Any Sources on Sea Level max speeds for the Ki-43’s?

[Laurelix]

This is what I compiled together… but honestly it's all pure estimations and if anyone knows any sources, that would be awesome, thanks.

Ki-43-I
400-410km/h at Sea Level (100%) - 870hp
418-428km/h at Sea Level (WEP) - 990hp
(495km/h at 4000-4200m at Military Power)

Ki-43-II Ko
427km/h at Sea Level (100%) - 1010hp
443km/h at Sea Level (WEP) - 1130hp
(515km/h at 6000m at military power)

Ki-43-II Kai
447km/h at Sea Level (100%) - 1010hp
464km/h at Sea Level (WEP) - 1130hp
(535km/h at 6000m, at military power)

Ki-43-III Ko
455km/h at Sea Level (100%) - 1065hp
472km/h at Sea Level (WEP) - 1190hp
(550-560km/h at 5850-6100m with WEP, depending on different Japanese sources)

 

[taly01]

Is sea level 0m or <= 1000m. I really don't know?

But official 1000m speeds are quite faster for all Ki43 models than your estimated "sea level"


**************************************************************************************************************

ソース(Source) 「キ43飛行性能表」『飛行第５９戦隊整備関係資料』防衛研究所蔵
(Library of National Institute for Defense Studies)
"Ki43 flight performance table" from "Maintanance documents relating
to 59th FR"
登録番号(registration number) 陸空-濠北方面-84

高度 最高速度 上昇力
(Alt.) (Max. speed) (Clim. speed)
1000m 463km/h 1'13"
2000m 481km/h 2'25"
3000m 498km/h 3'30"
3340m 504km/h
4000m 504km/h 4'35"
4800m 500km/h(supercharger switching altitude)
5000m 503km/h 5'49"
6000m 515km/h 7'24"
6080m 515km/h
7000m 514km/h 9'12"
8000m 508km/h 11'09"
9000m 497km/h 13'36"
10000m 478km/h 17'20"


****************************************************************************************************

一式戦闘機一型(キ43-I)「隼」の性能/Ki-43I Oscar
『「キ43」操縦の参考』より
from "Pilot Manual for Ki-43"

高度 最高速度 上昇力
(Alt.) (Max. speed) (Clim. speed)
1000m 435km/h 1'11"
2000m 457km/h 2'12"
3000m 478km/h 3'10"
3700m 495km/h
4000m 495km/h 4'08"
5000m 494km/h 5'13"
6000m 490km/h 6'21"

 

[Laurelix]

Is sea level 0m or <= 1000m. I really don't know?

But official 1000m speeds are quite faster for all Ki43 models than your estimated "sea level"


**************************************************************************************************************

ソース(Source) 「キ43飛行性能表」『飛行第５９戦隊整備関係資料』防衛研究所蔵
(Library of National Institute for Defense Studies)
"Ki43 flight performance table" from "Maintanance documents relating
to 59th FR"
登録番号(registration number) 陸空-濠北方面-84

高度 最高速度 上昇力
(Alt.) (Max. speed) (Clim. speed)
1000m 463km/h 1'13"
2000m 481km/h 2'25"
3000m 498km/h 3'30"
3340m 504km/h
4000m 504km/h 4'35"
4800m 500km/h(supercharger switching altitude)
5000m 503km/h 5'49"
6000m 515km/h 7'24"
6080m 515km/h
7000m 514km/h 9'12"
8000m 508km/h 11'09"
9000m 497km/h 13'36"
10000m 478km/h 17'20"


****************************************************************************************************

一式戦闘機一型(キ43-I)「隼」の性能/Ki-43I Oscar
『「キ43」操縦の参考』より
from "Pilot Manual for Ki-43"

高度 最高速度 上昇力
(Alt.) (Max. speed) (Clim. speed)
1000m 435km/h 1'11"
2000m 457km/h 2'12"
3000m 478km/h 3'10"
3700m 495km/h
4000m 495km/h 4'08"
5000m 494km/h 5'13"
6000m 490km/h 6'21"

Thanks
So it would be more like...

Ki-43-I
414kph at Sea Level - 870hp
432kph at Sea Level - 990hp

Ki-43-II Ko
445kph at Sea Level - 1010hp
462kph at Sea Level - 1130hp

Ki-43-II Kai
464kph at Sea Level - 1010hp
482kph at Sea Level - 1130hp

Ki-43-III Ko
472kph at Sea Level - 1065hp
490kph at Sea Level - 1190hp

 

[Laurelix]

It's also funny how TAIC isn't able t

Is sea level 0m or <= 1000m. I really don't know?

But official 1000m speeds are quite faster for all Ki43 models than your estimated "sea level"


**************************************************************************************************************

ソース(Source) 「キ43飛行性能表」『飛行第５９戦隊整備関係資料』防衛研究所蔵
(Library of National Institute for Defense Studies)
"Ki43 flight performance table" from "Maintanance documents relating
to 59th FR"
登録番号(registration number) 陸空-濠北方面-84

高度 最高速度 上昇力
(Alt.) (Max. speed) (Clim. speed)
1000m 463km/h 1'13"
2000m 481km/h 2'25"
3000m 498km/h 3'30"
3340m 504km/h
4000m 504km/h 4'35"
4800m 500km/h(supercharger switching altitude)
5000m 503km/h 5'49"
6000m 515km/h 7'24"
6080m 515km/h
7000m 514km/h 9'12"
8000m 508km/h 11'09"
9000m 497km/h 13'36"
10000m 478km/h 17'20"


****************************************************************************************************

一式戦闘機一型(キ43-I)「隼」の性能/Ki-43I Oscar
『「キ43」操縦の参考』より
from "Pilot Manual for Ki-43"

高度 最高速度 上昇力
(Alt.) (Max. speed) (Clim. speed)
1000m 435km/h 1'11"
2000m 457km/h 2'12"
3000m 478km/h 3'10"
3700m 495km/h
4000m 495km/h 4'08"
5000m 494km/h 5'13"
6000m 490km/h 6'21"

Do you know by any chance how i could access the source directly?

 

[taly01]

I got them from here WW2航空機の性能:WarbirdPerformanceBlog its a Japanese site where he has been researching National Archives Library of Japan digitised records, that are online アジア歴史資料センター

For the Ki43-II article Reference code: A03032127200 appears as

国立公文書館 アジア歴史資料センター

アジア歴史資料センターは、近現代（1860年代から1945年前後）の日本とアジア近隣諸国との関係に関わる歴史資料（目録・画像）をインターネット上で提供する電子資料センター（データベース）であり、国立公文書館で運営されています。

www.jacar.archives.go.jp

It appears to be a series of test trials by the 59th Sentai of a Ki43-II(initial), it even includes opinions on the 12.7mm shell casings and gun chamber dimensions! Have Fun!