Mike Solli
Posts: 15792
Joined: 10/18/2000 From: the flight deck of the Zuikaku Status: offline
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I know what you mean, Cribtop. 1 Jan 42 Aircraft & Engine Update While waiting for my turn (and the fate of CarDiv 2), I thought I’d assess the state of my airframe and engine production as well as look ahead 6 months to see what changes will need to occur. I’ll do it by engine type since that seems to make the most sense to me. Hitachi Amakaze This engine is used for the Glen. I was given advice to build out the pool as quickly as possible to free up the Glen factory for other uses. Taking this advice, I increased the Glen factory to 20. Currently, there are 19 Glens in the pool. The engine pool is 108, so this should take about 5 months to complete. Nakajima Hikari This engine is used only for the B5N1 Kate. I built up a Kate factory to size 16 and will use up the engines. There are currently 88 in the pool. There are 84 Kates in the pool, which is a lot, but I’ll continue to build them until I empty the engine pool. Then I will be able to convert the Kate factory to something else. Nakajima Ha-5 This engine is used only for the Ki-57-I. I am using up the engines for this aircraft. The airframe factory size is 20 and the engine pool is 79. The engines will be consumed in about 2 months, allowing the airframe factory to upgrade. This brings us to….. Mitsubishi Ha-31 This engine is used for the Ki-46-II, which has a monthly production of 20. In Mar 42, the Ki-57-II comes online. I will not upgrade the Ki-57-I to the –II until all of the Ha-5 engines are consumed. At that point, I’ll upgrade. I suspect that there will be a large number of the -I in the pool so the –II probably will not begin producing for a while after it comes online. Currently, the engine production is at +5 need and the pool is 257. I am going to shut it down until the pool drops to 100. That will save 720 HI a month. There is not a great need for this engine throughout the war. In May 43 the Nick FB comes online and in Apr 44 the Nick NF comes online. I don’t expect to produce many of either plane. In addition, when the Dinah upgrades to the –III, the engine requirement changes, reducing the need for this engine further. Mitsubishi Ha-32 There is a substantial need for this engine. The Betty series and Sally series use it throughout the war. In addition, the Emily comes online in Jul 42, which will probably use 40 engines a month. The Jill, Jack and Francis series also will use them throughout the war. I expect to increase production on this engine periodically throughout the war. Currently production is at 100, -40 need with a pool of only 12. I am going to increase the engine factory by +50 to give me a 10 engine surplus per month. When the factory increase is complete, I will re-assess. Mitsubishi Ha-33 The need for this engine will increase over time. Currently, this engine is used for the Val, Jake, Nell, Mavis and Tina. In Apr 42, the H6K2-L factory will come online, but few of these will be produced. Later in the war, the Judy, Tabby, Dinah –III, Ki-100 Tony and Randy series will need this engine. Also, the A6M8 will use it if Ted doesn’t surrender by then. In the short term, there is a shortage of 84 engines a month, assuming 100% production from all current airframe factories. Given its need later in the war, I will increase production by 90 now and reassess around Dec 42, when the Dinah –III comes online. By then, a nice pool should exist. Mitsubishi Ha-34 There is currently no need for this engine. Production is at 10 with a pool of 10. I am increasing it by 150 for the onset of Helen production in Apr 42. The only other airframe that needs this engine is the Tojo series, which begins production in Sep 42. I will increase production to support this airframe, which I plan to use in abundance. I estimate production of the Tojo to be 60-80, which will increase the engine production by that same amount. The monthly requirement for this engine may be as high as 240 by the end of 1942. Fortunately, it shouldn’t increase after that. Mitsubishi Ha-35 Currently, I’m in good shape with the mother of all engines. Once all factory increases are complete (in 8-26 days), there will be a surplus of 12 engines per month. That’s assuming the Ki-48 is producing, which is not a given. The Ki-48 is currently off. While the Lily is off, the engine surplus is 80 per month. With a nice surplus of 141 engines currently, I’m in good shape. Many more engines will be needed though, as there are many important aircraft that will use it. This includes the Zero series and Oscar series. Other minor aircraft include the Kate (until the Jill comes online), Irving, C5M2 Babs, and Lily. I don’t expect to produce the Lily much more, if at all though. It all comes down to the number of Zeros and Oscars that will need to be produced. Here’s the rollup: Ha-32: +50 Ha-33: +90 Ha-34: +150 Ha-31: Off for ~4 months Ki-48-Ib: Off for ??? – possibly indefinitely.
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