Hello John

The Waine book, Steam Coaster and Short Sea Traders arrived today but have yet to find the image of the mushroom.

Toby

Hi Toby, yes that will be rivetted to the deck previously and possibly be a pad underneath the deck - as this was to spread the load of the bollard when it was under stress.

John

Hello John

What wonderful old b&w photos!

Noticed the rivets and liked the example of the mushroom vent.
I must go to the drawing board and plan how to make those vents, 4 struts 4 openings by the look of it forms the top portion.


Re the bollards what is the chamfhered block on which it sits. is that fastened to the deck apart from the rivets of the bollards.

Toby

Hi Toby,

If you look at the

· first image - it looks like the bollard is riveted in place which I think will be right for the time of your ship

· the next few images - if you enlarge them you will see the mushroom vents next to the people
and follow the red line on the last pic
hahah


John

Hello John
Thank you for the valuable information and the three photos!
I have found a copy of the book by Waine but was not sure of the volume by Ough.

So a domed top of but slight rather than flat and a rolled rather than square edge to the rim. I have the web in the base plate between the bollards.

Assume that these bollards were bolted rather than riveted to the deck?

Toby

hi Toby
on most drawings depicting hidden diameters is normally done, as you say, in dotted lines and 10 inch diameter can indicate the bollards width at its middle section which, in this case, it does. Yours on the model you are building from the 1930s will not be prefabricated steel i.e. welded, they will be cast. The British shipyards were rather slow on the uptaking of welding steel and it wasnt until after the 2nd world war that we really got into the swing of things - long after the Americans, the Germans and the Japanese had been doing welding ships before the war. Three photographs which show you the type of bollards and the top of a bollard and also can show you the physical size of them.

As far as the mushroom vents go, according to British Steam Coasters by C.V.Waine, there is a small drawing which shows a true mushroom shaped ventilator on a ship - also in the book from Norman Ough he has a set of drawings of them, although they were mainly aimed at Royal Naval ships, they would also be found on a merchant ships.


John

Yes I think the 10"is the dia of the main pipe ,I seem to recall from my fuzzy memory that they wer called either VS1 or VIS 1 when we fabricated them years ago

Thank you Marky

So you believe the dotted line does represent the 10".

I asked, for someone suggested that the bollards may have had domed tops. New to me and the plan seems to indicate flat plate tops.


Toby

Hi Toby the bollard will be 10"dia (dotted line)the outer line shows it was capped ,these look like fabricated bollards made from heavy pipe and plate and welded. Just my thinking