US BB Conversions

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Gunner98
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US BB Conversions

Post by Gunner98 »

Both the Colorado class (2/43) and the New Mexico class (6/42) have an option to convert from a BB to a BB [&:]. Both classes also have upgrade paths, although a bit later (10 & 11/43) which achieve almost the same thing in raw numbers. I see the Colorado conversion adds about 5000Tons and increases durability by 10 and AA by a couple hundred. The AA is caught up in the 2/44 conversion though. I think the radar and all the small stuff are close enough not to make a difference although a 'compare' function on the conversion page of Tracker would be nice to make sure.

The Colorado conversion takes 270 days (yard size 50!) where the two upgrades cost 65 and I think 21 days The New Mexico conversion takes 45 days vs. the one conversion of 21

I guess my question is - is it worth it to 'convert' these big boys or simply 'upgrade' them? My thought is no, but I might be missing something critical.

Any thoughts?

B
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RE: US BB Conversions

Post by Shark7 »

Sounds like an option to get your late war conversions earlier than historically, tbh.
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RE: US BB Conversions

Post by obvert »

I think this is based on one of the US BB captains arguing for more AA upgrades than originally scheduled, and the Navy going along with it. If I remember rightly, it was one of the New Mexico class? Searched briefly but couldn't find a quick link.
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RE: US BB Conversions

Post by dr.hal »

The fastest way to get radar and high value AA seems to me the best way to go...
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RE: US BB Conversions

Post by Gunner98 »

Yeah I just double checked the dates (SG & SK radar is a constant):

The New Mexico class still doesn't make sense unless there are upgrades beyond the conversion - not sure how to see those:
conversion available 10/43 + 45 days = 12/43 with an AA of 2111
Upgrade 10/43 + 21 days = 11/43 with an AA of 2112
Upgrade 10/44 + 14 days = 11/44 with an AA of 2380


The Colorado class are a bit more complex and now I see the advantage:
Conversion available - 4/43 + 270 days = 1/44 with an AA rating of 2620
Upgrade: 11/43 + 65 days = 1/44 with an AA of 1754
upgrade: 2/44 + 14 days = 3/44 with an AA of 2008
upgrade: 1/45 + 110 days = 5/45 with an AA of 2574
I don't thing the 10 additional durability is a real factor

So at the cost of 81 additional days in the refit- you get the AA advantage 16 months earlier. So a balance of keeping them well protected and using their guns a bit more - or locking them away. The Nevada class already have a 270 day refit and I still have two BBs in the docks working on PH damage (and its Feb 43) plus the 2 that are feeding the fish! 43 is going to be a dry year for BBs!


Thanks for the help

B
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RE: US BB Conversions

Post by Don Bowen »


What scenario?
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RE: US BB Conversions

Post by Gunner98 »

ORIGINAL: Don Bowen


What scenario?

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B
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Don Bowen
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RE: US BB Conversions

Post by Don Bowen »


This looks like the big rebuild of the Colorados set as an optional "conversion". Would give the player the option of keeping them in service with minimum upgrades or doing the full rebuilt.
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RE: US BB Conversions

Post by wdolson »

ORIGINAL: Gunner98
So at the cost of 81 additional days in the refit- you get the AA advantage 16 months earlier. So a balance of keeping them well protected and using their guns a bit more - or locking them away. The Nevada class already have a 270 day refit and I still have two BBs in the docks working on PH damage (and its Feb 43) plus the 2 that are feeding the fish! 43 is going to be a dry year for BBs!
B

Except for the several fast BBs that start arriving mid-42. The fast BBs are more useful than the old slow ones anyway.

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RE: US BB Conversions

Post by Gunner98 »

ORIGINAL: wdolson

Except for the several fast BBs that start arriving mid-42. The fast BBs are more useful than the old slow ones anyway.

Bill

Very True. I am keeping them with my CVTFs for the added AA but may split them out and group them for a fast bombardment/raiding TF.

I have also been looking at the old Brit BBs - I've got 4 x Royal Sovereigns sitting around. I have Darwin well protected and 4 x AKEs big enough to rearm a couple of them (if I have my sums right) although I think they will eat about 1-200 supply every time they come home. My worry is the fuel, I know these old buggers are thirsty but have not found a way of calculating how much fuel I need to keep them on the go. Is there such a thing as a quick 'fuel consumption' guide?

Thanks

B
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RE: US BB Conversions

Post by Smeulders »

ORIGINAL: Gunner98

ORIGINAL: wdolson

Except for the several fast BBs that start arriving mid-42. The fast BBs are more useful than the old slow ones anyway.

Bill

Very True. I am keeping them with my CVTFs for the added AA but may split them out and group them for a fast bombardment/raiding TF.

