Tapered or Untapered?

The whole aim of the sailmaker’s 'art' is to develop lift to drive the boat through the water.


The sail is like an aircraft’s wing and is designed to develop as much lift with as little drag as possible.


And how many wings have you seen with a 50% wing shape?


Modern sails are designed and made with their position of maximum camber at between 38% and 45%.


So your sailbattens need to complement that design shape - not fight it.

So why use Untapered battens?

Except for special cases like top battens on some cats and dinghies, there is no good reason!

Untapered Fullbattens distort sail shape by giving too fine entry, moving the draft or designed shape too far aft, and giving a rounded leech in strong wind.


They give high lift (in the sideways direction) and high drag.


If your rig is not accelerating in gusts but just developing heeling moment then your battens could be the problem.


Untapered battens also lower the life span of your sail by working against the sailmakers designed shape.


Batten ‘Stiffness’

A battens ‘Stiffness’ or ‘Compression’ is simply the force, in kg or pounds, that is required to bend it to a certain point.


That certain point is where any increased bending of the batten gives very little change to the kg or pound reading of the scale.


At FIBERFOAM we have up-to-date compressions for many classes and boats.


Measure Compression in Kgs or lbs
Measure Compression in Kgs or lbs

Not sure which Battens ?

f you are in doubt about which battens are best for your sail, ask us about our specific class recommendation.


Or send us your class name plus batten lengths.

Custom made Battens ?

If you need something special, send us:


  • * Batten lengths
  • * Batten compression (in kg or pounds)
  • * Batten width (Optional)
  • * Position of maximum camber (Optional)


With this information we can manufacture almost any batten you could need.


Contact us for a Quote.


Fiberfoam Produkt-Broschuere.pdf
Adobe Acrobat Document 1.4 MB

2017 A Class Worlds


The 2017 A Class Worlds in Sopot , Poland provided a range of conditions from light 5-8 knots , up to 20 knots and difficult waves.

But the majority of races were in the lighter range up to 10 knots and with large wind shifts and areas of more or less breeze , the sailors had to be fast , aware , and good at choosing when to foil or not to foil.


Those who were good at that often made up 20 or more boats in a single downwind , with other unfortunates loosing similarly.


The local sailors showed their skill and local knowledge and their results reflected that , with young sailors Tymek Bendyk 2nd  and 3rd Jakub Surowiec.


Kiwi sailor Dave Shaw – 4th - sailed very well and having spent a couple of months in Sopot training for the worlds , showed good speed and boat handling .


Manuel Calavia was unlucky to be OSC one race , costing him a chance of a podium place.


But Steve Brewin was the standout – he sailed smart , got out of trouble well and deserved his victory.


I know from first hand observation that he put a huge amount of time and energy into his campaign and this title was well deserved. Darren Bundock (5th) was his training partner and except for a few nasty shifts would have also pushed Steve at the top.

In terms of material , below a list of top ten, all were foilers:


1st        Steve Brewin              Exploder 2017/Brewin sail/Fiberfoam#15 mast


2nd       Tymek Bendyk           Exploder 2017/Bryt sail/Fiberfoam#15 mast


3rd        Jakub Surowiec          Exploder 2017/Bryt sail/Fiberfoam#15 mast


4th        Dave Shaw                  Exploder 2017/Brewin sail/Fiberfoam#15 mast


5th        Darren Bundock         Exploder 2017/Brewin sail/Fiberfoam#15 mast


6th        Jacek Noetzel             Exploder 2017/Bryt sail/Fiberfoam#15 mast


7th        Maciej Zarnowski      Exploder 2017/Bryt sail/Fiberfoam#15 mast


8th        Bruce Mahoney          Exploder 2017/Brewin sail/Fiberfoam#15 mast


9th        Mischa Heemskerk     DNA F1/Mischa sail/Fiberfoam Tapered 6.5 mast


10th      Manuel Calavia          Exploder 2017/Ashby North sail/Fiberfoam Tapered 6.5 mast





All top 10 except Heemskerk used exclusively Fiberfoam Sailbattens


There was some experimenting with shorter rigs (8310mm vs std 9035mm) but in the end it was the more refined 9m rigs that dominated , filling all top ten positions.


First Classic boat was Swedens Pontus Johnsson in 25th place who sailed consistently well.


Of importance to the Class was the yes vote to have two stand-alone classes .


That is , starting with 2018 Worlds there will be a ‘Classic’ A Class as well as the ‘Open’ A Class .


This is the result of the Class listening to its sailors worldwide , many of whom expressed a desire to remain non-foiling.


The Classic A Class will be straight or curved foils, with each sailor signing a code that their boat will have at least one hull in the water in the course of normal sailing.


I think this is great for the Class , encompassing a large number of sailors , many of whom do not have the time to master foiling or keep up with foiling developments , plus who simply enjoy classic sailing.


I see the class getting even stronger , from its already robust position in the sailing world.