An investigation has been conducted in the Langley full-scale tunnel to determine the parasite drag of five production-type helicopter rotor hubs. Some simple fairing arrangements were attempted in an effort to reduce the hub drag. The results indicate that, within the range of the tests, changes in angle of attack, hub rotational speed, and forward speed generally had only a small effect on the equivalent flat-plate area representing parasite drag. The drag coefficients of the basic hubs, based on projected hub frontal area, increased with hub area and varied from 0.5 to 0.76 for the hubs tested.


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    Titel :

    Parasite-Drag Measurements of Five Helicopter Rotor Hubs


    Beteiligte:

    Erscheinungsdatum :

    1959-02-01


    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Parasite-Drag Measurements of Five Helicopter Rotor Hubs

    G. B. Churchill / R. D. Harrington | NTIS | 1959



    Reduction of helicopter parasite drag

    Harrington, R.D. | Engineering Index Backfile | 1954



    Flight Researches on Reducing Helicopter Parasite Drag

    Akimov, A. / Vozhdaev, U. / Associazione Italiana di Aeronautica ed Astronautica et al. | British Library Conference Proceedings | 1993