The Aircraft Carrier War

[Art]

There has only been one aircraft carrier war, World War II in the Pacific where two roughly equal Carrier fleets fought each other in six major battles between the Spring of 1942 and the Fall of 1944. This will take the form of a series of posts on the ships, the aircraft and the men. and the battles. It's going to be in thumbnails of course.

One thing is important to the outcome. The Japanese didn't just have to win every battle, they had to win every battle decisively. No close, wins, not even too many not close wins and they knew it. The Americans had to be forced to terms within a year, preferably six months and to do that the Japanese would have to administer some hellacious wins.

[Art]

The Ships, Japanese

The ships here all saw action in 1942. More would be added later in time for the 1944 battles and others would be completed after the Japanese Naval Air Arm had ceased to exist and bobbed around in the Sea of Japan under regular attack or were expended as fast transports.

The British invented the Aircraft Carrier, they also invented virtually every major innovation including the arrestor gear, angled deck, mirrored landing system, ski jump assist for loaded VSTOL aircraft and on and on. But...to them for a long time the carrier was a scout. It only later became a true weapons platform.

The Japanese, denied new capital ship tonnage, by naval treaties cast about for a way to catch up. They had built an experimental carrier in 1922, the Hosho of 7420 tons, with a capacity of 11 aircraft and a speed of 25 knots so they had a bit of a handle on what they might need. The Tactical unit was to be the fast carrier task force (Kido Butai) which would be armed with bombers and fighters projecting them over long distances at high speed to engage targets on land and sea.

Thanks to the treaties all major nations had hulls from battleships and battlecruisers on had scheduled to be scrapped. These hulls had the advantage of being large, sometimes very large, but their capital ship origins sometimes limited their aircraft capacity depending on the state of completion when converted

Oh, to be truly effective as a fleet unit a speed of at least 26 knots was needed, some of these converted ships, and the Japanese converted a lot, were marginal on speed.

These are the ships that fought in the 1942 battles in order of appearance excepting Hosho of course. Only heavy CV and light CVL ships are included, no escorts, CVE. Post 1942 ships will be added in a later post.

CV Akagi, converted battlecruiser 1927
41,300 tons
31 knots
91 aircraft

CV Kaga, converted battleship 1928
28 knots
45,541 tons
90 Aircraft

CVL Ryujo 1929
29 knots
12,732 tons
38 Aircraft

CV Soryu Class 1937-39
Hiryu
34 knots
18,880 tons
71-73 Aircraft

CVL Hosho Class 28 knots, converted sea plane tenders
Zuiho
30 aircraft
11262 tons

CV Shokaku Class, 34 knots 1941
Zuikaku
29,000 tons
34 knots
84 aircraft

CVL Ryuho 1942 Coverted sub tender
13,360 tons
26 knots
31 aircraft

CV Hiyo class, 1942 converted ocean liners
Jun'yo
26,949 tons
26 knots
53 aircraft

8 CV, 5 CVL

[Art]

The American Ships available in 1942

They usually were more efficient ships (with exceptions) carrying more aircraft on smaller displacements. The US used no CVL in the early war years.

CV Lexington Class 1920-27 converted battlecruisers
Saratoga
37,000 tons
34 knots
90 aircraft

CV Ranger 1930 (spent much of the war in the Atlantic)
14578 tons
29 knots
86 aircraft

CV Yorktown Class 1937-40
Enterprise
Hornet
20,000 tons
32 knots
90 aircraft

CV Wasp 1940
15,000 tons
29 knots
90 Aircraft

7 CV total

The American deficiency in numbers of carriers would be an issue all through 1942

[dryheat]

The Brits invented all that? I'm not sure how I feel about the ski jump ramp takeoff.
The only carrier war is for sure. I kind of wonder about any battle ships now a days.
Do we even call them Battleships anymore? They had a big word for them back then. Started with a D.

[Art]

The Brits invented all that?

They also invented the steam catapult.

[jon_norstog]

There has only been one aircraft carrier war, World War II in the Pacific where two roughly equal Carrier fleets fought each other in six major battles between the Spring of 1942 and the Fall of 1944. This will take the form of a series of posts on the ships, the aircraft and the men. It's going to be in thumbnails of course.

One thing is important to the outcome. The Japanese didn't just have to win every battle, they had to win every battle decisively. No close, wins, not even not close wins and they knew it. The Americans had to be forced to terms within a year, preferably six months and to do that the Japanese would have to administer some hellacious wins.

