1. David Childers March 6, 2008 Structures Cost Center of Mass
AAE 450 Spring 2008

2. Structure Costs DeltaV % 145% 115% 125% Payload 200g 1kg 5kg Stage 1
5-10% Discount when multiple tank purchased
Cost reduction with lower tolerances
DeltaV %
145%
115%
125%
Payload
200g
1kg
5kg
Stage 1
$1,394,800
$1,205,400
$1,843,800
Stage 2
$790,900
$643,200
$955,400
Stage 3
$131,800
$158,900
$136,000
Total
$2,317,500
$2,007,500
$2,935,200
AAE 450 Spring 2008
Structures

3. Center of Mass Assumptions Masses are symmetric around body axis
Notes:
Cm of third stage moves down when empty
Result of Engine Mass:
Mengine > Mpayload
Assumptions
Masses are symmetric around body axis
200g
1kg
5kg
Stage: Full/Empty
145% (m)
115% (m)
125% (m)
1: Full
5.284
3.914
7.433
1: Empty
3.545
2.647
5.334
2: Full
2.506
1.840
2.419
2: Empty
2.011
1.421
1.986
3: Full
.631
0.641
0.499
3: Empty
0..714
0.750
0.693
AAE 450 Spring 2008
Structures

4. Structure Costs Pay=200g Stage DeltaV % 1 2 3 Total 125 $999,490
Values change due to dimension distribution between stages and some cases may have incorrect values from sizing runs.
Pay=200g
Stage
DeltaV % 1 2 3
Total
125
$999,490
$565,100
$137,210
$1,701,800
130
$1,251,100
$592,500
$99,800
$1,943,400
135
$1,265,600
$570,700
$77,700
$1,914,000
140
$1,333,700
$635,800
$85,400
$2,054,900
150
$1,549,800
$672,600
$45,400
$2,267,800
Average
$1,311,420
$613,380
$89,060
$2,013,860
AAE 450 Spring 2008
Structures

5. Structure Costs Pay=1kg Stage DeltaV % 1 2 3 Total 115 $1,205,400
Values change due to dimension distribution between stages and some cases may have incorrect values from sizing runs.
Pay=1kg
Stage
DeltaV % 1 2 3
Total
115
$1,205,400
$643,200
$158,900
$2,007,500
120
$1,205,000
$273,300
$169,800
$1,648,100
125
$1,407,700
$668,600
$123,000
$2,199,300
130
$1,451,300
$478,700
$175,500
$2,105,500
135
$1,401,900
$409,600
$241,600
$2,053,100
140
$1,529,200
$367,800
$185,000
$2,082,000
150
$1,800,100
$722,400
$137,300
$2,659,800
Average
$1,518,040
$529,420
$172,480
$2,219,940
AAE 450 Spring 2008
Structures

6. Structure Costs Pay=5kg Stage DeltaV % 1 2 3 Total 125 $1,907,000
Values change due to dimension distribution between stages and some cases may have incorrect values from sizing runs.
Pay=5kg
Stage
DeltaV % 1 2 3
Total
125
$1,907,000
$822,100
$84,500
$2,813,600
130
$1,768,200
$712,000
$152,100
$2,632,300
135
$1,823,200
$730,000
$154,500
$2,707,700
Average
$1,787,433
$733,667
$122,333
$2,643,433
AAE 450 Spring 2008
Structures

7. Center of Mass 200g Payload Stage: Full/Empty 1: Full 3.0228 2.9747
Compiled by Everyone who resized rockets.
200g Payload
Stage: Full/Empty
100%
(m)
110%
120%
130%
140%
150%
1: Full
3.0228
2.9747
3.8033
4.1071
4.9419
4.8882
1: Empty
2.036
2.04
2.5943
2.7685
3.3139
3.2144
2: Full
1.126
1.4166
1.8535
1.8491
1.9873
1.7303
2: Empty
0.9155
1.1121
1.436
1.4495
1.5948
1.3094
3: Full
0.5299
0.6272
0.6397
0.598
0.5468
0.6775
3: Empty
0.5774
0.708
0.7247
0.6688
0.6003
0.9015
AAE 450 Spring 2008
Structures

8. Center of Mass 1kg Payload Delta V % Increase Stage: Full/Empty 100%
Compiled by Everyone who resized rockets.
1kg Payload
Delta V % Increase
Stage: Full/Empty
100%
(m)
110% (m)
120% (m)
130% (m)
140% (m)
150% (m)
1: Full
4.268
3.859
2.854
4.277
3.176
7.440
1: Empty
2.996
2.656
1.910
2.837
2.121
5.112
2: Full
0.990
1.881
1.178
1.541
1.339
2.295
2: Empty
0.838
1.519
0.961
1.193
1.061
1.805
3: Full
0.608
0.498
0.664
0.660
0.698
0.647
3: Empty
0.705
0.564
0.758
0.774
0.824
AAE 450 Spring 2008
Structures

9. Center of Mass Delta V % Increase Stage: Full/Empty 100% (m) 110%
Compiled by Everyone who resized rockets.
Delta V % Increase
Stage: Full/Empty
100%
(m)
110%
120% (m)
1: Full
4.888
4.672
6.940
1: Empty
3.214
3.184
4.569
2: Full
1.730
1.260
2.736
2: Empty
1.309
1.057
2.226
3: Full
0.678
0.653
0.590
5kg Payload
AAE 450 Spring 2008
Structures

10. References Paul Morissette, Gilchrist Metalfab
Walter Tam of ATK Space Systems, Inc. (PSI Operations),
Mike Murphy, Spincraft
Mark Sutton, G.E.
AAE 450 Spring 2008
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Structures