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Old 05-18-2020, 07:47 PM   #281
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Thanks! I looked at those yesterday and they seem to be for European and Japanese doors. That would be the perfect solution if they hadn't already cut the holes for american knobs.

I'll figure something out. I think I'll start by just making my own knobs.. It just starts getting frustrating when people dont use their heads. I think having a boat built by craftsmen in Maine spoiled me.
The one pictured uses inches so may be adaptable to your doors.
I would order them and return 'em if you can't get them to fit.
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Old 05-30-2020, 07:04 AM   #282
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I'm in construction, and the final punch list is really hard on both sides. It is at the end, and everyone is burned out in a variety of ways. Just don't forget that it represents just the last couple of percent of time and money and so worth getting it as right as you can as those are the things that you will probably notice every day...
I'm sorry, but I didn't see this comment when you posted it. You are spot on with it. The frustration of a year long delay and transition to a new contractor has pegged out my fun-meter. I genuinely like the guys I'm working with, but they are getting as ready to get this over with as I am. As you say, the details at this point make a big difference, but a person looks really petty and picky when you are at the stage of bitching about door knobs. However, I really appreciate that I can pick up the phone and talk to the owner of the company and have an honest discussion. That's worth a lot!

We had a little hiccup with some electronics (I understand the original builder purchased some incorrect gear which we discovered when calibrating the auto pilot) but after replacing the pump and some black boxes, I am told that's been corrected and the remainder of the punch list is complete. So I'm heading down tomorrow with the intention of doing final acceptance.

Today marks the 1 year anniversary of the original launch date. Oh...and if there is a named storm forming, please dont tell me!
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Old 06-09-2020, 02:39 PM   #283
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Checking In

I hope you are off enjoying your boat and don't have time to update the forum thread, but can't help but ask if everything is going ok and how you are enjoying the boat. A little more selfishly, I'm interested in your approximate fuel burn at slower speeds, like the 7-knot range, and maybe at the 10-knot range. Best wishes for the enjoyment of your amazing new boat!!!
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Old 06-09-2020, 02:55 PM   #284
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Huck, quit screwing with me. I'm sitting here drinking a beer and half way through delivery! Can't a guy get a break?

No, actually I appreciate the interest. She's running great and no material issues. I've got a bunch of cryptic fuel burn info and will process all of it when I sit down. But I'll be sure to capture the specific numbers you asked for.

I'm in Coinjock, NC right now and will be home in two days. I haven't had any weather to speak of, so no reports on heavy weather handling.
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Old 06-10-2020, 07:15 AM   #285
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Great to hear you are on the home stretch to the starting line. Congratulations.


What would be awesome to see is a plot showing fuel burn rate and speed across your operating RPM range in 100-200 rpm increments. That gives a plot of your operating performance across the boat's full range. And from that you can calculate NMPG and range for each operating point.


This data is really useful to have for any boat so you can select the speed, total fuel, and range trade-off that you want for any particular voyage.
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Old 06-10-2020, 07:19 PM   #286
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Agree with Tanglewood - and then I can add you to my powercat efficiency page . I need to update it anyway as I have lots more data now...
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Old 06-12-2020, 07:29 AM   #287
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Progress pics for 43 x 16 semi-displacement trawler. House gets attached next and engines will be installed in 3-4 weeks. Expected splash date is early to mid August.
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Old 06-22-2020, 09:56 AM   #288
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Sorry for the delay. I've been busy making holes in the water.

Here are some general data points on fuel. Most of these are composite numbers from several data points and under various conditions and loads - so they are precisely wrong. I did most of my recording when tanks were between 50% and 75% full.

I didn't waste a lot of time recording much information in the 1500 to 2000 RPM range because she's a complete dog in that range. That's around 8.5 to 11 knots and she throws a ginormous wake. But below that she behaves well and from just over 2000 RPM on up to WOT up she's pretty consistent on NMPG.

600 RPM - 4.22 knots - 7.03 NMPG
1160 RPM - 7.54 knots - 3.59 NMPG
1310 RPM - 7.8 knots - 2.52 NMPG
1800 RPM - 8.47 knots - .82 NMPG
2000 RPM - 12.16 knots - 1.0 NMPG
2100 RPM - 14.97 knots - 1.17 NMPG
2200 RPM - 15.6 knots - 1.12 NMPG
2300 RPM - 17.5 knots - 1.11 NMPG

It seems her sweet spot is just above 7.5 knots for slow cruise and anything between 13 knots and WOT for fast cruise. If these numbers seem really off just let me know and I can make up some better ones.

My delivery was wholly uneventful (if you don't count the lousy prime rib in Coinjock), so I can't say how she'll handle adverse weather conditions. The worst we saw was 3' following seas on the Chesapeake and those were a non-issue. If anyone is curious about how she handles adverse weather, give me a little time then PM me - I'll let you know.
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Old 06-22-2020, 02:55 PM   #289
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Great Info- Thanks for posting

You have an amazing boat! I hope you can really settle in to enjoy it now. Thanks for posting those numbers, they are really helpful. I might be missing something, but am I correct that this would be considered a semi-planing hull? The way I'm seeing it is that once you get up to 7-8 knots, you are pushing a decent size bow-wave and are in a pretty big hole (getting a bit under 1nmpg), but at 12-13 knots, it gets back on top a little (getting some lift and starting to plane?) as it jumps back up to over 1 nmpg? I'm really good at looking at data and drawing the wrong conclusions... :-)
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Old 06-22-2020, 04:41 PM   #290
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Thanks for the numbers. It behaves much like my Grand Banks which was a planing hull model. Once it was on plane, the NMPG was nearly constant regardless of how fast you went. It did continue to drop a bit as you went faster, but only by maybe 10%. I reached the same conclusion you did, which go slow, or let 'er rip.
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Old 06-22-2020, 05:18 PM   #291
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Originally Posted by Bkay View Post
Sorry for the delay. I've been busy making holes in the water.

