Helgoland IMO 6417657

[haroship]

German HELGOLAND loading at Cuxhaven on the 5th August 2013
and leaving on the following day
*1964,Sietaswerft, Hamburg/488

her story:
http://coasters-remembered.net/showt...hlight=6417657

[Roedspaetten]

This bulb seems to be vey very big on this size of ship/bow...? Reason...? Anyone...?

[Dierk Bauer]

Hi Kent, deckhouse and bow have been altered later, maybe the bulb bow was "on stock" and they got it cheaper

[Roedspaetten]

Could be one reason for it... but I'm still a bit uncertain about it...? smiler... It look so odd with such a big-sized bulb on this ship.... Though perhaps it was made for a special reason... but cannot figure out what this reason could be..... Strange....! But thanks for your "bid" Dierk... Perhaps I should look for some of my old books of shipbuilding.... but then again... they were printed long before the bulbed-bows became so modern on ships.... Must mean that I'm a very old man then...?
Rgds
Kent

[Dierk Bauer]

join the club ....most of us are members already

[Uniconnection Shipping]

Hi Dierk,Kent just a thought on the bulb could it be used also for extra forward ballast ? Seem to remember ships this age had small forward ballast tanks.When at Coastal(Cape Crest and Mount Crest) the bow in ballast used to stick up quite high and trim was c..p for efficient sailing.We looked at fitting a bulbous bow and using it as well for additional for'd ballast Cheers Gareth

[Roedspaetten]

Thanks for your reply to this topic Gareth ...

It could be a plausible explanation of the reason for this curious and way too large bulbous bow on this old Sietas-building ....

Kind Regards

Kent

[Dierk Bauer]

Hi Kent, Gareth and all

discovered something about this subject in the shipping magazine "Schiffahrt International" 1986 June editon, picture and german text can be seen by clicking and enlarging of the attached image, started with the english translation with the help of Google Translator....but a bit too difficult
Hope you can understand a bit....

Big Nose = better performance
Brake - Not only the bigger ones can get it -
smaller ships can afford the bulbous bow too
The MV »Margot Schlichting "is the sailing evidence.
The 229 GRT coaster "Margot Schlichting", in 1950 built as "Elli Ahrens "
received eight years ago by the shipyard C. Lühring
that nose, which appears to be oversized and large to eyes of experts
and other viewers. But this is not the case as experience showed.
In 1978 the ship was extended. And it showed promptly as with
all extended coasters, to be bow heavy by homogeneous
cargo. The shipyard C. Lühring calculated that the attached bulbous bow
gives the foredeck an additional
buoyancy of 20 tons, except the
Sustainability and growth to a
equal-heavy immersion homogeneous charge
leads. And in the ballast voyage lowers the
Fore by the weight of the bulbous bow
deep down, because the buoyancy, shallow draft
because, it is now not effective.
With an unchanged steering gear is here »
to control empty vessel slightly better when
laden ship, the maneuverability
remained unchanged.
The increase in speed when loaded
Ship is about 0.75 knots, when
empty at 0.3 knots. The smooth waveform
is a good indication. The rest of
Bow wave is 0.25 L from the front, what a
9% strength increase in speed corresponds
or a corresponding fuel savings
for the same ship speed
as before. When voyage in ballast cuts,
can be seen as the photo, the bow
not through the water, it glides almost darüberhin.
The question whether the conversion of nearly 30
Years old coastal motor ship this
Has paid amount, was from the outset to
affirmative: The "Margot Schlichting," owner
Hans Schlichting in Brake, has a
indestructible 221 kW diesel engine, which is
really a shame, as he with the
Running ceases. There was this "cure" of the vessel
quite appropriate ...

[Roedspaetten]

Originally Posted by Dierk Bauer

Hi Kent, Gareth and all

discovered something about this subject in the shipping magazine "Schiffahrt International" 1986 June editon, picture and german text can be seen by clicking and enlarging of the attached image, started with the english translation with the help of Google Translator....but a bit too difficult
Hope you can understand a bit....

Big Nose = better performance
Brake - Not only the bigger ones can get it -
smaller ships can afford the bulbous bow too
The MV »Margot Schlichting "is the sailing evidence.
The 229 GRT coaster "Margot Schlichting", in 1950 built as "Elli Ahrens "
received eight years ago by the shipyard C. Lühring
that nose, which appears to be oversized and large to eyes of experts
and other viewers. But this is not the case as experience showed.
In 1978 the ship was extended. And it showed promptly as with
all extended coasters, to be bow heavy by homogeneous
cargo. The shipyard C. Lühring calculated that the attached bulbous bow
gives the foredeck an additional
buoyancy of 20 tons, except the
Sustainability and growth to a
equal-heavy immersion homogeneous charge
leads. And in the ballast voyage lowers the
Fore by the weight of the bulbous bow
deep down, because the buoyancy, shallow draft
because, it is now not effective.
With an unchanged steering gear is here »
to control empty vessel slightly better when
laden ship, the maneuverability
remained unchanged.
The increase in speed when loaded
Ship is about 0.75 knots, when
empty at 0.3 knots. The smooth waveform
is a good indication. The rest of
Bow wave is 0.25 L from the front, what a
9% strength increase in speed corresponds
or a corresponding fuel savings
for the same ship speed
as before. When voyage in ballast cuts,
can be seen as the photo, the bow
not through the water, it glides almost darüberhin.
The question whether the conversion of nearly 30
Years old coastal motor ship this
Has paid amount, was from the outset to
affirmative: The "Margot Schlichting," owner
Hans Schlichting in Brake, has a
indestructible 221 kW diesel engine, which is
really a shame, as he with the
Running ceases. There was this "cure" of the vessel
quite appropriate ...

Hello Dierk ....
You are certainly very thorough when you examine things ... But it's also just nice to read a good and professional explanation of the background of the shipowners' choice of bulbstævnens shape and size when trying to minimize the impact of their previous modernization and reconstruction of their older ships .... smile
And the description fits quite nicely with the previous assumptions and proposals described in the previous replies in this thread ... Gareth hit even spot with the content of the previous answer ...
Their "technical solutions" to their choice of new bulbous bow's on their old ships are now not especially handsome or beautiful ... On the contrary, they look quite awful when they are not in harmony with the ships' original shapes and lines ... smiles. ..
But it is a matter of opinion what people think is ugly / beautiful ... And my own personal opinion is the indifferent .... I's just an old nostalgic shipbuilder fully fledged sailor and romantic ..... And my time within "ship sectors" are of course long gone ... They have long since stopped building "my ship types" and almost all ships "from my time" does not exist any more and certainly not in "original version" .... smile .. But okay, I don't Neither .... smile

Thank you for your answers and suggestions in this thread. And Dierk, I owe you a big thank you for your solid research work. Thank you my friend ..

Kind Regards to all

[haroship]

HELGOLAND berted at Cuxhaven 12 November 2023