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They were designed for the Oldsmobile gun. It's a gigantic gun. You could get something like a 5cm FlaK in the space of that gun, shortened and lightened of course. That'll do most tanks.
P-38 is the same here, also meant to receive the Oldsmobile but early in production license made Hispano were standardised.
Neither would be very stable firing such a monster. You want a light bomber for it really.
For Soviet operators an NS-37 or dump all the nose guns for twin 23mm and a ton of ammo would be good.
What is the performance of the NS-37? I guess you mean syncronise 2 23mm cannon and fire through the prop arc?
I think there was a drawing showing the various WW2-era cannons on Tony Williams site. It would help for size comparison. My personal opinion::
- MK108 should fit easily, with lots of ammo, too.
- MK103 should fit and would probably be the most powerful of the German mainstream guns. Maybe even the MG213 or one of the experimental German 50mm cannons could be fitted but they're too late to qualify. Maybe even the BK 37 would fit, but probably not.
- NS37 should fit as well, nominally this would probably be the most powerful cannon available mid-war.
The Bofors and BK.5cm fit inside that nose bay of an Me-210/410, they just had to run the breech under the cockpit floor, but provided a panel for the gunner to reload clips iirc. Have a look at the cutaway of that installation, I think it would replace the oldsmobile gun just fine. Heavier but not really bigger, and that'll help recoil anyway. You'll want some sort of suspension system with that heavy a gun though in a small fighter, plane's too light. NS45 was too heavy for a Yak despite being capable of being mounted physically no problem. Now that's some gun. Yaks aren't very big.
Yeah I meant synchronise the 23mm, shouldn't be any harder than a 2cm the case is small and it's good for bombers and soft targets. The NS37 was claimed by the Soviets to be good against Panzer III and IV upper and rear armour, it was designed to take them out. Pilots often used them in air to air but it's an anti-armour high velocity gun with a very big bang.
[Wikipedia]
"..... This happened because H.M. Poyer, designer for project leader Robert Woods, was impressed by the power of this weapon and he pressed for its incorporation though the original concept had been a 20–25 mm (.79–98 in) cannon mounted conventionally in the nose. "
You're good at this Shortround6, given an open cheque and no time worries (your lab is in an interdimensional space), what would you use?
That would leave a mark!