Pressure Distribution Tests on PW-9 Wing Models Showing Effects of Biplane Interference (open access)

Pressure Distribution Tests on PW-9 Wing Models Showing Effects of Biplane Interference

"In this report tests are described in which the distribution of pressures over models of the wings of the PW-9 Airplane was investigated. The wing models were tested individually and in the biplane combination. The investigation was conducted in the atmospheric wind tunnel of the National Advisory Committee for Aeronautics" (p. 315).
Date: April 7, 1927
Creator: Fairbanks, A. J.
System: The UNT Digital Library
Combustion Time in the Engine Cylinder and Its Effect on Engine Performance (open access)

Combustion Time in the Engine Cylinder and Its Effect on Engine Performance

"As part of a general program to study combustion in the engine cylinder and to correlate the phenomena of combustion with the observed performance of actual engines, this paper presents a sketchy outline of what may happen in the engine cylinder during the burning of a charge. It also suggests the type of information needed to supply the details of the picture and points out how combustion time and rate affect the performance of the engine. A theoretical concept of a flame front which is assumed to advance radially from the point of ignition is presented, and calculations based on the area and velocity of this flame and the density of the unburned gases are made to determine the mass rate of combustion" (p. 393).
Date: April 2, 1927
Creator: Marvin, Charles F., Jr.
System: The UNT Digital Library
Tests on Models of Three British Airplanes in the Variable Density Wind Tunnel (open access)

Tests on Models of Three British Airplanes in the Variable Density Wind Tunnel

"This report contains the results of tests made in the National Advisory Committee for Aeronautics variable density wind tunnel on three airplane models supplied by the British Aeronautical Research Committee. These models, the BE-2E with R.A.F. 19 wings, the British Fighter with R.A.F. 15 wings, and the Bristol Fighter with R.A.F. 30 wings, were tested over a wide range in Reynolds numbers in order to supply data desired by the Aeronautical Research Committee for scale effect studies. The maximum lifts obtained in these tests are in excellent agreement with the published results of British tests, both model and full scale" (p. 451).
Date: April 5, 1927
Creator: Higgins, George J.; Diehl, W. S. & DeFoe, George L.
System: The UNT Digital Library