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Old 05-30-2014, 08:49 AM   #161
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Her best side.
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Old 05-30-2014, 11:31 PM   #162
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stern

That pot should be in the water!
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Old 05-31-2014, 07:37 AM   #163
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Originally Posted by MapisM View Post
Ops, yeah, now I see the hole on port side, in the last pic you posted.
Is it as effective as traditional external stern thrusters?
Also, it looks pretty close to the rudder shaft, doesn't that affect accessibility for maintenance?
Sorry for being yet again o/t, but I couldn't find a more specific thread on your new small ship...
Is there one somewhere, which I'm missing?
More on the boat build is here Building a Nordhavn and here MVTanglewood.com

I suspect the integral stern thruster is pretty much the same as a bolt on. The thrust direction isn't quite horizontal so there is some inefficiency there, but it's pretty darn close. Offsetting that is probably less drag from an external unit. How it all shakes out I'm not sure, but I suspect it's in the splitting-hairs category of issues.

Maintenance access isn't a problem. You can reach the blades up through the tunnel, and the inside gear (hydraulic motor and control value) are reasonably accessible too. It will take some gymnastics, but modest for a boat. I spent a lot of time laying out the gear in the laz to ensure optimum access since I'm the bilge rat who gets to climb in and do all the work. Most of the other boats I've been on have anywhere from a few devices to many devices that would be a bear to access and service, let along perform a significant repair. Some will tell, but so far I'm very pleased with how it all worked out.
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Old 05-31-2014, 10:45 AM   #164
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I wonder if that integral stern thruster tunnel will capture air while running in rough conditions, and hold it once dockside. Maybe thruster will eject the air and be fine, maybe prop will just splash around in the air void. Might need to rig up a vent. Won't know until you go through shakedown.
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Old 05-31-2014, 08:09 PM   #165
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I wonder if that integral stern thruster tunnel will capture air while running in rough conditions, and hold it once dockside. Maybe thruster will eject the air and be fine, maybe prop will just splash around in the air void. Might need to rig up a vent. Won't know until you go through shakedown.
There is a vent already built in. My understanding is that once initially bled, it tends to be fine, but I'm sure there are situations that will render it air locked again. For example, a diver working down there to change zincs or work on prop or clean the bottom will be blowing bubbles all over the place, and I could see them finding their way into the tube. Or, as you point out, appropriately heavy seas.
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Old 06-01-2014, 01:57 PM   #166
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More on the boat build is here Building a Nordhavn and here MVTanglewood.com
Very interesting reading, thanks for the link.

Re.the possibility of air getting trapped in the tunnel, just a thought:
By steering hard over and blasting the main prop forward, the water pressure on one side of the tunnel (port/stbd side, depending on whether steered to port/stbd respectively) should increase significantly, and I'd expect that to be more than enough to bleed any air trapped inside.
Of course, it's hard to tell for sure how effective such trick can be.
But it might be worth a try, because if it works, upon arrival after cruising it would be sufficient to routinely give a short blast forward while steered hard over, just in case, before maneuvering.
As I said, just a thought...
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Old 06-02-2014, 05:18 PM   #167
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Very interesting reading, thanks for the link.

Re.the possibility of air getting trapped in the tunnel, just a thought:
By steering hard over and blasting the main prop forward, the water pressure on one side of the tunnel (port/stbd side, depending on whether steered to port/stbd respectively) should increase significantly, and I'd expect that to be more than enough to bleed any air trapped inside.
Of course, it's hard to tell for sure how effective such trick can be.
But it might be worth a try, because if it works, upon arrival after cruising it would be sufficient to routinely give a short blast forward while steered hard over, just in case, before maneuvering.
As I said, just a thought...
It might, but just opening the vent valve seems pretty easy to me.
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Old 06-02-2014, 06:08 PM   #168
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It might, but just opening the vent valve seems pretty easy to me.
LOL, yeah, I guess so.
Otoh, you said that it's supposed to be unnecessary once initially bled, so I figured that the valve had to be handled somewhere near the thruster.
Of course, if you can open it from the helm, that's definitely easier!
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Old 06-02-2014, 06:15 PM   #169
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LOL, yeah, I guess so.
Otoh, you said that it's supposed to be unnecessary once initially bled, so I figured that the valve had to be handled somewhere near the thruster.
Of course, if you can open it from the helm, that's definitely easier!
The valve is down in the Laz, so perhaps bat-turns will prove to be easier. I'll just have to see how it works in practice and will try to remember to report back on it.
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Old 02-25-2017, 01:38 PM   #170
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Wittholz canoe stern. Unconventional for its day but still looks good.

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Old 02-25-2017, 03:46 PM   #171
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Wittholz canoe stern. Unconventional for its day but still looks good.
Nice !
I like "big bottom girl" , nothing naughty here, just a U.K. frequently-used expression for this style of stern.
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Old 02-25-2017, 05:33 PM   #172
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REAL MOUNTIE 1986 Pilgrim 40 Fantail Stern

Pictures taken in July 2016 while anchored in front of Fort Ticonderoga Lake Champlain NY on our Erie Canal exploration.
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Old 02-25-2017, 06:20 PM   #173
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Here's Red Head's stern and another picture showing one of the sterns fold down features...
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Old 02-25-2017, 06:27 PM   #174
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Old 02-25-2017, 08:26 PM   #175
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Oct 2016
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Old 02-25-2017, 08:51 PM   #176
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BD,
Beautiful.
I've been on that ramp and lift.
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Old 02-25-2017, 08:56 PM   #177
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Ah, yes...very cool!
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Old 02-25-2017, 09:07 PM   #178
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In the slings
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Old 02-25-2017, 09:32 PM   #179
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On the pond and In the slings....

Willard 36 Motorsailer on top, just like all 36 Willards underneath.

1963 Willard 36MS. Hull 23
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Old 02-25-2017, 11:12 PM   #180
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Is that the five blade Michigan Star wheel?
I've got one but my engine was too small to turn it. 2000rpm WOT.
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