Imperial Swedish Navy

I can't decide on the torpedoes - whats the use of a 400mm asw torpedo launched from a deck or side mount over the ASW rocket launcher? The RL is faster when you have a firing solution - less risk for the sub to fire back or evade the weapon.

How good where ASW torpedoes in the 60s? range? speed? The torpedo and RL is a duelling/ close in weapon, the main ASW weapon are standoff types like a helicopterlaunced torpedo.

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Psilander wrote:

How good where ASW torpedoes in the 60s? range? speed?

Until recently most of the ASW torpedoes still in use were either direct replacements for or improvements of designs that date back to that period (Mk 37, Mk 46, Tigerfish, Spearfish, etc). Of course they've had vast improvements since and all of these torpedoes are themselves being phased out now for Mk 54 and MU90.

Well, all the LW ASW torpedoes I know of have significantly longer ranges than any DC mortar I've heard of.
However, up until the eighties at least their performance in shallow waters were iffy at best, hence why the RN retained the Limbo for so long.

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Source Materiel is always welcome.

What is the realistic contact or firing range of a shiplaunched ASW torpedo? 5-6000m? A wireguided torpedo could be the weapon of choise between 1500-5000m? A ASROC type of weapon would be interesting in the open sea to gice the sub as short notice as possible.

The maximum range of the last versions of the Bofors 375mm ASW rockets are about 1600m

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Updated the frigate. ASW/ GUIK patrolship

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Göteborg, (Gävle, Kalmar, Sundsvall, Åbo, Helsingfors)
Sweden Guided Missile Frigate laid down 1968

Displacement:
2 615 t light; 2 692 t standard; 3 000 t normal; 3 247 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(404,41 ft / 393,70 ft) x 45,93 ft x (13,12 / 13,88 ft)
(123,26 m / 120,00 m) x 14,00 m x (4,00 / 4,23 m)

Armament:
1 - twin rail for RBS 08 ASM, 12 realoads
1 - quadrupel launcher for RB 07/ GWS 21 "Seacat" SAM, 3x4 reloads
2 - 4,72" / 120 mm 50,0 cal guns - 55,82lbs / 25,32kg shells, 250 per gun
Auto rapid fire guns in turret on barbette mounts, 1950 Model
1 x Twin mounts on centreline ends, evenly spread
2 - 1,57" / 40,0 mm 70,0 cal guns - 2,19lbs / 0,99kg shells, 500 per gun
Auto rapid fire guns in deck and hoist mounts, 1948 Model
2 x Single mounts on sides, forward deck centre
2 raised mounts
Weight of broadside 116 lbs / 53 kg
Main Torpedoes
3 - 15,7" / 400 mm Type 41 ASW torpedoes, 9,84 ft / 3,00 m torpedoes - 0,567 t each, 1,702 t total
In 2 sets of deck mounted side rotating tubes
Main DC/AS Mortars
2x4 - 661,39 lbs / 375mm/ 300,00 kg trainable AS Mortars + 10 reloads - 5,315 t total

Sensors
SPS-12/ PS-12 Air searchradar
WM-20/ Arte 62 Surface search/ radar firecontrol
9LV mk1/ Arte 722 radar/ optical director
UAA-1 Abbey Hill ESM/ ESM
Decca X-band Navigational radar
Sonar Type 300 Towed arry passive sonar
Sonar Type 175 VDS sonar
Sonar Type 190 HMS high frequencey firecontrol sonar.

Aircraft
Platform and hangar for 1 medium/ light helicopter.

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1,97" / 50 mm 0,39" / 10 mm 0,98" / 25 mm
2nd: 0,20" / 5 mm - -

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 36 641 shp / 27 334 Kw = 30,00 kts
Range 2 800nm at 20,00 kts
Bunker at max displacement = 555 tons

Complement:
202 - 263

Cost:
£1,774 million / $7,097 million

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Sorry to keep on with this one, but I with respect I consider it relevant. The point I'm making is that you've created a Swedish superpower, with world-wide commitments, and the ships you've designed reflect that, not least this latest, not just comparable but larger that the British Leander class. Put bluntly the little Alouette just looks wrong here; and sure, the type was adapted into navy service as the photo shows on the Smaland; but that is a very simple arrangement, and to my way of thinking it would not have been much use outside the Baltic, and more likely used against Soviet intruder subs in coastal waters. The thought of landing that skid equiped Alouette on a heaving deck in the North Sea, it would be a nightmare. Rather than simply transferring one type from real-life into a completely different AU scenario, where it doesn't suit, why not have a decent helicopter to start with? If you're looking at the Lynx as a replacement why not have what it replaced - the Wasp; and I don't consider the Alouette comparable, the Wasp was fully navalised, and was a far more robust machine. Failing that, I'd go for the larger version (III) with the landing gear from the Wasp.

Yes - I thinking of a upgrade too - the Aloutte II is quite simple.

My contenders are
Alouette III
Agusta-Bell AB 204AS
SH-2 Seasprite
Westland Wasp

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Wasp>Lynx>NH90 or similar

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For what it's worth the RDN operated the Allouette III in the North Sea and the Arctic for twenty years before replacing them with the Lynx.

I wouldnt operate the seasprite if you are planning on switching to the Lynx and not the upgraded SH-2G but that justs just my opinion

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References and feedback is always welcome!

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