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the catalogue #318 
1970      McCoy     Twin fin I              5 ft 7"
#318 
MANUFACTURE
MANUFACTURER: McCoy Surfboards, Brookvale, Sydney NSW
SHAPER: Unknown
DESIGN: Twin fin I 
DESIGNER:  : Mike Eaton / Rolf Arness / Corky Carroll / David Nuuihwa, all USA 
SPECIFICATIONS
CONSTRUCTION
Foam blank with 1/8'' plywood stringer, Volan glassed  with 1'' rail lap and rounded tail/deck patch, fin patches. Post production plastic conjute sail base?
DIMENSIONS
Length:
5
feet
7
inches
 L2 : 5 feet 6''
 
Width: 
 21
inches  
Wide Point: 
+ve 0 
inches
Nose :
17
inches  
Tail:
16 /2
inches
Thickness:
3 1/2
inches  
Pod:
10 x 1
inche
Weight
  kilos  
Volume:
  litres
Nose/L: 
  inches  
Tail/L:
  inches
Other:
  inches        
FEATURES
Nose: semi pin 
Tail:  chamfered rounded square tail 
Deck:   S deck, thickness at rear third
Bottom: flat
Rails: 50/50 in nose, soft low in centre, hard at pod
Rocker: flat with nose lift
FINS
Twin - black laminate
5 1/2" x 3 1/2" base x 7'' span @ 5''., 
Tipped, Toed, note standard symmetric foil 
- not asymmetric.
Extensive fin base repairs with cloth and body filler.
DECOR
DECALS
Deck:  McCoy - Orange/black at sweet spot
Bottom:  McCoy - Orange/black at sweet spot
MARKINGS
Deck:
Bottom:
COLOUR
Deck: clear
Bottom: clear
#7i
NOTES
BOARD HISTORY
Dimensions and photographs at Surf's Up At Gerringong Board Display, August 2005.
Thanks to Scott Andrews
DESIGN HISTORY
A Brief History of the Twin Fin
Twin Fin 1
The US design (Corky Carroll, Mike Eaton , Rolf Aurness and David Nuuhiwa) was directly imported by Tom Hoyle to Bennett Surfboards, Brookvale in late 1970. 
Concurrently, Terry Fitzgerald and Greg Hodges "built two five-sixes" from design details culled from negotiations between Shane Surfboards and Corky Carroll, post Johanna World Contest, 1970 (M.3)
The design quickly dominated 50% of the Sydney market, notably by McCoy Surfboards.
Usually sub 6 ft x 20" with 10" diamond pod. Glue line stringer. 
Fin size, shape and placement varied.
REFERENCES
Other Twin fin 1's :
# 71 Walsh 5 ft 4''
# 106   Pat Morgan
#134  Farrelly  6 ft 1" 
#161 Hansen 6 ft 1''
Noted July 2005 : 
5 ft 6'' McCoy Twin Fin, 1971 :
Fin Specifications - 5 1/4'' x 3 1/2'' base x 6'' span @ 5''.
Toed in but not tipped out. Symmetric foil.
 

Twin fin II's
# 40
Other McCoy Surfboards
#25 McCoy, Rounded Pin 6 ft 6"  1976
#210 McCoy - Reno Aberellia Design, 7 ft 2''
#112 McCoy Lazor Zap 5"8" 1980
#167 McCoy Nugget 6 ft 11 1/2'' 2000
#316 McCoy Nugget 7 ft 7 1/4'' Shaped by Geoff McCoy 2001

Mark Warren and McCoy Twin Fin 1, 1971.
Photograph : Uncredited
Originally printed in Tracks magazine, 1971.
Nat's History, page ?

Mark Warren and McCoy Twin Fin 1, Narrabeen, 1971
Photograph : Uncredited
Surfing World magazine, April 1979. 
 Volume 27 Number 6  page 34.

Originally printed in Surfing World magazine, 1971.



Books:
1.Nat's History 0f Surfing    page 106.
Magazines.
Articles:
1. Tracks Magazine  Number 2 Summer 1970? 
Twin fin articles featuring Tom Hoye at Bennett Surfboards and Terry Fitgerald at Shane Surfboards. Photographs from these articles reproduced in Nat Young's History of Surfing, page 106. See 1 above. Inexplicably these articles did not appear in The Best of Tracks (Volume 1) design section.
2. Mick Mock : "The Summer Millionaire (Shane Steadman)" 
in Deep magazine, Vol 4 #4 Winter 1999 pages 50 - 61 
- includes photographs
3.  Phil Jarrett : "The Sultan of Speed" (Retrospective 1960 - 1999) 
in The Australian Surfers Journal Vol 1 # 2 Autumn 1999 page 28 - 45. 
Twin fin I page 42
4. Surfing World Magazine  Vol 14 # 6
- cover shot of Terry Fitzgerald (Shane Surfboards), Mark Warren (McCoy Surfboards) and tails/fins.
Film:
1.  John Severson : Pacific Vibrations USA 1971
- footage of Corky Carroll, Twin fin I/Hobie Surfboards
2.  Bob Evans : Family Free 1971
- Col Smith and Mark Warren ride Twin fin I/McCoy Surfboards
CONDITION: 5.


   Fins and Chamfered pod in cross section

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