Nowaekt and Sharma 
Calculated effective wakes WEp versus nominal wakes Wp 
\ 
Hess and Smith Program 
0...2 
0.3 
0.4 
05 
0.6 
On7 
0.8 
0:59 
20 
It is seen that the calculated effective wake wp is 2 to 4% 
higher than the calculated nominal wake Wp > depending upon propel- 
ler loading of which the source strength o is ameasure . This is 
exactly what one would expect from theoretical considerations , since 
the propeller sinks induce extra sink strength in the afterbody which 
in turn induces an additional positive wake in the propeller plane . 
However , the difference is too small to have a significant effect on 
the calculation of thrust deduction . 
1914 
