Recent Sailing News:

Ullman Sails T-Shirt Night
Wed, 20th Jun 2018
It was a great night out sailing Ullman Sails T-Shirt Night during the CRA Beer Can Series.  Thank you all that participated.  Do not forget about Ullman Sails CRA Halloween Regatta in Oc
T-Shirt Wednesday
Thu, 31st May 2018
Wednesday June 20th is Ullman Sails night at the CRA Beer Can Series.  The Ullman Sails Team members will be out photographing and the pictures will be posted here immediately after the r
Seattle POD Regatta
Thu, 26th May 2016
May 21-22 2016 The Second Annual POD Regatta (Puget Sound One Design) was a great success with 54 boats over 8 classes.  Winds were 5-10 on Saturday with some large shifts coming thr
Oregon Offshore 2016
Tue, 17th May 2016
The 2016 Oregon Offshore from Astoria Oregon to Victoria BC is an annual event that has seen some growth in the last few years.  This year it was a great event with wind from the start and lot
Rodrigo Cuellar Dipp to Manage Ullman Sails PV
Fri, 13th May 2016
Ullman Sails excitedly announces the opening of Ullman Sails Puerto Vallarta.  The full service loft on Mexico’s west coast offers new sails, canvas and sail service to the local sailing

Plastic Spinnakers

Plastic Fantastic, low stretch more power

Tue, 26th Jul 2011
By Chuck Skewes

Plastic Spinnakers Plastic Fantastic, low stretch more power

Recently Ullman Sails got a unique chance to test offshore spinnakers styles in the recent Transpac race.  Alchemy the Andrews 70 had a new “Plastic” A4 Spinnaker.  Made from Dimension Polyant  CZ material, designed for 21-30 knots of wind.  This new spinnaker was designed to induce surfing and to allow the boat to punch through the back side of waves more efficiently. 

Late in the race Alchemy was joined by another 70’ with 600 miles to go. The two boats were 1.5 miles apart with wind conditions 14-18 knots and both boats were in the middle of the A2 range.  The sailing between the two boats remained even for 500 miles until the wind reached 22 knots.  Alchemy put up their “Plastic” A4 and in the next 8 hours put 7.5 miles on the other 70.  It was clearly a knot faster on average.  The sheet loads were distinctly heavier.  The trimmers had to add a wrap on the winch drums and the grinders could no longer use first gear.  Compared to the A2 in the same wind, the loads transferred to the boat were double.  This allowed the boat to make it through the back side of waves and to start surfing earlier.  Since the sail has virtually no stretch it did not act like a shock absorber when puffs came on.  You can feel the difference in the boat and it all translated to speed.
Nylon spinnakers are still the spinnaker of choice in the lower wind ranges since you want some shock absorption to keep the sail from bouncing and disturbing the air flow.  Once the sail is completely pressured up the stretch or shock absorption is less than desirable.  Especially on the bigger boats.  Ullman Sails has been working with several boat on the A4 and A3 spinnakers made from CZ and it has shown very successful with a 1st and 3rd place in Transpac.

This article was posted on Tue, 26th Jul 2011