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NAKAJIMA Ki.43-II PERFORMANCE / TIMELINE


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#1 CORSNING

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Posted 21 August 2013 - 10:07 PM

Nakajima Ki.43-II Oscar 2

 

The following information is from T.A.I.C. report 152 dated March 1945 (some information from December 1944 report).

Altitude.Speed/Climb/Time to height.
Meters...mph/fpm/minutes to altitude.
S.L......295/3470/----
.1,000...307/3500/-1.1
.2,000...318/3575/-2.0
.3,000...329/3300/-3.0
.4,000...324/2900/-4.2
.5,000...334/2800/-5.5
.6,000...344/2750/-6.7
.7,000...342/2250/-8.0
.8,000...332/1750/-9.9
.9,000...319/1255/11.9
10,000...303/-740/----
11,000....../-240/----

Speed:

FTH in low s/c: 329 mph./2,743.9 m.
Switch low/high: 323 mph./4,115.9 m.

FTH in high s/c: 347 mph./6,189 m.

Climb:

Critical altitude low s/c: 3,590 fpm./2,439 m.

Switch low/high s/c: 2,900 fpm./3,750 m.

Critical altitude high s/c: 2,865 fpm./5,731.7 m.

Engine: Nakajima Ha.115 / 1,105 hp. take at off and 1,165 hp. @ 8,000 ft.

Combat Weight: 5,500 lbs.

Combat Ceiling: 31,000 ft.
Operational Ceiling: 34,200 ft.
Service Ceiling: 37,000 ft.

Range: 1,180 mls/145 mph/1,500 ft/ internal 149 gallons and 1,745 mls/137 mph/1,500 ft. / with maximum internal/external 257 gallons.

Armament: 2 x 12.7mm with 250 rpg OR 2 x 20mm with 150 rpg.
 

Wing Area: 230.367 sq. ft.

Wing Loading: 23.875-lbs./sq.ft.

Power Loading: 4.721 lbs./hp.

NOTE: The speed figures match those in Famous Airplanes of the World...at least as far as I know.

NOTE 2: From what I have read (C.C. Jordan) the Ki.43 could pose itself to be an even more dangerous adversary than the A6M. It had a faster roll rate and an even faster/tighter turn than the Zero. In monoplane terms, second only to the Ki.27 (and possibly A5M).

Good night Guys, Jeff.


Edited by CORSNING, 26 March 2017 - 03:36 PM.


#2 CORSNING

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Posted 02 October 2015 - 08:38 PM

                                  NAKAJIMA Ki 43 HAYABUSA (PAREGRINE FALCON) 'OSCAR'

 

12 December 1938: Ki 43 prototype 1st flight.

 

Ki 43: Pre-production aircraft: Engine: Ha-25 990 hp./T.O./2,700 rpm.   970 hp./11,155 ft. (3,400.9 m.)/2,600 rpm.

    

Ki 43-Otsu: The 8th pre-production aircraft received the 'butterfly' combat flaps (Fowler-type).

 

June 1941: Deliveries of the Ki 43-la-Ko begin to the 59th & 64th Sentai.

     Engine: Nakajima Ha-25 with a single speed supercharger.

     Propeller: Fixed-pitch, two-blade wooden propeller soon gave way to a variable-pitch metal propeller.

     Armament: 2 x 7.7 mm. type 89/500 rpg.

     Wing span: 37 ft. 6.3 in.

     Wing area: 236.805 sq. ft.

     Combat Weight: 4,515 lbs.

     Power Loading: 4.561-lbs./hp.

     Wing Loading: 19.07-lbs/sq. ft. NOTE: This is close to biplane territory.

 

June 1941: Deliveries of the Ki 43-lb-Otso begin to the 59th & 64 Sentai.

     Armament: 1 x 7.7 mm. type 89/500 rds. + 1 x 12.7 mm. Ho-103/250 rds.

 

8 December 1941: 1st combat of the Ki 43. 40 Ki 43s are now operational.

 

Ki 43-lc-Hei: Of the first 716 Ki 43s built all but the first 80 were built to Ki 43-lc standards.

     Standard armament became 2 x 12.7 mm. Ho-103 machine guns/250 rpg.

 

February 1942: five Ki 43-ll prototypes were delivered to the IJAAF.

 

October 1942: Ki 43-lla-Ko was in full production.

 

November 1942: The 1st production Ki 43-lla-Ko aircraft was completed.

     Engine: Nakajima Ha-115: 1,150 hp./T.O./2,800 rpm.   1,100 hp./9,350 ft. (2,850.6 m.)/2,800 rpm.  

     980 hp./19,685 ft. (6,000 m.)/2,700 rpm. Two-speed supercharger and 3 blade metal propeller.

     Air intake for the supercharger is installed at the upper lip of the cowling.

     13 mm. head and back armor are added.

     Layers of rubber now coat the fuel tanks.

     Slightly taller windscreen and canopy.

     A more effective reflector gun sight is installed. 

