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Thread: Aus equivalent to Euro oak
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18th May 2017, 06:32 AM #16GOLD MEMBER
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The actual issue with spotty isnt its bending characteristics, elasticity, or anything else but weight. Boat designs - particularly little ones - are often very sensitive to the weight of the material being used, which has resultant effects on stability, CG, amount of freeboard etc etc.
Doesnt mean it can't be done in Spotty but you need to figure in what that extra 300kg/m3 of weight adds up to and what its going to mean to you: does it mean more lead in her bilges, or perhaps lift her one plank higher or whatever. Some boat designs are more sensitive to weight changes then others too.
How big is the girl? Will she live on a mooring or in a shed on a trailer and only get her ass wet on weekends? Purists may mock but theres a lot of non traditional, non durable timbers suitable for boat building that will do just fine with modern coatings and when they spend their life mostly on dry land.
If shes going to be living in the water then -so sorry - but you'll need to use suitably durable marine timbers. Expect to pay $ -and theres far more of them out there then just huon and spotty. Spottys okay if you're building a prawn trawler IMHO. The cheap alternative is to rip certified marine ply into strips and go that way. Make sure its certified - a lot of "marine ply" isnt suitable for marine use anymore.
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18th May 2017 06:32 AM # ADSGoogle Adsense Advertisement
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18th May 2017, 07:21 AM #17GOLD MEMBER
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Have you actually looked into using real Euro oak? I use it quite often , it gets delivered to my door by the client I make things from it for. I am surprised by the width and thickness of the boards that get dropped off here (availability wise). My client gets it sent down from the north island so I am guessing the supplier is in Melbourne or Sydney. Can find out if you like?. At this stage I do not know anything about it's pricing however Aussie hardwoods don't seem to come cheap so it might be worth considering the real thing.
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18th May 2017, 09:28 AM #18GOLD MEMBER
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Certainly an option worth exploring. The issue withit i that boat building timbers have certain characteristics around grain features and orientation - rift sawn straight grain no knots consistent density - that are important. You basically got to select them yourself or have someone who knows do it.
White Beech would be great Calantis also Philippines Mahogany huon kauri all in the density range and accepted for application.
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18th May 2017, 11:43 AM #19Senior Member
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Mate...don't get me into firing cannon balls at something...
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18th May 2017, 11:47 AM #20Senior Member
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18th May 2017, 02:20 PM #21GOLD MEMBER
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this thread may help
boatbuilding woods
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18th May 2017, 02:49 PM #22GOLD MEMBER
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Having worked extensively with both Oak and Spotty I beg to differ re the massive difference in their respective published properties. In a working situation they are quite comparable. Both timbers vary widely in weight, dependent on maturity etc.
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18th May 2017, 02:53 PM #23GOLD MEMBER
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20th May 2017, 07:40 PM #24
Way back in the days of commercial sail, Tasmania had a major industry building large ships with two, three or four masts, commonly referred to as blue gum clippers. The preferred building materials were:
- Framing - spotted gum,
- Planking - Tasmanian blue gum (e globulus),
- Decking - celery top pine.
The Maritime Museum of Tasmania has a small coasting ketch, the May Queen, on display in Constitution Dock, Hobart. She was built in 1867 from the above materials and is 21 metres long.
Fair Winds
Graeme
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