NDLI: Effect at high subsonic speeds of fuselage forebody strakes on the static stability and vertical-tail-load characteristics of a complete model having a delta wing (Document No: 19980227774)

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Effect at high subsonic speeds of fuselage forebody strakes on the static stability and vertical-tail-load characteristics of a complete model having a delta wing (Document No: 19980227774)

Content Provider	NASA Technical Reports Server (NTRS)
Copyright Year	1961
Description	A wind-tunnel investigation at high subsonic speeds has been conducted to determine the effect of fuselage forebody strakes on the static stability and the vertical-tail-load characteristics of an airplane-type configuration having a delta wing. The tests were made at Mach numbers from 0.60 to 0.92 corresponding to Reynolds numbers from 3.0 x 10(exp 6) to 4.2 x 10(exp 6), based on the wing mean aerodynamic chord, and at angles of attack from approximately -2 to 24 deg. The strakes provided improvements in the directional stability characteristics of the wing-fuselage configuration which were reflected in the characteristics of the complete configuration in the angle-of-attack range where extreme losses in directional stability quite often occur. It was also found that the strakes, through their beneficial effect on the wing-fuselage directional stability, reduced the vertical-tail load per unit restoring moment at high angles of attack. The results also indicated that, despite the inherent tendency for strakes to produce a pitch-up, acceptable pitching-moment characteristics can be obtained provided the strakes are properly chosen and used in conjunction with a wing-body-tail configuration characterized by increasing stability with increasing lift.
File Size	1724742
Page Count	32
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19980227774
Archival Resource Key	ark:/13960/t3jx33k59
Language	English
Publisher Date	1961-05-01
Access Restriction	Open
Subject Keyword	Aircraft Stability And Control Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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