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  #451  
Old 08-23-2009, 03:35 AM
masalai masalai is offline
masalai
 
Join Date: Oct 2007
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Location: cruising, Australia
johngilpin, Not really on this thread as it is a record of my build, look around for an appropriate forum then create a thread for yourself there... A clear picture, some dimensions and its weight would help, as well as what speed you were looking to achieve or really, to what purpose were you going to put your 16 ft ALUMINIUM? dory...

Good luck...
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  #452  
Old 08-26-2009, 05:52 PM
masalai masalai is offline
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Hi JohnGilpin,
Thanks for the PM, I thought I would respond here as there seem quite a few "newbies" who may also appreciate a little help... At the Boat Design Forum (home page, almost) is a list of all major forums, and in many you may find some sub categories, so, lets say this forum <Boatbuilding> to get there just click on that word above in "hyper-link blue"... There you will see a list of threads, above that list of threads between the two "menu bars" you will see a little button that says <New Thread> - click that button, then continue creating your very own thread... In the opening text, define the purpose of the thread - call it like "JG dory build learning process" or whatever suits your mood/purpose... Multiple spaces get reduced to 1, repeats of the same character/smiles are restricted in number sometimes... Images are restricted to 2MB and 5 per post and an enforced delay to add more to the next post except in your personal "Gallery", videos are less than 10MB... (2 shots in HD - 1920 x 1080 movie )... Enjoy and have fun...
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  #453  
Old 08-26-2009, 09:50 PM
masalai masalai is offline
masalai
 
Join Date: Oct 2007
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Who now (on reading this), would now dare to say economics is dull and of no value... Well this is the best report on battery technology I have read yet... Hope all you good folk out there feel it was valid and interesting information from my piles of economic news emails... http://www.eetimes.com/news/latest/s...leID=219400089 give the page a chance to load, sometimes it is a bit slow...??? Do not forget this link, http://www.greensupplyline.com/showA...queryText=Volt , (at the end of the "eetimes" original link on LiFePO4 batteries) will they be sufficiently reliable and cost effective by March/April 2010? when I am looking for my batteries.... and what of the charge/battery condition monitoring technology and all the problems currently being discussed elsewhere on boatdesign.net.....
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  #454  
Old 08-28-2009, 12:56 AM
downunder downunder is offline
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Join Date: May 2009
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Location: Mackay,QLD, Australia
Keels vs daggerboards - researching 40-45 ft cats

One plus for fixed keels on a cat for cruising is the increased displacement
For instance Grainger quotes 680kg for fixed keels on a barefoot 45.

My observations for a long distance crusing vessel is that almost all are restricted in range and running to the next port for fuel and or supplies.

mmm half bottle wine/day for 4 persons for 3 months adds up - 2 bottles
x 60days - perhaps casks will be lighter --

Seems to me if one is travelling in PNG, Pacific or top of WA where fuel may be hard to come by and quality doggy is best to carry more fuel than most do and be independent. In the areas I plan to be at times wind may be lacking and it is useful to have plenty of fuel to spare.

Long distance crusing vessels need to carry a fair payload and in particular adequate anchoring gear - all chain - remembering more vessels are lost through inadequate ground tackle than any other cause. A major issue for me will be dive compressor and equipt - adds weight and need for good displacement.

Would be interested in why you and bob Oram have gone for balsa rather than foam core. I note from Grainger foam core provides lighter construction. For example

Upper hull side balsa -141.37kg foam 106.65kg
cabin side balsa - 34.9kg foam 24.5kg

At present I have short listed the following designs but have plenty of time to observe.

Freeflow44; Grainger Barefoot 45 and Oram 44C. Time will tell. All are modern flat panel construction.

Mas observing your build and the speed of it is enlightening. With your permission i would like to drop by for a look early Janurary when i am in brisbane
Regards,
\
John

Last edited by downunder : 08-28-2009 at 12:59 AM. Reason: spelling
  #455  
Old 08-28-2009, 01:57 AM
masalai masalai is offline
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Join Date: Oct 2007
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downunder, welcome to the net, Balsa has the qualities I need and for my purposes is the better choice, ATL is very good at looking after its customers, have a long look around and see what you can find here http://www.atlcomposites.com.au/atl_composites/ and have a chat with your designer for their view. I personally would be reluctant to use foam core - it may be a valid and worthy product, but does not satisfy me... There are four 44's designed by Bob Oram in the vicinity (including the Sunshine Coast - other side of Buderim)... PM me with some personal contact info and your schedule nearer to when you are ready...
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  #456  
Old 08-28-2009, 03:08 AM
masalai masalai is offline
masalai
 
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Well I guess, since there are no dramatic photographs to post as all the work currently is detailing stuff, shelving, making small items, preparing for through hull fittings and what goes where - no pretty pictures.....

I thought some discussion (pontification as many may suggest) on selecting a design...

Catamarans are adversely effected by weight and if you are so stupid that you overload a cat design, then you are looking for a disaster, and the designer will not be pleased to see his hard work and reputation besmirched by a 'hoarder' who puts 4 tons in a boat designed to carry 1 ton... If you need to carry a lot of stuff get a heavy steel mono....

