Subject: Re: : Re: [harryproa] Re:: Solar Electric Power
From: "Rick Willoughby rickwill@bigpond.net.au [harryproa]" <harryproa@yahoogroups.com.au>
Date: 1/11/2016, 7:26 PM
To: harryproa@yahoogroups.com.au
Reply-to:
harryproa@yahoogroups.com.au

 

On 12/01/2016, at 10:52 AM, "taladorwood@yahoo.com.au [harryproa]" <harryproa@yahoogroups.com.au> wrote:

My pig of a boat will do 7 to 8 knots at 20 hp in almost any kind of conditions.  More horsepower won't get me anymore speed though : (


Exactly - that is why it is a pig as a power boat.  It is lumbered with 9000lb to keep it upright because it has a huge stick that carries heaps of sail generating massive forces that are usually trying to tip it over.

Get rid of all that dead mass, reduce the beam of the immersed portion to 1m wide, add stabilisers to give it the beam and area to carry sufficient solar panels , a 26HP diesel with a generator low in the central hull, 600kg of batteries low in the central hull  THEN you no longer have a pig for motoring.  It will cruise at 8kts under solar/battery alone 24 hours a day every day of the year in balmy conditions. It will get you to safe harbour at 10kts in moderate conditions.  It will have a top speed in calm water of 15kts. 

There is nothing around that does all this as neatly as set out here but there are plenty of boats that are close.  By comparison rigid wings on a small boat in open water has challenges far beyond this - challenges that I can see no reasonable practical solution.    

__._,_.___
Posted by: Rick Willoughby <rickwill@bigpond.net.au>
Reply via web post • Reply to sender • Reply to group • Start a new topic • Messages in this topic (97)

.

__,_._,___