On sailing a Folksong – Speed formula

A calculation I have never made before:

The speed that a yacht’s hull can be made to travel through water is related to waterline length.

The formula for an average sea-going yacht of conventional shape is:

Speed in knots = 1.4 x Square root of the L.W.L. in feet

The multiplier is altered according to the type of hull. It may range from 1.25 for a tubby hull to 1.5 for a large racing yacht.

Therefore Blue Mistress’ theoretical maximum speed at L.W.L of 19′ 8″:

= 1.4 x Square root of 19.66 ft

= 1.4 x 4.434

= 6.2 knots (Always remembering that speed through water is not the same as speed over the ground).

We were doing a little less in the clip below

On sailing a Folksong – thoughts on expenses

Most posts get written and published relatively swiftly. Some get started then abandoned. This one has hung around for several days and now I realise why: I go sailing to get away from this sort of discussion! The irony is that I can’t go sailing unless I discuss it (Catch 22). So I will finish and publish, and think of  it as a rite of passage.

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This New Year especially some serious financial planning is needed if we are going to enjoy another year’s sailing.

Here are some thoughts on the expenses involved.

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Last spring, I watched Super Yachts in the Adriatic and the Open 60 fleet out of Plymouth. During the summer Blue Mistress wallowed in the wash of luxury Princess yachts. I have just been watching clips of the Sydney-Hobart Race and I am bombarded monthly by journals full of expensive yachts and luxury accessories. As far as sailing is concerned, I know my place when it comes to what I can afford – and it isn’t at that end of the market.

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“Whatever you want, oh discontented man. Step up! Pay the price. and take it.” James Allen

Exciting thought? I am sure you read the first part and the last part. Did you see the bit in the middle about ‘pay the price’?

“If you have to ask the price, you can’t afford it.”

Right? Wrong!

I used to think this was fair comment. It made me reconsider whether I really did need this or that piece of kit!

Now I think differently. At its best, not asking the price is a sign of no-management. More likely it’s a sign of bad-management. And we are all now living with the results of both.

So here is a quote from me: “Good financial management is a basic ingredient of good boat management”.

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In the preface to “Shipmasters Business Companion, including Hints to Young Shipmasters” by J.W Anderson, price 5/6 net, printed in 1920, Captain Anderson writes:

“It is of the greatest importance that a young shipmaster should study his business well and thoroughly, and should endeavour at all times to be prepared for any emergency; the man who is well prepared generally comes out on top.” (For ‘any emergency’ include financial ones, for ‘young shipmaster’ include older boat owners).

It doesn’t matter whether it’s 1920 or 2020, this will always hold true.

That the boat creates no direct financial income is irrelevant. The income in terms of recreational value and spillover benefits is priceless.

Nevertheless, expenses are very real and must be balanced in some way if they are not going to sink the whole project.

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So where does the money come from? ‘Credit’ doesn’t work any more; living ‘hand-to-mouth’ on the water might be great if you had the time and the freedom; and, yes, there are people who will always afford it, directly or through sponsorship. The rest of us have to get out there and earn it – and then spend it wisely (more or less).

Blue Mistress’ expenses break down like this:

  • Initial cost of boat
  • Marine survey
  • Documents/Subscriptions
  • Marine Insurance
  • Mooring/Berth
  • Boatyard Costs
  • Electronics/Software
  • Sails/Rigging
  • Engine/Fuel
  • Safety
  • R&R
  • Courses/Books/DVDs
  • Chandlery
  • Provisions
  • Sundry

To make the dull process of recording the figures easier, I’ve come to thinking of the categories as instruments in a jazz band – some provide the basic rhythm (moorings, subscriptions etc) and the rest get brought in at the right moment to create great music – louder, softer or not at all depending on what I can afford at the time.

For example, I will hang fire on a new rudder this year, but there is some work that needs doing down below that will get done in February and March, and the paintwork, and . . .

Here’s another quote – “it’s not what you say, it’s the music you play”

Maybe there are ways of making the world work without having to be so darned serious all the time – but you’ve got to be serious occasionally and get the basics right.

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And, besides money, the other two major expenses are:

A great deal of Time

and

A whole lot of Energy

Which brings us on to income – more of which later.

Acknowledging the past

On Boxing Day, at low tide, we walked on the beach.

Empty quay, Bude, Boxing Day, 2008

The weather was one of blue skies and crystal-clear visibility.

The views were amazing, but there is always more to a view than meets the eye – there is a history that rides with it.

Ceres, Bude

This is not a request to  focus on the past, but to share it – to acknowledge that the past existed and that those who lived through it were no different from us.

They too saw the world change before their eyes and their old certainties lost to an unknown future.

Low tide, Bude, Boxing Day, 2008

Thus the toast this Christmas is the toast of Christmas’ past –  “Absent Friends”.

Ceres, waiting for the tide, Bude

For more on Ceres here, here and here

On Steeple Point – Low tide, Duckpool

Here are four images taken yesterday morning at Duckpool on the coast of North Cornwall.

A combination of low tide, bright sunshine,  and a cold, easterly, offshore wind.

This is a wreckers’ coastline – to be avoided on a lee shore.

Yesterday it was a place to take the air after Christmas.

On sailing a Folksong – rudder 2

Blue Mistress has a very heavy rudder – “overworked”, the marine surveyor called it.

It might have graced the stern of an early twentieth century vessel.

Compared to similar sized craft, it is also slightly short of the keel . . .

For example, another Folksong 26 . . .

a Folkboat . . .

a Contessa 26**  . . .

This may mean that Blue Mistress’ rudder has been repaired sometime in the past, but it may not . . .

So, I’m looking for the answers to three questions:

What is the effect of a heavy rudder on the sailing performance of a long-keeled boat?

