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Year:
1946
Month:
April
Serial/Series Title:
NACA Advanced Confidential Report
Serial/Series Title:
NACA Wartime Reports
Collection:
Technical Report Archive and Image Library
Field of Flow About a Jet and Effect of Jets on Stability of Jet-Propelled Airplanes
Date: April 1, 1946
Creator: Ribner, Herbert S.
Description: A theoretical investigation was conducted on jet-induced flow deviation. Analysis is given of flow inclination induced outside cold and hot jets and jet deflection caused by angle of attack. Applications to computation of effects of jet on longitudinal stability and trim are explained. Effect of jet temperature on flow inclination was found small when thrust coefficient is used as criterion for similitude. The average jet-induced downwash over tail plane was obtained geometrically.
Contributing Partner: UNT Libraries Government Documents Department
Permallink:digital.library.unt.edu/ark:/67531/metadc62555/
Critical Mach Numbers of Thin Airfoil Sections with Plain Flaps
Date: April 1, 1946
Creator: Pardee, Otway O'm.
Description: Critical Mach number as function of lift coefficient is determined for certain moderately thick NACA low-drag airfoils. Results, given graphically, included calculations on same airfoil sections with plain flaps for small flap deflections. Curves indicate optimum critical conditions for airfoils with flaps in such form that they can be compared with corresponding results for zero flap deflections. Plain flaps increase life-coefficient range for which critical Mach number is in region of high values characteristic of low-drag airfoils.
Contributing Partner: UNT Libraries Government Documents Department
Permallink:digital.library.unt.edu/ark:/67531/metadc61295/