Page 121 - Theory and Design of Air Cushion Craft
P. 121
Sidewall water friction drag 105
Fig. 3.18 Running attitude of SES model on cushion: (a) F r = 0.239 (during take-off); (b) f, = 2.15 (post take-
off).
Fig. 3.19 Water contact phenomenon of bow seal during take-off.
Owing to the smaller inner wetted surface area by comparison with the outer one
and also the difficulty in photographing the inner wetted surface, the total area of wet-
ted surface is estimated as
