184 S. Schuster and H. Schwanecke 
The function f (7) takes care of the depth of submergence, i.e., 
where 
h = h,(1 - 7) 
=h,-b7sin®. 
Herewith the moment M, may be written as 
= 4 = =2 
My = pu, be Ci ka kpPK, =) TN Laat K; dj (28) 
0 
The derivatives of the moments relative to the single parameters are 
OM 1 2 OK, 4 1 ee = 
ame 2 = 5 Puy be*C, Ky Kp b ay a gS ool ae ae 
A,5,h, A 6 
OM io Girne SES e 
= = 5 Pug? bo? Cy KRpK, oT | 7) 1-77 Kr _ dj (29b) 
Ob | 4.8,h A ye J 
151h9 
om 1 b an 4 : = —2 OK; = 
Ba! Brin uy bc?C, K,Kpb K, s/ Avi q> eae (29c) 
At ane oh |; 
Herewith the total change of moment relative to the lowest point of the dihedral becomes 
om -2 4 OK , Fy 
x = -opu*bc?C, K.K, cos 8b) —|=— : 
dp ae (Day Loa” P m | 0A |, sin @ 
QF, i 
+ it 30 
a A \b sin 8 < yee 
and 
dc 
M OK F 
z ‘ Bey (anata ye LE, d +, (30b) 
“dB AB, = Cri ie cos#b , oA|, sin 6 i= 4 
