The 10 tonnes was an estimate based on scaling up the smaller boats, an uncored laminate and the fitout and safety gear required for commercial use. The lower weight includes cored laminates and changing the layout from the "cruise ship with 3 day voyages" end of things to more like "Greyhound bus, daylight only", which showed just how much "fit out" adds to the cost and weight. This allowed smaller hulls, rigs, beams and rudders and down the spiral we went. 6 tonnes is no more set in stone than the 10 was, until we finalise the use and get the survey organisations involved, which is interesting, as they do not get a lot of requests to certify commercial proas.
There has been a lot of interest in these boats from people I have not formerly dealt with (NGO's, Govt organisations, a wide range of academics, local politicians, shipping companies, charities, large donors, etc) who mostly (some of the shipping companies have been wary) agree that the harryproa is the solution. What they have in common is an understandable desire to dot every i and cross every t, and the reams of paperwork this involves. Not just about the boat and it's construction, but about how it will impact everything from the villagers and the shipping companies down to the local markets. As it is unique, the effects are difficult to quantify.
This week the International Maritime Organisation has pledged to cut shipping emissions by 50% by 2050 which might turbocharge the development of commercial sailing boats for remote villages, which is one of the areas we are looking at..
It will be the longest recent proa, but I suspect there have been longer traditional ones.
On Sun, Apr 15, 2018 at 11:47 PM, lucjdekeyser@telenet.be [harryproa] <harryproa@yahoogroups.com.au> wrote:
"On the 24m/80' cargo ferry (which has been simplified down to 6 tonnes/tons empty) it saves almost 200 kgs and a couple of hundred hours of fiddly work, resulting in a system which is easier to operate than anything previous. I am in the throes of making a model to check that everything behaves as it should. "
The original concept drawing notes's weight estimate was 10 tons. It was already simple. How simpler can a HP get to save 40% in weight knowing that the newest rudders "only" save 200 kg ?
If this boat were build, this would become the longest proa, as far as I know, surpassing 71' Gaia's Dream.
__._,_.___
Posted by: Rob Denney <harryproa@gmail.com>
| Reply via web post | • | Reply to sender | • | Reply to group | • | Start a new topic | • | Messages in this topic (2) |
.