mars, Depart Earth, Arrive Earth vehicles Chemical Propulsion Vehicles: Mass and Sizing

2. AAE450 Senior Spacecraft Design Mass of Chemical Rocket Vehicles Taxi Vehicles –Site of launch and landing –MT2 contains Sample Return (SR) –Taxi vehicles are based on TC size Departure and Arrival Vehicles –Mass of vehicles estimated by Structures team last week –Delta V numbers estimated by D&C team last week –Initial calculation of TC –MT and ET estimation –aE, dM, aM, dE, ML followed VehicleMass Propellant Volume Taxi Capsule (TC)4.7 mt13 m 3 Mars Taxi 1 (MT) Mars Taxi 2 (MT) 380 mt 340 mt 1050 m 3 1000 m 3 Earth Taxi (ET)125 mt350 m 3 Arrive Earth (aE)360 mt1000 m 3 Depart Mars 1 (dM) Depart Mars 2 (dM) 530 mt 70 mt 1500 m 3 200 m 3 Arrive Mars 1 (aM) Arrive Mars 2 (aM) 630 mt 280 mt 1750 m 3 800 m 3 Depart Earth 1 (dE) Depart Earth 2 (dE) 1250 mt 800 mt 3500 m 3 2250 m 3 Mars Launch 1 (ML) Mars Launch 2 (ML) 3500 mt 4000 mt 10000 m 3 11100 m 3

3. AAE450 Senior Spacecraft Design Sizing of Chemical Rocket Vehicles Limited to Ares rockets –Size Diameter – 9 m Height – 28.8 m –Weight Payload Size – 130 mt Number of Ares rockets is constrained to m pl restriction VehicleHeightAres V Taxi Capsule (TC)-- Mars Taxi 1 (MT) Mars Taxi 2 (MT) 16.5 m 15.7 m 3333 Earth Taxi (ET)5.5 m1 Arrive Earth (aE)16.5 m3 Depart Mars 1 (dM) Depart Mars 2 (dM) 24 m 3.5 m 4141 Arrive Mars 1 (aM) Arrive Mars 2 (aM) 27.5 m 13 m 5353 Depart Earth 1 (dE) Depart Earth 2 (dE) 56 m 36 m 10 7 Mars Launch 1 (ML) Mars Launch 2 (ML) 160 m 175 m 28 32

4. AAE450 Senior Spacecraft Design Factors Effecting Mass/Sizing – Backup Slide Delta V approximation –Landing/Take off spot on Mars –Overestimate Vehicle Mass –Rough Estimate in first week –Overestimate Capacity of Ares 1 & 5 Rockets Infrastructure is there for calculation

5. AAE450 Senior Spacecraft Design Vehicle Mass – Backup Slide Excel Sheet based on Kirk Akaydin attachment

6. AAE450 Senior Spacecraft Design Chemical Propulsion Delta V – Backup Slide Excel Sheet based on Chris Bush Matlab program Approximated by propulsion group Vehicle distribution based on Dr. Landau thesis

7. AAE450 Senior Spacecraft Design Volume of a Cylinder

8. AAE450 Senior Spacecraft Design Rocket Equation – Backup Slide

9. AAE450 Senior Spacecraft Design Resourses Dr. Damon F. Landau. “Strategies for the Substained Human Exploration of Mars” Thesis Submitted to the Faculty of Purdue University, Dec. 2006.