Accession Number:

AD0257803

Title:

AERODYNAMIC CHARACTERISTICS AT A MACH NUMBER OF 3.10 OF SEVERAL FOURTH-STAGE SHAPES OF THE SCOUT RESEARCH VEHICLE

Descriptive Note:

Corporate Author:

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON D C

Personal Author(s):

Report Date:

1961-06-01

Pagination or Media Count:

1.0

Abstract:

A wind-tunnel investigation was made at a Mach number of 3.10 Reynolds number per foot of 16.3 x 10 to the 6th power to 16.9 x 10 to the 6th power to determine the aerodynamic characteristics of various modifications of the payload section of the fourth stage of the Scout research vehicle. It was found that, for the combination of stages 3 and 4, increasing the size of the nose of the basic Scout to provide a cylindrical section of the same diameter as the third stage increased the normal-force slope by about 30 percent, the axial force by about 39 percent, and moved the center of pressure forward by about one fourth-stage base diameter. By reducing the diameter of the cylinder, at about one nose length behind the base of the enlarged nose frustum, to that of the basic Scout and thereafter retaining the shape of the basic Scout, the center of pressure was moved rearward by about one-half fourthstage base diameter at the expense of an additional 19-percent increase in axial force. A spikehemisphere configuration had the largest forces and moments and the most forward center-of-pressure location of the configurations considered. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE