The first daysail of the season occured today. I went out to an island, anchored and had coffee. Sailed home. Made a boring video. Almost froze my hands off when I hauled up the anchor line out of that ice cold liquid I was sailing in (or on). It was quite warm and sunny, though and the wind was good.
I have also tried out the solar charger and battery combination I was experimenting with lately. It's an old alarm battery from work connected to a small solar charger. So now I've a proper 12V system and can charge anything with a usual car charger. Charges the iphone in less than three hours. Not sure how long the solar thing needs to top up the battery after that, but shouldn't be longer than the iphone takes to run flat again.
Oh, and here's the video.
Showing posts with label Technical information. Show all posts
Showing posts with label Technical information. Show all posts
Sunday, April 25, 2010
Wednesday, April 29, 2009
Original engine mount
I have been asked to post some pictures of the engine mount which, on my boat, is the original one (at least I believe so). It seems to be designed to be able to slide up and down, but mine is definitely stuck in the down-position. Here are the pics:
Monday, October 20, 2008
Sail plans and quotes
Just found an extensive array of sail plans on the sailrite website. There are six different Alacrity sail options, a mainsail, two different jibs, a genoa, a spinnaker and an assymetrical dito. The website even offers quotes for new sails online.
Link to the website.
More on goosenecks
Sue Jones sent me a picture of her gooseneck, or her boat's rather. It is of a different kind as mine. The boom has a built in rotating mechanism. A handle (not shown) is to be stuck into the hole in the boom. Inside a mechanism rotates the boom when the handle is turned. A better system as on my boat it seems, but then again it has to work, which Sue's apparently does not. Maybe the mechanism inside is seized.
Saturday, October 11, 2008
About roller boom reefing
There has recently been a discussion on the Alacrity mailing list about how the original roller boom reefing system is supposed to look like. Apparently some boats have some kind of device with a handle that, when turned, rotates the boom and rolls the sail around it.
My own boat does not have this device. Instead the arrangement is the simplest possible. The boom sits on a pin that is round at the top but square at the bottom. The hole in the boom is square. Thus the boom cannot rotate when it sticks completely on the pin. In order to reef the sail you have to move the boom partially off the pin, roll the sail in and then stick it back. This can of course be a difficult enough task when at sea in a swell. I have myself only tried this once or twice, normally I use to reef the classic way with lines. However, I may try the roller some more as it has it's advantages. The reefed part of the sail is rolled tidily away for example. However, one disadvantage is that the boom drops lower at its aft end endangering the heads of everybody in the cockpit when tacking.
My own boat does not have this device. Instead the arrangement is the simplest possible. The boom sits on a pin that is round at the top but square at the bottom. The hole in the boom is square. Thus the boom cannot rotate when it sticks completely on the pin. In order to reef the sail you have to move the boom partially off the pin, roll the sail in and then stick it back. This can of course be a difficult enough task when at sea in a swell. I have myself only tried this once or twice, normally I use to reef the classic way with lines. However, I may try the roller some more as it has it's advantages. The reefed part of the sail is rolled tidily away for example. However, one disadvantage is that the boom drops lower at its aft end endangering the heads of everybody in the cockpit when tacking.
Wednesday, June 11, 2008
Rudder dimensions
Sail plan
I have been unable to find an official sail plan for the boat. However these figures should be about right. I have since ordered a new mainsail and jib for my boat and did not have any problems communicating to the sailmaker's what I wanted.
Edit: the figures in the pic are unreadable for some reason. They are:
I: 23.00 (7m)
J: 6.20 (1,9m)
P: 20.00 (6m)
e: 8.70 (2,6m)
A more elaborate sail plan is also to be found here.
Technical information
The Alacrity looks very similar to the Vivacity sailboat. In fact they are almost indistinguishable. However, the Vivacity is somewhat bigger and heavier. The basic specs for the Alacrity are these:
Lenght overall 18´6'' 5,75m
Length waterline 17' 5,2m
Beam 6'11'' 2,10m
Draft 1'10' 0,55m
(twin keels)
Displacement 1450lbs 650kg
Keel weight 480 lbs (240 lbs each keel)
Distance between keels (outside): 1.23 m
Rig Masthead
Sail area main 9m2
Sail area genoa 8,4m2
Sail area jib 5,2m2
Go here for:
Mast dimensions
Trailer dimensions
Rudder dimensions
Sail plan
Original Sales Brochure Scan
Wednesday, July 11, 2007
Alacrity history
I do not know very much about the boats' history yet. However I found some things on a few yacht brokers' homepages and in old books and magazines. (Many thanks to Craig Anderson of the Old Twin Keeler Newsletter and Simon Harrison from the UK who provided me with a lot of material).
I am still looking for more information though, so if you know something interesting, please tell me.
The Alacrity 19 was designed in 1960 by Peter Stephenson. It was an open plan, relatively beamy yacht and they were built by Hurley Marine for the
Essex based Hurley agent Russell Marine Ltd. They performed well but the accommodation and headroom was limited.
The Alacrity was marketed as a Hurley for one year - 1969. Hurley did not just mould the hulls for Russell Marine but completed the whole yacht ready to take to sea. Russell Marine built them alone after about 1972.
I don't know how many boats were built, but it is more than 1000.
The design was based on an original plywood design, although adapted to fiberglass later and made a bit longer (18'6'' instead of 17'3''). There is still a lot of wood in the interior of the boat.
Apparently the hull for the plywood version was made in the same factory and using the same processes as the Mosquito bomber of WW2 which was an all-wood aircraft.
There are several versions of the boat: The Mk1, MkII, and the weekender which seems to be an MkII with a slightly different cabin layout.
Additionally there is a model called Alacrity 670 (or Catalina 22 in the USA). This boat is not based on the same design.
There are also some similarities between the Alacrity and the Vivacity 20, drawn by Desmond Pollard. The Vivacity 20 basically is a somewhat longer and heavier version of the Alacrity.
The Alacrity 19 is sometimes also referred to as Alacrity 18.
I am still looking for more information though, so if you know something interesting, please tell me.
The Alacrity 19 was designed in 1960 by Peter Stephenson. It was an open plan, relatively beamy yacht and they were built by Hurley Marine for the
Essex based Hurley agent Russell Marine Ltd. They performed well but the accommodation and headroom was limited.
The Alacrity was marketed as a Hurley for one year - 1969. Hurley did not just mould the hulls for Russell Marine but completed the whole yacht ready to take to sea. Russell Marine built them alone after about 1972.
I don't know how many boats were built, but it is more than 1000.
The design was based on an original plywood design, although adapted to fiberglass later and made a bit longer (18'6'' instead of 17'3''). There is still a lot of wood in the interior of the boat.
Apparently the hull for the plywood version was made in the same factory and using the same processes as the Mosquito bomber of WW2 which was an all-wood aircraft.
There are several versions of the boat: The Mk1, MkII, and the weekender which seems to be an MkII with a slightly different cabin layout.
Additionally there is a model called Alacrity 670 (or Catalina 22 in the USA). This boat is not based on the same design.
There are also some similarities between the Alacrity and the Vivacity 20, drawn by Desmond Pollard. The Vivacity 20 basically is a somewhat longer and heavier version of the Alacrity.
The Alacrity 19 is sometimes also referred to as Alacrity 18.
Wednesday, April 11, 2007
Alacrity Mk2 Test Report in German Yacht Magazine
(Translation by Jens Kuhn)
Bilge keels have become more and more popular in the last few years, especially in smaller boats up to eight meters length. The disadvantage of not being able to sail as close to the wind is gladly accepted considering the increased stability. The bilge keels prevent extended rolling while sailing before the wind and increase the lateral resistance while reaching. Another big advantage is, of course, that a bilge keeler sits upright when grounded in tidal waters.
The Alacrity is one of those small bilge keelers. Because of the flat, rounded hull and the bilge keels with 110 kg leed ballast in each, she lies relatively steady in the water. Deck and hull being made of fiberglass, maintenance is easy. In the cabin are berths for two adults and two children. However, quite often a layout with three permanent berths is used. Storage is adequate for four. There is a pentry and a toilet can be fitted.
