Very interesting read...
This is what I can say about the Ki-84 Hayate (Gale)
The specs:
Type:
Single-seat interceptor and fighter-bomber
Origin: Nakajima
Allied Code Name: Frank
First Flight: N/A
Service Delivery: Summer 1944
Final Delivery: N/A
Number Produced: 3,514
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Engine:
Ki-84 Ia:
Model: Nakajima Ha-45
Type: Radial piston engine
Number: One Horsepower: 1,900 hp
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Dimensions:
Wing span: 36 ft. 10½ in.(11.24m)
Length: 32 ft. 6½ in. (9.92m)
Height: 11 ft. 1½ in. (3.39m)
Wing Surface Area: 226.05 sq. ft. (21m²)
Weights:
Empty: 5,864 lbs. (2660 kg)
Max. Take-Off: 8,576 lbs. (3890 kg)
Performance:
Maximum Speed: 392 mph (631 km/h) at 20,080 ft.
Initial climb: N/A
Service Ceiling: 34,350 ft. (10,500m)
Range: 1,347 Miles (2168 km)
Endurance: N/A
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Armament:
Ki-84-Ia:
Two 12.7mm machine guns.
Two 20mm Cannon.
Ki-84-Ib:
Four 20mm Cannon.
Ki-84-Ic:
Two 30mm Cannon.
Two 20mm Cannon.
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Bomb Load:
Ki-84-Ia:
Wing racks for two 551 lb (250 kg) bombs
SOURCE:
Warbirds Resource Group Being new to AH I will say that I agree with you about AH needing more early war stuff as opposed to late war, and this is NOT a slam on AH or the gameplay here. It has been QUITE successful to an onlooker up to this point, but up to this point with no RPS I have only seen the planes you mention earlier in this thread in the air, (la7, nik, spit, and typh, P51) so if this would only add an other "player" in that group. I welcome it. For any events that are held in the PTO, this plane is a MUST have I would think...There are special events here right? I will ask about that in an other thread.
FWIW, I have seen this A/C in "other" sims, but it was not the UBER plane you make it out to be, nor should it be if modeled correctly IMO. I guess in the end I fall prone to this, MORE PLANES=BETTER FLIGHT SIM (if the modeling is done correctly) but that is just me. Your milage may vary at home.

Interesting stuff.....