Cruiser/Liner Stability and Promenade Decks

[lyndarra]

I came across this interesting video on ship design faults before and during WW2. The first half of the video deals with war ships and then (from about 8.58) there is discussion on how bow design affects stability. After that there is discussion on a design flaws in promenade decks on the Titanic.

 

[MicCanberra]

The biggest issue with the Titanics promenade now is it is on the ocean floor, back then, I imagine it was too many sn9bs hogging the railing.

[lyndarra]

While watching the vid I came across a possible source of the expression "to get a handle on it" in a life or death situation.

[SinbadThePorter]

It's interesting that cruise ship design has returned to the straight stem on the bow.

[MicCanberra]

5 minutes ago, SinbadThePorter said:

It's interesting that cruise ship design has returned to the straight stem on the bow.

https://www.boatingworld.com/question-answer/why-do-new-cruise-ships-have-straight-bows/

 

But do they still have the bulbous knob at the bottom of it?

[arxcards]

12 minutes ago, MicCanberra said:

https://www.boatingworld.com/question-answer/why-do-new-cruise-ships-have-straight-bows/

 

But do they still have the bulbous knob at the bottom of it?

I believe so, and the shape is still critical for the way the water flows under the bow for fuel efficiency. You would think that with sims that this would be a perfect science now, but there is still continued evolution. As with Alaska Airlines a couple of weeks ago, there continues to be moments when engineers scratch their heads.

 

I wonder if Clive has redesigned his promenade decks on Titanic II

[Karaboudjan]

On 1/15/2024 at 2:07 AM, MicCanberra said:

https://www.boatingworld.com/question-answer/why-do-new-cruise-ships-have-straight-bows/

 

But do they still have the bulbous knob at the bottom of it?

 

You can find photos of the Norwegian Prima in the dry dock.  There is still a 'knob' but it is only bulbous to the sides, not forward.