Investigation of the Aerodynamic Characteristics of a Model Wing-propeller Combination and of the Wing and Propeller Separately at Angles of Attack Up to 90°

Investigation of the Aerodynamic Characteristics of a Model Wing-propeller Combination and of the Wing and Propeller Separately at Angles of Attack Up to 90°
Author: John W. Draper
Publisher:
Total Pages: 82
Release: 1954
Genre: Aerodynamics
ISBN:
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This report presents the results of an investigation conducted in the Langley 300 mph 7- 10-foot wind tunnel for the purpose of determining the aerodynamic characteristics of a model wing-propeller combination, and of the wing and propeller separately at angles of attack up to 90 degrees. The tests covered thrust coefficients corresponding to free-stream velocities from zero forward speed to the normal range of cruising speeds. The results indicate that increasing the thrust coefficient increases the angle of attack for maximum lift and greatly diminishes the usual reduction in lift above the angle of attack for maximum lift.

Preliminary Investigation of the Characteristics of a Two-dimensional Wing and Propeller with the Propeller Plane of Rotation in the Wing-chord Plane

Preliminary Investigation of the Characteristics of a Two-dimensional Wing and Propeller with the Propeller Plane of Rotation in the Wing-chord Plane
Author: David H. Hickey
Publisher:
Total Pages: 12
Release: 1957
Genre: Aerodynamic load
ISBN:
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The aerodynamic characteristics of a wing-propeller combination with the propeller rotating in the wing-chord plane of a two-dimensional wing were investigated. The wing had a 4-1/2-foot chord length. Total static lift was measured with and without the wing for a 3-foot-diameter propeller; the effects of a ground plane on the static lift of the wing-propeller combination were measured with a 2-foot-diameter propeller. Lift and pressure distributions at several angles of attack and free-stream airspeeds from 0 to 93 feet per second were obtained with the 3j-foot diameter wing-propeller combination.

Aerodynamic Characteristics of a General Tilt-wing/propeller Model Tested at Slow Speeds and High Angles of Attack

Aerodynamic Characteristics of a General Tilt-wing/propeller Model Tested at Slow Speeds and High Angles of Attack
Author: Joseph James Traybar
Publisher:
Total Pages: 90
Release: 1968
Genre:
ISBN:
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The aerodynamic characteristics of a general tilt-wing/propeller model were investigated at the Princeton Dynamic Model Tract Facility. The experiments included test conditions corresponding to free-stream velocities from slow backward flight through hovering and transition. Wing incidence angles ranging from 30 degrees (forward flight) to 90 degrees (hovering flight) were investigated. The experimental data are presented in graphs of lift, horizontal force, and pitching moment versus thrust in coefficient form based on free-stream velocity. (Author).

Aerodynamic Characteristics of a Small-Scale Shrouded Propeller at Angles of Attack from 0 Deg to 90 Deg

Aerodynamic Characteristics of a Small-Scale Shrouded Propeller at Angles of Attack from 0 Deg to 90 Deg
Author:
Publisher:
Total Pages: 14
Release: 1955
Genre:
ISBN:
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An investigation has been made to determine the effects of airspeed and angle of attack on the lift, drag, and pitching moment of a shrouded-propeller model, having a shroud length of about two-thirds the propeller diameter, over an angle-of-attack range from 0 deg to 90 deg. Tests were made of the complete model with the propeller operating and also of the shroud and motor combination with the propeller removed. The effect of inlet-lip cross-sectional radius on the static-thrust characteristics was also studied. These tests were made in connection with the design of a vertical-take-off free-flight model and the results are presented herein without analysis as it is felt that they may be useful in the design or analysis of other aircraft.