Calculation of stick forces for an elevator with a spring tab /
Harry Greenberg.
Description
- Language(s)
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English
- Published
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Langley Field, VA : Langley Memorial Aeronautical Laboratory, 1944.
- Summary
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Summary: Formulas for the calculation of hinge-moment characteristics of an elevator with a spring tab have been developed in terms of basic aerodynamic parameters, spring stiffness, and airspeed. The formulas have been used in a study of the stick-force gradients on a pursuit airplane equipped with an elevator with a spring tab. Charts are presented showing the variation of stick-force gradient in accelerated flight over a large range of speed and the complete range of spring stiffness for various center-of-gravity locations, altitudes, and airplane sizes. It is shown that the stick-force gradient for the elevator with spring tab tends to decrease as the speed increases and for weak springs tends to approach the value corresponding to a pure servotab (no spring). This tendency is independent of altitude, size, or center-of-gravity location although the magnitudes vary with these parameters. The variation of stick-force gradient with center-of-gravity location is less for the spring-tab than for a linked-tab type of balance.
- Note
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"NACA WARTIME REPORTS are reprints of papers originally issued to provide rapid distribution of advance research results to an authorized group requiring them for the war effort. They were previously held under a security status but are now unclassified. Some of these reports were not technically edited. All have been reproduced without change in order to expedite general distribution."
"Report date June 1944."
"Originally issued June 1944 as Restricted Bulletin L4F07."
"Report no. L-129."
Also available in electronic format.
- Physical Description
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15, [6] p. :
ill. ;
28 cm.
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