Bruce Roberts International
Email : office@bruceroberts.com.au
Web site : www.bruceroberts.com.au
 
Hi,

Welcome to our monthly Newsletter. This month you will find :

1.  OFFICE NEWS.
2.  ADDITIONS TO THE WEB PAGES
3.  CARTOON SECTION.
4.  CURRENT SPECIALS.
5.  QUESTIONS ANSWERED.
 

1.   OFFICE NEWS

Visitors and activities over the past month have made the month fly by. First we were honoured to have a visit Rolf and Deborah off 'Northern Lights', well know to cruisers in Rolfs home area of Scandinavia, and recipricants of the Blue Water Cruising Medal in 1984 for their cruise from 80 deg north to 75 deg south. Their book 'Northern Lights' has some of the most spectacular cruising photography ever. Although not a Roberts design, their boat was built by META in France in 1972 and is the perfect example of how a steel boat will last with a caring owner. It is still in perfect condition. Another visitor was one of the principles of Edensaw, the speciality timber suppliers in the North West, USA. Charlie is cruising with his family along the East Coast of Australia. At the end of the month we took part in a one day Spray regatta on Morton Bay. Starting at 7.30 am and finishing a 11.00 pm it was a hugely successful day. We have posted some shots of the boats and the sailing. Once again I was criticised by my other half for only taking pictures of boats and not the participants.
2.    ADDITIONS TO THE WEB PAGES
 
This month we have added pictures of a steel Coastworker 30 full displacement vessel which was launched in May. This is a truly great looking job and a credit to the builder. We also added a page of pictures of the Spray Regatta as mentioned above. I am sorry but you will all have to wait a little longer to see shots of the WR 40 and the WR 44 on sea trials as our video capture card has collapsed which is the equipment that takes digital still shots off of analogue video's. Also, photo's of the pram dinghy, full size patterns of which come with every set of plans sold, have been added to the top of the sailing section.
 

3.    COMEDY SECTION
                                                                       

4.    MONTHLY SPECIALS
 
Specials this month are the study plans and/or full plans and patterns for the Waverunner 44. Detailed plans come for this design to be built in either steel, fibreglass or wood epoxy. 
Our book special this month is 'Seaworthiness. The Forgotten Factor' =. This is an important subject for all those contemplating building a sailing vessel. More information on both these specials is available on our Specials page.


5.   QUESTIONS ANSWERED.

 Following are a few answers to questions that have been asked throughout the month that may be of interest. These also show the type and scope of the questions we are asked each month and this is what we are here for. Not only to answer questions directly but to encourage and help in any way we can.
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The following email was kindly sent by Jim who is building a radius chine R 345 in Australia. The prices quoted are in Australian dollars.
 
Dear Phil;

Just a quick run down on costs of materials to date  for Roberts 345 for anybody interested:

1st steel order
(includes frame,solid webs, strongback, bracing, longitudinals)           $ 800
Forming (5 frame circles @ $30 each. For radius section framing)     $ 150
2nd steel order
(includes 3mm plate, 6mm plate)                                                            $2000
Forming(8 3mm x 1200 x 2400 @ $30. For radius section plating)     $ 320
Sandblasting/priming (plate/longitudinals @ $11.50/m                       $1900
Primer/thinner(altex 504 @13.00/ltr)                                                        $ 550

Total                                                                                                            $5770

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Advising on timber varieties and grades is one of the hardest things that we do and often we cannot give a categorical answer. Jarrah is a timber that occurs in one particular spots in the world, the extreme South West corner of Western Australia. The problem is that there are hundreds of such areas growing a particular species through out this world that it is nearly imposable to know them all. The best advise is that when building a vessel with a local timber look at other vessels in the area, ask local boatbuilders and timber merchants and check where they have used the timber. We do help where we can and do have some knowledge of many timbers outside the normal, common, worldwide boatbuilding timber species but not  by any means all of them.
 
Dear Sir,

I recently purchased a copy of the plans for a wood/epoxy version
of the Wave Runner 24 model (Plan no. 24/188). I have finished the
strongback and are about to start on the frames. I was hoping that you would
be able to help me out with the following questions;

1) Is jarrah a suitable building material for frames? It is not
mentioned in the 'Timber for boat building' sheet sent with the plans. Is
this wood also compatible with WEST system epoxy resin?
2) Much of the timber that is mentioned in the suitable 'timbers for
boat building' sheet are available as RECYCLED wood ie. often machined into
new sizes etc. Assuming this wood has the correct moisture content would it
be suitable for boat building or has its previous uses likely to have
already caused significant fatigue etc.?
3) The cheapest source of marine ply (for the skin, transom etc.) that
I have found is hoop pine AA-A bond to AS2272, made by Pearsons Plywood and
Panel Products. Is this suitable and do you have any knowledge of the
quality of this companies products?

Thanks for your time.

Regards        Mick

Dear Mick,

Good to hear that you have started.

1) There is no problems with Jarrah as frames. It is not an easy wood to
work and does blunt tools. It is also heavy and very prone to warping. It does
have excellent rot resistance which is why once upon a time all the full displacement Cray
boats in WA were planked in this wood before the industry moved onto high speed alloy
vessels. I do not know how suitable it is when used with WEST system
epoxies. The WA forestry Department will most likely have information on
this as well as other species unique to the south west of WA.
2) There is no problems with using recycled timbers and in many cases they
are preferred due to their aging. A visual check for splitting or rot of any description should
be undertaken when purchasing second hand lumber just as it should when purchasing new lengths.
3) I do not have any knowledge of the company 'Pearsons Plywood and Panel
Products' however your description of the ply grade indicates that you should be
able to use it for all applications in the building of your WR 24.

Yours            Phil
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Hi Folks! 

      I received my study plans for the Tom Thumb 26' . Can you tell me what alloy is specified for steel construction? I' m trying to begin costing the hull construction based on the bill of materials in the study plans.
      Also, do you have any feed-back from other builders on their cost to build the hull? 
 
Best Regards,   Dennis 
                                                                              
Dear Dennis,
 
Any low carbon mild steel would be suitable for building the Tom Thumb 26. This is the type of steel most commonly found at all steel suppliers. The grades AISI-SAE1010 through to 1023 are all suitable and are available everywhere. There are two special grades of carbon steel which are used for boats when built to specific society Classification requirements (e.g. Lloyds A1+, etc). IN the USA these are ABS (American Bureau of Shipping) grade A steel and ASTM A36. These two steels grades are generally not available off the shelf unless you were in a large steel boatbuilding area and for normal owner builder use, the AISI-SAE grade steel mentioned above is perfectly acceptable for the TT26
 
Yours        Phil


 
Well that's all for another month.
 
Yours            Phil

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