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

2014 A Class Worlds - Takapuna New Zealand


Excellent range of conditions from light,medium and strong winds and quite flat water. The wind was challenging with shifts of up to 20° at times and areas of more or less wind strength.

Really it was a case of two fleets - the 'Foilers' and the rest.

The Foilers were using J type centreboards , the rest normal C type curved boards.

From the top 10 , Foilers finished 1,2,3,5,6

A breakdown on gear used was:

1st , 2nd , 3rd ,5th DNA / J Foils / Ashby sail / Fiberfoam #14 Mast

4th Exploder / C Foils / Landenberger / Fiberfoam #14

7th , 8th Exploder / C Foils / Ashby / Fiberfoam #14

9th DNA / C Foils / Brewin / Fiberfoam #14

10th Nikita / C Foils / Brewin / Fiberfoam #14


Results 1 Glenn Ashby (AUS),2 Blair Tuke (NZ) , 3 Peter Burling (NZ) , 4 Andrew Landenberger (AUS) , 5 Ray Davies (NZ) , 6 Nathan Outteridge (AUS) , 7 Scott Anderson (AUS) , 8 Brad Collett (AUS) , 9 Adam Beattie (AUS) , 10 Steve Brewin (AUS)