For the UK, the submarine flotilla wouldn't have been pulled from Singapore, giving much better reconnaissance of Japanese harbours.
Having the T class boats available is going to create some major changes as they were one of the main legs of what the UK was expecting to use to counter Japan. IIRC the Royal Navy some war games post-war to look at how things might have gone and it was not good for the Imperial Japanese Navy.
 
Having the T class boats available is going to create some major changes as they were one of the main legs of what the UK was expecting to use to counter Japan. IIRC the Royal Navy some war games post-war to look at how things might have gone and it was not good for the Imperial Japanese Navy.
In Sept 1939 the 4th Submarine Flotilla based in Hong Kong and Singapore had 13 O/P/R class built in the late 1920s / early 1930s specifically for action against the IJN. There was also 2 Porpoise class minelying subs with another en route (it was turned back to Britain on the outbreak of war in Europe). They had the use of the depot ship Medway which refitted at Singapore 1939/40. All these vessels were withdrawn from the Far East between 3 Sept 1939 and the outbreak of war with Italy in June 1940.

The T class were the intended successors to the O/P/R classes. The first vessel Triton was ordered under the 1935 Programme and completed in Nov 1938. Only 3 completed before the outbreak of WW2 with another 4 by the end 1939, 7 in 1940 and 6 in 1941. These were from the 1935, 1936, 1937, 1938 and 1939 War Programmes. Broadly enough to replace the O/P/R classes on a one for one basis. But 5 were lost before war with Japan broke out.

The next subs in the Far East were 2 T class dispatched from the Med to Ceylon in late Dec 1941 and early Jan 1942.
 
Having the T class boats available is going to create some major changes as they were one of the main legs of what the UK was expecting to use to counter Japan. IIRC the Royal Navy some war games post-war to look at how things might have gone and it was not good for the Imperial Japanese Navy.
Even without the Ts on top, the South China Sea was the environment the Odins, Parthians, and Rainbows were designed for, and in this scenario 4th Submarine Flotilla would have remained on station.
 
Part of Post 62.
At some point I must work out how many FAA units there might have been in 1942 based on peacetime plans. I have a sneaky feeling there would have been more spaces in carriers than the FAA actually had units to equip them.
The Number of Aircraft

504 first-line aircraft in the equivalent of 42 squadrons by 31st March 1942 according to RAF Expansion Scheme F of 1936, which was approved by the Cabinet on 25.02.36.

Page 369 of "Grand Strategy, Volume 1, Rearmament Policy" says the FAA was to have a total of 1,954 aircraft on 31.03.42 as follows:
  • 490 first-line aircraft;
  • 490 aircraft Immediate Reserve (IR) - that is 100% of the first-line strength;
  • 490 aircraft War Reserve (WR) - that is 100% of the first-line strength;
  • 484 aircraft for training purposes.
They would be operated by 8,700 RN personnel, excluding reservists and trainees.

IIRC (and I'm confident that I do) the 504 first-line aircraft were to consist of 360 carrier aircraft in 30 squadrons and 144 catapult aircraft in the equivalent of 12 squadrons. Unfortunately, I don't remember where I read it, so I can't quote the source.

However, I do have copies of Cabinet Papers from late 1937, saying that the RN had increased its requirement to 650 first-line aircraft in 50 squadrons, which I think is a rounding of 648 aircraft in the equivalent of 54 squadrons. That's because the same documents say the previous scheme was for 500 aircraft in 40 squadrons, which is obviously a rounding of 504 aircraft in the equivalent of 42 squadrons.

Unfortunately, the Cabinet Papers don't say what the mix of carrier and catapult aircraft was. I don't know what the required number of backing aircraft was either. However, based on the previous scheme it would have been 650 IR, 650 WR and 650 for training for a grand total of 2,600 aircraft.

The Types of Aircraft

The Air Branch (which was the official title of the FAA between 1939 and 1952 IOTL) would have been stuck with the types that were in service or about to enter service in September 1939 IOTL. Therefore, the fighters would have been Fulmars, Rocs, Sea Gladiator and Skuas, the strike aircraft would have been the Albacore and Swordfish and the catapult aircraft would have been the Walrus.

There would have been no combat experience between September 1939 and December 1941 to tell the Admiralty that its doctrine was faulty. So no Sea Hurricanes & Seafires.

Furthermore, as the British Aircraft industry wasn't overloaded due to not being at war for the previous 27 months and having to give priority to the needs of the RAF, no American carrier aircraft like the Martlet/Wildcat.

IOTL the first flight dates of the next generation of naval aircraft were;
27.02.42 Blackburn Firebrand.​
22.12.42 Fairey Firefly.​
29.06.41 Fairey Barracuda.​
06.02.43 Supermarine Type 322 "Dumbo".​
23.09.38 Supermarine Sea Otter.​

Firefly and Firebrand were intended to replace the fighters, the Barracuda and Albacore was intended to replace the Albacore and Swordfish, the Sea Otter was intended to replace the Walrus. ITTL the Sea Otter probably comes into service before 07.12.41 and I've no idea how 27 extra months of peace effects the development of the others. All I can say with some confidence is that the Barracuda probably goes into service with the Exe rather than the Merlin.
 
Last edited:
June 1939 Minutes of meeting held by Fifth Sea Lord responsible for Naval Aviation.

Fairey Hayes - Swordfish to be followed by Albacore with production of 400 of the latter expected to complete by Aug 1941.

Fairey Stockport - Fulmars commencing about Nov 1939 and completing about March 1941, to be followed immediately by S.24/37 (Barracuda). Latter expected to complete by April 1942.

Supermarine Woolston - Walrus expected to complete by Jan/Feb 1940. To be followed by Sea Otter completing Jan 1942.

Production rates expected to be Fulmar, 20 per month, Swordfish, Albacore & Barracuda 35-40 per month, Walrus / Sea Otter, 8 per month. In war Air Ministry expected rates could be doubled.

At that point the new fighters were being designed to Specs N.8/39 (two seat fighter replacement for Fulmar) and N.9/39 (turret fighter replacement for Roc). All change in Dec 1939 using war experience to date. Result - selection of Firefly in early 1940 & single seat Firebrand. Latter was being driven by need to defend RN shore bases as the RAF were otherwise engaged after outbreak of war.
 
Back
Top Bottom