Van der Valk 23M in build

[acbruce]

Where there are three IPS I understand that there are only two throttles/gear selectors.

How does Volvo program them to work in relation to the centre drive? Is the drive only engaged for higher throttle settings? Or does the ship idle ahead with all three drives engaged?

Does it go silent when one is ahead and one astern? Is it possible to just engage the centre drive for more effficient slow speed trolling?

 

[erik_plus8]

One of the outer engines is "master" and the middle follows that one in respect to throttle setting and gear. But when steering, the middle one is individually calibrated to give best steering performance. In docking mode the middle engine doesn't do anything, the pod stays straight ahead and gear in neutral.

 

[rafiki_]

One of the outer engines is "master" and the middle follows that one in respect to throttle setting and gear. But when steering, the middle one is individually calibrated to give best steering performance. In docking mode the middle engine doesn't do anything, the pod stays straight ahead and gear in neutral.

Sounds sensible.

 

[Yoeri]

Dear all,

Erik is absolutely right (except for one thing)

From port to starboard is: master | slave | 2nd slave

Throttle position
Indeed at throttle position, the middle one will also steer/adjust but will not adjust its RPM itself.
All 3 are calibrated at 50 RPM min equal so there will never be more difference in RPM's than 50.

Docking mode
When docking mode is activated the propellers of the centre drive will not spin and will remain in neutral. The drive itself will turn (and act like a rudder) together with the master (most port side drive).

Yoeri

 

[erik_plus8]

Ah, thanks for that info, didn't know that

Wonder if there's a difference between triple IPS 1 and triple IPS 3 with regards to the docking behaviour of middle engine...? I'll check...

 

[Imperial One]

Yoeri,
Your knowledge base just gets bigger

 

[Yoeri]

As I always do my best for this Michael!

Dear Erik,

I have a small addition to what I said:

According to Volvo Sweden the centre drive follows/steers together with the forward thrusted drive when in docking mode, and will not produce any propulsion.

So the centre drive can follow the portside drive as well as the starboard side drive depending on which one is thrusting forward.

Regarding your question of the difference in docking behaviour of the IPS 1 and IPS 3 units:

The EVC platform (and also the software which is used to control/direct the drives is the same on both IPS 1, IPS 2 and IPS 3. The only difference is the engine power (shaft power). Thus, in some cases, it seems that an IPS 3 compared to (for example) an IPS 2 reacts faster and more direct.


Yoeri

 

[erik_plus8]

Dear Yoeri

thanks for that additional info!

 

[FlyingDutchman]

Dear Youri,

Any new pictures yet?

Hartelijke groet!

 

[Yoeri]

Dear FlyingDutchman,

The cutted parts for the main superstructure arrived today (arround 14.00 hours local time).
The construction workers will start with the construction of the superstructure immediately so I will try to make some new pictures before (or on Saturday) the weekend.

Groet,

Yoeri

 

[Yoeri]

Dear all,

Hull construction comes to an end this week.
The construction workers have finished "punsh lists" over the lenght of the ship as well as the punsh list on the stern.

The stern itself is finalised at this moment.

The cutted superstructure parts are sorted, so that the construction workers can start building the superstructure next monday.

 

[erik_plus8]

Absolutely amazing - thanks for sharing!

 

[rafiki_]

By punish lists, do you mean stampings? Apologies, I am not being critical of your English, as it is really good. I guess very few of us on this side of the North Sea have any Dutch language skills

 

[Yoeri]

Dear Rafiki,

My apologies. I did not know the correct word for it.

I indeed mean the bumper strips / rails on port- and starboard side. Just above the portholes.

As well as the list that runs into the swimming platform.

Thanks for the corrections Rafiki!

Yoeri

 

[rafiki_]

Dear Rafiki,

My apologies. I did not know the correct word for it.

I indeed mean the bumper strips / rails on port- and starboard side. Just above the portholes.

As well as the list that runs into the swimming platform.

Thanks for the corrections Rafiki!

Yoeri

Ok, do you mean the rubbing strake that gives protection to the hull?

 

[Yoeri]

Exactly that Rafiki, thanks!

Yoeri

 

[FlyingDutchman]

Thanks Youri,

Very impressive, it looks like a jigsaw puzzle to me!

 

[PCUK]

I can't wait for the Forum party on board.

 

[Imperial One]

Sounds like a plan to me

 

[Yoeri]

Not a bad idea guys! Haha! ;-)

@FlyingDutchman: Yes, indeed! The total number of cutted parts can reach up to 4000 individual parts.

On the following pictures you guys can see the skeleton of the superstructure is being constructed. The finishing of the superstructre will not take long from now on.

Superstructure skeleton

Latest developments hull

(box for the gangway)

Inside the hull

As you all can see we have put in another big porthole for the master cabin. After construction of the hull, making adjustments to portholes or the hull/superstructure is no problem because this will not be seen after the ship is filled/sanded/painted.

Also the hull-inserts of the IPS are fitted.

According to our schedule the ship will leave the Aluminium construction shed at the end of November / beginning of December to be transpoted to the painting shed. There her next stage will take place.

Yoeri