As part of our August Zoom meeting Skip Johnson gave us a short summary of his proa building and sailingRead more
For this meeting we will have a discussion about the recent evolution of the America’s Cup. John Perry will introduceRead more
Our ISP have upgraded our server; you now need to use TLS1.2 if you have it. NOTE: Windows7 computers doRead more
As you may guess, at this point in time, AYRS is postponing or cancelling all activities that may bring groups of people together. We are reviewing this on a month by month basis.
The SW UK Area meeting is therefore cancelled (but see below), and the Norfolk sailing meeting (Broad Horizons 2020) is postponed at least until mid-late June.
It is possible that some meetings may be replaced by online video conferences (by Skype or similar). For further details please see the Forum where these things will be announced.Read more
In the Forum at https://www.ayrs.org/phpbb/viewforum.php?f=37 If you’re not already registered on the Forum you will need to register and beRead more
This project has been undertaken with the aim of finding a method by which the length of a surfski kayak can be optimised in terms or having least possible resistance. Surf ski kayaking is a highly competitive international discipline that takes place on open ocean, it differs from other forms of kayaking because of the lack of regulations regarding the length of the boats. An aim of this work was to determine if the boats on the market today are fully optimised in terms of having a length with least resistance. Through use of software that incorporates thin ship theory as well as skin friction data from ITTC ’57 it was possible to calculate the wave making and frictional resistances for a series of lengths of Wigley hull forms with constant displacement and beam. This allowed a total resistance to be calculated for each length which in turn leads to an apparent ‘optimum’ length. In terms of boats currently available, it appears from the results that they have indeed been optimised effectively however only for a small weight range of user. A conclusion of this work is that there may well be scope for manufacturers to produce boats better suited for other weight ranges of kayaker or paddler as they are more often known.Read more
In the Forum at https://www.ayrs.org/phpbb/viewtopic.php?f=37&p=2559 If you’re not already registered on the Forum you will need to register and beRead more
In the Forum at https://www.ayrs.org/phpbb/viewtopic.php?f=37&p=2727#p2727 If you’re not already registered on the Forum you will need to register and beRead more
Multihulls can be light and fast but cruising ones must never capsize: They stay inverted.
Single hulled yachts can be self-righting and seaworthy, some large and small ones can survive storms and work to windward in gales but to be quick they need deep weighted keels and a wide hull. Built in buoyancy can avoid sinking but they are outperformed by multihulls.
Can a multihull be seaworthy? Could one work to windward in a gale or sail on when mid Atlantic breakers flatten her? What about an automatic system for capsize recovery? Could a multihull heave to in heavy weather and work slowly to windward like a Contessa? Probably not, but perhaps it could be as seaworthy as the offshore racing fleet.
As is now the custom at our Winter Meeting, members arrived just after noon for a 12.30 pm start. There were seven members and four of their wives present. Three apologies from absence were received from Roy Anderson, Steve McKenna and Colin Weir. After a short introduction, a Buffet Lunch was served which was enjoyed by everyone (thanks Col). Amply fed and watered, the Ladies retired to the conservatory leaving the Gents in the lounge to have their ‘official’ meeting.Read more