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  Partner: UNT Libraries Government Documents Department
 Decade: 1970-1979
 Year: 1976
 Collection: Technical Report Archive and Image Library
Spin tests of a low-wing monoplane to investigate scale effect in the model test range, May 1941

Spin tests of a low-wing monoplane to investigate scale effect in the model test range, May 1941

Date: January 1, 1976
Creator: Donlan, C. J.
Description: Concurrent tests were performed on a 1/16 and a 1/20 scale model (wing spans of 2.64 and 2.11 ft. respectively) of a modern low wing monoplane in the NACA 15 foot free-spinning wind tunnel. Results are presented in the form of charts that afford a direct comparison between the spins of the two models for a number of different conditions. Qualitatively, the same characteristic effects of control disposition, mass distribution, and dimensional modifications were indicated by both models. Quantitatively, the number of turns for recover and the steady spin parameters, with the exception of the inclination of the wing to the horizontal, were usually in good agreement.
Contributing Partner: UNT Libraries Government Documents Department
Standard X-ray Diffraction Powder Patterns: Section 13. Data for 58 substances

Standard X-ray Diffraction Powder Patterns: Section 13. Data for 58 substances

Date: June 1976
Creator: Morris, Marlene C.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
[United States National Bureau of Standards Metric Conversion Card]

[United States National Bureau of Standards Metric Conversion Card]

Date: May 1976
Creator: United States. National Bureau of Standards.
Description: Conversion card issued by the United States National Bureau of Standards containing conversion information for length, area, mass (weight), volume, and temperature (exact). The front lists "Approximate Conversions to Metric Measures" and includes a continuum of temperatures at the bottom and a centimeter ruler along the right side (to 8 cm.). The back of the card lists "Approximate Conversions from Metric Measures" and includes an inch ruler along the right side (to 3 in.).
Contributing Partner: UNT Libraries Government Documents Department
What About Metric?

What About Metric?

Date: October 1976
Creator: Barbrow, Louis E. & Halpin, Suellen
Description: Pamphlet issued by the United States National Bureau of Standards discussing the reasons that the U.S. decided passed the Metric Conversion Act of 1975 and provides tables, illustrations, and formulas for converting between customary units and metric units of measuring weight, length, volume, and temperature. It also includes a discussion of how one might expect to use metric measurements in the marketplace, in the home, and at work.
Contributing Partner: UNT Libraries Government Documents Department
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