"Kahu" Refloating

[Firefly625]

Well, this pretty much depends on where you set the "properly" bar.
If it's survival in every conceivable event that you're after, then there are steel trawlers where the wing engine is also located in a utility room, separated by the main e/r through a fire and waterproof door.
Aside from having everything else separate, as you point out, this solution grants that the wing engine can still run even in the event that the main e/r is completely disabled by a catastrophic fire, and possibly also flooded.
I've never seen that in any Nordhavn.
Of course, being built in grp, a Nordhavn is unlikely to stay afloat in the event of a catastrophic e/r fire anyway, so I suppose they might argue that such layout would be pointless...

But nordhavn's don't tend to just catch fire, so you are talking hypothetically of course.

 

[MapisM]

Well, I wasn't suggesting that Nordhavns as such are prone to catch fire, but fire remains the most dangerous risk on any mobo.
More so if you are half way in an ocean crossing, for obvious reasons.
And steel is unquestionably better than plastic, if and when a fire develops.

 

[Firefly625]

Well, I wasn't suggesting that Nordhavns as such are prone to catch fire, but fire remains the most dangerous risk on any mobo.
More so if you are half way in an ocean crossing, for obvious reasons.
And steel is unquestionably better than plastic, if and when a fire develops.

Indeed, I'm being tricky. However these boats as you say do ocean crossings regularly, fire half way across an ocean is a killer.

 

[Ian h]

As I understand, you posted this in reply to my "never on Nordhavns" comment, but actually I was referring to the rather peculiar solution of an electric motor, powered by a big genset and coupled to the main shaft.
A wing small diesel with its own (sometimes foldable) prop is indeed more common, and afaik it's what they fit on single screw Nordhavns.
I was just wondering because I didn't spot a secondary prop in the above pics....

There is a secondary folding prop it was on the Starboard side about 4 feet back from the main prop.
The shaft is just visible to the right of the last wooden prop

 

[MapisM]

Doh! Yep, now I see it, well spotted.

 

[longjohnsilver]

Doh! Yep, now I see it, well spotted.

Well I saw them both earlier! ;-)

 

[stillwaters]

Fwiw,the wing engine apparently had a Gori 3 bladed folding prop. As I mentioned earlier,Ancasta listed her for sale when she was in better health,also including a video and details of equipment etc. (scroll down on webpage to Machinery if interested. Website is
www.ancasta.com/boats-for-sale/nordhavn-nordhavn-76-28373/