Castagneto and Maioli 



0.12 

 t„/c 



Fig. 6 - Lift coefficient at shock-free entry- 

 conditions versus { /c and t /c. 



but in this simple equation the lift coefficient, caused by incidence, does not de- 

 pend on thickness ratio. 



However, the values of a'v^^^ do depend on thickness, as is shown by relation 

 (8), which, taken as a whole, always has to be equal to one; but this does not 

 mean that 



c J a. 



dc = \ and 



4) 



v^ ^•v^ dc -- 



The dependence of A'V'^ and of A'v^^ on thickness is not linear, especially in the 

 proximity of the leading edge. Most authors realize the required lift coefficient 

 only by camber, that is, at shock-free entry condition; therefore there is no 

 question, whatever expression be used for c^^, but, as will be shown later on, it 

 is advantageous to operate both with camber and with a little amount of inci- 

 dence as well. 



1028 



