Geoff McCoy Fins - design through development

Gull Wing and other long tip short base fin designs. The concept is to get the drive factor down in the water not at the base of the fin but in the tip area.

This enables the plan shape of the fin to remain narrow over all but still retaining good area in the tip.

There are many advantages in using these designs by reducing base area it allows the fin to turn quicker because the area has been reduced it also takes the need for the board to run longer arcs allowing quicker shorter turns, so by moving the base area of the fin up into the tip area by extending the length of the tip of the fin you get the length and area to drive off with greater affect as it is deeper in the water giving the pendulum effect while still retaining the narrow plan shape which gives less drag, especially in hollow waves as there is less effect on the narrower plan shape as the water spirals around your board in the hollower more critical parts of the wave with great intensity, because of this the board can surf deeper in tubes while still allowing the surfer to be in control the board.

McCoy Single Fin Designs

Geoff McCoy Fins - design through development

Single fins

100% Gull Wing (Original Design)

This Fin has the same design features and Performance Characteristics as the 110% Original Fin. This version is for Narrower Tail Boards under 15” wide and can also be used as a Center Fin for a 2 plus 1 configuration. Especially on Long Boards or Guns. Find these in our catalogue

100 Gull Wing original 

110% Gull Wing Original

I have been using these Fins since 1991 and they are Well Tested in a Wide Range of Wave Sizes and Conditions around the World. This Fins Function is to Provide more Drive and Hold while giving the Ability to be Easy to go from Rail to Rail as well as 
All Round Turning Ability. This Fin’s Design is Narrower in the Plan Shape than the Traditional Dolphin Fin Design, which have a Wider Base and Narrower Tip Area.
By Narrowing the Base and putting it into the Top of the Fin, it provides a more Efficient Drive and Hold Function, because the Area of the Fin is Deeper in the Water.
The Forward Knuckle in the Plan Shape Utilises the Waves Motion (drawing up and over).
This Function Pulls the Board Against the Face of the Wave, which Gives it the Hold and Drive.

Find these in our catalogue

110 Gull Wing original

110% Straight Tip

This More Upright Design is Quick and Pivoty; less Drive but Elevates very Quickly and is Good for Short Arc Surfing. Performs Best when you are Surfing the Face of the Wave. Find these in our catalogue

110 Straight tip

110% Extended Tip

Same Function as the Original but the Extra Length in the Tip provides Longer More Powerful Drive and Hold. It’s Good for Powerful, Flowing, Down the Line Long Arc Surfing. Find these in our catalogue

110 Extended tip

McCoy #5 Traditional Dolphin Style

I Modified the Original Fin by Reducing the Plan Shape to Allow the Fin to React Quicker from Rail to Rail, while Still Providing Drive and Flow with Good Hold. I Originally used it in the Early Lazer Zaps, where it did the Job. 
For Those who want to use the Traditional Dolphin Fin, My Modified Fin Design will give you a Higher Performance.

Find these in our catalogue

traditional dolphin fin

The Moob

This Design works Especially Well in Larger Down the Line Waves; when you need to Stay High on the Wall and Retain Good Speed, as it Provides Great Hold and Flow, Excellent for Tube Riding.
The Narrow Plan Shape, with the Base Moved to the Tip of the Fin, Provides More Drive as the Area is Deeper into the Water, where it Gives More Efficient Thrust.
The Narrow Plan Shape also Allows the Board to Go from Rail to Rail, making it Easy to Turn.
This Design has been Tested over Many Years by my Test Pilot Alastair McDiarmid in a Very Wide Range of Wave Sizes and Conditions, in Australia, Hawaii, Indo and the South Pacific Islands.

Find these in our catalogue

moob

McCoy Gull Wing Fins Explained

McCoy Gull Wing Fins

After years of research and development McCoy is now proud to be releasing our new range of superior fin designs.

Tested in all wave sizes and conditions with out standing results, It is now possible to obtain 3 different style of surfing.

Single Fin Placement

THESE RECOMMENDATIONS ONLY APPLY TO GEOFF McCOY DESIGNED AND SHAPED SURFBOARDS AND FIN DESIGNS

There is an increasing interest in the single fin design once again, which brings with it lack of knowledge on their overall performance and capabilities.

With all my single fin designs, I include a 10” box which allows removal of fin from the box and movement laterally when fin is in the box.

Having these capabilities gives the board a greater range of performance options.

This is my recommended starting position for my 3 Gull Wing design fins.

Start out by placing the back of the base of the fin 7 1/4” or 18.50cm from the back of the board (tail)

Depending on the feeling with the fin in that position, you may need to move the fin forward or back in 1/2” or 10mm gradients to achieve the feeling you want

By moving fin forward
It will decrease drive and increase the manoeuvrability
By moving fin back
It will increase drive and stiffen manoeuvrability

Gull Wing Single Fin Position in Box

fin placement2

If riding the board in waves over 5’, it may be necessary to push the fin back even as far as the back of the box, this gives the board better hold, drive and control in the larger waves.

