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denodon
Post subject: Re: Republic of the Philippines (AU)Posted: December 18th, 2013, 11:12 am
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The Jose Rizal class is a very impressive looking drawing however the navigating crew on the bridge are going to have a terrible time, the No2 gun blocks their entire view! Just thought I should mention that.

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ruzzelsuallo
Post subject: Re: Republic of the Philippines (AU)Posted: December 18th, 2013, 11:54 am
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denodon wrote:
The Jose Rizal class is a very impressive looking drawing however the navigating crew on the bridge are going to have a terrible time, the No2 gun blocks their entire view! Just thought I should mention that.
Fixed the ships...hahahaha...sorry but that concept didnt came in my mind..
Thanks for the praise!! :D

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bezobrazov
Post subject: Re: Republic of the Philippines (AU)Posted: December 18th, 2013, 6:05 pm
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ruzzelsuallo, I like to know in what year your ACR Solidaridad is depicted. Right now, if it were shown "as built" there are several serious issues, such as the use of wrong types of guns (shields), directors, ships' boats etc.
One immediate thing I can tell you right now is that with the main guns so extremely far towards the ends, you'll end up breaking the ships back, suffering very uncomfortable pitch, and also en extreme degree of instability! Though, with such massive weight, you'll have a ship with relative low metacentric height, the weight itself is placed too far up to be of any use. - In other words, your ship will be completely useless as a gunnery platform!
What I like about your design, is the fact that it bear semblance to the excellent products of Sir Philip Watts. Maybe you'd allow me to tweak it some?

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acelanceloet
Post subject: Re: Republic of the Philippines (AU)Posted: December 18th, 2013, 6:20 pm
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bezo, could you explain to me the effect of weights at the far end on pitch and transverse stability?
as far as I know, it has mostly effect on the strength. it has effect on the lontitudinal stability and on the GM due to the movement of the center of gravity, but if both turrets are moved the same amount to the midship and are placed on the centerline, moving them more inship will have no effect on the CoG.
I agree about it being bad for the strength of the ship, but the placement of heavy weights has only an indirect effect on stability, as far as I know.

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bezobrazov
Post subject: Re: Republic of the Philippines (AU)Posted: December 18th, 2013, 6:40 pm
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Well, according to the old school (to which I, evidently adhere..., such illuminati as Dr Oscar Parkes, Sir Eustache Tennyson d'Eyncourt belonged to it too) increased inherent stability could be achieved by adding calculated weight along the sides or centerline, such as was done on Sir Philip Watts' Warrior-class ACRs. Basically it has to do with the simple maxim of placing your heaviest armament as low as possible relative to the center of gravity. You're absolutely right about the longitudinal strength, of which the Solidaridad-class has severe issues with. And as far as the pitch, I've learned (and I may be wrong...) that heavy weight placed at the ends, besides the other issues, will create a vessel that will pitch violently and be extremely wet. - Since I know you're more current than I on the topic, ace, I welcome an exhaustive clarification, in case my argument doesn't hold. It might help many others in the design of their ships!

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erik_t
Post subject: Re: Republic of the Philippines (AU)Posted: December 18th, 2013, 10:10 pm
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Placing heavy weights far from the center of the ship will increase the moment of inertia, of course, and this should make a ship more steady, in that it will change rotational speed more slowly. The converse would be a ship that pitched and rolled very rapidly, like the USN DE's in WW2, which were regarded by some as less-than-habitable in North Atlantic storms. They were safe, in that they bobbed like a cork, but they were uncomfortable because they snapped rapidly to whatever the sea wanted moment-by-moment. A steady ship would be more comfortable but somewhat less safe, in that it might take on (for example) a long slow roll and go past the point of no return before hydrostatic stability could arrest the roll.

I think. This is outside of my professional background.


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bezobrazov
Post subject: Re: Republic of the Philippines (AU)Posted: December 18th, 2013, 11:26 pm
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I think, erik_t, that you nailed it pretty well. Thank you for that explanation.

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ruzzelsuallo
Post subject: Re: Republic of the Philippines (AU)Posted: December 19th, 2013, 12:45 am
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erik_t wrote:
Placing heavy weights far from the center of the ship will increase the moment of inertia, of course, and this should make a ship more steady, in that it will change rotational speed more slowly. The converse would be a ship that pitched and rolled very rapidly, like the USN DE's in WW2, which were regarded by some as less-than-habitable in North Atlantic storms. They were safe, in that they bobbed like a cork, but they were uncomfortable because they snapped rapidly to whatever the sea wanted moment-by-moment. A steady ship would be more comfortable but somewhat less safe, in that it might take on (for example) a long slow roll and go past the point of no return before hydrostatic stability could arrest the roll.

I think. This is outside of my professional background.
Im enlightened......so should i put the guns nearer to the center or it is good enough??

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ruzzelsuallo
Post subject: Re: Republic of the Philippines (AU)Posted: December 19th, 2013, 1:30 am
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[ img ]

BRP Agueda Esteban
BRP Teodora Alonzo
BRP Melchora Aquino
BRP Gregoria de Jesus
BRP Espiridiona Bonifacio
BRP Gregoria Montoyo

Named after the famed feminine heroes of the 1898 Revolution, the Agueda Esteban class is a series of 6 air-defense cruisers built by Great Britain for the Philippine Navy.
With the threat of aircraft becoming more imminent in the 1930s, the Philippine Navy decided to find smaller-than-battleship vessels with enough firepower against both ships and aircrafts. The design came up in 1933, fleet escorts to protect heavier units from both light surface targets and aircraft. The ships were ordered from Great Britain in 1936, and laid down in 1937.
Two ships, Agueda Esteban and Teodora Alonzo were ready for delivery by 1939, when World War 2 sparked. They were purchased by the Royal Navy prior to completion for use in the War and was renamed HMS Falcon, HMS Eagle, HMS Vulture, HMS Pigeon, HMS Penguin, and HMS Hawk. They were refitted by the Admiralty in mid-1942 that added air-warning radars in their arsenals for improved detections. The ships saw action in many of the battles in the Mediterranean, notably in the Battle of Sirte, in which HMS Hawk and HMS Pigeon sank the Italian battleship Littorio and light cruiser Giovanni delle Bande Nere. The ships, after modernized, greatly affected in the final phases of the Battle of Britain, berthed at the Channell Islands and firing against the approaching German bombers, contributing to their loss that prevented the invasion of Great Britain. The ships were also used in intercepting V-1 and V-2 guided bombs hurled by Germany to Great Britain in the final phases of the War.
After the end of the war in Europe, Philippines began to seek additional ships to bolster its fleet. In the end, the Philippines decided to acquire 4 out of the 6 Agueda Esteban class cruisers and were recommissioned to the Navy in 1947.
The ship remained active until 1966, when BRP Teodora Alonzo, deployed to Vietnam as a specialized land bombardment vessel, was severely damaged by North Vietnamese Mig-17s, killing 102 out of its 190 crew. The ships were decommissioned in 1968, and were sold for scrap. The 8-inch gun of BRP Agueda Esteban is moored at Corregidor as a museum piece.

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odysseus1980
Post subject: Re: Republic of the Philippines (AU)Posted: December 19th, 2013, 1:54 am
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This cruiser looks like the Town Class and seem pefect for conversion to CG with Terrier missiles in early 1960's.

What about their crew when operating in Meditterranean?Did they had any Phillipines or all were British?


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