Thanks. Richard Jenkins is a long time hero of mine.
The operating side of things is sorted. The cargo ferry will operate using little or no fossil fuel as it can sail in winds as low as 6 knots, will be solar powered when the sun is out and will not operate on routes where timetabling is strict (ie, no tourists or perishable cargo) so if there is no wind at night, it does not move. This is an unlikely scenario, particularly for the first one which will be operating on a trade wind route, mostly in daylight.
Compare this with the diesel guzzling freighters. Up to 60% of their income is spent on fuel, most of the rest on wages, leaving nothing for maintenance, which is why there are so many derelicts ships waiting to sink in the main harbours.
What I would like to discover is how the materials themselves compare, including production, the build process, maintenance, life expectancy and what happens at the end of their useful life. Then divide the answer by how many tonnes of cargo are carried how far by each vessel. The result may or may not be in favour of the cargo ferry, it will be interesting to see. It will probably end up as a university student's third year project, but experience has shown that it is better to have done the literature search before approaching them. Experience has also shown that there is not much you guys don't know, so you are my first stop.
The ply information is interesting, I will call ozbuild tomorrow and see if they have any comparative numbrs for other materials and/or more numbers for wood than the heavily biased carbon released/stored numbers.
On Mon, Jun 25, 2018 at 6:54 PM, realink@iprimus.com.au [harryproa] <harryproa@yahoogroups.com.au> wrote:
If theyre looking for a holistic analysis Id avoid that, as that would include the build of the boat. What you could give them is the footprint in the operation of the boat vs some existing propositions that deal with similar use in terms of passengers and freight, you would be examining fuel consumption and the cost of crewing.Of course you would have to factor in some rubber figures for windless days etc, limitations for sea state and weather that are the normal sphere of operation. Its kinda tough because you wont be aware what they are using now or how often, and you wont be familiar with their local weather patterns. Some research might fill those blanks in though. Dont leave out maintenance because that would be in your favor.The more you find out about whats happening for them now, the more you will be able to favorably colour in the complimentary specifics of your own design. Dont be too unhappy with yourself if your proposal seems too rosy, marine operations are expensive and often involve questionable aspects such as antifouling.Maybe this video will give you a few ideas, or just some place to start. Although it says ep 3 I havent had any luck finding earlier versions
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Posted by: Rob Denney <harryproa@gmail.com>
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