Racing symmetric and asymmetric spinnakers

OneSails Racing 左右対照及び非対称スピンネーカー

近年非常に重要な進化を遂げているセールは、スピンネーカーです。進化した素材の使用と、セール作成技術により、スピンネーカーはランニングは勿論、AWA45°までのリーチングにおいて非常に重要になりました。ワンデザイン艇での豊富な経験から、艇速はスピンネーカの大きさは勿論、その形状が非常に重要な要素となる事が分かっています。これはデッドランで走る際から、上し目で走る際まで、全ての走らせ方で重要になってきます。OneSailsでは様々な種類の、高性能なレース艇用スピンネーカーを作成しています。

セールは御注文ごとに一枚一枚設計されており、それぞれの艇にとって最も効率的となるデザインになっています。また弊社では、より良いセールとなる用、オーナー様とデザインのご相談をさせて頂いています。アメリカズカップや小型のワンデザイン艇まで、様々な艇のセールを作ってきたOneSailsの経験を活かし、最適なアドバイスをお約束します。さらに、我々はお客様が新しいセールの性能を、より簡単に引き出せるような助言もさせて頂きます。下にあるセール選択ガイドは、どのような時にどのセールを選択すれば良いかの、目安となります。

SAIL VIEWER
RACING SYMMETRIC SPINNAKERSRACING ASYMMETRIC SPINNAKERS
RCR
VMG
RUN
AP
SPI/HVY
A0/AF0
A1/AF1
A2/AF2
A3/AF3
A4/AF4
A5/AF5

OneSails presents the IFS™ (Integrated Furling System), a new style of headsail and downwind sail construction which uses continuous fibre technology to create sails which can be furled without the use of a heavy and expensive anti-torsion cable.

IFS™ sails are designed to incorporate a net of continuous structural fibres, laid directly on to the sail’s luff, effectively replacing the cable. The advantages of this technology are considerable. A wider range of sail shapes can be set and furled with sail handling eased by the reduction in weight.

  1. Improved aerodynamic performance.
  2. Structure integrated within the sail which allows furling without an anti-torsion cable.
  3. Lower halyard tension by 35% when compared to a traditional sail with cable.
  4. Without a cable the sail’s luff can be designed to project forward and to windward, improving performance at wider angles.
  5. Easy to handle because the furled sail is light and can easily be folded to fit in its bag.
  6. Stable leech profile even if measured as a gennaker according to ORC and IRC rules.
  7. Lighter sail (without anti-torsion cable).
  8. Bespoke finishing and accessories.

Power-reaching has always been a highlight of offshore racing but more sailors are now also looking beyond those up and down inshore courses

There is nothing more exhilarating in offshore sailing than power- reaching – the point of sail we dream about that makes the other legs of a tough race worth the pain... High speeds, spray and that visceral thrill we get knowing a boat is being pushed to its limits as the miles are speedily devoured. A drawback on this point of sail, however, is the heeling and imbalance that can happen when there’s either too much force on the sailplan from the masthead Code 0 (MH0) or even the fractional Code 0 (FR0), resulting in costly sometimes brutal course deviations to hold on to these sails. Yet the speed and power are hard to give up, even with the extra miles covered – while constantly recalculating the VMG trade-offs against a lower heading.

Often the only way to stay high enough to stay on course is to reduce the power and heeling moment by dousing the larger sails and shifting down to smaller headsails. But then there is a significant loss of power and speed, with more of the mainsail needed to maintain drive force. Using more main means shifting the load balance aft, which in turn results in more helm pressure to stay on track. The more main used, the more weather helm needed, and the greater the rudder angle which creates drag, inhibiting speed further.

The result is often a ‘void’ for the otherwise well-equipped offshore racer where the sail inventory is simply not optimised to get the best speed at the desired angle. The latest-generation ocean greyhounds chasing course records know this and have been designed with their masts well aft, creating enormous foretriangles in which to fly multiple combinations of headsails and staysails, often mounted on furlers for easy deployment.

Not all of us have the luxury of reconfiguring the entire boat – mast position, sailplan and appendages – just to accommodate a larger foretriangle and remain competitive in other sailing modes. But we can find speed in reducing heel while retaining power in the sailplan.

OneSails has been working hard on this problem. Paul Eldrid of OneSails in Perth is gearing up for the Austral summer season, and examining how to power up a variety of fast designs ranging from a Bakewell-White 36 to a HH42, DK 46, Carkeek 47 and several TP52s. All show benefits from new reaching headsail designs from OneSails. When given the space to operate efficiently, flying multiple headsails will not only provide more power to better balance out a fully trimmed mainsail, and reduce drag from the rudder, it will also stabilise the flow across the whole sailplan.

‘Fortunately there are no restrictions in IRC and very generous headsail allowances in ORCi that allow for development of these sails to fit an important niche for the passage racer,’ says Eldrid. ‘We have made several discoveries in this process that we think will really re-energise these boats in reaching conditions.’

Rather than the traditional arrangement of tacking a reaching headsail at the bow and then trying to fit in a genoa staysail somewhere on the foredeck, Eldrid has been experimenting with putting the larger headsail out on the end of the bowsprit (called the J0), giving plenty of room to fit another headsail aft of this, such as the new square-top jib staysail (the JS).

Many of us are used to course racing, where headsails all carry battens... this is not necessary with these reaching sails since the depth is further aft and leeches do not need to be straight, in fact they should twist for optimal flow. With no battens, furlers then become a strong option for more boats.

Optimal combinations of the headsails, reaching spinnakers and a reefed or full-hoist main are many and varied. Mindful of cost, OneSails is now developing ‘turbo-charged multiple headsail solutions’ that still use the niches of the MH0 and FR0 but now supplement them with new sails including the J0 and JS.

Up until now OneSails has been building these sails in panelled construction as they test mould shapes at full scale. However, the company’s design and R&D teams are also conducting a fuller Fluid Structure Interaction (FSI) study to provide the data to start using its continuous yarns one-piece 4T FORTE composite membranes to optimise for strength and weight.

‘Already we’re seeing a strong interest in bringing back the fun and thrill of more efficient reaching on all courses,’ says Eldrid. ‘This is an exciting new development path.’

Why choose OneSails

1. 他の追従を許さない、最高の技術
インショア、オフショア艇を問わず、デザ インチームは過去10数年間、他社には無い 最高級のワンピース、コンティニュアス セールを開発し製造して参りました

2. パフォーマンス
重量、シェイプコントロールやデフォメー ションに対する抵抗力等の各種性能におい て、従来のパネルセールを凌駕する性能と 耐久性を有しています

3. 品質
M3™ や4T FORTE™メンブレンは、最高 の技術と品質をお約束するため、ミラノに ある専用工場にて製作されます。これによ り、厳しい社内基準をクリアしたもののみ が、皆様にお届けされます。

4. デザイン
最速のセールシェイプは、長年に渡る経験 と分析から生み出されます。OneSailsは セールシェイプを最適化する研究開発に長 年に渡り力を注ぎ、現在セールメイキング 産業において最前線を走っています。この アプローチが成功であった事は、弊社のお 客様が国際大会や世界選手権等、数々の大 会で獲得されたトロフィーや表彰状の数が 物語っています。

5. サービス
弊社の各ロフトで重視している活動の1つ は、お客様へ最高のサポートやアシストを する事です。そしてこのサービスをお約束 するために、各ロフトには専門のセーリン グチームが在籍しております。お気軽にご 相談下さい

OneSails Sails Repair