• Version
• 146 Downloads
• 3.04 MB File Size
• 1 File Count
• November 25, 2016 Create Date
• November 25, 2016 Last Updated

National Advisory Committee for Aeronautics, Technical Notes - Analysis of a Strut with a Single Elastic Support in the Span, with Applications to the Design of Airplane Jury Strut

The problem of a precise method of analysis for air-
plane jury-strut systems was selected by Mr. A. Murray
Schwartz as the subject of his Engineer‘s thesis at
Stanford University. Mr. Schwartz‘s study resulted in the
derivation of suitable theoretical equations and the de—
velopment of a system of using them in practical design.
He did not have time, however.,to carry out any experi— ;
mental work to prove the validity of his formulas. In the ”
winter of 1933—34 another graduate student at Stanford, '
Mr. Reid Bogert, made the experimental investigation of
Mr. Schwartz‘s formulas the subject of his Engineer‘s the—
sis. and obtained data to prove their validity.

Owing to the length of these theses, the N.A.C.A.
did not consider it advisable to publish them in full, but
accepted the offer of the writer, under whose'direction
the two theses were prepared, to combine them into a sin-
gle report of length suitable for publication. The work ‘
of the writer has been primarily editorial, the theoret— '
ical derivations of the first part of the report being
that of Schwartz, and the experimental work of the second
part that of Bogert. While the theses on which the pres-
ent report is based were written under the direction of
the writer, his supervision was not very close and by far
the greater part of the credit belongs to the two students.

The title of Schwartz's thesis was "Structural Analy-
sis of Airplane Jury Strut Systems". Study of the prob-
lem showed that its essential feature was the analysis of
a strut with a single elastic support at any specified
point between its ends. This is a general problem of . ‘
which the airplane jury—strut system is only a special
case. Bogert‘s thesis was accordingly entitled “Tests on
Struts with a Lateral Elastic Support in the Span". The
title of the present paper was chosen to indicate both the
essential problem attacked and its most important appli—
cation in aeronautical design.