Multi-purpose Space Tug Vehicle

The reusable Multi-Purpose Space Tug will satisfy earth orbit transfer functions for necessary space infrastructure development and provide a technology demonstrator to support flight hardware qualification for propulsion components for future on-orbit, moon and planetary operations. Previous studies by the SPST has provided insight to aid in the Space Tug design employing choices consistent with expected architecture requirements and goals (1) .There are many alternatives and choices to produce a system that best meets the performance requirements, but at the same time provides the best opportunity of reaching all the required objectives. The purpose of the Space Tug orbital maneuvering vehicle is to provide a vehicle with long term in-space operation with the capability to interact with necessary architecture elements providing a test bed to demonstrate long term operation and qualification of propulsion hardware for future in-space propulsion needs and be a workhorse element in the infra-structure development. The Space Tug will perform its functions and also provide a test bed to evaluate needed propulsion related technology demonstration and qualification for long term operations for future missions. Propellant transfer with repeated on orbit refueling will be one of the key requirements to demonstrate. I. Nomenclature ACS Attitude Control System EMA Electro Mechanical Actuator ETO Earth-to-Orbit DDTE chairman, Space Propulsion Synergy Team, and AIAA Associate Fellow. Aerospace Technologist, NASA Kennedy Space Center, retired, and AIAA Senior Member. Private Consultant, Liquid Propulsion Technical Committee Member and AIAA Associate Fellow.