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Post subject: Re: The Dominion of WestraliaPosted: June 13th, 2018, 7:21 am
Posts: 1408
Joined: January 21st, 2014, 5:33 pm
That or ditch the 4.5" twin as by late 60s its far less useful than the Mk22 (better for everything apart from shore bombardment), you could balance that with a 3" or just 57/40mm? for small junk bashing?

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Post subject: Re: The Dominion of WestraliaPosted: June 13th, 2018, 9:20 am
Posts: 5603
Joined: July 31st, 2010, 10:07 am
I agree that providing a SAM system and retaining the 4.5in guns on a standard Leander hull is impossible. To do that would require a new hull with more length and beam and you would quickly grow to something more destroyer sized I think. Plus you've got Ikara which is another heavy and space-intensive system.

The drawing itself looks good but the concept is far too ambitious.

Hood's Worklist
Interwar RN Capital Ships
Never-Were British Aircraft

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Post subject: Re: The Dominion of WestraliaPosted: June 17th, 2018, 1:37 pm
Posts: 36
Joined: March 28th, 2017, 5:59 am
Rightio, attempt no.3 at the Esperance class

In the early 1960s, the RWN drew up requirements for a new class of frigate, with a decision being reached in 1963 to purchase 6 Garcia-class frigates from the US. However, these plans were cancelled the following year in an act of protest to US pressure to enter the Vietnam War, and new plans were drawn up to procure a different class of frigate. Initially, the design was effectively a lengthened Leander-class, however, by the time construction started, enough alterations had been made that it had become an entirely new class of vessel, though its Type 12 lineage was clearly apparent and the ships still superficially resembled the Leanders. Christened the Esperance class in 1965, the year construction began, the first of class was launched in 1968 and commissioned in 1970.

[ img ]

Length: 123m
Displacement: 3450 tons
Speed: 27kts
Range: 5500mi
Complement: 283
Armament: Mark 6 4.5" (113mm) twin turret, 2 x 40mm L60, 2 x 20mm Oerlikon, 2 x M2 .50BMG, GWS-22 Seacat, Mk32 Torpedo Tubes firing Mk 46, Ikara
Systems: SPS-40, SPS-10, MRS-3, GWS-40, Type 162 and 170 sonar
Aviation: Single Westland Wasp helicopter in general-purpose/anti-submarine role

The first major refit for the class come in 1984, and was informed in places by experience gained during the Falklands War. The most visible changes was the replacement of the 4.5" twin gun with a single Mk45 Mod 1 5" gun, removal of Seacat in favour of Sea Sparrow, as well as the addition of Mk141 cannisters for Harpoon missiles.

[ img ]

Armament Refit: Mk45 Mod 1 127mm, RIM-7M Sea Sparrow fired from Mark 29 Launcher, RGM-84C Harpoon
Systems Refit: SPS-49, SPS-55, WM-25, STIR-180

In 1989, Ikara was deleted and the space left plated over, increasing the flight deck area and providing space for a single Phalanx CIWS.

[ img ]

Weapons Refit: GAM-B01, Phalanx 20mm Block 1 CIWS
Aviation: Single Westland Lynx

The next significant refit for the class came in 1994, with the intention of extending the life of the class into the 2000s at which point it was to be replaced by a new class. SPS-10 was replaced by Sea Giraffe, working in conjunction with the WM-25 FCS, whilst SPS-49 was upgraded to a modified form of V(5). Importantly, the old hull-mounted sonars were replaced with a modified Type 2050 set, and a Type 2031(Z) Towed-Array was fitted in the stern (moving Phalanx to the hangar roof). 8 Mk 48 VLS cells firing RIM-7 were fitted amidships, replacing the Mk 29 launcher to make room for Phalanx on the hangar roof. Two of the class, Bunbury and Rockingham, were retired to offset some of the costs of the refit (Rockingham had been damaged in particularly violent weather in the Southern Ocean and it was decided to retire her instead of repairing the damage). Many of the new systems fitted were effectively pre-purchased for the future frigates (Broome class), the thinking being to reduce costs for the planned frigates construction by shifting weapons and systems from the Esperance class at their retirement.

[ img ]

Armament Refit: Mk 48 VLS firing RIM-7
Systems Refit: SPS-49 upgraded to V(5), Sea Giraffe, Type 2050 hull-mounted sonar, Type 2031 (Z) Towed-Array sonar

I'm hoping this sorts out most of the problems from before, but of course point out any major faults if they're there. If everything works out well enough, I think I might redo the Broome class in-line with what I've drawn here, change systems around and the like.

Last edited by thegrumpykestrel on June 17th, 2018, 2:26 pm, edited 2 times in total.

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Post subject: Re: The Dominion of WestraliaPosted: June 17th, 2018, 2:16 pm
Posts: 2472
Joined: July 26th, 2010, 11:38 pm
Location: Midwest US
Those mostly make sense to me. Not totally sure all of the refits would make sense economically, but such things can be political decisions more so than economic ones!

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