4/y
J o u r n a l o f t h e R o y a l I n s t i t u t i o n of N a v a l A r c h i t e c t s
Published quarterly In January, July and October by t h e R I N A , 10 Upper Belgrave Street, L o n d o n S W 1 X 8 B Q . T e l e p h o n e ; 01 235 4622/3 T e l e g r a m s ; Sinai, L o n d o n . Printed by U n w i n B r o t h e r s Limited Old W o k i n g , Surrey Editor: R. F. Burnett, B S c , M R I N A . A p r i l ,
Cover illustration: Seas curling over the forecastle, during an investigation Into s l a m m i n g by Lloyd's Register on t h e fast cargo ship ' S n o w Drift' owned by Salen S h i p p i n g .
T h e I n s t i t u t i o n Is not as a body, r e s p o n -sible f o r opinions expressed in ' T h e Naval A r c h i t e c t ' unless it is expressly stated that t h e s e are the C o u n c i l ' s views.
T h i s publication Is c o p y r i g h t . A l l rights reserved. T h e Editor will c o n s i d e r written r e q u e s t s t o reproduce articles a n d illustra-t i o n s appearing in illustra-t h e J o u r n a l . Mulillustra-tiple c o p y i n g o f t h e c o n t e n t s w i t h o u t permission Is illegal. A B C Audited circulation: January-December 1973 6 447 S U B S C R I P T I O N R A T E S ; Single copy £3.50 ($8.50) One year £12.00 ($29.00)
Free t o members of the I n s t i t u t i o n . J A N U A R Y 1975
THE NAVAL
ARCHITEC
A N U A R Y 1 9 7 5 1 C O N T E N T S M a i n A r t i c l e s c l a s s e s of c o n t a i n e r s h i p s in t h e T h e e f f e c t of weathé N o r t h A t l a n t i c by P r o f e s s o r G. A e r t s s e n , F R I N A S p e c i a l T r a d e P a s s e n g e r s h i p s by S. V . B h a v e , M S c , a n d M. K. G h o s h Roy, P h D , F R I N A A n I t a l i a n s h i p y a r d g e a r e d t o s e r i e s p r o d u c t i o n of V L C C s S h o r t e r A r t i c l e s First c h e m i c a l t a n k e r f o r B e n L i n e P e r f o r m a n c e p r e d i c t i o n d i s c u s s e d by t h e R I N A S m a l l C r a f t G r o u p I m p r o v e d g e n e r a l q u a d r i l a t e r a l plate e l e m e n t s by I. T o r b e , M S c , P h D , a n d K. C h u r c h , F R I N A B r i t i s h - b u i l t p a t r o l b o a t s in d e m a n d S o m e f a c t s a b o u t B r i t i s h s h i p b u i l d i n g D e v e l o p m e n t s in h o v e r c r a f t a n d h y d r o f o i l s — 1 9 7 4 H M S ' A m a z o n ' s f i r s t s i x m o n t h s In s e r v i c e M a r i n e r e s e a r c h at H a r w e l l a n d o t h e r U K A E A l a b o r a t o r i e s R e g u l a r F e a t u r e s E d i t o r i a l C o m m e n t s , 7 Q u a r t e r l y N e w s R e v i e w 8 B o o k R e v i e w s 24 R e s e a r c h N o t e s 26 L e t t e r s t o t h e E d i t o r T e c h n i c a l M e e t i n g s R I N A P u b l i c a t i o n s R I N A A F F A I R S i n c l u d i n g F o r t h c o m i n g m e e t i n g s , n e w p a p e r s f o r w r i t t e n d i s c u s s i o n C o m p u t e r s in S h i p b o a r d A u t o m a t i o n : C o n f e r e n c e p a p e r s A n n u a l D i n n e r , r e p o r t o n t h e O c e a n E n g i n e e r i n g S y m p o s i u m B r a n c h N e w s P e r s o n a l N o t e s , r e v i s e d B y - L a w s T E C H N I C A L P A P E R S ( w i t h d i s c u s s i o n a n d a u t h o r s ' r e p l i e s ) T h e S t r e n g t h of Fast C a r g o S h i p s by J . M c C a l l u m , B S c , F R I N A E s c a p e f r o m S u b m a r i n e s — A S h o r t H i s t o r i c a l R e v i e w of P o l i c y a n d E q u i p m e n t in t h e Royal Navy by H. d . T a b b , R C N C , F R I N A L a r g e T a n k e r s — W i n d C o e f f i c i e n t s a n d S p e e d L o s s D u e t o W i n d a n d S e a „ , n » r , • ^ , A by W . B. van B e r l e k o m , P. T r a g a r d h a n d A . D e l l h a g , M R I N A 11 16 20 10 14 15 19 22 23 27 28 30 36 31 32 33 34 35 19 41 1J o u r n a l o f t h e R o y a l I n s t i t u t i o n o f N a v a l A r c h i t e c t s
Published quarterly in January, July and October by the R I N A , 10 Upper Belgrave Street, L o n d o n S W 1 X 8 B Q . T e l e p h o n e : 01 235 4622/3 T e l e g r a m s : Sinai, L o n d o n .
