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Southern Spars - North Technology

Elvstrøm Sails new APR-1 makes sail reefing history!

by Liz Rushall on 2 Apr 2014
Elvstrom Sails APR1 sail scientists Jeremy White
Elvstrøm Sails technology team have invented the world’s first fully wind ‘reactive membrane’, creating sails that never require reefing.

Developed from extensive research by Elvstrøm’s design team, the revolutionary APR-1 Film contains a honeycomb weave of micro-pores. Under the loads of increasing wind pressure, the micro-pores automatically open up, exhausting excess wind through the sail. This depowers the sail, and also causes acceleration on the leeward side of the sail, providing enhanced speed, lift and performance.

The APR-1 film is designed to be integrated into all Elvstrøm’s sail fabrics and non-delaminating membranes. Each sail is run through a DST trial, a bespoke ‘displacement stress programme’, in order to configure the exact wind strength and polars when the micro-pore exhaust system should react, to ensure maximum power is maintained in light to medium conditions.

For cruising sailors, or offshore racers, there’s no more climbing out of the cock-pit in lively conditions to reef. Plus, it means a de-cluttered cock-pit and reduced weight as reef systems and lines can be discarded. And for the racing enthusiasts clean, aerodynamic sails without the addition of reef patches.

Jeremy White, loft manager for Elvstrøm Sails UK says, 'We are really excited about the launch of the APR-1 technology, which we believe opens up sailing in a much wider range of conditions for many of our customers. We are looking forwards to hearing our customers Elvstrom Sails
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