[Translate] Several of the PD Racers were building NACA foils. The discussion was that several were feeling that they couldn’t make them to a greater accuracy than 1/16th of an inch. A CNC machine would take the fun out!!! 🙂 The efficiency of NACA sections rely on getting very close to the required shape. Working […]
Racing shows that what you know is what you know. It doesn’t matter if the boat is less than perfect. So where is it best to put in the effort to improve results. Boat setup, knowing how to adjust for different wind conditions, practicing skills until they become automatic, sailing as much as possible … and teaching others.
Fibreglassing 3 – bigger areas – centreboards, rudders, leeboards, keels and larger hull areas requires a different method. Normally glass is draped dry over a clean dry surface and epoxy is applied to the outside and pushed in through the weave.
Golfballs go further because of those dimples on the surface. Would it make sense to have those dimples on a boat hull?It is not quite that simple as this little article attempts to explain.
Fixing up old and antique plywood racing sailing dinghies – International Cadet, Sabre, Sharpie, Cherub, Heron, Snipe, Lightning, Windmill, Fireball, TS16
OK … I decided to keep the old racing dinghy and fix it up. How do I put my effort in the right places to get the maximum results? A grab bag of methods for joining plywood, working out sizes, making centreboards and rudders and more.
Over the years we have been slowly and carefully developing the balance lug rigs we use.on the OzRacers, the BETH sailing canoe and the Goat Island Skiff.For a long time we have offered the best page on the net to assist setup of small boat lugsails. Now a new page with many updates
One of the most important things as a designer or sailor is to keep an open mind, but also to be able to analyze things in light of real experience and prior knowledge.This article, after a bit of a spiel, goes on to give some great resources that “opened my eyes” at different times in my life.They focus on areas of structural design, sailing, sail aerodynamics and touch on a bit more.
OK … it IS a rant. But it was prompted by the very legitimate question about why have a mizzen sail.But sadly I descend into a rant about how expense is a really poor predictor of performance.
The conservative viewpoint is that traditional rigs are not very efficient. However allied to efficient hulls and set up correctly, lug and sprit rigs can be very efficient indeed – not too much slower than “modern” rigs, particularly when the same lessons are applied to trad sails and way cheaper.This is a WIKI drawn from the group on the Storerboats forum discussions on setting up lug and sprit rigs for best performance building on the information in my webpage.
[Translate] Well, I’ve just had a big day up at Duck Flat Wooden Boats doing some work on the 3 PDRacers they are building for the nationals at Goolwa in March. I’m not the only person working on them. Robin Badenoch has been in and more or less finished the masts and is on his […]
Reprint of an article I wrote a few years ago for Watercraft magazine in the UK.The article points out why I think most of the discussion about boat design being a “compromise” is rubbish and taking that point of view means that the design is sure to be compromised.What happens if we don’t accept the compromise?
[Translate] Three PDRacer Basic Hulls Built in 4 working days? Before going our various ways at Xmas Robin Badenoch and I with considerable help from Geraldine and Nathan had a shot at getting three basic PDRacer Hulls together in four working days. Here’s the link 3 x PDRacers basic hulls built – thread on Oz […]
When is it worth fixing an old racing dinghy and when is it best to ditch it?
[Translate] I was writing about this around 2004 when Paulownia first started becoming available from Plantations in Australia. Well before the current boom in its use for framing and hulls of dinghies, yachts and other boats. Paulownia is a very lightweight timber from China that has started to become available in quantity in Australia and […]
[Translate] Where a seam has to be glassed and it is difficult to make the glass sit flat because of a complex curve then a double bias tape is used. It is also useful for complex 3D curves like the tips of centreboards and rudders. Commercial double bias tapes can be bought but you can […]
Some basic questions were asked on my forum about the design of amas.There are so many permutation of ama length, crossbeam width, ama volume with performance ranging from very poor to very good. But what are some of the basic criteria?
The dot in the bay above is Perttu’s Microcruiser sailboat on a three day trip on the extensive Finnish waterways.The boat is tiny – 8ft long and is based on my successful OzRacer design (formerly OZ PDRacer)It is a brilliant concept and sails well upwind and down on inland waters.
The OzRacer Mk3 has been rebranded as the OzRacer RV.Detailed plan – a boatbuilding course in a book for $20 each.So now racing sailors can use the OzRacer Mk2 and cruising sailors can use the OzRacer RV plan. The RV is no slouch though – it won the World titles in 2010.