TURBINE STEAM YACHT WINCHESTER. 69 
APPENDIX. 
From the curves on Plate 55 it will be noticed that the propulsive coefficients 
are rather high, especially at the lower speeds. On this account, the writer thought 
that it would be of interest to analyze the propellers by Dyson’s method, as pub- 
lished by Lieut. S. M. Robinson, U. S. Navy, in the Journal of American Society of 
Naval Engineers, Vol. XXVIII, No. 4, November, 1916. The calculations are as 
follows :— 
Slip B.C. =.375 
PA+DA  =.60 
Pitch =4.25 
Diameter =4.58 
TS. =13,550 
R-TS-+-nD=942 
PxR = 4,000 
LTe =I11I.94 
1-S =.786 
Px Rx (1-5) 
V oe cue = 31.00 
IV =2 
Nx D’x1 Tdx(PxkR) 
IGEEP: - 291.8 = 6,860 
EC: =.525 
E.H.P. =1.H.P.x PC=3,605 
I.H.P.x.92 
S.H.Pd rane 
Sx hoc aa 
Ss = Io’ xu 
S.H.P. 
from 
curve 
7430 
6690 
5955 
5240 
4535 
3850 
3210 
2610 
2035 
1530 
