Design of apparatus for the determination of aerodynamic drag coefficients of automobiles.
designofapparatu00grit.pdf (5.054Mb)Abstract
There are three major components of the total resistance to
motion of road vehicles: aerodynamic drag, rolling resistance
in the form of tire friction on road surfaces and mechanical
resistance in the form of bearing friction. Apparatus constructed
at the Naval Postgraduate School, Monterey, California
employs the measurement of total drag (aerodynamic drag +
rolling resistance drag + mechanical drag) by means of coastdown testing and the measurement of rolling resistance and
mechanical drag in an aerodynamic shielding trailer to determine
the aerodynamic drag.
Data acquisition and reduction is carried out with a portable
dedicated minicomputer system. The apparatus is designed to
yield drag coefficients with an estimated uncertainty of about
one percent.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
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