McCoy Fins

Gull Wing and other long tip short base fin designs.
Concept to get the drive factor down in the water not at the base of the fin but in the tip area.

This enables the plan shape of the fin to remain narrow over all but still retaining good area in the tip.

There are many advantages in using these designs by reducing base area it allows the fin to turn quicker because the area has been reduced it also takes the need for the board to run longer arcs allowing quicker shorter turns, so by moving the base area of the fin up into the tip area by extending the length of the tip of the fin you get the length and area to drive off with greater affect as it is deeper in the water giving the pendulum effect while still retaining the narrow plan shape which gives less drag, especially in hollow waves as there is less effect on the narrower plan shape as the water spirals around your board in the hollower more critical parts of the wave with great intensity, because of this the board can surf deeper in tubes while still allowing the surfer to be in control the board.

McCoy Ben Lexcen Fin Disclaimer

This statement is to inform people that the Ben Lexon designed keel fin is in no way my fin of choice. I do not recommend it to be used in any of my Geoff McCoy designed surfboards.

Never have I had any involvement with the design and I certainly have not and do not recommend its use in a surfboard.

The original Lazor Zap fin is a refined Dolphin fin design. In recent years I have developed and recommend my Gull Wing fin.

My Gull Wing has been designed specifically for my wide thick tail single fin boards and has proven itself to be extremely efficient and a very reliable performer in a wide range of wave sizes and conditions.


fin1The Gull Wing Straight Tip
This fin is very user friendly, good hold with smooth flowing arcs, good for more vertical surfing.
 

 

fin2
The Gull Wing Original
This fin gives amazing holding and driving capabilities; the forward knuckle at the front gives extra hold and drive.
     

 

fin3
The Gull Wing Extended Tip
This is great for long arc surfing smooth and flowing with amazing hold and control in the roundhouse cut backs.
     
McCoy Clip In Fins Design

McCoy Clip In Multi Fins

Geoff has Designed All of the Fins for his Boards. His Boards perform at their Best when Combined with His Fins. The Fins are Larger to Facilitate the Wide Tail on the Nugget Range of Boards.

You can find these fins in our catalogue

McCoy #1 Traditional Dolphin Style 3 Fin FUTURES Box Compatible BASE

This Fin is Bigger than most Multi Fin Designs. With my Thicker, Wider Tail Designs it is Necessary  to have Good Hold and Drive, as the Softer Hull Shape of my Designs Require the Larger Fin to Provide the Necessary Hold and Drive to Accommodate the Increased Volume in the back Half of the Design. This Fin is a Reliable All Round Performer and has been Proven and Tested in My Boards, World Wide in All Conditions. Find these in our catalogue

 Clip Fins2

McCoy Mini Gull Wing 3 Fin FUTURES Box Compatible BASE

This design is Super Efficient and therefore Reduced in Size when Compared with My Traditional Dolphin Style Fin. This design will Function Very well in  a Range of Surfboard Designs and with Less Fin Area is Very Easy to Maneuver while giving Superior Hold and Drive, compared to Dolphin and other Fin Designs.

Find these in our catalogue

McCoyMiniGullWingFuturesBaseThrusters clip in fins

McCoy #1 Traditional Dolphin Style 3 Fin FCS Box Compatible BASE

This Fin is Bigger than most Multi Fin Designs. With my Thicker, Wider Tail Designs it is Necessary  to have Good Hold and Drive, as the Softer Hull Shape of my Designs Require the Larger Fin to Provide the Necessary Hold and Drive to Accommodate the Increased Volume in the back Half of the Design. This Fin is a Reliable All Round Performer and has been Proven and Tested in My Boards, World Wide in All Conditions. Find these in our catalogue

 Clip Fins

 

 

Travel Fin

Travel For Glassed On Fins

There is no denying removable fins are convenient for travel, but that is all.

As far as design and strength are concerned removable plastic fins are just not up to the task, consistantly breaking and too weak to withstand the extra pressure that a wide thick tail produces.

For this reason all my multi fin designs have hand made fibreglass fins glassed onto the board for strength and performance as opposed to a fashion statement that is inadequate for the job.

When travelling with glassed on fins, it is necessary to take precaution for protection.
Suggestion

Get a piece of sponge foam rubber 1" thicker than the depth of the fins, cut it out slightly larger than the fin area and the board. Hold it over the fins and mark these positions then dig out the holes for the fins to fit into. Push the foam over the fins, put board into travel bag and zip it up.

By doing this, you will minimise breakage by rough luggage handlers.

travel fins

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