Even if there is something that makes that difficult... a stationary ship/armor object would probably suffice. Less configurable mind you but still an option.

I also found a picture of the tower I was thinking of...

http://www.nationalmuseum.af.mil/sha...-1234S-011.jpg

EDIT: I'm not even sure if that is a flak tower... hrmm!

I had in plan but for now it´s not realized done for Berlin or for Vienna town one model of Flakturm. (Flakturm VI - Stiftskasern, Vienna)
Problem is map. Is there only map of Berlin.
Map with Vienna is in progress in Czech community but in early time where not Flakturm done.
Second thing is that must be done flak40 zwiling (128cm) and flak38 vierling (4x20mm )which is not in IL2.
Third thing find solution for advanced AI which will be aim only in one air "cube" with two level light vs heavy flaks.

Is there too much things and very small use :(
Am not sure if will be in anytime realized
Now I have in progress only flak38 vierling ... but for trains/ground use

Not a flak tower. It's a French-style water tower.

THIS is a flak tower:

http://upload.wikimedia.org/wikipedi...r_dsc01576.jpg

or, if you want the allied version:

http://growabrain.typepad.com/photos...es_estuary.jpg

Not that I wouldn't object to seeing that sort of water tower in the game!

Aha... now I know :)

I was aware of this type: http://upload.wikimedia.org/wikipedi...r_dsc01576.jpg

But not of this: http://growabrain.typepad.com/photos...es_estuary.jpg

What are those (aside from the obvious)?

I'm not quite sure what you're question is.

The German "flakturms" look like castles and were built on the outskirts of major cities such as Vienna and Berlin from 1942 on to protect against allied bombing raids. They were designed not only as AA gun outposts, but also bomb-proof command centers and air raid shelters. As you can see, they are quite tough. A few were demolished after the war, but most exist to this day.

The structures on stilts in the water are one of the Thames Estuary "sea forts" built starting in 1942 to protect against German bombing raids. Before then, German raiders could fly straight and level up the Thames estuary, more or less protected from flak as they completed their bomb runs against London.

To make things tougher for the Germans, the British constructed several "sea forts" about 6 miles off the Kentish coast. Each consisted of 6 subsidiary forts, fitted with AA guns, linked to a central command and control fort. They were manned until the 1950s, when they were either abandoned or torn down.

In the 1960s, a few were colonized by "pirate" radio station operators seeking to skirt the UK's restrictive broadcasting regulations.

Subsequently, they were abandoned again, although at least one is inhabited by a rather eccentric (former) English major and his family, who have declared their sea fort to be sovereign territory!

http://www.sealandgov.org/history.html