1. Jerald A. Balta 3/6/2008 Propulsion Team/CAD Cost Modifiers
AAE 450 Spring 2008

2. Cost Modifiers Balloon Cost Modifiers Cost Modifier
Balloon – Price quote from Aerostar International
Helium – Priced at $4.87 per cubic meter
Gondola
Cost Modifier
Tubing – Based on given pricing and scaled per stage
Handling – Personnel required for handling of fuels, toxic materials, etc
Ground Support – Based on estimation of salaries of necessary personnel
AAE 450 Spring 2008
Group Name (i.e.Trajectory Optimization)

3. Table of Costs Future Work Finish CAD Modeling
Report Write Up on Balloon and Cost Modifiers
AAE 450 Spring 2008
Group Name (i.e.Trajectory Optimization)

4. Credited to Sarah Shoemaker
Gondola (Backup)
Mass
288.4 kg of Aluminum
Cost
$1205.3
Provided by Sarah Shoemaker and Structures Group
Credited to Sarah Shoemaker
AAE 450 Spring 2008
Group Name (i.e.Trajectory Optimization)

5. Structures Gondola Code (Backup)
function stress = gondola_strength(GLOW, area, gond_weight)
g = ;
GLOW = ;
area = .787;
gond_weight = ;
force = (GLOW + gond_weight)*g;
stress = force/area;
Credit to Structures Group

6. Structures Gondola Cost Code (Backup)
function cost = gond_cost(gond_weight, length)
length = 2*.04*4;
gond_weight = ;
time_weld = 1/.6*length;
num_rivet = length/.1524;
cost_rivet = .73;
labor_cost = .049;
cost_labor = 52;
rivet_cost = cost_rivet*num_rivet;
labor_hr = labor_cost*num_rivet;
Labor_cost = cost_labor*labor_hr;
mat_cost = 13.23*84.533;
weld_cost = 150*time_weld;
riv_cost = rivet_cost + Labor_cost;
cost = mat_cost + weld_cost + riv_cost;
Credit to Structures Group

7. Cost trends from Aerostar (Backup)
AAE 450 Spring 2008
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8. References
Defense Energy Support Center, “MISSILE FUELS STANDARD PRICES EFFECTIVE 1 OCT 2007,” Aerospace Energy Reference, November 2007
Smith, Mike, Phone Conversation, Aerostar International, February 15, 2008