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Technical Paper

Requirements for Space Propulsion Systems

1968-02-01
680360
This paper explores some of the many considerations which enter into the choice of a specific spacecraft propulsion system for a particular application. The environment and its influence on propulsion requirements are discussed in general terms, characteristics of several propellant combinations are presented and an example of a typical ambitious mission is used. ...A general conclusion is that the state of the art of spacecraft propulsion technology must advance on a broad front in the time period prior to project definition in order to provide the technological options which allow significant optimization of the complete project propulsion system. ...A general conclusion is that the state of the art of spacecraft propulsion technology must advance on a broad front in the time period prior to project definition in order to provide the technological options which allow significant optimization of the complete project propulsion system.
Technical Paper

Mars Lander Propulsion

1968-02-01
680732
Mars landing vehicle descent propulsion is discussed in the light of the constraints of the mission, the environment, and the interfacing functions. ...The presence of a largely undefined, tenuous atmosphere is shown to produce a great variability of initial and boundary conditions for the propulsion phase of descent. The mission provides numerous subtle constraints of formidable importance to the propulsion implementation. ...The mission provides numerous subtle constraints of formidable importance to the propulsion implementation. The current requirement for prelaunch, in-situ, thermal sterilization is paramount among these.
Technical Paper

ELECTRIC PROPULSION SYSTEMS

1960-01-01
600043
THE NUCLEAR turboelectric ion propulsion system operates as follows: 1. A nuclear reactor supplies thermal energy to a vapor boiler. 2. ...Electric propulsion systems can be used in a wide variety of space missions, including satellite sustainers, lunar cargo transport, and interplanetary missions.*
Technical Paper

Propulsion System Optimization for the ATT

1971-02-01
710760
This paper reviews a recent internal study by Pratt & Whitney to define the optimum propulsion system characteristics for a commercial transport designed to fly at Mach 0.95. The impact on aircraft gross weight of propulsion cycle characteristics such as bypass ratio, overall pressure ratio, turbine temperature, nacelle weight, and drag as well as the important criteria of noise is reviewed. ...The impact on aircraft gross weight of propulsion cycle characteristics such as bypass ratio, overall pressure ratio, turbine temperature, nacelle weight, and drag as well as the important criteria of noise is reviewed.
Technical Paper

Lear Fan Propulsion System

1980-04-01
800609
An aircraft propulsion system for Mach .6 flight is being developed which utilizes two turboshaft engines driving a pusher propeller through driveshafts and a combining gearbox.
Technical Paper

A Propulsion System for Orbit-to-Orbit Shuttle

1971-02-01
710770
The program is being conducted at Rocketdyne, a division of North American Rockwell Corporation, under the sponsorship of the Air Force Rocket Propulsion Laboratory under Contract F04611-67-C-0116. This paper summarizes the accomplishments of the program to date, and describes the engine system and its possible application to the orbit-to-orbit shuttle (OOS).
Technical Paper

Ramjet Propulsion for Single-Stage-to-Orbit Vehicles

1977-02-01
771011
Several ramjet propulsion systems are evaluated for future Earth-to-orbit transportation designed for reduced operational cost, reduced loads on payloads, and increased flexibility of launch site and schedule.
Technical Paper

C-5A Propulsion System Installation

1968-02-01
680333
The C-5A propulsion system installation is described and discussed. Induction system, exhaust system, and thrust reverser configurations define the general nacelle concepts.
Technical Paper

Performance Matching of the Propulsion System

1968-10-07
680712
The continuing requirement for weapon systems capable of efficient operation over a wide range of altitude, Mach number, and power setting emphasizes the importance of propulsion system off-design performance. This paper illustrates the effect of installation losses on this off-design performance and considers some of the limits on usable performance imposed by stability considerations.
Technical Paper

Propulsion Education at Carleton University

1993-04-01
931391
The paper gives an overview of the propulsion content of the programs at the undergraduate and postgraduate levels, as offered to students in both Mechanical and Aerospace Engineering.
Technical Paper

Commuter Turboprop Propulsion Technology

1980-09-01
801243
General Electric is conducting a Propulsion Study for NASA as part of the Small Transport Advanced Technology (STAT) program. The General Electric CT7 is used as the current modern turboprop engine baseline.
Technical Paper

Atlas Automated Propulsion Diagnostics

1995-05-01
951397
This paper presents the results achieved during the first year of this Atlas Propulsion Diagnostics Program and discusses the goals, approach, and accomplishments of the effort.
Technical Paper

Apollo Spacecraft Propulsion Systems

1969-02-01
690704
These crew safety requirements impose many unusual constraints that are not required in launch vehicle or unmanned propulsion system designs. These requirements and their effects on design and operation are discussed and the systems operational experience on Apollo models are presented.
Technical Paper

ATOMIC POWER And Aircraft Propulsion

1949-01-01
490173
This makes atomic energy attractive for aircraft propulsion, where it could combine high performance with large payload and long range. Chief obstacles in design of an atomic aircraft engine are development of light-weight shielding against deadly radiations; adequate cans to retain radioactive fission products; a pile capable of operating at high temperature and high thermal stresses; and a safe, flexible control mechanism.
Technical Paper

Nuclear Rockets for Interplanetary Propulsion

1960-01-01
600061
It is compared with the chemical rocket and the nuclear turboelectric ion propulsion system. In developing the concept for this low-power rocket, NASA engineers concentrated on attaining low weight and high hydrogen temperature, and on solving problems concerned with automatic control and operation of high-temperature reactors.
Technical Paper

Optical Diagnostics for Space Propulsion

1992-10-01
922057
Measurements of the gas state properties in hypersonic propulsion system research present unique problems demanding unconventional diagnostic measurement system design solutions.
Technical Paper

Propulsion Integration for Military Aircraft

1989-09-01
892234
This paper will identify some of the primary propulsion integration problems for high performance aircraft at transonic speeds, and demonstrate several methods for reducing or eliminating the undesirable characteristics, while enhancing configuration effectiveness.
Technical Paper

Shuttle Ferry Propulsion System

1973-02-01
730928
A unique propulsion system is being developed for the Space Shuttle Orbiter utilizing airbreathing engines to provide a means for horizontal flight testing and ferrying the Orbiter within the contiguous United States. ...The airbreathing engine arrangement which has resulted, while employing conventional propulsion subsystems, still possesses installation problems because of the low ground clearance.
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