<DOC>
<DOCNO>
702
</DOCNO>
<TITLE>
numerical determination of indical lift and moment functions for a two
dimensional sinking and pitching airfoil at mach numbers 0.5 and 0.6 .
</TITLE>
<AUTHOR>
mazelsky, b. and drischler, j.a.
</AUTHOR>
<BIBLIO>
naca tn 2739, 1952 .
</BIBLIO>
<TEXT>
the indicial lift and moment functions are determined approximately for
sinking and pitching motion at mach numbers m of 0.5 and 0.6 . these
functions are determined from a knowledge of the existing oscillatory
coefficients at the low reduced frequencies and from approximate expressions
of these coefficients at the high reduced frequencies .
the beginning portion of the indicial lift function associated with an
airfoil penetrating a sharp-edge gust in subsonic flow is evaluated by
use of an exact method . by use of an approximate method for determining
 the remaining portion, the complete indicial gust function is determined
for m 0.5, m 0.6, and m 0.7 .
all the indicial lift and moment functions are approximated by an exponential
series,. the coefficients which appear in the exponential
approximations for each indicial function are tabulated for m 0.5,
m 0.6, and m 0.7 .
</TEXT>
</DOC>