P r i n t e d by UnwIn Brothers Limited Old W o k i n g , Surrey
E d i t o r : R. F. Burnett, BSc, M R I N A .
A p r i l ,
Cover illustration: Sideways launch of t h e 23 m Seiner/ Trawler 'Scotia' at the T h o r n e shipyard of Richard Dunston Ltd, in Yorkshire.
T h e I n s t i t u t i o n is not as a body, r e s p o n -sible for opinions expressed in ' T h e Naval A r c h i t e c t ' unless it is expressly stated that these are the C o u n c i l ' s views.
T h i s publication Is copyright. A l l rights reserved. T h e Editor will consider written r e q u e s t s t o reproduce articles and illustra-t i o n s appearing in illustra-t h e J o u r n a l . Mulillustra-tiple c o p y i n g o f t h e c o n t e n t s w i t h o u t permission is illegal. A d v e r t i s e m e n t D i r e c t o r : J o h n H. Baxter, RD Pearce Publications Ltd 1-3 Bank Street T o n b r i d g e Kent T N 9 1 B L A B C Audited circulation: January-December 1974 6 686 S U B S C R I P T I O N R A T E S : Single copy £3.50 ($8.50) One year £12.00 ($29.00)
Free t o members of the Institution. A P R I L 1975
THE NAVAL
ARCHITECT
A P R I L , 1975 N o . 2 C O W T E W T S iVIain A r t i c l e s t o S h i p y a r d D e s i g n C o m p o n e n t S t a t by G. S o u t h e Ferro C e m e n t C o n s t r u c t i o n : T o p i c s f o r R e s e a r c h by G . L. B o w e n a n d I. C. B a u g h S h i p S t r e n g t h as a P r o b l e m of S t r u c t u r a l D y n a m i c s by R. E. D. B i s h o p a n d W . G. P r i c e S h o r t e r A r t i c l e s H u l l r e s i s t a n c e p e r f o r m a n c e c o e f f i c i e n t s t h e t r i p l e t t e c h n i q u e , by E. P. L o v e r , R C N C , F R I N A A & P's s h i p y a r d r e c o n s t r u c t i o n s c h e m e u n d e r w a y at S u n d e r l a n d O p e r a t i n g e x p e r i e n c e w i t h t h e ' L i v e r p o o l B a y ' - c o n t a i n e r s h i p s V a r i a b l e g e o m e t r y s e l f - r i g h t i n g s a i l i n g m u l t i - h u l l s by P a u l W i n c h , M R I N A ' A k a d e m i k T u p o l e v ' — d r i v e - o n s h i p w i t h s o p h i s t i c a t e d r a m p s D i s t i n c t i v e - d o u b l e - e n d e d I t a l i a n f e r r i e s First g a s t u r b i n e p o w e r e d g a s c a r r i e r R e g u l a r F e a t u r e s R I N A P u b l i c a t i o n s 39 E d i t o r i a l C o m m e n t s 45 Q u a r t e r l y N e w s R e v i e w 46 E d u c a t i o n & R e s e a r c h 64 B o o k R e v i e w s 65 T e c h n i c a l M e e t i n g s 66 CEI N e w s 72 R I N A A F F A I R S F o r t h c o m i n g m e e t i n g s , n e w p a p e r s f o r w r i t t e n d i s c u s s i o n S u m m a r i e s of S p r i n g M e e t i n g s p a p e r s I n s t i t u t i o n a w a r d s a n d p r i z e s B r a n c h N e w s , P e r s o n a l N o t e s N e w H o n o r a r y V i c e - P r e s i d e n t , O b i t u a r i e s T E C H N I C A L P A P E R S ( w i t h d i s c u s s i o n a n d a u t h o r s ' r e p l i e s ) R e s i s t a n c e , P r o p u l s i o n a n d W a k e T e s t s w i t h H M S ' P e n e l o p e ' by J . S. C a n h a m R C N C , F R I N A T h e A c c e p t a b i l i t y of W e l d D e f e c t s by J . D. H a r r i s o n , P h D , a n d J . G . Y o u n g , B S c T r a n s p o r t C a p a c i t y a n d E c o n o m i c s of C o n t a i n e r S h i p s f r o m a P r o d u c t i o n T h e o r y P o i n t of V i e w by J o m a r K u v a sEditorial Index for 1974
50 53 61 40 49 56 57 58 59 60 67 68 69 70 71 61 95 107 i-iv 37
THE NAVAL
ARCHITECT
J U L Y , 1975 N o . 3 J o u r n a l o f t h e R o y a l I n s t i t u t i o n of N a v a l A r c h i t e c t s P u b l i s h e d quarterly in January, A p r i l , July and October by t h e R I N A ,10 Upper Belgrave Street, L o n d o n SW1X 8BQ. T e l e p h o n e : 01 235 4622/3 T e l e g r a m s : S i n a i , L o n d o n .
