Small Aircraft Carriers (1 Viewer)

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Howard Gibson

Senior Airman
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Oct 7, 2021
Toronto Canada
Between the mid-fifteenth century and the mid-twentieth centuries, naval warfare was dominated by gunboats. In combat between gunboats, big gunsboats defeat small gunboats. The big gunboats have some combination of bigger guns, more guns, and more capacity to take punishment. Hydrodynamically, big ships are faster than small ships, although, big battleships have generally sacrificed speed for protection. In a war, it makes sense for an admiral to board his biggest, most powerful gunboat, and put is flag up, making it his flagship. The largest and most powerful gunboats are classifed as "capital ships".

This has affected our thinking about warships. We imagine ancient galleys as massive, impressive ships. Ancient galleys, at least as used in Greece, used rams as their primary weapons. The Romans were more into boarding. Ancient galleys ought not be imagined as modern capital ships. Modern fighter aircraft are a much better analogue. A ram equipped galley needs to be fast, it need high acceleration and deceleration, and it must do fast turns. A small galley is harder to hit than a big galley. You need a small, lightweight ship, packed with highly trained, muscle-bound rowers. Galley slaves were invented by the Spanish during the sixteenth century AD, and galleys quickly becamse obsolete.

During the Persian War, the Peloponnesian War, and the Punic Wars, city states built hundreds of galleys each. When storms broke out and caught galley fleets at sea, hundreds generally were wrecked. It is a very safe bet that these galleys were not Nimitz class aircraft carriers. They were small, lightly built, probably open boats. At the Battle of Salamis, Xerxes commanded from a throne located on-shore. Themistocles followed the Greco-Macedonian tradition of throwing himself into the middle of the battle.

This brings us to aircraft carriers. At the start of WWII in 1939, the Royal Navy had seven carriers, five of which would be sunk during the war. In 1941, the US Navy had eight carriers, five of which were sunk. Of ten sunken carriers, the Japanese got six. U-boats got three, and the Scharnhorst and Gneisnau got one. I did not bother to look up the Japanese. I assume that all of theirs got sunk.

Carriers have replaced battleships as capital ships. The big American carriers in particular are described as "cities at sea", with Nimitz carriers displacing over 100,000 long tons. American carrier groups seem to have one carrier only. If the Americans go up against a powerful enemy, how many of these carriers can they afford to lose?

Wouldn't it be wiser to treat carriers as consumables, make them as small as possible, and make as many as possible? Any thoughts?
 
It had a subject that has been done to death many times on many sites, especially regarding the QE class forbthe RN. This is a recent thread on the subject, if you can sort the wheat from the chaff.

Ultimately, today a larger carrier holds certain advantages over a number of smaller ones. It is the air is free, steel is cheap philosophy to deliver a certain level of capability. The expensive part of a carrier is the systems, mechanical and especially electronic. More ships = proportionately more cost.
 
Wouldn't it be wiser to treat carriers as consumables, make them as small as possible, and make as many as possible? Any thoughts?
There is actually economy in mass. I am stating that badly.

For 90 WW II aircraft and the desired fuel and the desired ordnance (bombs, torpedoes, depth charges, etc) you can fit a certain amount in a 30.000ton carrier.
Or at least what the navy planners think are useful amounts.
Now what can you fit into three 10,000 ton carriers, that go the same speed and have the same cruising range.
Note that the USS Independence class were actually 2 kts slower than an Essex, and had 2000miles less range. They carried more fuel per plane.
But sometimes we need to dig a little bit deeper. Essex used eight boilers and a 150,000hp power plant. The Impendence used four boilers and a 100,000hp 4 shaft power plant.
An Essex had a crew of around 2700 men, An Independence needed 1570 men. Adjust as needed for war time changes.

The Big carriers could bring more trouble to the enemy at less cost (engines and other stuff), using less fuel and a lot fewer men. The Big carries do not need 3 times the sailors to run the ship. More yes but not 3 times more.
 
Also, what type of aircraft are to be operated makes a very large difference - particularly with todays VTOL (Vertical Take-Off & Landing) airframes.

If you need the CTOL (Conventional Take-Off & Landing) capabilities, you need a ship of a minimum size - said size being dictated by the landing and take-off runs. With modern jet CTOL aircraft you can't fit that on a hull less than about 750 ft long. The RN's HMS QE and PoW new CVs are intended to carry 40x STOVL (Short Take-Off & Vertical Landing) aircraft each - under normal circumstances.

If you can use all VTOL aircraft then small carriers like HMS Invincible class (22x aircraft each) will do - at least for some missions. For ASW and Local Sea Control - the missions the Invincible class was designed for - they will allow more hulls for a given tonnage and hence a greater area of coverage.
_________________________________ Queen
__________________Invincible______Elizabeth_______Nimitz
Displacement______ 22,000________ 80,600________104,000 tons deep
Length o.a.________ 686___________ 932__________ 1,002 ft
Vmax_____________ 28____________ 32 knots______ 30+ knots
Range____________ 7,000/19_______10,000/15_____ (nuclear) nm/knots cruise
Ship's Crew_______ 650*___________700*__________3,500*
Air Wing Crew_____ 350___________ 650** _________1,500**
# of Aircraft________22xSTOVL_____40xSTOVL***___65x CTOL***
# of Sorties________170___________ 410___________1,550________F-35B internal fuel load is 12,100 lbs (or 5.85 tons)****
F-44 Avtur_________1,000_________ 2,400_________ 9,050 tons*****

* The small difference in Ship's Crew between the Invincible and QE is largely due to significant efforts in automation and reduces maintenance time. The very much larger Ship's Crew of the Nimitz is largely due to the intended significantly longer deployment endurance of the US carrier vs that of the British carriers.
** The Air Wing Crew size is as usually carried currently. This can be increased to 900 for the QE, while the Nimitz can have upto 2,500.
*** The 40 aircraft is intended as the QE's normal complement, but may be increased to 50 as designed. The Nimitz class standard air wing is currently 65 aircraft, but the carrier's total aircraft complement can be increased to as high as 85-90 through the addition of other squadron components if needed.
**** I used F-35B sorties for all of the CVs in order to compare apples-to-apples. But it should be kept in mind that aircraft such as the E-2C Hawkeye cannot be operated from smaller carriers such as the Invincible class.
***** The very great disparity between the Avtur load of the QE and the Nimitz is partly due to the Nimitz not requiring petroleum based fuel for the ships machinery.

Also, more hulls gives a greater likely-hood of having at least one available at any point in time, if one (or more) ships are out of commission - whether due to damage or planned rebuild.
 
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There are, generally, large economies of scale in ships. Larger ships need less engine power and fuel per ton of cargo, whether the cargo is containers, passengers, aircraft, or gun turrets and armor plate. Similarly, crew requirements increase much slower than the cargo capacity as you make the ship bigger.
 

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