Abstract In the commented paper, an equation is generated for the acceleration that a passive (class A) stellar engine, or ‘Shkadov thruster’, is capable of producing. However, the equation listed in the commented paper is incorrect—one of the assumptions it is based off of is erroneous, and it does not properly account for the reflectivity of the Shkadov thruster's mirror surface. Here, we derive the correct equation. In summary, the geometric prefactor of Eq. 1 in the commented paper, given as (1/2 + 1/6)ε, should instead be (3/4)ε.

    Highlights Recent paper on stellar engines (Acta Astronautica 165: 96–104, 2019) is discussed. In commented paper, equation for acceleration of a Shkadov thruster is incorrect. Here, the correct equation in derived.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Comments on “Stellar engines: Design considerations for maximizing acceleration”


    Beteiligte:

    Erschienen in:

    Acta Astronautica ; 179 ; 495-497


    Erscheinungsdatum :

    2020-11-20


    Format / Umfang :

    3 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Design considerations for maximizing cooling package performance

    Bhatnagar, Bhaskar / Schlesinger, Dan | Tema Archiv | 2009


    Considerations in Designing the Airbreathing Engines for a Spaceplane Acceleration Mission

    Sippel, M. / Pohl, M. / AIAA | British Library Conference Proceedings | 1996


    Study on Maximizing Exergy in Automotive Engines

    Endo, T. / Kawajiri, S. / Kojima, Y. et al. | British Library Conference Proceedings | 2007