After a short review of the work done in the past to reduce the aerodynamic drag of a body moving in the vicinity of the ground, a new theoretical method is developed in order to determine the shape of the body when a certain lift distribution is imposed. Considerations on the induced drag suggest that the total lift is zero as also should be zero the pitching moment for stability reasons. These conditions together with that of gradual variation of the area and shape of the cross sections of the body lead to the determination of the basic shape of the body. A model was realized and tested on the Pininfarina wind tunnel. The results show a good substantiation of the theory and a very low drag coefficient. The dimensions of the model where such as to achieve the actual Reynolds numbers of motor cars. Energy implications of a reduction on the aerodynamic drag are also indicated.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    The Body Shape of Minimum Drag


    Additional title:

    Sae Technical Papers


    Contributors:
    Cogotti, A. (author) / Morelli, A. (author) / Fioravanti, L. (author)

    Conference:

    1976 Automotive Engineering Congress and Exposition ; 1976



    Publication date :

    1976-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English


    Keywords :


    The body shape of minimum drag

    Morelli,A. / Fioravanti,L. / Cogotti,A. et al. | Automotive engineering | 1976



    Minimum induced drag airfoil body Patent

    Cone, C. D., Jr. | NTRS | 1966


    Minimum induced drag airfoil body Patent

    Cone, C. D., Jr. | NTRS | 1970