INVESTIGATION OF THE NACA 4-(5)(05)-037 SIX- AND EIGHT-BLADE, DUAL-ROTATION PROPELLERS AT POSITIVE AND NEGATIVE THRUST AT MACH NUMBERS UP TO 0.90, INCLUDING SOME AERODYNAMIC CHARACTERISTICS OF THE NACA 4-(5) (05)-041 TWO- AND FOUR-BLADE, SINGLE-ROTATION PROPELLERS

摘要

An investigation has been made to determine the aerodynamic characteristics of the NACA 1+-(5) (05)-037 six- and eight-blade, dual-rotation propellers when operating at positive and negative thrust at Mach numbers up to 0.90 and when operating at near static conditions. The dual-rotation propellers were operated in combination with a long spinner and at blade angles from -20° to 70°。 The aerodynamic characteristics of the sixblade propeller when operating at positive thrust with an NACA 1-series spinner were also determined through a Mach number range from 0.60 to 0.90 for a blade angle of 650. Results of limited tests made to determine the aerodynamic characteristics of the NACA k-(5)(05)-C4l two- and four-blade, single-rotation propellers when operating at negative thrust are also included for comparison. All tests were made at an angle of attack of 0°, and the majority of tests were conducted at a Reynolds number of 1.0 million per foot.