aae 450 spring 2008 stephanie morris 3/27/08 propulsion final slides

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AAE 450 Spring 2008 Stephanie Morris 3/27/08 Propulsion Final Slides

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Page 1: AAE 450 Spring 2008 Stephanie Morris 3/27/08 Propulsion Final Slides

AAE 450 Spring 2008

Stephanie Morris3/27/08

PropulsionFinal Slides

Page 2: AAE 450 Spring 2008 Stephanie Morris 3/27/08 Propulsion Final Slides

AAE 450 Spring 2008

Propulsion

Aircraft LaunchWhite Knight was chosen as the aircraft carrier for our launch vehicle.

Maximum Altitude Maximum Payload Initial Launch Vehicle

Velocity

15000 m 3075 kg 59.72 m/s

White Knight Specifications:

Cost Breakdown:

Cost per hour ($/hr) Total Cost per launch

$4,410 $352,800

Assuming an 8 hour work day, 3 days for flight simulation and 7 days for launch preparation, the aircraft is leased for 80 hours.

Page 3: AAE 450 Spring 2008 Stephanie Morris 3/27/08 Propulsion Final Slides

AAE 450 Spring 2008

Propulsion

Risk AnalysisHybrid Propellant

  Solid Propellant Liquid Propellant Hybrid Propellant

Mass of Propellant

0.12 % 0.734 % 0.854 %

Mass flow rate 1.0 % 0.4923 % 1.4923 %

For hybrid propellants, we cannot find historical standard deviations. The two percent deviations for liquid and solid propellant are added together to calculate a hybrid propellant percent deviation.

Percent Deviations for Each Propellant Type

Page 4: AAE 450 Spring 2008 Stephanie Morris 3/27/08 Propulsion Final Slides

AAE 450 Spring 2008

ReferencesDietz, William E., Suhs, Norman E. “Pegasus User’s Guide”. Stuart E. Rogers NASA

Ames Research Center. [www.orbital.com/NewsInfo/Publications/peg-user-guide.pdf]

Heister, S., D., Davis, R., J., “Predicting Burning Time Variations in Solid Rocket Motors,” Journal of Propulsion and Power, Vol. 8, No. 3, 1992, pp. 568.

Martin Company, “The Vanguard Satellite Launching Vehicle”, Engineering Report No.11022. April 1960, pp. 26, 208.

Scaled Composites, “Tier One – Private Manned Space Program,” Scaled Composites LLC. [http://www.scaled.com/projects/tierone. Accessed 1/19/08-1/23/08.]

Williams, Bob, Sales representative of Scaled Composites. “Email Conversation,” Dates 1/22/08 through 1/31/08.

Propulsion

Page 5: AAE 450 Spring 2008 Stephanie Morris 3/27/08 Propulsion Final Slides

AAE 450 Spring 2008

Propulsion

Existing ModificationsWhite Knight L-1011-100

Stargazer F-15C/D

Existing Launch Vehicle

SpaceShipOne Pegasus ASM-135 AST

Payload (kg) 3,629 36,800 1,180

Altitude (m) 15,240 11,890 11,582

Estimated Dimensioning

8.2 m length x 8.2 m span

17.1 m length x 7.9 m span

3.66 m length x .53 m span

Assumption: • Launch vehicle will be a similar shape to pre-existing vehicle and have

the similar performance results.

Page 6: AAE 450 Spring 2008 Stephanie Morris 3/27/08 Propulsion Final Slides

AAE 450 Spring 2008

Propulsion

Cost AnalysisWhite Knight L-1011-100

Stargazer F-15C/D

Leasing Cost$26,460 per launch*

(@$4410/hr)Unavailable Unavailable

Purchase Cost Unavailable  $30,000,000 $42,520,000

*Insurance Cost (White Knight) Need $5 million coverage $125,000 for 2 months of insurance Does not include insurance needed for the launch vehicle

Page 7: AAE 450 Spring 2008 Stephanie Morris 3/27/08 Propulsion Final Slides

AAE 450 Spring 2008

Liquid Propellant – Percent Deviations

  Average ValueStandard Deviation

Percent Deviation

Mass of Propellant

16,351 kg 120 0.734

Mass Flow Rate 110.7 kg/s 0.545 0.4923

Risk Analysis