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