An Investigation of the Effect of the WADC 30,000-Horsepower Whirl Rig Upon the Static Characteristics of a Propeller Page: 2 of 32
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NACA RM SL52F200 3 1176 01438 5703
NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS
". RESEARCH MEMORANDUM
to for the
* Air Materiel Command, U. S. Air Force
AN INVESTIGATION OF THE EFFECT OF THE
WADC 30,000-HORSEPOWER WHIRL RIG UPON THE
STATIC CHARACTERISTICS OF A PROPELLER
By Leland B. Salters, Jr., and Harry T. Norton, Jr.
Tests have been made at the Langley Aeronautical Laboratory on a
6000-horsepower propeller dynamometer installed at a ground test facil-
ity to determine the effect of a half-scale model of the Wright
Aeronautical Development Center 30,000-horsepower whirl rig upon the
aerodynamic characteristics of a three-blade NACA 10-(3)(062)-045 pro-
peller. The model of the whirl rig was mounted in front of the
6000-horsepower propeller dynamometer. Static propeller tests were
made for 0o, 50, 100, 150, and 200 blade angles over a range of rota-
tional. speeds from 600 to 2200 rpm in 100-rpm increments. Measurements
were made of propeller thrust and torque, stresses in the propeller
blades, and static and total pressures over the surface of the model.
Propeller thrust and torque were increased up to 33 percent by
the presence of the model of the whirl rig, but the average increase
was from 5 to 10 percent. Blade vibratory stresses were small.
During the design of the 30,000-horsepower propeller whirl rig at
the Wright Aeronautical Development Center, the National Advisory
Committee for Aeronautics was requested to conduct static propeller
tests upon a half-scale model of the proposed whirl rig. It was requested
that the half-scale model be tested in conjunction with a 6000-horsepower
propeller dynamometer at the Langley Laboratory, using a 10-foot, three-
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Salters, Leland B., Jr. & Norton, Harry T., Jr. An Investigation of the Effect of the WADC 30,000-Horsepower Whirl Rig Upon the Static Characteristics of a Propeller, report, July 2, 1952; (https://digital.library.unt.edu/ark:/67531/metadc64716/m1/2/: accessed April 20, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.