New Boat, Swedish Delta "Yacht" - anyone got any info? Jack?

Hi all, Lars signing in..:)

Thanks Fish for pointing me here, it was an interesting read and I wasn´t sure if I should join or not, as I probably must have some biased information on our boats from time to time. You tell me..!

Starting from the last question on the tender garage, it can be removed from the back when access for major operations is needed. There is also a hatch inserted above that can be opened to lift any of the engines. The garage with the Williams 385 and the transformer platform to launch a PWC is in the price, but can be excluded if you would like other solutions. The platform extends from the basic 23.95 meter hull.
 
Despite that some of the forum members think comments on another thread were a little harsh on Princess, I believe that only came about because PMYS dipped in then out, frustrating any genuine discussion. It would be great to see some genuine input from Delta, or any other manufacturer, members will respect knowledgable comments & information and I believe builders can also benefit from the discussions. After all there are potential customers on the forum.:encouragement:
 
Deleted User said:
For the life of me, I don't understand why boat designers put tenders in garages even on a boat this size. Not only does it take up valuable storage or accommodation space but I guess in the case of the Delta, the garage sits over the top of the engines/IPS drives reducing headroom and hindering access.

Mmm, I'd be interested to see how that bluff bow punches through a F7 in the N Sea at 37kts rather than a Swedish lake:)
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I can understand why yacht owners want their white RIB in a garage rather than on a top deck, but as a designer it is more to lower the centre of gravity. With triple engines there is pretty good access anyway and with twin even better of course. The attached picture shows the SB engine and the tender garage over the mid engine.

And very few boats are comfortable at 37 knots in a Force 7 sea, the guys were slowing down to about 23 knots when the waves reached 3 meters when crossing the "Baltic lake"... ;)

D80 Engine Room.jpg
 
Welcome Lars,

Nice engine room. I see the floor is shod with JFM's favourite tread plate ;-) You might want to put forward an option for something other than tread plate.

I love the design overall of the 88, well done on getting hull number one not far from perfect.
 
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wakeup said:
Welcome Lars,

Nice engine room. I see the floor is shod with JFM's favourite tread plate ;-) You might want to put forward an option for something other than tread plate.

I love the design overall of the 88, well done on getting hull number one not far form perfect.
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Thanks for the welcome, and that you like the 80-footer!

About the flooring, I still think the stainless tread plates are good, but when I was a captain I had this blue plastic "grid" on top. It preserved the metal plates and if you got oil on it, it ran under and didn´t make the whole floor slippery. It was also more nice to your bare feet if you did not use special shoes for the engine room...
 
Designo said:
I can understand why yacht owners want their white RIB in a garage rather than on a top deck, but as a designer it is more to lower the centre of gravity. With triple engines there is pretty good access anyway and with twin even better of course. The attached picture shows the SB engine and the tender garage over the mid engine.

And very few boats are comfortable at 37 knots in a Force 7 sea, the guys were slowing down to about 23 knots when the waves reached 3 meters when crossing the "Baltic lake"... ;)
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Designo, welcome to the forum and well done for raising your head above the parapet. I take your point about lowering the CoG compared to storage on the flybridge although of course, compared to storing the RIB on the bathing platform, I can't see that the CoG is lowered. Yes OK I can see that access around the middle engine is not bad but it would be a whole lot better without the garage!
PS you're going to have to improve the grp finish for the garage if you're going to charge €5m!
 
newWave said:
Good point, though it is all carbon fibre if I am not mistaken. Maybe the finishing techniques on carbon are not yet as good as with GRP.
Maybe Designo can shed some light on that.
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Yes, of course. I don't know what the garage is made of but the finish of the garage inside the engine room would really bug me if I'd just shelled out €5m!
 
newWave said:
Good point, though it is all carbon fibre if I am not mistaken. Maybe the finishing techniques on carbon are not yet as good as with GRP.
Maybe Designo can shed some light on that.
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Carbon fibre finish on high end sports cars is fantastic now. Have a look at the McLaren MP4 12C. And it is "only £180k" :)
 
petem said:
Welcome Lars, I'm looking forward to some healthy debate too!
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Thank you, and I'll respond to the comments on the lower dashboard at the same time. We have three of Raymarine's Glass Bridge 17" screens on this boat, but will probably have 3x19" now. There is also an iPad inserted to the left on the dash where almost everything can be controlled, including the entertainment systems. The joystick is where you steer, you don´t need to reach the steering wheel, although the chair can both slide forward and go up/down with electric motors. The new IPS joystick is also the autopilot, so you use it in both high speed and as before, in slow speed.

D80 Lower Dash.jpg
 
Welcome Lars, and thanks for taking the time to post your comments.
As I previously said, I'd be curious to hear if the boat is designed to optimize somehow also the cruising at displacement speed - namely, by keeping just 2 or even only 1 of the 3 engines running?
 
MapisM said:
Welcome Lars, and thanks for taking the time to post your comments.
As I previously said, I'd be curious to hear if the boat is designed to optimize somehow also the cruising at displacement speed - namely, by keeping just 2 or even only 1 of the 3 engines running?
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The hull is designed for all speeds, but sailing with two Christmas Trees attached to your keel is never a good idea. However if you remove the props, it is not too bad, we have tried that on the centre engine of the Delta 54.

Otherwise idling speed is 7,5 knots at 600 RPM, using 16 l/h with all three engines running, if you are cruising at 14 knots with 1200 RPM, it takes 100 l/h.
 
Designo said:
sailing with two Christmas Trees attached to your keel is never a good idea. However if you remove the props, it is not too bad
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Well, actually I wasn't thinking to jump in and out of the water to remove and re-install the props every time someone decides to switch from fast to slow cruising and back.... :D
Of course non-spinning props are very bad for drag, but I was wondering if it isn't still more fuel efficient overall than keeping all engines running at a ridiculously low load - which is the typical problem of planing boats if/when used at displacement speed.
 
MapisM said:
Of course non-spinning props are very bad for drag, but I was wondering if it isn't still more fuel efficient overall than keeping all engines running at a ridiculously low load - which is the typical problem of planing boats if/when used at displacement speed.
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Maybe Volvo Penta have figures on this, but I doubt you get much below 2 litres per NM at 7,5 knots on an 80-footer..?
 
Mmm... My longer non stop passage at D speed so far has taken more than 3 days non-stop. Are you sure VP would recommend such sort of usage?
Regardless, my question was if you considered the option of running the boat on just 1 or 2 engines (aside from emergencies, of course).
The answer is obviously no, I reckon.
Nothing wrong with that, but there's no need to explain/justify that she can as well run at idle with all engines on...
 
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