Supposedly Yamamoto told the government that he could attack the US, but if he did they had six months to win the war. If they didn't do that they would lose. I once found a "Navy League" magazine from 1940 with an editorial spread urging the Navy to build as many BBs as as possible, soon as possible, and not a word about carriers. They were lobbying Congress pretty hard. Fortunately they didn't get their way.

jn

[Art]

The Aircraft - Japanese

The Nakajima B5N Kate Carrier Attack Plane
Crew: 3 - Pilot, Navigator-Aircraft Commander-Bombardier, Radio Operator -Gunner
Speed: 235 MPH
Range: 600 miles
Armament: One or two 7.7 mm Machine Guns firing forward. 1- 7.7 mm Lewis Gun rear. 1 Type 91 Torpedo, or 1 - 1760 pound A.P. bomb, or 2 - 250 pound bombs, or 6 - 132 pound bombs.

The best aircraft of its type in the first half of 1942, and at least adequate through 1943; though the Japanese were already working on its replacement. Like most Japanese aircraft it did suffer from flamibility. It can not be mentioned without talking about the Type 91 Torpedo it carried and was modified throughout the war; stable, reliable, with a shallow drop depth and capable of being dropped at the top speed of the aircraft from over 300 feet, like the "Long Lance" it was in a class by itself. All other torpedo bombers were tied to some variation of the 100 - 100- 1,000 rule mandating a drop at 100 mph, at 100 feet at 1,000 yards.

The Aichi D3Y "Val"
Crew: 2 - Pilot, Radio Operator/Gunner
Speed: 270 MPH
Range: 840 miles
Armament: 2 7.7 mm firing forward, 1 7.7 Lewis Gun rear. Bombs 1- 550 lb bomb and 2 - 132 pound bombs (optional)

Because of its ruggedness and maneuverabilty the Val was sometimes used in the Combat Air Patrol (CAP.) In 1942 the Japanese were looking to replace it because of its relatively light bomb load. Like its counterpart the American SBD Dauntless it would sink more enemy ships, alone or with others, than any other navy aircraft type.

The A6M2 (Type 0 Model 21) Zero Zeke
Speed: 330 mph (345 mph W.E.P.)
Rate of climb: 3,100 ft/min
Range: 900 miles
Armament: 2 7-7 mm machine guns, 2 - 20 mm cannon.

The best carrier fighter of 1942 by a wide margin and capable of competing with any land based opponent, it's extreme range made it the first true long range escort fighter. This extreme range also gave it a very long "loiter" time in the CAP. It was not without flaws, very fragile it had a never exceed speed of only 370 mph. A note on War Emergency Power (W.E.P.) Fighters in WWII had the capability of temporarily increasing top speed by over revving the engine or injecting something, usually an alcohol mixture into the fuel. This could only be done for short periods and was closely monitored as it was damaging to the engine and required increased maintenance. Japanese fighter aircraft top speed was always shown by them as maximum combat power even though W.E.P. was available on all of them.

In addition both sides used numbers of obsolescent or sometimes downright obsolete in combat in 1942. One example is the A5M Claude fixed under carriage carrier fighter which was being fielded in limited numbers on carriers and and larger numbers on land bases well into 1942.

Japanese naval aircraft had a range advantage with their aircraft which gave him a first punch advantage should they find you first for the entire war.

[Art]

Supposedly Yamamoto told the government that he could attack the US, but if he did they had six months to win the war. If they didn't do that they would lose. I once found a "Navy League" magazine from 1940 with an editorial spread urging the Navy to build as many BBs as as possible, soon as possible, and not a word about carriers. They were lobbying Congress pretty hard. Fortunately they didn't get their way.

jn

He almost surely said words to that effect. But once war was on he was all in.

[bruce]

It is what it was. The US was not prepared for war. The Japs had already been at war in China which provided them an excellent opportunity to develop equipment/tactics, etc. Their pilot development was inadequate to replace losses. Their various types of airplanes were not so hot once the US began to develop up to date planes. Lack of self-sealing gas tanks and armor forced the Japs to pay a high price in unsustainable losses. There really was no excuse for the poor quality torpedos first used by the US. Got to wonder why development was not informed by examination of Jap and German torpedos. There is more but this is a start. Sincerely. bruce.

[Art]

It is what it was. Got to wonder why development was not informed by examination of Jap and German torpedos. There is more but this is a start. Sincerely. bruce.

Japanese torpedoes were a closely guarded state secret. We actually knew a torpedo could be oxygen fueled but the fear of the hazards involved kept us from making one. Our "surprise" at the torpedoes was fueled by, among many other things, racism, as well as the Japanese wisely understating the performance of almost every thing they could. We were so in denial about it we discounted their capabilities for almost a year after encountering them. It might have helped if we had actually tested our torpedoes but made an executive decision that they were too expensive to expend in tests !!! Then to add insult to injury the Navy Bureau of Ordnance refused to even consider defects for almost a year blaming all problems on "operator error" and prohibiting troubleshooting.

I had a friend who once told me a Long Lance ship launched (our name for it when we figured it out) compared to ours destroyer torpedoes at the start of the war like a JDAM to a firecracker.