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BlackBat242
10-11-2011, 05:32
While I'm going to speak about their unique armament feature, any further info or pics are welcome.

We normally associate "running out the Guns"* with sailing ships and muzzle-loading cannons.

However, these modern warships (commissioned 1969) also feature this type of armament.


* armament located behind closed hatches that are opened and the armament moved to stick outside the hull.


The Finnish Turunmaa-class gunboats carried two RBU-1200 anti-submarine rocket launchers. The RBU-1200 launchers were mounted inside the ship.

The bulkhead behind the launcher is fitted to slide up and over the launcher, in the manner of a garage door made up of horizontal panels (pic #1, just aft of the hull number). You can see the segments, the hinges, the rails it slides up&over on, and the locking lugs on the sides of the segments. At the left outboard edge of the plate the launcher is mounted on, can be seen the pivot-hinge next to the door in question (pic #2). The mount rotates on that pivot and would clear the door.

In action the door is opened, the RBU is swung outside, and then the door closes to keep the blast out from the hull. The RBU is fixed forwards for firing and is fully external.

This is because this model uses manual reloading, although larger RBUs are reloaded automatically. This system stops crews from having to run around the cramped deck of a small ship in a seaway... especially in the snow, wind, & waves of a north Baltic winter. They can reload and maintain the RBU in comfort.

Shinysheff
10-11-2011, 14:45
Strange place for a photocopier in that second pic....

BlackBat242
11-11-2011, 04:35
Karjala is currently serving as a museum ship... so "non-war-like" equipment has crept in a few places.

;)

Perman
04-12-2011, 12:29
Hi everyone!

The two Finnish Turunmaa class gunboats were unique in several ways. JFS 1984/85 has this note about engineering (btw they had a CODOG machinery with 3 MTU diesels with 3 000 bhp and a Rolls-Royce Olympus TM1A gas turbine with 15 000 bhp = 17 knots on diesels and 35 knots on gas turbine):

"The exhaust system is trunked on either side of the quarter-deck, the two plumes coalescing some 50 ft abaft the stern. This has two advantages - it provides an infra-red decoy and it can drive the ships at up to 12 knots without turning the screws."

Furthermore the 4.7 inch (120 mm) Bofors TAK L/46 gun turret was (and probably still is) the fastest naval 4.5 - 5 inch gun ever made. It was made as a private initiative by Bofors in 60's and was developed from an landbased AA gun (of which the prototype actually saw Swedish army service into the 90's), and it had an amazing RoF of 80 rounds/min(!)

This gun is still in use on the three Indonesian Fatahillah class light frigates, and when the Finnish boats were decommissioned in 1999 (Turunmaa) and 2001 (Karjala) resp. the Finnish sold all the remaining ammo and spares parts to the Indonesians.

The TAK L/46 was also fitted on the Finnish midshipmen training ship Pohjanmaa until 1997-98, when it was replaced by a Bofors 57/70 Mk1 turret during a refit. This was of course done of commonality purposes, but it may have improved sea keeping as well. Pohjanmaa is still in service despite her 32 years of service, and she returned from a 3 month patrol in Somalian waters in May this year as part of operation Atalanta.

/Per

derek s.langsdon
04-12-2011, 14:23
Let's hope the Indonesians find them useful, a great idea updated from history which sounds and looks from the pix, to be very handy when in pursuit of pirates (and any other unwelcomed) in the pacific and indian oceans

derek L

jainso31
06-12-2011, 07:43
An RoF of 80 rounds per minute is pretty impressive for a 120mm gun. A minute of fire on a pirate vessel would quite likely sink it.This appears to be a useful piece of kit -in the right hands.;);)

jainso31