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Old 07-24-2022, 03:34 PM   #121
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It seems the gauges were reading under by 150 rpm when the tech checked with his more accurate gear. Should be back in the water this week.
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Old 08-06-2022, 02:36 PM   #122
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Our first night on board out to Mayor Island. A few things to work on, no surprises there.
Overall super happy.
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Old 08-06-2022, 02:41 PM   #123
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Looks terrific, darkside! Worth the wait, I trust. Perhaps I missed the detail in previous posts, but apparently steering from the inside station is by way of a jog-lever, yes?
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Old 08-06-2022, 03:52 PM   #124
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There is a small wheel, but the centrally placed auto pilot will do most of the work.
Near docks I don't touch the wheel anyway.
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Old 08-06-2022, 04:00 PM   #125
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darkside, did you decide to leave the pitch as-is, in the end? If the tech's gear was reading under, the pitch must be nearly perfect. or perfect. Again, congratulations!
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Old 08-06-2022, 09:28 PM   #126
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Yep the pitch came down from 23.8" to 22"
Now hits 3450 on the rev counters which is actually 3300 rpm apparently.
Early days but fuel burn is 2.6l/nm at just under 20kn (in quite lumpy seas)
I think that is 1.46nm/g or thereabouts.

The graphs say if we slow to 15kn we should see 2l/nm.

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For those that are thinking of Starlink this is the speed test pic at 19kn.
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Old 08-06-2022, 09:35 PM   #127
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That is truly incredible fuel consumption. 15kn at 2 litres/nm will get you a long way; from memory our KAD-300s use 35 litres per hour EACH at 15kn (so Suu Kyi's consumption is 4.6 litres/nm).

Ahi is a brilliant boat, both in concept and execution. Wonderful.
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Old 08-06-2022, 09:50 PM   #128
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"Ahi" is indeed a great success story. I have quite taken by a few of Roger Hill's designs. In some ways prefer them to those of Malcom Tennant (who was sadly lost to the industry too soon). Both world leaders in cat designs IMO.

I would also like to "dip my lid" to your input into the outcome. Very well done. Enjoy!
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Old 08-06-2022, 10:03 PM   #129
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Well done indeed!
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Old 08-07-2022, 09:28 PM   #130
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Quote:
Originally Posted by darkside View Post
Early days but fuel burn is 2.6l/nm at just under 20kn (in quite lumpy seas)
I think that is 1.46nm/g or thereabouts.

The graphs say if we slow to 15kn we should see 2l/nm.
Absolutely fantastic! We're at 2.6l/nm at about 10kn and 2l/nm at 8 while much heavier and longer. Those are great figures in flat seas, let alone lumpy
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Old 08-07-2022, 11:29 PM   #131
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McArthur as you say you a shifting a fair bit more boat around than we are.
Also we have a perfectly clean hull, not much personal gear, although the tanks were all full.
As I said early days, it will take some more miles to get it accurate picture.
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Old 08-28-2022, 02:48 PM   #132
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We ran the delivery trip to our marina this weekend.
Around 135 miles for 340l of diesel or 2.5l/nm at 18-19kn the whole way.
Nice stop at Great Mercury island.
Really happy with the performance and ride.
Quite a bit of spray over the bow.
The keel bar is square edged and with the plumb bow a fair bit of spray is thrown.
We will narrow the leading edge and modify the small deflector the builder added.


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Old 08-28-2022, 03:49 PM   #133
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Truly excellent.
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Old 08-28-2022, 04:41 PM   #134
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Quote:
Originally Posted by darkside View Post
We ran the delivery trip to our marina this weekend.
Around 135 miles for 340l of diesel or 2.5l/nm at 18-19kn the whole way.
Gotta be happy with that
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Old 08-28-2022, 05:01 PM   #135
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Fantastic. That’s 1.5 nmpg. Very very good at 18-19kt!
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Old 08-28-2022, 09:06 PM   #136
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I like.
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