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is simply the most
squareboat we know.
She was given the "kamikaze" label by those who watched her
soar out over Lake Alexandrina in a big wind, with a white rooster
tail matching the white knuckles of the white-faced Michael Storer on
his first major proving run.
What that run proved was that all the cynics were wrong! Beth and Mike appeared at the other side of the Lake unscathed and untroubled, and early. Here's the Storer description of her....." Tim Fatchen
Origins and Inspirations:
I drew Beth with a real intention to build her for myself - my first "real design" after years of drawing boats on every spare piece of paper that came my way. There were lots of different ideas that I wanted to try out in a light, cartoppable sailboat:
* the boat to be crewed mostly by one, but with enough carrying capacity for camping gear or a light person for company on daytrips
* performance equivalent to a modern sailing dinghy
beam. It's not
necessarily weight that makes a boat hard to handle on land on one's
own, but bulk. Also, I was curious just how far the beam could be cut
down without resulting in constant capsizing.
Many epic voyages were made across the breadth and down the length of North America in these and similar craft. Captain Frederic Fenger sailed his Yakaboo through the West Indies from Granada, up through the Windward and Leeward Islands to Saba. Many of the passages between islands were 40-50 miles.
I was unlikely to go
to these extremes, I still wanted the boat to be capable of camp
cruising, rather than just being good for racing.
When it came to the detail design, there were more ideas I wanted to try out.
* I wanted to see just how small it was possible to make a rudder and still have control! American E scows tended to tiny rudders, and Fenger's Yakaboo had no rudder at all. In the event, I went a little too small. Current plans have a slightly enlarged rudder with a revised foil shape from the original.
* I had been very impressed with American designer Phil Bolger's "Box Boats", with their flat bottoms and hull sides set at 90 degrees. A hull shape of this sort would certainly cut down my labour - but would the boat sail well and look good? There was one way to find out!
* Old fashioned sails with modern technology - I'd been brought up on modern high performance dinghies. Old fashioned rigs - gaff lug and sprit - are pleasant to the eye, but in my experience they sailed like dogs. Yawl rig also had a doggy reputation; "one mast is fast" had been drummed into me. But what if a traditional rig was set up using modern sail controls and fitted to a hull with high speed potential?
designed as a lug
yawl sailing canoe, with simplified hull shape, a narrow (32")
beam, and length designed to match available plywood sizes.
In working out the sail area, all the antique racing canoe information I was able to find suggested sail areas of around 67 sq ft. I thought that my box hull would have better stability than the older round bilge types, that sails of Dacron would stretch a lot less in strong winds than cotton, and finally that sailing techniques had improved in the last 120 years (!) So I took a blind stab and went for 85 sq ft. I did draw the sails with a couple of sets of reef points...
The building process started off with a bang. I spent a long night making up the side and bottom panels and bulkheads. Two days later, David Wilson and I assembled the hull shell in around half an hour! Advantages of the simplified hullshape. David was as startled as I at how fast it had all happened, but dampened my enthusiasm a bit when he christened it "The Hatbox".
Building then slowed to a more normal pace as conventional decks were fitted, and slowed as six timber spars were tapered and rounded.
the end, it would have
taken about 70% of the time needed for building most performance
dinghies. Cost in 1989 was around $A1600, including sails; about
$A2500 now (about $US1600).
came round and
we put her in at the municipal pond at Mount Barker, in the middle of
a Small Boats day. The wind was very light, so there was little
chance to get a feel for her capabilities, although her high initial
stability was easily demonstrated!
the next several years, I
sailed Beth extensively in New South Wales, South Australia and
Victoria. She has accompanied me on most of my holidays, used mostly
for daysailing with occasional fun racing thrown in. Beth is the
first thing unloaded at holiday destination and last packed when
leaving. She always draws a lot of interest from other sailors
particularly when they realise her speed is well beyond that of other
But the biggest advantage to me is that I can easily handle her by myself on shore - I do not have to be continually asking other people for a hand to move her about.
Beth is fast, performing at a similar level to a club-racing Laser dinghy. She is a little slower upwind but requires a much smaller physical effort. As the waves and wind get up, she does comparatively better as the waves tend to slow her a lot less than the blunt shape of the Laser. Downwind, there are no excuses as she will pass almost anything picking up and surfing down the smallest waves.
forgiving when gybing in strong breezes. In 25 knots I would expect
to ditch a Laser about one in four gybes. With Beth I would expect a
capsize about one in 20 gybes. Part of the forgiveness seems to be
the flexibility of the rig (the "boing" factor), and some
is due to the fact that the balance lug mainsail is not all on the
same side of the mast.
The mizzen is interesting to handle. It can be trimmed to provide a light helm upwind. If oversheeted in a breeze, it stalls the rudder which kicks up an impressive roostertail. But despite the reduced rudder grip, the boat does nothing dramatic, with the rudder biting in again as soon as the mizzen is eased a bit.
