1. 1 AAE 450 Spring 2008 David Childers February 7, 2008 Interface Structures (skirts) Center of Mass Code Structures Cost Code

2. 2 AAE 450 Spring 2008 Center of Mass  DeltaV=12km/s  Total Height=19.4 Structures Propellants1: Storables2: Hybrids3: Hybrid StagesDry CM (m)Wet CM (m)Material 1,2,313.6213.09Aluminum 2,37.197.12Aluminum 31.981.29Aluminum StagesDry CM (m)Wet CM (m)Material 1,2,313.0112.97Steel 2,36.506.95Steel 31.411.18Steel Mass is Symmetric Inputs from “old” model analysis code

3. 3 AAE 450 Spring 2008 Cost  Assumptions –Estimated Titanium welding values Other welding values from Jeff Stuart –1 Rivet every 0.152m (6in) –Costs done with constant parameters Tank Material only variable changed –Propellants: Storable, Hybrid, Solid –DeltaV=12km/s Structures Future Work  Center of Mass over time  Cost of Welding and Materials  Use of Updated Model Analysis Functions Stage Material TypeTotal AllStl$1,912 AllAl$5,053 AllTi$93,540 1,2,3Stl,Al,Al$3,752 1,2,3Al,Stl,Ti$16,770 1,2,3Stl,Al,Ti$15,885 1,2,4Ti,Stl,Al$60,307

4. 4 AAE 450 Spring 2008 CoM Samples Structures Rocket Length19.4m StagesDry CM (m)Wet CM (m)Material 1,2,313.1312.99Titanium 2,36.907.06Titanium 31.701.25Titanium Rocket Length18.6m Propellants1: Storables2: Hybrids3: Solid StagesDry CM (m)Wet CM (m)Material 1,2,311.85212.023Aluminum 2,35.6496.487Steel 32.0251.243Titanium

5. 5 More CoM Samples Rocket Length18.6m StagesDry CM (m)Wet CM (m)Material 1,2,312.29712.110Aluminum 2,35.3836.479Aluminum 32.0251.243Titanium Rocket Length18.6m StagesDry CM (m)Wet CM (m)Material 1,2,312.37712.139Steel 2,35.6496.487Steel 32.0251.243Titanium AAE 450 Spring 2008 Structures

6. 6 Full Cost of Samples Stage Material TypeWeldingRivetsMaterialTotal AllStl$1,198$416$297$1,912 AllAl$2,396$416$2,241$5,053 AllTi$4,794$416$88,331$93,540 1,2,3Stl,Al,Al$2,396$416$940$3,752 1,2,3Al,Stl,Ti$4,794$416$11,560$16,770 1,2,3Stl,Al,Ti$4,794$416$10,676$15,885 1,2,4Ti,Stl,Al$2,396$416$57,495$60,307 AAE 450 Spring 2008 Structures

7. 7 Sources  Al - Youngstown Tool & Die Co.  Ti - TitaniumJoe.com  Steel - Youngstown Tool & Die Co.  carbon - RobotMarketplace.com  Jeff Stuart-Welding time values AAE 450 Spring 2008 Structures