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An off-design axial-flow compressor code is presented and is available from COSMIC for predicting the aerodynamic performance maps of fans and compressors. Steady axisymmetric flow is assumed and the aerodynamic solution reduces to solving the two-dimensional flow field in the meridional plane. A streamline curvature method is used for calculating this flow-field outside the blade rows. This code allows for bleed flows and the first five stators can be reset for each rotational speed, capabilities which are necessary for large multistage compressors. The accuracy of the off-design performance predictions depend upon the validity of the flow loss and deviation correlation models. These empirical correlations for the flow loss and deviation are used to model the real flow effects and the off-design code will compute through small reverse flow regions. The input to this off-design code is fully described and a user's example case for a two-stage fan is included with complete input and output data sets. Also, a comparison of the off-design code predictions with experimental data is included which generally shows good agreement.

1Frithiof Saga

By Ferdinand Schmidt

Iceland is the home of the Saga, a form of literature which includes the telling of the story of a hero’s life and adventures in a fixed, regular form, and which is usually intended for recitation, though the Saga is never set in the customary versified style of poetry. A large number of these Sagas, relating to Iceland, Greenland, North America, and the Norse countries, still remain, and among them the Frithiof Saga, narrating the stirring adventures of that hero of the Northland and Viking of its seas, is one of the most beautiful. Its subject is noble, heroic, and free from exaggerated description or overwrought sentiment. Frithiof is a splendid type of the old Norse hero, invincible in battle upon the land, fearless of Nature’s wrath as he sails the seas in his dragon ship, impulsive yet just, swift in punishment yet quick in forgiveness. The central motives of the Saga are his love for King Bele’s daughter, Ingeborg; the refusal of her brothers to sanction their marriage because the hero is not of royal birth; her unwilling marriage to the old King Ring; Frithiof’s exile, and his final union with Ingeborg after the death of her husband and reconciliation with her brother. Interwoven with the narrative itself, which is full of dramatic situations, are some of the old myths, than which none is more beautiful than the death of the gentle god Balder. The very breath of the North sweeps through the stately story which the German author has told with so much skill. Those who wish to come in closer contact with the Saga itself can do so by consulting Bishop Tegner’s masterly translation. - Summary by George Upton

2Gudrun

By Ferdinand Schmidt

The charming story of “Gudrun” is a romance of the old heroic period, written by some unknown poet of Austria or Bavaria in the thirteenth century. Next to the "Nibelungen Lied," it is the most important of the German epic poems...The same elemental passions are depicted. The men are brave, vigorous heroes, rejoicing in battle and feats of prowess; the women are beautiful, constant, and courageous. There are many fine delineations of character in the original, as well as vigorous sketches of northern scenery. The figure of Gudrun stands out in bold relief among the maidens. There are few more beautiful characters, indeed, in the poems of the old heroic period...Gudrun’s name is always spoken by her people with reverence. "Her courage and constancy were extolled by them, and in after days her fame was as radiant as the stars in the heavens." (George P. Upton, Translator's Preface)

3George Washington

By Ferdinand Schmidt

Among all the numerous life stories written by Ferdinand Schmidt for the delectation and education of German youth, none surpasses that of Washington. The author has condensed his material, drawn from the most authoritative sources, in a masterly manner, and presents it in a very attractive form. He has accompanied it by moralization which is pertinent, but never becomes tedious. It is questionable, indeed, whether any story of Washington’s life written for young people excels Schmidt’s in accuracy, conciseness, and general interest. As such this sketch of the Father of his Country from a German point of view is commended to American youth. -- Translator's Preface - Summary by George P. Upton