I have also been looking at the old Brit BBs - I've got 4 x Royal Sovereigns sitting around. I have Darwin well protected and 4 x AKEs big enough to rearm a couple of them (if I have my sums right) although I think they will eat about 1-200 supply every time they come home. My worry is the fuel, I know these old buggers are thirsty but have not found a way of calculating how much fuel I need to keep them on the go. Is there such a thing as a quick 'fuel consumption' guide?

Thanks

B

Endurance/Fuel (both can be found in the ship info screen) give you the fuel consumption at cruise speed.
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RE: US BB Conversions

Post by Gunner98 »

ORIGINAL: Smeulders

Endurance/Fuel (both can be found in the ship info screen) give you the fuel consumption at cruise speed.

Thanks - right there in front of me[8|]

So the Royal Sovereign works out to 2.09 - I assume that is 'fuel used per hex'. They work out as more efficient than the US CVs - Yorktown 2.75, Wasp 3.52 and about the same as the old US BBs. A lot more efficient than CLs (~7) & DDs (~15!) - Interesting. About time I figured that one out...

Still need to haul a bunch more gas up there for them though…

B
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RE: US BB Conversions

Post by JuanG »

ORIGINAL: Gunner98

ORIGINAL: Smeulders

Endurance/Fuel (both can be found in the ship info screen) give you the fuel consumption at cruise speed.

Thanks - right there in front of me[8|]

So the Royal Sovereign works out to 2.09 - I assume that is 'fuel used per hex'. They work out as more efficient than the US CVs - Yorktown 2.75, Wasp 3.52 and about the same as the old US BBs. A lot more efficient than CLs (~7) & DDs (~15!) - Interesting. About time I figured that one out...

Still need to haul a bunch more gas up there for them though…

B

Actually, Endurance/Fuel works out as 'distance(nm) per fuel(tons)'. So a lower value is less efficient than a high value.

If you want 'fuel per hex', use Fuel/Endurance * 40. In this case higher is better.
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RE: US BB Conversions

Post by crsutton »

The issue is how bad you need them. If your losses have been low or if you have smacked the Japanese BB force around then I would opt to put them in the yard and upgrade them. If you are low on BBs then it is different.
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RE: US BB Conversions

Post by Gunner98 »

I think I'll put the 2 Colorados into the yard for the long conversion - after they empty their magazines on Tarawa [:D]. Will keep the 2 New Mexicos running and go the upgrade path. Will compensate for the loss of the two US BBs by bringing in a couple Brit Royal Sovereigns to mix it up around Timor working out of Darwin. The Jap BBs have been keeping my Cruiser squadrons down there running scared for a while anyway. Fuel in Darwin will be a problem though..

Thanks for the advice

B
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RE: US BB Conversions

Post by Gunner98 »

ORIGINAL: JuanG

Actually, Endurance/Fuel works out as 'distance(nm) per fuel(tons)'. So a lower value is less efficient than a high value.

If you want 'fuel per hex', use Fuel/Endurance * 40. In this case higher is better.

OK - so the Royal Sovereigns go 2.09 miles per Ton of fuel! Ouch[X(]. So 40/(endurance/fuel) = fuel per hex: or in this case 40/2.09=19 fuel per hex! I gotta ship lots of fuel up there then...

I knew it was too simple [;)]

Thanks
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RE: US BB Conversions

Post by wdolson »

I found that shuffling the tankers around so most of the 12000 endurance tankers were sailing from Los Angeles enabled me to ship a staggering amount of fuel to Australia by mid to late 1942.  A handful of 8000 endurance tankers can be used to move fuel from eastern Australia to Darwin.  Meanwhile the rest of the 8000 endurance tankers are moving fuel to Pearl or from Aden to Karachi (and some to Columbo).

I can keep 200,000 to 300,000 fuel points in transit to Australia at a time pretty continuously.  I do give the tankers a few days break in Los Angeles after returning from a trip to repair transit damage so the ships don't wear out, but otherwise they are on the move all the time.
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RE: US BB Conversions

Post by Gunner98 »

Am OK on Fuel in Oz, most has come from Abadan to Perth then over rail to Eastern Oz where I have about 1.4 Million right now. Getting it to Darwin will mean taking tankers off the pipeline. This route is shorter but I don't think its as effective as the method you described because both Abadan and Perth max out at port size 7 (and it takes a long time to get them to that) so there are hold-ups in both ports, especially since I am dumping a whack of supply into Perth from Cape Town, plus local traffic from Port Headland and to all the forces in Northern Oz and Timor (which I still hold). There is about the same amount of fuel afloat as you mention but far too often it is hanging around waiting to unload.

Major vulnerability in that route is the Mangalore - Colombo area, have lost quite a few tankers there. Patrolling it like hell but many of the tankers have shot legs and need to refuel in Colombo so its a kill zone. I wanted to turn Diego Garcia into a mega gas station for them but its just too small and I did not want to commit AOs.

I have switched about 160 AKs from the Indian Ocean over to the west coast but no tankers. Will take a good look at that.

Thanks

B
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