Beth turns out an unusual mix of the old and new - the performance of modern boats but the manners of old boats! Just look at all the things that conventional wisdom would say are inefficient: lug sails with the mast interfering with airflow on one side, flat bottom, no hull flare, sails laced to spars, wooden spars, small rudder, narrow beam, tiller lines, yawl rig, pointed stern. Yet her performance is up there with a modern sailing dinghy.
Serpents in Paradise Department:
Beth has a couple of minor limitations. In light airs (glassy water with no ripples at all) she refuses to sail much on port tack, as the minimal airflow over the lee side of the sail is upset by the mast. It's faster to paddle when there's no wind - remember, she is a canoe. In more wind, she sails almost identically on either tack.
In a sloppy and confused chop, such as the traffic-churned Sydney Harbour, there is a tendency to wallow a bit. She deals with aplomb with a very large chop, as for example Lake Alexandrina in South Australia, provided the chop is all coming from the same direction.
Her performance in a beam reach could be a bit better - I cannot get my weight far enough outboard to get her really up and going. She's still fast but there is a definite feeling that she could go a lot faster still if I was about four feet taller... (See blue text at bottom of page).
would only really
recommend Beth to people with a reasonable background in competitive
dinghy sailing - if you can handle a Laser in a blow without getting
into a mess you qualify! AND... the good side - you don't need to be
as fit as a Laser sailor. Beth is a fast, light, responsive boat -
you need the skills to handle her. If you don't quite have that level
of skill but live in an area with predominantly light winds, then she
would be great light weather, sunny day boat.
A couple of aspects have been modified in current plans in light of extensive experience with the prototype. In my original drafting, there were sudden curves in side panels where the bow merged into the mid-section and where the mid-section turned into the stern. Sometimes these curves resulted in embarrassing loud sucking sounds which, apart from personal suggestions, implied a lot of drag. The curves have now been smoothed out!
Based on prototype performance, the rudder has been enlarged slightly and the foil section improved, the diameter of the mainmast increased slightly, and the centreboard lengthened for better upwind performance.
Plans are highly detailed, and fully dimensioned. That means no poring over them with your scale rule and getting scale conversions wrong: the measurements you need to know are written in clear type and in the area that you are looking at.
Leaning Planks and Trapezes:Several people have written or emailed me about how a leaning board or trapeze would solve this "problem" (see blue text above)
Of course the early sailing canoes developed leaning planks not long after the era of Beth's predecessors - around 1882 - primarily through the work of Paul Butler. But look at what happens when you do...
First the mast, or rather both masts have to be thicker to deal with the higher loads. The increase of above deck weight will make Beth considerably less stable.
But probably the biggest difference would be in the sail controls. At the moment Beth has a simple 3:1 mainsheet, a 3:1 downhaul for the mainboom and that is about it. Higher righting moments will double mainsheet loads, when the now 5:1 mainsheet is eased the sail will twist considerably - hmmm - need a boom vang as the vanging effect of the balance lug is now not enough. So get rid of the balance lug and fit a boom vang - there is no point in just mucking around with vangs - no point in anything less than 8:1 - there is some expense in this relative to current trucker's hitch knot that gives the purchase of the current downhaul. The original downhaul has both vanging and downhaul effects - now the functions are seperate.
Now with her much higher speed upwind and when reaching the flat hull bottom will pound very badly - hitting waves at much higher velocities. To gain control when the larger sails want to take charge the rudder area should be increased. With the higher righting moment it also makes sense to increase the height of the sail area - which means the centreboard should be deepened and reinforced to deal with the higher side loads - all things that modern dinghies and raceboats take for granted.
The result is now that Beth is faster, but the cost is excessive, not only in money terms. Now she is much slower to rig, takes serious amounts of concentration to keep on her feet, the rigging - particularly the mechanical advantage - have made her much more expensive to rig (originally 8 blocks mostly small - none ball bearing, one horn cleat, one small cam cleat and one clam cleat) - with the greater mechanical advantage it makes much more sense to move to better quality (and more expensive) ball bearing blocks.
Modern boats are set up in this way and keep moving in more and more expensive directions - and what is the end result?
... the boats all still go much the same speed as each other because everyone has to get the same gear to stay "in the hunt" - so the racing is little different. The real difference is that in Australia, at least, all the little sailing clubs that used to be in most corners of our waterways have simply died out through lack of members. There are other factors that have caused this dramatic change, but the expense of the boats and their increasing complexity has been a significant part of it.
An example of good modern technology are the rudder and centreboard profiles - I supply full size templates to allow accurate shaping - improves the performance markedly. The boat accelerates better out of tacks and goes upwind very nicely indeed. Control is positive in strong wind and rough water. GOOD TECHNOLOGY!
Another place is the spectra or vectran halyard for the mainsail - means you hoist the sail on the beach and it stays hoisted for the whole day if necessary - there is no need to adjust for stretch. The reduction of stretch also helps minimise the sail twist as the sheet is eased for both performance and handling benefits. A few years ago such ropes were expensive (despite that, I forked out for a Kevlar halyard for Beth #1 which proved reliable and cost effective) - now there is only a small differential in price so modern ropes are even a better investment.