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    An Investigation into the Nature and Control of Vortex Flow Round Helicopter Upsweep

    A. E. Gibson / P. F. Newrick | NTIS | 1983
    The nature of the vortex flow around a helicopter fuselage with a view to flow control is examined. Tests are carried out with a specific ...

    Aircraft Gas Turbine Emissions: Their Nature, Technology for Reduction, and a Pollution Comparison with Channel Tunnel Transport

    P. J. Heard | NTIS | 1990
    pollution levels are compared with other modes of transport. The nature of gas turbine emissions and the available technology for reducing emission ...

    NASA & Ames Research Center Introduction

    W. R. Van Dalsem | NTIS | 2019
    are overview in nature and have been presented previously in open forums. ...

    Peak-Seeking Optimization of Spanwise Lift Distribution for Wings in Formation Flight

    C. E. Hanson / J. Ryan | NTIS | 2012
    elliptical distribution is no longer optimal for the trailing wing in the formation due to the asymmetric nature of the encountered flow field ...

      Peak-Seeking Optimization of Spanwise Lift Distribution for Wings in Formation Flight

      C. E. Hanson / J. Ryan | NTIS | 2012
      formation due to the asymmetric nature of the encountered flow field. Control surfaces along the trailing edge of the wing can be configured to ...

    Epidemiology of Battle-Damaged Fixed-Wing Aircraft

    T. A. Greenwell | NTIS | 2010
    Battle damage is a natural side effect of armed conflict. History shows the prevalence of aircraft battle damage varies based on the nature ...

    System-Level Control Concepts for Electrified Aircraft Propulsion Systems

    D. L. Simon | NTIS | 2022
    burn, emissions, and noise. Due to their complex integrated nature, EAP systems present novel propulsion control challenges and opportunities ...

    Mixed Integer Programming Framework for the Fuel Optimal Guidance of Complex Spacecraft Rendezvous and Proximity Operation Missions

    A. S. LeValley | NTIS | 2019
    ) framework, through which, the combinatorial optimization and trajectory optimization nature of these problems are coupled, resulting in the fuel ...

    Adopting an Objectives-Driven Assurance Case Approach for Achieving Space Flight Mission Planetary Protection Objectives

    E. Seasly / J. N. Benardini | NTIS | 2022
    requirements may be easier to communicate and manage throughout the systems engineering process, the highly constrained nature of prescriptive ...

    Power and Propulsion Element (PPE) Spacecraft Reference Trajectory Document

    M. L. McGuire / S. L. McCarty / L. M. Burke | NTIS | 2020
    cislunar orbit transfer and end-of-mission (EOM) disposal trajectory. The flexibility of electric propulsion offers, by its low thrust nature ...

    Aeronautical Information Manual: Official Guide to Basic Flight Information and ATC Procedures, February 9, 2012

    NTIS | 2012
    safety, accident, and hazard reporting. Although the AIM is not regulatory in nature, parts of it re-state and amplify federal regulations. ...

    Ballistic Missile Defense Deployment in Japan: Regional Reaction and the Future Stability of East Asia

    J. S. Kawada | NTIS | 2004
    Ballistic missile defense deployment by Japan, while defensive in nature, has the potential to dramatically upset the balance of power and ...

    Development of a Multi-Disciplinary Aerothermostructural Model Applicable to Hypersonic Flight

    C. Kostyk / T. Risch | NTIS | 2013
    characteristics of hypersonic flight is the coupled, multi-disciplinary nature of the dominant physics. In an effect to examine some of the multi ...

    NASA’s MBSE Approach for Advanced Air Mobility

    J. Murphy | NTIS | 2022
    communities. Due to the nature of AAM cutting across multiple aspects of the aircraft, airspace, and community domains, NASA is applying tools and ...

    Developing Materials and Coating Technologies for Mitigation of Lunar Dust Adhesion and Abrasion

    V. Wiesner / L. Das / C. Wohl et al. | NTIS | 2020
    . Lunar dust poses a major threat to the durability of components and vehicles due to its fine, jagged morphology and highly abrasive nature ...

    Flight Simulator Demonstration and Certification Implications of Powertrain Failure Mitigation in a Partial Turboelectric Aircraft

    J. S. Litt / J. J. Sachs-Wetstone / D. L. Simon et al. | NTIS | 2023
    powertrain. The complexity and integrated nature of the partial turboelectric powertrain architecture presents failure modes and hazards not found in ...

    Developing Materials and Coating Technologies for Mitigation of Lunar Dust Adhesion and Abrasion

    V. L. Wiesner / L. Das / C. J. Wohl et al. | NTIS | 2020
    . Lunar dust poses a major threat to the durability of components and vehicles due to its fine, jagged morphology and highly abrasive nature ...

    Stability of Flight Vehicles in the Low Reynolds Number Non-Linear Regime

    E. E. Covert / O. W. K. Lee / C. M. Vaczy | NTIS | 1984
    of attack. Under these circumstances the aerodynamic characteristics of the vehicles are likely to be non-linear in nature. Here the nature ...

    Optimal Defense of High Value Airborne Assets

    I. E. Weintraub | NTIS | 2021
    : kinetic or directed energy. When defense if kinetic in nature, the defender launches a missile which strives to reach the threat before the threat ...

    On-Orbit Cryogenic Refueling: Potential Mission Benefits, Associated Orbital Mechanics, and Fuel Transfer Thermodynamic Modeling Efforts

    J. R. Clark | NTIS | 2021
    The placement of cryogenic fuel/propellant depot stations in Earth orbit has the potential to transform the nature and operations for many ...