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KazRob View Drop Down
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Posts: 245 		Post Options Post Options   Quote KazRob Quote  Post ReplyReply Direct Link To This Post Topic: carbon fibre from plants?
    Posted: 16 Jan 18 at 7:04pm
[/QUOTE]
In my view there's defiantly a market for someone to provide a single point of purchase for responsibly sourced timber and eco boat building materials.
[/QUOTE]

It's not a new idea (Dave Rose has been building world beating OKs this way for decades), but a ply/foam/ply sandwich can build a very stiff structure and I guess an opportunity to use thinner skins to get weight down without sacrificing performance or keep them thicker and have a long competitive life.
Of course we wont mention the processing and glue needed to make ply in the first place....
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Riv View Drop Down
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Posts: 353 		Post Options Post Options   Quote Riv Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jan 18 at 7:58pm
Just out of interest:

Authors:
Majasuo, Susanna1
Liippo, Jussi1
Lammintausta, Kaija1
Source:
Contact Dermatitis (01051873). Mar2012, Vol. 66 Issue 3, p148-153. 6p.
Document Type:
Article
Subject Terms:
*SKIN inflammation
*PATIENTS
*EPOXY resins
*BISPHENOL A
*TRANSFER factor (Immunology)
*OCCUPATIONAL diseases
NAICS/Industry Codes:
325210 Resin and synthetic rubber manufacturing
325211 Plastics Material and Resin Manufacturing
Abstract:
Background. Sensitization to epoxy resins often results from occupational exposure in various fields of construction and industry. Non-occupational sensitization sources and environments have remained overlooked. Objectives. To analyse non-occupational and occupational contact sensitization to epoxy resin of bisphenol A among general dermatology patients. Special attention was paid to patients sensitized from non-occupational sources. Patients and methods. During a 10-year period, 6042 general dermatology patients were patch tested with epoxy resin (bisphenol A) in the Dermatology Clinic of Turku University Hospital. The clinical data and the sources of occupational and non-occupational exposure to epoxy resin were analysed in sensitized patients. Results. Epoxy resin sensitization was found in 59 patients. Non-occupational sensitization was found in 21 (35%) patients, whereas the number of occupational cases was 38 (65%). The most common sources of non-occupational epoxy resin sensitization were materials used in domestic renovation and construction projects and in boat repair. Conclusions. Non-occupational sensitization sources account for approximately one-third of epoxy resin sensitization cases, and therefore represent an important risk among hobbies and leisure activities

The red highlight is mine.

The problem with modern boat building chemicals for me is that I hate the stink and the mess and the waste! I can't even burn wood that comes off boats from the 60's as they have styrene resin on them.
I have an old Mirror that I'd like to burn next bonfire night but won't as the fumes would be really toxic, so much for chemical wood boats. (I'll have to saw it up and take it to the tip where it will end up in chipboard)
Maybe I'm just sensitive to all of the resins but they are all vile and I wouldn't want any of my kids working with them.
Maybe we are entering the end of the non recyclable plastics age now? Blue Planet and Whales eating plastic.....
I had a vision of  Cockroach archaeologists after the next global meltdown digging down and finding the 20th Century plastic stratum millions of years in the future Smile
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piglet View Drop Down
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Posts: 514 		Post Options Post Options   Quote piglet Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jan 18 at 6:48am
Armacell is a structural foam from 100% recycled PET (bottles)
It works well and is cost competitive with other cores.
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Guests View Drop Down
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Post Options Post Options   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jan 18 at 2:50pm
One of RS teaser videos for the RS21 launch is eco focused. 

First time I've seen that even mentioned as a selling point for a small racing boat, let alone be  a key selling point which warrants it's own advertising material. 
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Sam.Spoons View Drop Down
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Posts: 3401 		Post Options Post Options   Quote Sam.Spoons Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jan 18 at 3:28pm
One way to reduce the eco footprint of our sport would be to STOP MAKING SO BL00DY MANY NEW BOATS. Most of the Class Associations are keen to point out how competitive older boats can be and how you don't need a new boat to win the Nationals or WHY   Clown Clown Clown
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chris_wht View Drop Down
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Posts: 50 		Post Options Post Options   Quote chris_wht Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jan 18 at 10:28am
Originally posted by Sam.Spoons

One way to reduce the eco footprint of our sport would be to STOP MAKING SO BL00DY MANY NEW BOATS. Most of the Class Associations are keen to point out how competitive older boats can be and how you don't need a new boat to win the Nationals or WHY   Clown Clown Clown


bit like manufacturers making and selling brand new electric ''eco'' cars rather than manufacturing and selling electric motor conversions for existing models...just isnt as fashionable or easily marketable with a fancy instagram filter and a pcp deal.  

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Jack Sparrow View Drop Down
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Posts: 2965 		Post Options Post Options   Quote Jack Sparrow Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jan 18 at 11:35am
Originally posted by Sam.Spoons

One way to reduce the eco footprint of our sport would be to STOP MAKING SO BL00DY MANY NEW BOATS. Most of the Class Associations are keen to point out how competitive older boats can be and how you don't need a new boat to win the Nationals or WHY   Clown Clown Clown

Slightly different thread needed for this but. For a Class to be successful, i.e grow in size and improve the competitive element of the class, they NEED boat churn. Because the majority of owners do actually own a old, older, really old boat. But to grow you need new boats coming in at the top.

You could leverage your argument at the over servicing of the saturated dinghy sailing market. We have to many Classes that do the same thing. But all objects that race - cars, planes, bikes and sail boats wear out and need replacing. Because winning is about small percentages. Finding the most eco way of doing this is surly a very important thing.
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Sam.Spoons View Drop Down
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Posts: 3401 		Post Options Post Options   Quote Sam.Spoons Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jan 18 at 2:11pm
TBF I was trying, with tongue slightly in cheek, to engender some activity at the cat/pigeon interface.....  Tongue
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Riv View Drop Down
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Posts: 353 		Post Options Post Options   Quote Riv Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jan 18 at 4:06pm
Yes, all things that race wear out and need replacing, however because plastic boats of all materials are unitary you can't easily replace parts of the hull.

If a dinghy hull coulb be made to easily disassemble then it could be kept going for much longer. The manufacturer would supply parts as well as complete hull units. It would be a different business model.
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Sam.Spoons View Drop Down
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Posts: 3401 		Post Options Post Options   Quote Sam.Spoons Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jan 18 at 5:42pm
I'd have thought most epoxy/foam sandwich hulls will remain competitive for a considerable time (possibly almost indefinitely as long as they remain undamaged), unlike polyester boats which take up water and/or go soft as the resin deteriorates and wooden boats which, unless well cared for and kept put of the weather when not being sailed, just deteriorate with time (and, given good care plywood boats probably have a longer potential life than GRP).

Rigs and sails can be easily updated and replaced
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