Subject: Re: [harryproa] Re: Dragging a prop
From: "Rick Willoughby rickwill@bigpond.net.au [harryproa]" <harryproa@yahoogroups.com.au>
Date: 7/24/2019, 5:10 AM
To: "harryproa@yahoogroups.com.au" <harryproa@yahoogroups.com.au>
Reply-to:
harryproa@yahoogroups.com.au

 

Unless you are looking beyond a 10 year horizon for your HP there is not going to be anything beyond what is proven now.  There is nothing in electric storage technology that comes anywhere close to diesel for specific energy density even when burnt in a diesel.  


As I stated earlier,  I believe batteries are suitable for day sailing.  I will add that they could be suitable for short cruising in safe waters at selected times. There are a good way to start out. 

On the other hand the cost and weight of a generator and fuel required to motor for a day or so if needed would make sailing more enjoyable by avoiding the range anxiety opf relying on batteries and various ambient energy methods of charging them.  

My diesel car will do 1000km on a tank of fuel but I usually fill up before the fuel warning light comes on tells me I have 70km left.  Having a battery that enables 2 hours of sedate motoring or 1 hour of making way into a headwind continually gave me the same feeling I have in my car when the fuel warning light is on.

Rick
On 24 Jul 2019, at 1:41 pm, '.' eruttan@yahoo.com [harryproa] <harryproa@yahoogroups.com.au> wrote:

I agree. But the gap is closing and fast. As I eye the time to decide the power system for my boat, and the closing gap, I am pretty sure the gap will be well closed before I must decide.

But I am often wrong.

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