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1<#>AAE 450 Spring 2008
David ChildersFebruary 7, 2008
Interface Structures (skirts)Center of Mass CodeStructures Cost Code
2<#>AAE 450 Spring 2008
Center of Mass DeltaV=12km/s Total
Height=19.4
Structures
Propellant s1: Storable s2: Hybrid s3: Hybrid
Stages Dry CM (m) Wet CM (m) Material
1,2,3 13.62 13.09 Aluminum
2,3 7.19 7.12 Aluminum
3 1.98 1.29 Aluminum
Stages Dry CM (m) Wet CM (m) Material
1,2,3 13.01 12.97 Steel
2,3 6.50 6.95 Steel
3 1.41 1.18 Steel
•Mass is Symmetric
•Inputs from “old” model analysis code
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
StageMaterial
Type Total
All Stl $1,912
All Al $5,053
All Ti $93,540
1,2,3 Stl,Al,Al $3,752
1,2,3 Al,Stl,Ti $16,770
1,2,3 Stl,Al,Ti $15,885
1,2,4 Ti,Stl,Al $60,307
4<#>AAE 450 Spring 2008
CoM Samples
Structures
Rocket Length 19.4m
Stages Dry CM (m) Wet CM (m) Material
1,2,3 13.13 12.99 Titanium
2,3 6.90 7.06 Titanium
3 1.70 1.25 Titanium
Rocket Length 18.6m
Propellants1:
Storable s2: Hybrid s3: Solid
Stages Dry CM (m) Wet CM (m) Material
1,2,3 11.852 12.023 Aluminum
2,3 5.649 6.487 Steel
3 2.025 1.243 Titanium
5<#>
More CoM SamplesRocket Length 18.6m
Stages Dry CM (m) Wet CM (m) Material
1,2,3 12.297 12.110 Aluminum
2,3 5.383 6.479 Aluminum
3 2.025 1.243 Titanium
Rocket Length 18.6m
Stages Dry CM (m) Wet CM (m) Material
1,2,3 12.377 12.139 Steel
2,3 5.649 6.487 Steel
3 2.025 1.243 Titanium
AAE 450 Spring 2008
Structures
6<#>
Full Cost of SamplesStage
Material Type Welding Rivets Material Total
All Stl $1,198 $416 $297 $1,912
All Al $2,396 $416 $2,241 $5,053
All Ti $4,794 $416 $88,331 $93,540
1,2,3 Stl,Al,Al $2,396 $416 $940 $3,752
1,2,3 Al,Stl,Ti $4,794 $416 $11,560 $16,770
1,2,3 Stl,Al,Ti $4,794 $416 $10,676 $15,885
1,2,4 Ti,Stl,Al $2,396 $416 $57,495 $60,307
AAE 450 Spring 2008
Structures
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
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