Below the waterline, the hull is made of six and above the waterline of four layers of fiberglass mat. Deck and cabin top are also made of four layers, with laminated oak bars in the cabin roof.
Stringers and floor boards are made of laminated oak, bulkheads, cabin interior and hatches of marine plywood. Rigging and deck fittings are of stainless steel.
Deck and cabin floor have antislip surface. The interior of the 3,10 x 2,05 cm cabin and the 1,65 x 205cm cockpit has been well used. The hull comes either in white, black, pale blue or red colors. A trailer is availabe.
Die Yacht 9/1963
Bilge keels have become more and more popular in the last few years, especially in smaller boats up to eight meters length. The disadvantage of not being able to sail as close to the wind is gladly accepted considering the increased stability. The bilge keels prevent extended rolling while sailing before the wind and increase the lateral resistance while reaching. Another big advantage is, of course, that a bilge keeler sits upright when grounded in tidal waters.
The Alacrity is one of those small bilge keelers. Because of the flat, rounded hull and the bilge keels with 110 kg leed ballast in each, she lies relatively steady in the water. Deck and hull being made of fiberglass, maintenance is easy. In the cabin are berths for two adults and two children. However, quite often a layout with three permanent berths is used. Storage is adequate for four. There is a pentry and a toilet can be fitted.
Below the waterline, the hull is made of six and above the waterline of four layers of fiberglass mat. Deck and cabin top are also made of four layers, with laminated oak bars in the cabin roof.
Stringers and floor boards are made of laminated oak, bulkheads, cabin interior and hatches of marine plywood. Rigging and deck fittings are of stainless steel.
Deck and cabin floor have antislip surface. The interior of the 3,10 x 2,05 cm cabin and the 1,65 x 205cm cockpit has been well used. The hull comes either in white, black, pale blue or red colors. A trailer is availabe.
Die Yacht 9/1963
Alacrity test report
From the Swedish Magazine Båtnytt. (translation by Jens Kuhn)
The name Alacrity suits this little British boat quite well - it has already done well in Sweden both with buyers and the exhibition public.
The circumstances were not the best when Båtnytt test sailed the Alacrity on Sunday, February 16th off Langedrag in Gothenburg. It was -6 degrees centigrade and a 10-14 knots of wind, plus some really irritating snowfall. However, we got a quite clear picture of the boat and it's characteristics. The verdict is that of a easily handled, relatively fast and agile, comfortable and stiff little sailboat.
Hull and construction
The Alacrity has a dinghy-like hull with really shallow bottom, a good stern, but somewhat broad bows. The hull has twin keels, one on either side, built of oak and fitted with 100kg of lead ballast each. The rest of the boat is built of fiberglass. The use of wood is limited to the rudder, plywood interior and beams.
The finish was good except for some minor transportation damage. The deck and cabin roof where somewhat slippery. The cockpit was a litte uncomfortable due to the same slipperiness. The cockpit is of course self draining, but yet very deep.
The cabin interior is practical and smart with three berths, the two aft ones partly under the cockpit, pentry and cupboard, as well as space for a toilet. Under the cockpit is a lot of stowage space.
The woodwork in the cabin was badly fitted in the boat we tested, and the plywood was certainly not clean enough before it was varnished. Here the producer should put in some more effort.
Sails and rigging
The Alacrity has a relatively low and simple masthead rig. The sails are of 4,5 oz terylene and stood fairly well. The spars are made of aluminium. The boom fitting is very simple, the sail is reefed by pulling out the boom, rotate it and put it back in. Nothing you want to do at sea in bad weather...
The rig is stainless with single spreaders and double backstays. The turnbuckles are somewhat weak. The mast is stepped in a tabernacle on deck which has the advantage that it is easy to rig and that the mast can be lowered backwards.
The overall impression is that of utmost simplicity and easiness of handling without compromizing doing the right thing. Mostly this has been accomplished.
Sailing performance
The pros and cons of bilge keels have recently being discussed a lot. They are not that common here, even if several lately imported boats do have them. The biggest advantage is not that important in our waters. It's the capability to take the ground at low tide. But a boat with twin keels is easier to fix on a trailer and that is an advantage, too.