Printed by U n w i n Brothers Limited Old W o k i n g , Surrey
Editoi-: R. F. Burnett, BSc, M R I N A .
Cover illustration ; H M S ' A m a z o n ' , f i r s t of t h e Type 21 frigates built by V o s p e r T h o r n y c r o f t Ltd. T h e Type 21 design has attracted overseas interest. See our News Review.
T h e Institution is not as a body, r e s p o n -sible f o r opinions expressed in ' T h e Naval A r c h i t e c t ' unless it is expressly stated that t h e s e are t h e C o u n c i l ' s views.
T h i s publication is copyright. A l l rights reserved. The Editor will consider written r e q u e s t s t o r e p r o d u c e articles and Illustra-t i o n s appearing in Illustra-t h e J o u r n a l . MulIllustra-tiple c o p y i n g o f t h e c o n t e n t s w i t h o u t p e r m i s s i o n Is illegal. C O N T E N T S IVlain A r t i c l e s A b n o r m a l waves o f f t h e S o u t h A f r i c a n c o a s t — a d a n g e r t o s h i p p i n g by P r o f e s s o r J . K. M a l l o r y A c a s e of s e v e r e w a v e d a m a g e — ' B e n c r u a c h a n ' A n a l o g u e c o m p u t e r s a n d t h e s i m u l a t i o n of a r o l l i n g s h i p by R. N. A n d r e w , B S c S h i p s t r u c t u r a l a n a l y s i s in L l o y d ' s R e g i s t e r of S h i p p i n g O f f s h o r e d e s i g n : n e w f l o a t i n g a n d g r o u n d e d s t r u c t u r e s S p a n i s h s h i p y a r d t o s p e c i a l i s e in g a s c a r r i e r s S h o r t e r A r t i c l e s F i r e f i g h t i n g d i s c u s s e d by t h e R I N A S m a l l C r a f t G r o u p O n e h u n d r e d y e a r s o n — t h e Z e e l a n d S t e a m s h i p C o m p a n y First p r o d u c t i o n G R P l i f e b o a t f o r R N L I C o n f e r e n c e o n s t a b i l i t y of s h i p s a n d o c e a n v e h i c l e s R e g u l a r F e a t u r e s R I N A P u b l i c a t i o n s E d i t o r i a l C o m m e n t s Q u a r t e r l y N e w s R e v i e w 75 E d u c a t i o n & R e s e a r c h 99 79 T e c h n i c a l M e e t i n g s 100 80 B o o k R e v i e w s 101 R I N A A F F A I R S F o r t h c o m i n g m e e t i n g s A G M a n d R e p o r t of C o u n c i l f o r 1974 T h e N e w P r e s i d e n t — A d m i r a l S i r H o r a c e L a w A n n u a l D i n n e r , A p r i l 1975 P e r s o n a l N o t e s , O b i t u a r i e s 82 84 §7 89. 92 95 86 91 9S 87 103 104 106 107 108 A B C Audited circulation: January-December 1974 6 686 S U B S C R I P T I O N R A T E S : Single copy £3.00 Full year 1975 £12.00 1976: Six issues £18.00 ($48.00) Inc. postage Free to members o f t h e I n s t i t u t i o n . J U L Y 1975 T E C H N I C A L P A P E R S ( w i t h d i s c u s s i o n a n d a u t h o r s ' r e p l i e s ) W h i t h e r t h e L N G S h i p ? by W . d u B a r r y T h o m a s , B S c , F R I N A C h e m i c a l T a n k e r s — T h e Q u i e t E v o l u t i o n by T . R. F a r r e l l , M R I N A H a n d i c a p p i n g S y s t e m s f o r O c e a n R a c i n g Y a c h t s by P r o f e s s o r J . N. N e w m a n , M S c , S c D , F R I N A L i s t of C o u n c i l 195 N e w M e m b e r s 197 121 147 167 73
THE NAVAL
O C T O B E R , 1 9 7 5 N o . 4
J o u r n a l o f t h e R o y a l I n s t i t u t i o n
o f N a v a l A r c h i t e c t s
Published quarterly in January, July and October by the R I N A , 10 Upper Belgrave Street, L o n d o n S W 1 X 8 B Q . T e l e p h o n e : 01 235 4622/3 T e l e g r a m s : Sinai, L o n d o n .
