Position Errors of the Service Airspeed Installations of 10 Airplanes
Abstract
Calibrations of the static-pressure or "position" errors of the service airspeed installations of 10 present-day airplanes are presented. The installations are representative of most of the systems in use at the present time and include static-pressure vents on the nose and the rear section of the fuselage and pitot-static tubes mounted on the wing, the vertical tail, and the nose of the fuselage. Each of the installations was calibrated under steady flight conditions by means of a trailing static-pressure tube. The tests were conducted from speeds near the stall to maximum indicated speeds not exceeding 260 miles per hour. Calibrations of representative flight conditions (climb, glide, Wave-off, and landing) were obtained in order to show the variation of static-pressure error with engine power and flap setting. The position errors for the various flight conditions are presented as static-pressure errors and as airspeed and altitude errors. Analysis of the data presented showed that the static-pressure error for static vents on the rear section of the fuselage remained approximately constant with angle of attack and became more negative with flap deflection. The static-pressure errors for the wing, fuselage-nose, and vertical-tail installations became more negative with increasing angle of attack and more positive with flap deflection; the effect of engine power for these installations followed no consistent trend.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1949
- Accession Number
- ADA380433
Entities
People
- William Gracey
Organizations
- National Aeronautics and Space Administration