A single keel boats lateral resistance in the water is less when heeled and the keel's leeward performance is worse. Having twin keels slightly pointing outwards, the bilge keelers leeward keel points straight downwards when the boat is heeled and performs thus better. In addition, the other keel ballast makes the boat heel somewhat less. It is self evident that having two keels they can be made less deep than having only one. The effect is that the boat has shallower draught and less wetted area than a twin keeler otherwise would have.
However it can be stated that twin keelers sail slightly worse than single keel boats. This can in fact be felt in the boat and in the rudder. There are some currents and vibrations that can do nothing else that to affect the boats speed. Maybe the shape of the keels and their position to each other could be better.
The Alacrity appears to be sailing well, has good leeward performance and the speed itself is nothing to complain about. She tacks very quickly and happily, but does not like to be pointed too high against the sea - there the quite broad bows stop her. Even in the heavy winter wind she wears her 14,2 square meters of sails perfectly and in gusts she shows an "elastic" stiffness which presumably has to be put on the twin keels account. It was not possible for us to test her in heavier waves, but we got a suspicion that she maybe is not extremely dry in a choppy sea.
The rigging is well balanced and the boat's weather helm not bigger than it should be. The Alacrity needs continuous attention at the tiller, possibly due to the leeward keel's movement through the water. Maybe a different rudder, deeper and thinner than the broad curved one could be an advantage.
Apart from these things there is nothing more severe to complain about the Alacrity, which has to be seen as a spledid exampel of this more and more popular type of smaller sailboats for family cruising as well as offshore sailing.
Friday, January 12, 2007
Inside a pair of keels
I got an email from Thomas Swenson with some really interesting pictures from the inside of his Alacrity's keels. Here is his email:
> Hi Jens. Hope your having a good new year. I have
> been sanding my hull and keels. I found the inside
> of the keels are bulged outward and sound hollow.
> they have been dripping water since I brought it
> home. I made a boat stand for it and got it off the
> trailer. I drilled holes in the keels to let the
> water drain out. There was a lot of water in them. I
> think the water freezing made the bulges, so I cut
> large holes were the hollow sounds are. I thought
> the ballast was made of lead, but it seems although
> this is some lead there is also peaces of metal and
> copper pipes. Is this the way it should be? Should
> the inside of the keels be flat? I will try to send
> pictures so you can see what I'm talking about. Any
> advice you can give would be deeply appreciated.
> Tom
And here are the pics:
2006-01-22 Thomas sent me this update:
> Hi Jens. Doing more keel work, I found the pipes
> that I had thought were copper are lead. Some still
> had water in them. The dark gray area in the second
> picture is metal pieces that are wet and corroding.
> I plan to replace them with lead and seal it back in
> the keel . that's that's all still in the planning ,
> but I had to empty the keel to dry it out. The
> outside skin of the keel may need to be removed to
> make it straight. It has a slight bow in it. I'm not
> sure if it should be there?
> Hi Jens. Hope your having a good new year. I have
> been sanding my hull and keels. I found the inside
> of the keels are bulged outward and sound hollow.
> they have been dripping water since I brought it
> home. I made a boat stand for it and got it off the
> trailer. I drilled holes in the keels to let the
> water drain out. There was a lot of water in them. I
> think the water freezing made the bulges, so I cut
> large holes were the hollow sounds are. I thought
> the ballast was made of lead, but it seems although
> this is some lead there is also peaces of metal and
> copper pipes. Is this the way it should be? Should
> the inside of the keels be flat? I will try to send
> pictures so you can see what I'm talking about. Any
> advice you can give would be deeply appreciated.
> Tom
And here are the pics:
2006-01-22 Thomas sent me this update:
> Hi Jens. Doing more keel work, I found the pipes
> that I had thought were copper are lead. Some still
> had water in them. The dark gray area in the second
> picture is metal pieces that are wet and corroding.
> I plan to replace them with lead and seal it back in
> the keel . that's that's all still in the planning ,
> but I had to empty the keel to dry it out. The
> outside skin of the keel may need to be removed to
> make it straight. It has a slight bow in it. I'm not
> sure if it should be there?
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