This standard applies to propeller fans that are used in heating, ventilating, refrigerating, and air-conditioning equipment and that

a. are constructed of built-up or of monolithic materials,

b. may include a slinger ring or hub, or both, and

c. are direct or belt driven.

This test method characterizes the fan in the application for which it is intended.

PURPOSE

The purpose of this standard is to establish a method of testing propeller fans to measure the dynamic characteristics that are essential in the proper selection and application of such fans to minimize the potential for fatigue failure.