plating, how not to

[whoosh]

saw this abomination in France Strangely IT was built in Holland, imagine the welding. It is the only boat In have ever seen plated vertically in strips
I also got to use this state of the art machine in Poland last week

[Ad Hoc]

I've seen other steel vessels here in Asia with vertical strips at the bow. Especially iwo of bow thrusters, not a pretty sight.

However, if the butts are well supported at both ends and there isn't a long.t strength issue, nor triaxial stress raisers, it "should" be ok.
It does allow those with less skill to plate more complex curves.

[jehardiman]

Is it just me, or does it look like the shell has been plated over? An original welded shell should never have relief like that no matter who did it.

[wardd]

I kinda like it more than most boats i see

[Ad Hoc]

Yes, odd....i saw the rubbing strake, but didn't see the odd looking shape of plate that appears to be either a thick insert (but no taper) or a bloody large doubler over the hawse pipe!..odd!

[Wynand N]

I also got to use this state of the art machine in Poland last week

on par for an ex communist country;)

[Manie B]

Oh my gawd

i only figured out now that the second pic is a welding machine :?:

jeez talk about suicide kids - wow


sorry a bit slow this morning - too much epoxy yesterday :D

[Wynand N]

Manie, that gives a new meaning to a buzz box welder...
I wonder if Stuart can enlighten me if the woman still have chest hair in Poland:?:

[wardd]

i think its macho, a "the hell with what you think" look

it looks like it came off the liberty ship line

probably has a single cylinder chug a lug diesel, 2 cylinders at most

[gonzo]

It looks like a wooden boat "steeled over". There are many like that in the Great Lakes

[whoosh]

No , I think the bottom vert. pl was just lapped over the top (run)
here is a useful link for SMAW welder
shttp://www.millerwelds.com/pdf/guidelines_smaw.pdf
Although I spose it could have been overplated, never looked closely
Polish woman? some exceptionally beautiful ones , have to face the fact, that,at my age I am invisable to them:))
The welder, well my friends father(from this site) has had it by him for 60 years
Dunno if was the machine or the rod, but it ran like very long interval pulse with arc stopping and starting Needless say without my glasses the weld looked like something spattered from aloft
boat 40 tonne the crane was magnificent computerised state art 10000euros to lift in , they loaded 50 tonne weights to the centre of the crane It is a 200 tonne caqpacity machine

[jehardiman]

In the last picture, you can clearly see that the stem is rivited. So my opinion is that someone plated over an original furnace plate rivited hull. The "orange peel" sections are needed because you can never roll a plate to match a furnace plate. With the picture of the hull, it looks like pre-war canal boat, so standardized mass construction would not make a furnace plate hull unreasonable.

[whoosh]

In the last picture, you can clearly see that the stem is rivited. So my opinion is that someone plated over an original furnace plate rivited hull. The "orange peel" sections are needed because you can never roll a plate to match a furnace plate. With the picture of the hull, it looks like pre-war canal boat, so standardized mass construction would not make a furnace plate hull unreasonable.

thanks mate, you may well be right, I hardly paid much attention
the drama after the launch was something else,
would youi like a large file vs of pic?
Not sure what your term furnace pl means Boiler plate?
Have seen some beautiful fully riveted ships, some of which, the plate lines were perfect I think the Germans had the lasst of the riveted ships
That 32mm stem bar was needed hours later as she ploughed into rocks, when the astern gear failed

[jehardiman]

Not sure what your term furnace pl means Boiler plate?
Have seen some beautiful fully riveted ships, some of which, the plate lines were perfect I think the Germans had the lasst of the riveted ships


A furnance plate is a plate which had to be heated and then "bucked" over a mould to give it double curvature. Common on most hulls, riveted or welded, prior to WWII because the heat forming was not overly expensive when plates still had to be hot punched for rivets, joggled for laps, and rolled shapes for frames had to have heat formed joggs also. Most modern post WWII welded hulls are developed with single curvature, and shapes are made up, so furnace work is avoided like the plague.

A lot of the late German work was actualy composite riveted and welded, with the butts welded, but the seam riveted. The USCGC Eagle (ex Horst Wessel) and her sisters are of this construction.

[whoosh]

A furnance plate is a plate which had to be heated and then "bucked" over a mould to give it double curvature. Common on most hulls, riveted or welded, prior to WWII because the heat forming was not overly expensive when plates still had to be hot punched for rivets, joggled for laps, and rolled shapes for frames had to have heat formed joggs also. Most modern post WWII welded hulls are developed with single curvature, and shapes are made up, so furnace work is avoided like the plague.

A lot of the late German work was actualy composite riveted and welded, with the butts welded, but the seam riveted. The USCGC Eagle (ex Horst Wessel) and her sisters are of this construction.
okey dokey, seen some very nice jelks(sp) joggled

[MikeJohns]

I think this technique of bow plating was in vogue for a while.

[whoosh]

tee hee, I once started a thread, Bueautiful Metal Boats, perhaps we should start The Ugliest Metal Boats, most would come from Australia
Although that one has a nice enough entry albeit a wet ride in stiff bzeeze

[JeroenW]

I think this technique of bow plating was in vogue for a while.
Defiance -> What's in a name ... :p

[wardd]

it floats it cant be all bad but then i think liberty ships were beautiful

[Brent Swain]

Vertical plating can create a huge increase in drag if it is not totally fair, as the water flows across the seams, rather than along them.

A friend did an electronics job behind the iron curtain in the communist era. Some of the most beautiful women imaginable there made a beeline to the westerners and dropped their local boyfriends, as they saw a way out. Many of this crew came home with new brides.They obviously thought to so too.
White South African women are so useless that they don't know how to boil a pot of water without burning it.
Brent

[MikeJohns]

Brent
In reality the drag is not that great, it will stimulate tubulent flow a little earlier on but it will make little difference with a long low aspect keel. Sometimes early turbulence prevents laminar separation and vorticity. With fluids it's never simple unfortunately unless you have high aspect foils, then you keep a nice attached flow across the foil and it had better be smooth and acurately manufactured to the design cross sectional shape too.