AAE450 Senior Spacecraft Design Brandon Anderson Week 3: February 1st, 2007 Structures Group Taxi Capsule, Electric Propulsion System.

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AAE450 Senior Spacecraft Design Brandon Anderson Week 3: February 1st, 2007 Structures Group Taxi Capsule, Electric Propulsion System

AAE450 Senior Spacecraft Design Electric Propulsion System Truss –Supports EP system and various vehicles being transported –4 segments –Standard 1.5x Safety Factor –2.5g Max Load –Cube, width = 2m –Al 7075-T6 –Payloads based on Dan Maguire’s calculations SegmentMass (mt) Volume (m^3) Length (m)

AAE450 Senior Spacecraft Design EP Continued How to lower this size – Staged Mars Launch Vehicle will reduce payload –2-axis Trusses –Material Choice AlLi Alloy shows advantage in other structures

AAE450 Senior Spacecraft Design Backup Slides Total Mass (mt)Structural Mass (mt)Propellant Mass (mt) Arrive Earth (aE) Depart Mars 1 (dM) Depart Mars 2 (dM) Arrive Mars 1 (aM) Arrive Mars 2 (aM) Depart Earth 1 (dE) Depart Eatth 2 (dE) Mars Launch 1 (ML) Mars Launch 2 (ML) Mars Taxi 1 (MT) Mars Taxi 2 (MT) Earth Taxi (ET)

AAE450 Senior Spacecraft Design Backup Slides VehicleHeight Taxi Capsule (TC)-- Mars Taxi 1 (MT) Mars Taxi 2 (MT) 16.5 m 15.7 m Earth Taxi (ET)5.5 m Arrive Earth (aE)16.5 m Depart Mars 1 (dM) Depart Mars 2 (dM) 24 m 3.5 m Arrive Mars 1 (aM) Arrive Mars 2 (aM) 27.5 m 13 m Depart Earth 1 (dE) Depart Earth 2 (dE) 56 m 36 m Mars Launch 1 (ML) Mars Launch 2 (ML) 160 m 175 m From Dan Maguire Week 2 Presentation

AAE450 Senior Spacecraft Design Equations Buckling Yield

AAE450 Senior Spacecraft Design Dimensions SectionHeight (m)Width (m)Bar Radius (m) Each Truss Contains 4 Sections, 1-4 are for near truss, 5-8 from far truss. Designed assuming payloads will be max 8.7m diameter. Allows for minimum 1.3m between payloads. Cross bars to connect to vertical sections are.09m radius.

AAE450 Senior Spacecraft Design Mass and Volume SectionMass (mt)Volume (m^3) This is for each side.