Ming-Shun Chang 
BLOWER RPM DIRECTION” PERION 
12 1000 RPM N 25 SEC 
>>> G00 RPM w 25 SEC 
==. (O0;REM N 25 SEC 
N 600 RPM Ww 25 SEC 
— — 700 RPM N 25 SEC 
10 ee 600 RPM Ww 2.5 SEC | 
alee 
1 
| 
i 
| 
6 
3 | 
iu | 
* \ 
” ' 
: | 
ww j 
; % I 
a \ | 
) 
/ \ | 
/ \ Os 
74 
N Ww 
-4 
-1.0 -0.5 0.0 05 1.0 
Figure 10 Measured directional spectra of 2.5 sec. period waves 
only, with array 45° to West bank 
1358 
