Stability and control characteristics determined from tests in the Langley 19-foot pressure tunnel of a 0.2375-scale model of the Douglas XA-26 airplane are compared with those measured in flight tests of a Douglas A-26b airplane. Several designs of nitrided-steel piston rings were performance-tested under variable conditions of output. The necessity of good surface finish and conformity of the ring to the bore was indicated in the preliminary tests. Nitrided-steel rings of the same dimensions as cast-iron rings operating on the original piston were unsatisfactory, and the final design was a lighter, rectangular, thin-face-width ring used on a piston having a maximum cross-head area and a revised skirt shape. Results were obtained from single-cylinder and multicylinder engine runs.


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    Title :

    Nitrited-Steel Piston Rings for Engines of High Specific Power


    Contributors:

    Publication date :

    1945-01-01


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English



    Nitrided-steel piston rings for engines of high specific power

    Collins, Jr., J.H. / Bisson, E.E. / Schmiedlin, R.F. | Engineering Index Backfile | 1944




    Nitrited Steel Piston Rings for Internal Combustion Engines

    Tomanik, Eduardo / Vatavuk, Jan / Demarchi, Valmir | SAE Technical Papers | 1994