What is the effect of a shorter rudder on the sailing performance of a long-keeled boat?

What is the effect of rudder shape on the sailing performance of a long-keeled boat?

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A younger me would have searched for a definitive answer.

Now I don’t think there is one answer – but a series of ideas about rudders that, put together, mean we can learn more about small, long-keeled boats.

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For example, a Google search showed the Swedish Folkboat Association having a useful note on this – here.

In their submission to the Nordic International Folkboat Association, they state: “We have consulted Lars Larsson, professor in hydrodynamics on Chalmers (Gothenburg’s technical university), folkboat sailor, and earlier three times Swedish Champion in Folkboats. He thinks that the lifting power 10 kg has a moderate effect – the same as if the whole crew (250 kg) moves 0.1 m forwards in the boat. Hydrodynamically it can be a favour to make the rudder a little thicker, so that the water follows a harmonic bend along the keel and rudder on the boats windward side when it tacks with a rudder angel of about 5 degrees ( to prevent the boat from turning up against the wind). The shape of the leeward side is of less importance. To make an even thicker rudder is a disadvantage hydrodynamically.”

The Association then dealt with it in a formal fashion, i.e. there is a revised class rule to be adhered to – here.

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Fair enough. But here are no class rules with a Folksong 26, so we have some leeway, which means we can work it out for ourselves . . . with a little help from friends.

If you have answers, part answers – or even more questions, please feel free to comment..

**(I am very grateful to Nick for allowing me to use this picture of Constellation. I enjoy his blog and highly recommend following and supporting his venture back to Australia on Big Oceans/Tiny Boat)

On sailing a Folksong – rudder 1

Getting to know a boat . . .

How long does it take to get to know a boat?

Longer than most people think.

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When I first sailed Blue Mistress, she had a lot of weather helm.

I thought it might be something to do with the rudder.

It became a feature of our sailing – slowed us a little but it didn’t stop us. I got used to it.

Then I discovered it wasn’t necessarily the rudder.

I learnt to trim the sails more carefully, and got used to selecting the ‘right’ foresail for the particular weather. I reduced it – significantly.

That was a pretty obvious, you say.

Perhaps, but, problems often work that way – they crop up and are set aside to be solved later. We get used to them and move on because there are plenty of other problems to deal with.

The bigger, more pressing problems draw our attention and the lesser ones are tolerated and fade into the background.

As a result many of us live our lives at less than our full potential – mildly (or heavily) inhibited by a pot full of unfinished business.

“All problems carry their own solutions” (anon), but it takes some event to stir us into revisiting a tolerated problem and looking for the solution.

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So with the weather helm.

A calm day, force 1, following two slightly bigger yachts with different keels, wondering whether I could keep up – (it was already apparent that my leeway was less).

I was sailing with the No 1 foresail. The lighter, larger genoa would have made a lot of difference.

On Blue Mistress, the No 1 foresail works best in a blow with one reef in the main. It was good practice to be working with it in light airs.

Easing the foresheet to give the foresail more power, and bringing the main sheet up the traveller and the boom midships, took some weigh off the tiller and gave us an extra half knot in the light wind.

They always had the edge on me in this light air, but we sailed all the way to Cawsand whereas they tacked back as they approached Picklecombe Point.

Straightfoward stuff.

I didn’t solve the weather helm problem, but I did consider it more closely and began to tackle it.

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And I enjoyed the sense of a race.

Sailing is always a race – sometimes against other boats but mostly against the tide, the weather, time – and our own need to keep up.

Inward bound

I took a series of images of Cemluna inward bound on the last of the tide this morning.

Not my usual subject but the moment was right.

Whether you are interested in ships or not, I defy you to ignore the grace of such a large object being shepherded gently through the water

Then this evening, I was directed to Tugster’s blog – stunning images and a facinating site.

Photography is not always the answer

Photography is often frustrating because what you are able to record is a small fraction of what you want to record. Sometimes it’s what is outside the image that makes the image itself worthwhile. At other times it’s better not to try but to leave the moment alone.

This was the case the other morning when we set out to enjoy a short sail.

As we left the Sound, the wind strengthened and steadied from the west. We settled on a course south south west, Eddystone on our starboard bow – four and a half knots across a gentle swell.

The sky had been heavily overcast all morning – a dark layer of stratus that shut out the sun and promised rain.  But, for now, there were clear patches of blue sky showing in the west.

It was that approaching blue sky that held our attention as, four miles out, we watched the coast come to life – cherished Cornwall unveiling in the sunshine.

First the Dodman, then the steep cliffs around Fowey, the green fields behind Polperro and on to the bright houses of Looe, sunlight flashing on expectant windows; Downderry sparkled along the water’s edge, pointing to Portwrinkle still hidden behind Rame, before the headland itself beamed out at us.

Silenced, we breathed in the startling November light, marvelling at the clarity of detail, excited by the intensity of the experience. Behind us the sea seemed to darken.

Suddenly, inland, the high chimney stack on Kit Hill stood proud in the sunshine. Next, a group of buildings on Plymouth Hoe, white beacons in the afternoon, overwhelming their less fortunate neighbours. In the foreground, the Breakwater leapt at us. And the whole stunning display moved eastward – scudding along the South Devon coast.

By now, Cornwall was dark again and disappearing fast.

Five miles out we turned for home, basking in our own ten-minute spotlight before, with the Cornish coast lost behind Rame, the gloom bore down on us. Dartmoor disappeared behind the city, leaving it without background – bleak, solemn and solitary, enveloped in drizzle.

We rounded the Breakwater in the murk, the band of drizzle mercifully lifting as we crossed the Sound.

A little later, dry and ashore, we watched the next band of rain cross the Cattewater, blotting out the familiar view.

It was a day to treasure – a day when there was more to sailing than the sailing, more images than could possibly be recorded.