Ki-43-I Ko – BR I
Loaded Weight: 2243kg
Engine: Ha-25 (950-990HP)
Wing Area: 22.00m2
Max Speed:
414km/h at Sea Level (100%)
495km/h at 4000m (100%)
Time to 4000m: 4:08 (100%) [16.13m/s avg]
Turn Time: 12-13 Seconds
Armament:
2x 7.7mm Type 89 MG’s (1000 rounds total)
2x 30kg bombs
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Other Hayabusa’s
Ki-43-II Ko – BR II
Loaded Weight: 2590kg
Wing Area: 21.4m2
Engine: Ha-115 (1130-1150HP)
Max Speed:
445km/h at Sea Level (100%)
504km/h at 3350m (100%)
515km/h at 6000m (100%)
Time to 5000m: 5:49 (100%) [14.33m/s avg]
Turn Time: 15 Seconds
Armament:
2x 12.7mm Ho-103 (540 rounds total)
2x 100kg bombload
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Ki-43-III Ko – BR III
Loaded Weight: 2725kg
Engine: Ha-115-II (1190-1210HP)
Max Speed:
490km/h at Sea Level (WEP)
555km/h at 6000m (WEP)
Time to 5000m: 5:19 (100%) [15.67m/s avg]
Turn Time: 15-16 Seconds
Armament:
2x 12.7mm Ho-103 (540 rounds total)
2x 250kg bombload
Note:
Key difference between Ha-115-II and the original Ha-115 is the introduction of Water-Methanol Boost.
Ki-43-I and Ki-43-II can only WEP for 1 minute whilst Ki-43-III can WEP for 10 mins and then only have 1 min of WEP left after using up W/M boost. After that its forced to use military power at best and becomes a slighlty better Ki-43-II. Hencewhy the Ki-43-I / II speeds are stated at 100% power and the Ki-43-III which can actually WEP uses WEP speeds.
Ha-115 only has 1 min of 1130 Horsepower regimes, otherwise it flies at best at 1010 horsepower
Ha-115-II can actually WEP so it flies with power of 1190-1210 Horsepower, even without WEP it gets 1065 horsepower which is slightly better. Ki-43-III Ko is superior to A6M5 in every way in flight performance (especially climb rate and roll rate) except basically the firepower, but the bombload sure is better on Ki-43.
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Ki-43-III Otsu – BR III Gold Order
Identical to Ki-43-III Ko but has 2x 20mm cannons which needed the nose to be modified and then to fix centre of gravity due to heavier nose, they also had to add weights to its rear. This resulted in a more draggier plane due to nose bulges for the cannons and worse climb rate and turn rate due to extra weight. Due to the performance drop the plane didnt go beyond the prototype stage however it does offer better firepower.