Here are some general data points on fuel. Most of these are composite numbers from several data points and under various conditions and loads - so they are precisely wrong. I did most of my recording when tanks were between 50% and 75% full.

I didn't waste a lot of time recording much information in the 1500 to 2000 RPM range because she's a complete dog in that range. That's around 8.5 to 11 knots and she throws a ginormous wake. But below that she behaves well and from just over 2000 RPM on up to WOT up she's pretty consistent on NMPG.

600 RPM - 4.22 knots - 7.03 NMPG
1160 RPM - 7.54 knots - 3.59 NMPG
1310 RPM - 7.8 knots - 2.52 NMPG
1800 RPM - 8.47 knots - .82 NMPG
2000 RPM - 12.16 knots - 1.0 NMPG
2100 RPM - 14.97 knots - 1.17 NMPG
2200 RPM - 15.6 knots - 1.12 NMPG
2300 RPM - 17.5 knots - 1.11 NMPG

It seems her sweet spot is just above 7.5 knots for slow cruise and anything between 13 knots and WOT for fast cruise. If these numbers seem really off just let me know and I can make up some better ones.
My delivery was wholly uneventful (if you don't count the lousy prime rib in Coinjock),
No need for you to take the trouble to make up better ones. Here on TF we have more than one statistical genius. You can find some of them on the covid sub-forum.
They are so good that they could get you creating fuel rather than consuming it! Well, at least creating hot air and BS which a kinda like fuel.
Ok, I can't even blame having a bad steak for those remarks because our restaurants are still mostly shut!

Nice boat, excellent performance and well done for getting it all finished despite some drama along the way.
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Old 06-22-2020, 08:55 PM   #292
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If you had said the prime rib in Coinjock was better than poor, I would have been surprised. Probably the most consistently poor meal that people mention on TF.

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Old 06-22-2020, 11:44 PM   #293
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Sorry for the delay. I've been busy making holes in the water.

Here are some general data points on fuel. Most of these are composite numbers from several data points and under various conditions and loads - so they are precisely wrong. I did most of my recording when tanks were between 50% and 75% full.
Love to hear any more on different weather - I love statistics . When I get to our boat, I'd love to compare (our 50' aluminium power cat).

Do you have any idea of displacement - what the 50% or 75% actually means in pounds (or for those out of the 18th century - kilograms )?
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Old 06-23-2020, 12:40 AM   #294
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Also do you know your BWL (beam at waterline)? ie. the widest part of one hull at the waterline).
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Old 06-23-2020, 06:53 AM   #295
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...I might be missing something, but am I correct that this would be considered a semi-planing hull? The way I'm seeing it is that once you get up to 7-8 knots, you are pushing a decent size bow-wave and are in a pretty big hole (getting a bit under 1nmpg), but at 12-13 knots, it gets back on top a little (getting some lift and starting to plane?) as it jumps back up to over 1 nmpg? I'm really good at looking at data and drawing the wrong conclusions... :-)
I'd say you nailed it. Around 8 knots the nose comes up and the arse goes down. The best strategy seems to be to simply put the throttle all the way down and when the nose starts to drop and she's in a fairly level trim, then I can back off the throttle and pick the speed I want to travel at. As long as the bow doesn't start climbing back up, I'm fine.

Oh, and regarding the semi-planing - since I have two hulls, I made one semi-planing and the other semi-displacement just to see how it handled. Sorry, that joke never gets old!
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Old 06-23-2020, 07:12 AM   #296
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Do you have any idea of displacement - what the 50% or 75% actually means in pounds (or for those out of the 18th century - kilograms )?
I just sent the NA some measurements so he can calculate the "as built" displacement. I seem to recall the "as designed" was around 25,000 lbs - but I hope she came out lighter than that. The scales on the travel lift didn't work (and those are usually not that accurate anyway), so if I can get the designer to calculate it based on underwater volume, that would be the most accurate measure.

Also, I have the demi-hull waterline beam calculated from the original plans, but I don't remember the number off the top of my head and I'm away from my house right now. I'll dig that up and let you know.
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Old 06-27-2020, 08:16 PM   #297
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Dude. Thatís an awesome shot of your boat. Congrats on the success!

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Old 06-29-2020, 07:29 AM   #298
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Dude. Thatís an awesome shot of your boat. Congrats on the success!

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Thank you. I went out with the neighbors in a chase boat for a "photo shoot". Now I just have to figure out how to get pictures and video off their camera and onto mine. I've got my wife on the case - someday I'll see the rest of the pics.
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Old Yesterday, 03:56 PM   #299
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Also do you know your BWL (beam at waterline)? ie. the widest part of one hull at the waterline).
Mcarthur,
Sorry, I neglected to answer this. Waterline beam for each hull is approximately 48". I calculated that from the plan, so its an approximate number, but pretty close.

Still waiting on an as built calculated displacement.
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Old Yesterday, 04:00 PM   #300
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Mcarthur,
Sorry, I neglected to answer this. Waterline beam for each hull is approximately 48". I calculated that from the plan, so its an approximate number, but pretty close.

Still waiting on an as built calculated displacement.
Whoops, didn't look closely at my notes. Overall demi hull beam is 48", but beam at designed waterline is 44".

Sorry.
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