Characteristics of Thin Triangular Wings with Constant-chord Partial-span Control Surfaces at Supersonic Speeds


Book Description

A theoretical analysis was made of characteristics of constant-chord partial-span control surfaces on thin triangular wings at supersonic speeds by use in methods based on linearized theory for supersonic flow. Two cases were treated: In one the flap extended outboard from the center of wing and in the other the flap extended inboard from wing tip. Expressions were found for lift coefficient, rolling-moment coefficient, and hinge-moment coefficient due to flap deflection, hinge-moment coefficient due to angle of attack, and pitching-moment coefficient due to flap lift. A few figures are given to illustrate application equations.




Characteristics of Thin Triangular Wings with Triangular-tip Control Surfaces at Supersonic Speeds with Mach Lines Behind the Leading Edge


Book Description

A theoretical analysis, based on the linearized equation for supersonic flow, of characteristics of triangular-tip control surfaces on thin triangular wings. By restriction to case for which Mach lines from wing apex lie behind the leading edge, a simplified treatment was possible; results of previous work on lift of triangular wings could be used to derive expressions for lift effectiveness, pitching moment, rolling-moment effectiveness, hinge moment due to control deflection, and hinge moment due to angle of attack. Comparisons were made with two-dimensional case.







Technical Note


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Some Theoretical Characteristics of Trapezoidal Wings in Supersonic Flow and a Comparison of Several Wing-flap Combinations


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The theoretical lift and pitching moment due to angle of attack and pitching and the lateral force and yawing moment due to rolling of a trapezoidal wing are derived. The equations are applicable when the inboard Mach line from a leading-edge tip intersects the trailing edge and the outboard Mach line lies ahead of the side edge. When the side edges are raked in, the former condition is sufficient. A comparison based on theoretical expressions of the lift and rolling effectiveness for half-delta tip (point forward) and trailing-edge flaps on various plan forms is made.




Research Memorandum


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Tests of Six Types of Bakelite-bonded Wire Strain Gages


Book Description

Tests were made to determine the important performance characteristics for six types of bakelite-bonded wire strain gages commercially available and in current use by the aircraft industry. Results on the following characteristics are presented: (1) uniformity of calibration factors for individual gages of the same type, (2) variation of calibration factor with temperature, (3) creep, (4) effect of current on gage resistance, and (5) variation of gage resistance with temperature.




Index of NACA Technical Publications


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