P r i n t e d by UnwIn Brothers Limited O l d W o k i n g , Surrey
E d i t o r : R. F. Burnett, BSc, IVIRINA. A p r i l ,
Cover illuslration: A new/ 50 ft GRP pilot launch built by Halmatic Ltd for T h e Number Pilots Steam Cutter Co. See our News Review.
T h e Institution is not as a body, r e s p o n -sible for o p i n i o n s expressed in ' T h e Naval A r c h i t e c t ' unless it is expressly stated that these are the C o u n c i l ' s views. © 1975: T h e Royal Institution of Naval A r c h i t e c t s
T h i s publication is copyright under the Berne Convention and the international Copyright Convention. A l l rights reserved. A p a r t f r o m any relaxations permitted under national c o p y r i g h t laws, no part of t h i s publication may be reproduced, stored in a retrieval system or transmitted in any f o r m or by any means w i t h o u t the prior permission o f t h e copyright owners. Permission is not, however, required to copy abstracts of papers or of articles on c o n d i t i o n that a full reference t o the source is s h o w n , ivluitipie copying of ttie contents of ttie publications without permis-sion is always illegal.
A B C Audited circulation: January-December 1974 6 686 S U B S C R I P T I O N R A T E S : Single copy £3.00 1976: Six issues £18.00 ($48.00) Inc. postage
Free to members of the Institution. O C T O B E R 1975 C O N T E N T S M a i n A r t i c l e s T l i e b u s i n e s s of l a y i n g up s h i p s a r e v i e w by t h e E d i t o r 119 W a k e a n d f o r m f o r h i g h s p e e d t w i n s c r e w s h i p s by D. K. B r o w n , M . E n g , R C N C , F R I N A 122 T h e p r o g r a m m i n g of s t a n d a r d s e r i e s c a l c u l a t i o n s — S e r i e s 60 by P. M. F. M . D e S o u z a , B S c , a n d R. M. C a m e r o n , B S c , M R I N A 125 S u b m a r i n e r e f i t t i n g in A u s t r a l i a — a n e w s l a v e d o c k f r o m an A u s t r a l i a n B r a n c h p a p e r by J . C. J e r e m y , BE, M R I N A 127 D e s i g n a n d c o n s t r u c t i o n o f t h e ' V i k i n g P i p e r ' by C. J . G l a d i s h , B S c , M R I N A • 132 S h o r t e r A r t i c l e s T h e t r a d i n g o u t l o o k f o r very l a r g e t a n k e r s . S m a l l e r d e s i g n s d o m i n a t e t h e 1975 A d m i r a l ' s C u p R o - r o c o n v e r s i o n f o r B r i t i s h Rail f e r r y S e r i e s of m i n i - b u l k e r s f o r N o r t h S e a t r a d e s O f f s h o r e d e s i g n : p l a t f o r m s , d r i l l i n g s h i p c o n v e r s i o n , p i p e l a y i n g b a r g e , heavy l i f t s h i p s R e g u l a r F e a t u r e s R I N A P u b l i c a t i o n s 111 R e s e a r c h 135 E d i t o r i a l C o m m e n t s 115 B o o k R e v i e w s 136 Q u a r t e r l y N e w s R e v i e w 116 CEI N e w s 137 L e t t e r s 134 T e c h n i c a l M e e t i n g s 138 R I N A A F F A I R S F o r t h c o m i n g m e e t i n g s , n e w p a p e r s f o r w r i t t e n d i s c u s s i o n L a t e s t m e m b e r s h i p f i g u r e s , A u s t r a l i a n a n d j o i n t m e e t i n g s B r a n c h N e w s P e r s o n a l n o t e s , l i b r a r y T E C H N I C A L P A P E R S ( w i t h d i s c u s s i o n a n d a u t h o r s ' r e p l i e s ) R N L I L i f e b o a t s in t h e 1970s by S. M a c d o n a l d , B S c , F R I N A , C. M. M a g i l l , M R I N A , H. E. O v e r , A . W a t s o n a n d S. E. W e l f o r d , M R I N A C o m p r e s s i v e S t r e n g t h of W e l d e d S t e e l S h i p G r i l l a g e s by C. S. S m i t h , B S c , P h D , F R I N A 118 124 126 129 130 140 141 142 143 301 325 109