Think carefully of your cruising ground and the land based facilities that you will regularly use.... - - will your "dream boat" fit in the marina berths? - - will you avoid marinas except for provisioning and fuel? - - do you plan to make some long passages - - do you like to anchor up every night? - - Look at google earth and identify where provisions and other services may be available (where there is a coastal town is a start)... - - Do you need to sail, - or is, by motor the preferred option?, long range motoring seems to average 8 to 15 knots, so why engine for 20 or so?, sail is far more gentle and variable, being reliant on wind & weather, motoring only to enter a secure mooring site up a creek or in a marina... As a rule of thumb ?????? - sitting somewhere, is where you are for 80% of the days... Up a creek hiding from a severe storm etc for some time... being "trapped" in the doldrums sometimes?... Enjoying some fantastic sailing weather - all too brief and something to remember Exploring ashore or visiting new found friends Socialising aboard makes up most of the rest....

For cruising in a cat, many stops will be in sandy areas, ensure you have an appropriate anchor... Feel free to add your thoughts so long as the response is generally applicable anywhere

These and many other factors that influence the size and style of your boat.... Cannot afford one that big? - - Oops reality cuts in... remember, a boat is a compromise..........
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  #457  
Old 08-30-2009, 04:55 AM
masalai masalai is offline
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For why, I don't know, but here are some images of what has been done lately - - sealed lower aft void P & S, - revised aft bulkhead (full width), - part of the storage, port midships will be "framed" with beading, - Shower stall & hand-basin bench being fitted, - panel to receive shower stall cupboard doors...
Attached Thumbnails
My little piece of peace-dscn2388.jpg  My little piece of peace-dscn2389.jpg  My little piece of peace-dscn2390.jpg  

My little piece of peace-dscn2391.jpg  My little piece of peace-dscn2392.jpg  
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  #458  
Old 08-30-2009, 05:10 AM
masalai masalai is offline
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Starboard shelving/cupboards awaiting painting & trim, - bases for aft P & S berths being fitted with hatches to access the "hold" below, - forming for the leading face of the bridgedeck, - Lastly, "rough as guts" (now you know why I have a build crew) but it shows the approximate layout for the rigging and representation of sails/sheets - for those with a vivid imagination... anyhow, I can now visualise some things that need to be resolved?....
Attached Thumbnails
My little piece of peace-dscn2393.jpg  My little piece of peace-dscn2394.jpg  My little piece of peace-dscn2395.jpg  

My little piece of peace-dscn2396.jpg  
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  #459  
Old 08-30-2009, 01:24 PM
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Fanie Fanie is offline
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Quote:
Well I guess, since there are no dramatic photographs to post as all the work currently is detailing stuff,
That is where the most work is. Do put them pics up too, because that is where it makes the biggest difference !
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  #460  
Old 08-30-2009, 02:00 PM
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Scrumble Scrumble is offline
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Yes please Mas, I agree with Fanie keep up the photos of little detail bits. The interior is looking very interesting with great work.

Also your little model is an excellent way to show the rig. Will you be using the standard chain-plates the team have built? Am I correct with what I see on your model, that you will have two back stays going to a point on the end of the back beam?

Regards, Tom
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  #461  
Old 08-31-2009, 12:01 AM
masalai masalai is offline
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Bob visited and wants the aft chainplates further forward, (at the aft bulkhead for the aft berth), than where I marked about 2 feet further aft, bugger, now to re-figure where the sheets will go and possibly with smaller genoas' but only 7 degrees tilt on the mast - I put 11 Degrees - so straighten it up a bit and mast height and diamonds are an unknown as yet...

OK I will discuss with the crew where we should show some good filleting (could do a shot at the local fish shop), and some macro type shots around the place so you perfectionists can criticise it to shreds....

ATL is delivering some new hardner to better match the cure time to the warming weather, - (Global warming here with hottest early spring temperatures in 30 odd years)... and some more DuFLEX panels for the deck and coach-house roof.... Good service and good product from ATL...
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  #462  
Old 08-31-2009, 03:21 AM
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Fanie Fanie is offline
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Quote:
aft chainplates further forward, (at the aft bulkhead for the aft berth)
Chain plates ! So that's how you keep your woman from running off

Quote:
OK I will discuss with the crew where
OK, what happened to the crew Manie promissed... seems there really are a LOT of compromises on a boat eh
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  #463  
Old 08-31-2009, 05:12 AM
masalai masalai is offline
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Never showed up, heard about the chainplates seemed to dislike a bit of "bondage"...... the chain is only pure gold...
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  #464  
Old 08-31-2009, 09:39 AM
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Scrumble Scrumble is offline
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Thanks Mas, Its a great rig, I look forward to more info/photos and/or XIT's rig too.

Love the idea of all furled sails. Are you considering Dyneema SK75 or similar instead of wire for the standing rig?

BTW thanks for the info on the little hatches, we will go to Whitworths online.

Regards, Tom
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  #465  
Old 08-31-2009, 05:19 PM
masalai masalai is offline
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I would like to Tom, but I am told too much stretch and does not like the "rubbing" or something of the "casing" of the reefing system???? There is a lot of refinement and development that could be considered and unless someone buys this boat at a good and fair price, this is my final boat, as more money is needed, than I have available, to think of another
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