irnclam – international cislunar ascension module brian anderson aste527 2010/11/23
TRANSCRIPT
IRNCLAM – InteRNational CisLunar Ascension Module
Brian AndersonASTE5272010/11/23
Background
Requirement: commercial development of ISS
Solution: send tourists to Moon on Earth-Moon transport
ISS to exist for ~10 more yearsuse existing tech for cislunar transport
Concept
Launch tourists & astronauts to ISS Depart ISS in Cislunar Transfer
Vehicle Insert into Lunar orbit, stay few days Return to ISS Return to Earth
Vehicle Design
Cislunar Transfer Vehicle 4x Centaur TLI stages Sundancer “habitation module” Radiation hardened for SPEs
Habitation Module – Bigelow Sundancer
Pros Much MORE VOLUME for SIMILAR MASS as other
space vehicles Designed with comfort in mind Existing ballistic protection + radiation shielding ECLSS as well as hygiene facilities Good exterior viewing possibilities
Cons: Large surface areamore mass for addt’l
radiation hardening
Additional Radiation Hardening 5 g/cm^2 to protect against worst
case SPE Al, LiOH, Polyethylene or H20 (last two
best) Sundancer Area~=2.35x10^6 cm^2 Rad shield mass~=11700kg Assuming Sundancer already has
shielding equivalent to 2 g/cm^2 Rad shield mass~=7000kg
TLI – Centaur Upper Stage
Pros Repeatedly flight tested design High Isp
Cons Propellant mass could be higher for such
a mission
Stack Design
Requried V = 2x(3700 m/s)=7400 m/s
Requires 4xCentaur stages!! Payload Mass = 15’600 kg
Sundancer + Rad shield Total Propellant Mass = 83’320 kg Total Mass = 107.9 Metric Tons Achieved V=7429 m/s
IRNCLAM
Centaur Centaur CentaurCentaur Sundancer
Merits & Limitations Merits
Uses existing designs Designed with passenger experience in
mind Designed for space-only use, no mass for
heat shield Limitations
LARGE TLI stack due to Earth Orbit Injection and ISS docking
~14 days with no gravity
Future Studies
Use water supply for radiation shielding?
Direct Earth Reentry to reduce stack size?
J2-X better option for TLI?
References Wertz, James R. Space Mission Analysis and
Design. Dordrecht [u.a.: Kluwer Academic Publ., 2008. Print.
Bigelow Aerospace http://www.bigelowaerospace.com/sundancer.php
Bernabeu, J., and I. Casanova. "Geant4-based Radiation Hazard Assessment for Human Exploration Missions." Advances in Space Research 40.9 (2007): 1368-380. Print.