Food for thought
Radials don't have to increase the height of the hull.
Model D-9 was rated 300 hp at 1200 rpm
The bore was 150 mm 5.91 in the stroke 210 mm 8.27 in and the total displacement 1945.62 cu in
The weight was reported to be 990 lbs
Many Salmson Radials were water cooled...
Some more info I collected over the years
M4A1
Continental R975 973 cubic inches governed max rpm 2400 400 hp@2,400 rpm
5 speed 1st 7.56 2nd 3.11 3rd 1.78 4th 1.11 5th 0.73 Rev 5.56
Net Torque 940 ft lbs@1700rpm 24 mph
L53"x4W45"xH45"
M4A2
GM twin Diesel 850 cubic inches max rpm 2900...
US Strategy, such as it could be called in Vietnam, wasn't about dehousing or outright elimination of the North.
That's what the USAF&USN did in North Korea, and ran out of worth targets in a year.
North Vietnam, very, very strict RoE until 1972
South Vietnam?
'That Map Grid looks good...
Sweden had one of the best pre-war light tanks
Stridvagn L-60 M/38
Torsion bar suspension
8 tons
Later versions were uparmored and upgunned
Italy's L6/40 also used torsion bars
Problem with both, for economic reasons, didn't plan on 30 ton tanks being a requirement, and didn't have the excess...
Neutral, they will get examples of both German and Allied Armor, as Sweden did.
It would be different, but not worse.
a dual purpose 75-90mm main armament makes sense after 1941, as with sloped armor, and a big enough engine to move it all around.
But not on fighters, which I was focusing so far. Interceptors need the better props ahead of bombers.
For Bombers, even the B-18 isn't a horrible choice to bulk up numbers, as again, Douglas was selling licenses for the DC-3 to anyone with a deep enough bank account as Curtiss was for...
Which is fine, comparing that China was hardly industrialized, and India no better.
Poland, OTOH, had been building all metal monococque aircraft since the PZL P.7 in Warsaw seven years before the War started, so could do more than just final assembly from knock down kits in 1938.
Curtiss kits...
Italian presence in China
Considering the IJA attacked every other Western Power in China, so would Italy in Dec 1941
Besides sinking USS Panay, the Japanese also damaged the CL Raimondo Montecuccoli in 1937, there was some history there, with Italy far more friendly with the KMT
Italian/US...
Answer for late '30s is license built Curtiss Hawk-75. Poles just need to find the money, as Curtiss would be happy to sell. If China was able to build these, so could Poland
Faster than developing the Polish PZL.50 'Hawk', as could be in widespread squadron service by War start, since Curtiss...