Subject: Re: [harryproa] Re:: Solar Electric Power
From: "Rick Willoughby rickwill@bigpond.net.au [harryproa]" <harryproa@yahoogroups.com.au>
Date: 1/11/2016, 5:20 PM
To: harryproa@yahoogroups.com.au
Reply-to:
harryproa@yahoogroups.com.au

 

On 12/01/2016, at 4:03 AM, "taladorwood@yahoo.com.au [harryproa]" <harryproa@yahoogroups.com.au> wrote:

Do you seriously think 1540N (2 hp) will drive a 60 foot, 5 ton boat at 10 knots into 20 knot winds?


This is such a mix of units I cannot hope to sort it out in an email.  Bjorn has taken on that difficult challenge.  I have tried and obviously failed to educate this fictional character..

A picture is worth a thousands words.  This is roughly what I claim you will need to get 10kts in a 5T boat pushing into 20kts of wind in 2m seas - something capable of 11.4kW continuous - this is rated at 13.2kW at 50Hz:







Take this as indicative - there are other possibilities that could be lower weight.  It would be reasonable to remove the fan and radiator and replace with a cooling plate on the hull.  

More technical detail:
http://www.prpower.com.au/wp-content/files_mf/1338865133013__GEP182__LEHF304305.pdf  

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Posted by: Rick Willoughby <rickwill@bigpond.net.au>
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