FLIGHT TESTS OF NACA <ill'l ' PROPUIBION EXIfAUST STACKS

NACA WARTIME REPORTS are reprints of papers originally issued to provide rapid distribution of advance r esearch results to an author ized group requiring them for the war effort. They were pre-viously held under a security status but are now unclass ified. Some of these reports were not tech-nically edited. All have been reproduced without change in order to expedite general distribution