Dagan 
DISCUSSION 
Ernest O. Tuck 
Untverstty of Adelatde 
Adelaide, Australta 
In the first instance I want to pass on a comment that Dr. 
Salvesen asked me to make on his behalf because he could not be 
here today. Incidentally, I agree with his comment. The comment 
concerns neglect of the Kutta condition at the trailing edge of these 
two-dimensional bodies. In fact both Dr. Salvesen and I fell that our 
own original papers on these two-dimensional problems were defi- 
cient, in that we should have included the Kutta condition in the first 
order solutions. We are a little disappointed that in doing this pro- 
blem again, Dr. Dagan has not seen fit to include the Kutta condition, 
for reasons which he has stated but with which we do not really agree. 
My own comment is actually relevant to Dr. Salvesen's 
work, in that I feel that perhaps insufficient attention was paid to 
Dr. Salvesen's paper of a couple of years ago. Dr. Salvesen himself 
was aware of what Dr. Dagan has called the ''second low Froude 
number paradox''. He analysed this in some detail in this paper, and 
perhaps some direct reference could have been made to this work. 
DISCUSSION 
Edmund V. Telfer 
i NeAte 
Ewell, Surrey, U.K. 
I want to ask a very innocent question. Could the author tell 
me what he intends to be the significance of the word "'naive''* in the 
* According to the Oxford Dictionary the meaning of naive is '' Cha- 
racterised by unsophisticated or unconventional simplicity or artless- 
ness. 
1736 
