While doing the research on the last post about the Nab Tower I was interested
to see that the unique "floating concrete base and sink it" technology for
creating fortifications at sea was re-used in the Second World war... I think
most people may have seen these (and to coin a phrase from
Mr Kinch on the
previous post, they are
seriously batty - straight out of "War
of the Worlds"):
...which are the Navy version. So the story goes, Maunsell was an architect
and went to the MoD at the beginning of WW2 with designs for various forts.
The naval fort design was the latest of several that Maunsell had devised in
response to Admiralty inquiries. Early ideas had considered forts in the
English Channel able to take on enemy vessels. The forts, built in the Thames
estuary and operated by the Royal Navy, were to deter and report German air
raids following the Thames as a landmark, and attempts to lay mines by
aircraft in this important shipping channel. There were four naval forts:
Rough Sands (HM Fort Roughs) (U1) Sunk Head (U2) Tongue Sands (U3) Knock John
(U4)
The design was a concrete construction; a pontoon barge on which stood two
cylindrical towers standing 18 metres in height, 7 metres in diameter. Each
tower had 7 floors of which 4 of these floors were used for crews quarters
(the wall thickness of the reinforced concrete towers was 9 centimetres) on
top of which was the gun platform mounting two 3.75-inch guns. In the centre
of the deck was the officers quarters, medical room & kitchen. Mounted on
the roof of this living area were two 40 mm Bofors anti-aircraft guns and the
operations control room on the roof of which was 2 forms of radar. So
basically a double Nab Tower with a single concrete float, but a lot more
armament - but fundamentally the same design. Makes you wonder if Maunsell had
studied Menzies original design...
Everything was done in a rush - clearly invasion fever was at it's height -
the towers were fitted out at the same time their crews went on board (about
100 men who lived in the legs). Like the Nab they were towed into position
(with crews on board) and then sunk to rest on the seabed (with crews on
board!) There were concerns that the same might happen as to the Nab (a list
of 3 or 4 degrees) but this didn't happen. Rough Sands was the first fort and
was sunk 11th Feb 1942 in 37' water. Following shows how they were
placed...
Interesting... but no more than a diversion!
Very interesting Steve. I knew that Guy Maunsell had been involved in the design of the Mulberry Harbours that were used for the D-Day landings and subsequently, but wasn't aware that he had been involved with these (although the clue is in the name!). By the way, I think he was actually an engineer rather than an architect - and I know this because I work for the company that Maunsell & Partners ultimately became!
ReplyDeleteregards WW
Wow! That's a claim to fame - I retract my description of him immediately...!
ReplyDeleteI know he was more famous after the war - he didn't start his architects practice until '55 (??) but couldn't find out much about his activities before then.. I'm guessing he was already well known at the start of the war - can't see the MoD spending that kind of money on a plan from an unknown!
Excellent info, thanks for sharing.
ReplyDeleteI should set a Rocketman battle on something like that! I can just imagine some villain using one as a secret base...
ReplyDeleteExcellent post. These are very interesting and (it seems to me) eccentric and therefore typically British. I've seen a few similar structures in the Solent protecting Portsmouth.
ReplyDeleteInsidentally there is an excellent model of the Army Forts at the Docklands Museum. I wrote about it and posted a picture on my blog when I last visited the museum in June 2009.
Lee - thanks for that - if I'm honest the army one's are the more visually interesting, but don't they look "fragile".. I really wouldn't fancy having to traverse the walkways between the towers in a storm!
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