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Maybe Long Lance torpedoes, .
Part of the problem/s with the He 100 is however brilliant it may have been in 1938-39 in fitting 1000 ML in a one liter bottle the year 1940 saw the requirements change.
You are now trying to fit 1250ml into the 1 liter bottle.
The He 100 fuselage was small, smaller than a 109. Fuel tanks have to go in the wings. Wing roots hold guns so tanks are forced even further out into thinner parts of the wing. No He 100 had self sealing tanks. With small fuselage tank the fuel capacity was decent but you can't put in protected tanks without reducing the fuel capacity.
Japanese need for short ranged fighter?
He 100 needs more than a conventional radiator, it needs a conventional oil cooler. Where did the speed go??????
He 100 had crap for armament (did they ever get the 20 mm gun to work?) and without it you have the armament of a KI 43 with two 7.7mm guns.
Part of the brilliance of the HE 100 design was using the cowl as part of the stressed engine mount to save weight and volume. Changing to a radial engine means you need a conventional engine mount. some of the weight savings just went away.
and for more mundane considerations, landing and take-off speeds. This thing is going to land and take-off like a KI-44 except it doesn't have the Ki 44 flaps.
The surface fleet was a total waste of time, talent and treasure. No, it's not a perfect one for one conversion, but the steel that went into Bismarck and Tirpitz could have instead made thousands of tanks or hundreds of U-boats.
Nazi doctrine is about taking the USSR, battleships and carriers don't contribute to that. U-boats? Yes, because in greater number they'll effectively subdue convoys to the USSR so it can be defeated. >200,000 tons of additional u-boats will be a lot more effective than the four capital ships the Germans built and the planned carriers.
Did the Japanese or Italians have any submarine tech the Germans could use? Japanese Long Lance of course, but what of construction, materials, propulsion, batteries, radios, habitation, endurance, etc?
I'm not so sure about that. Considering how much time, treasure, effort, lives, expended by the traumatizing effect of the Tirpitz just laying about in the fjords waiting , all the resources of the RN tied up keeping the ship from getting out into the North Atlantic, etc. it seems like the Tirpitz did it's job fairly well. All of the Admiralty was certainly wound up about it, all the way to Churchill himself. Carrier raids, midget submarines, countless bombing strikes, keeping the Home Fleet at home (just in case the Tirpitz did steam outside the fjord).
It seems to me that the Tirpitz, for all it's lack of real naval seapower exploits, did a marvelous job living inside the Admiralty's head rent-free, and tying up resources to a fare-thee-well. All of those resources could have been used chasing after Uboats or trying to shut down the Luftwaffe's Northern contingent, attacking German airfields in Norway, or perhaps working in the Med.
Just the threat of the Tirpitz and it's auxilliary craft kept the RN pretty busy for quite a long time. That's hardly a total waste.
That is the whole theory of a "fleet in being";
Fleet in being - Wikipedia
Which many armchair (or computer desk chair) admirals/sea lords want to throw away and use the 'saved' resources in other ways.
If Germany stops building capitol ships in 1935/36 does the RN build all five KGVs?
How much fuel oil is saved if the RN is not using one or two battleships as distant escorts for North Atlantic or Russian convoys?
Germans build more U-boats in the late 30s (breaking the treaties) The RN builds more destroyers or escorts.
The Tirpitz even attracted the Ranger (CV-4) at one point.I'm not so sure about that. Considering how much time, treasure, effort, lives, expended by the traumatizing effect of the Tirpitz just laying about in the fjords waiting , all the resources of the RN tied up keeping the ship from getting out into the North Atlantic, etc. it seems like the Tirpitz did it's job fairly well. All of the Admiralty was certainly wound up about it, all the way to Churchill himself. Carrier raids, midget submarines, countless bombing strikes, keeping the Home Fleet at home (just in case the Tirpitz did steam outside the fjord).
It seems to me that the Tirpitz, for all it's lack of real naval seapower exploits, did a marvelous job living inside the Admiralty's head rent-free, and tying up resources to a fare-thee-well. All of those resources could have been used chasing after Uboats or trying to shut down the Luftwaffe's Northern contingent, attacking German airfields in Norway, or perhaps working in the Med.
Just the threat of the Tirpitz and it's auxilliary craft kept the RN pretty busy for quite a long time. That's hardly a total waste.
Outfitting the Italians with captured French gear makes a lot of sense. Historically, they operated the D.520 from captured Vichy French stocks, in 1943. That is obviously too late to matter, so the armistice needs to specify that Italians get as much of the stuff they lack (basically - everything...).
D.520 was supposed to be well suited for the mass production, in stark contrast vs. probably every Italian design, fighters included. Tooling from H-S should be shipped to A-R, or Fiat, or Isotta-Fraschini.
I'd also ship the tooling for the G&R 14R engine to Italy (to Fiat or to Piaggio), trying to stick it in the Re.20OX series of fighters, or the future G.55 (it was G.58 to be powered by the Fiat's big radial).
Tanks and AFVs are another badly needed item, be it as-is or suitably modified for Italian needs.
In my opinion the Italian should strike a deal with both Germany and France for that to happen,the idea is mobilizing France industry to supply Italian War effort,maybe this will even result in French 4 engine strategic bomber in service of Germany.
But shipping France machine tools to Italy might not be optimal instead of letting Italy produce some designs under license.
Another idea i have for a long time is equipping large portion of Italian force with French gears, Make up for the shortcoming of the airforce with Dewoitine D.520 and equip their armored force with Somua cavalry tank these are superior to Italy early war equipment and the Germans must let French industry run it course and upgrade their equipment Dewoitine D521/530 equipped with DB601 and belt fed Hispano would be awesome as well as Somua S40 armed with KWK39.
That is the whole theory of a "fleet in being";
Fleet in being - Wikipedia
Which many armchair (or computer desk chair) admirals/sea lords want to throw away and use the 'saved' resources in other ways.
If Germany stops building capitol ships in 1935/36 does the RN build all five KGVs?
How much fuel oil is saved if the RN is not using one or two battleships as distant escorts for North Atlantic or Russian convoys?
Germans build more U-boats in the late 30s (breaking the treaties) The RN builds more destroyers or escorts.
Maybe I look at the slats and think the Seafire could use that.