     An oil cooler was fitted under the fuselage at the rear of the cowling.

     Armament: 2 x 12.7 mm./250 rpg.

     Further wing modifications cured its tendency to collapse under high loadings.

     Wingspan is shortened by 23.6 in. and load carrying capacity of racks is increased.

     Speed (military): 329 mph./4,000 m.

     Service Ceiling: 36,750 ft.

     Range: 1,095 mls.

 

January 1943: Deliveries of the Ki.43-IIa-Ko began to the IJAAF.

 

February 1943: The last Ki.43-I rolled out of the Ota plant.

 

June 1943: Deliveries of the Ki 43-IIb-Otso.

     Various minor modifications incorporated during the production run became standardized in this model.

     Deeper "honeycomb" oil cooler under the cowling, a revised air intake for the carburetor & and

     auxiliary cooler intake beneath the fuselage were installed.

     Later in the production run the wing hard points were moved further out on the wing to prevent bombs

     from striking the propeller.

     Combat Weight: 5,710 lbs.

     Wing Area: 230.367 sq. ft.

     Power Loading: 4.965+lbs./hp.

     Wing Loading: 24.79-lbs./sq. ft.

 

June 1943: Deliveries of the Ki 43-llc (Ki 43-ll-KAI) began.

     Injector exhaust stubs were installed giving the engine a slight boost in horsepower.

 

May 1944: Work began on 10 Ki 43-lll-Ko prototypes. Tachikawa built 1,098 Ki 43-llla & two Ki 43-lllb

     prototypes.

     Engine: Nakajima Ha-115-ll: 1,190 hp./T.O./2,800 rpm.   1,230 hp./9,185 ft. (2,800 m.)/2,700 rpm.

     Combat Weight: Ki.43-IIIa: 5,644 lbs.

     Wing Area: 230.367 sq. ft.

     Power Loading: 4.589-lbs./hp.

     Wing Loading: 24.50+lbs./sq. ft.

 

Ki 43-lllb with 2 x 20 mm. cannon and a Mitsubishi Ha-112-32/42 engine: 1,300 hp.

     The war ended just before this model entered production.

 

Air International January 1980 Vol.18 No.1

 

Page 26: "...the Hayabusa also emulated the Ki27 in that its true combat element was close-in high-g

maneuvering; its controls were highly sensitive and it possessed no vicious characteristics - it could

be flown "by the seat of the pants"." "...it lacked the firepower and fuel tank & pilot protection. ...its

structure, while not fragile, was incapable of absorbing the punishment that could be meted out by

more heavily armed opponents, and it could be out-dived and out-zoomed by most Allied fighter."

 

Page 28: With the installation of the "butterfly" combat flaps (Fowler-type) on the 8th pre-production

aircraft: "...the Ki 43 was able to hold its own in most respects with the supremely maneuverable

Ki 27..." " It was found that the fighter could be looped and Immelmanned at airspeeds of 168 mph.

and lower, acceleration from low airspeeds was exceptional, stall recovery was impeccable - in a

hammerhead stall with an airspeed as low as 31 mph. indicated it gently rolled on its back and then

fell through nicely - and the "butterfly" flaps endowed the Ki 43 with an astonishing rate of turn."

 

http://www.yarchive.net/mil/ki-43.html

 

     "The Ki 43 was , in some ways, more dangerous to deal with than the A6M, chiefly because it had

a better rate of roll and was armed with two 12.7 mm. machine guns."

     "The Ki 43 had better wing loading and power loading than the Zero, had superior initial acceleration

a better roll rate and a tighter turning circle."

 

     The Ki.43 mounted a high-pressure oxygen cylinder behind the pilot's seat that had a nasty habit

of exploding if struck by enemy fire.

 

God bless all, Jeff :)


Edited by CORSNING, 26 February 2017 - 04:46 PM.


#3 Laurelix

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Posted 08 April 2017 - 12:59 AM

Ki-43's give me an unbelievable headache when it cones to finding their true performance.

 

Ki-43-I is straught forward, no problem.

495km/h at 4000m at military power

5:30 to 5000m at military power.

 

As for Ki-43-II, i instantly throw TAIC into the dumster bin and look fir legit sources.

I keep bumping into, 515km/h at 6000m and 530km/h at 4000m. i have no idea which one is correct and which is the optimal altitude. which one is wrong, which one is right or are they both correct for the altitude they state.

 

When i get to Ki-43-III Ko, its the same story.

Its eighter 550-560km/h at 5860m or 576km/h at 6680m



#4 CORSNING

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Posted 15 April 2017 - 06:57 PM

 

As for Ki-43-II, i instantly throw TAIC into the dumster bin and look fir legit sources.

For a comparison of combat ability as appose to military performance, I have not seen any

better sources.

 

I keep bumping into, 515km/h at 6000m and 530km/h at 4000m. i have no idea which one is correct and which is the optimal altitude. which one is wrong, which one is right or are they both correct for the altitude they state.

They are both correct for military power.

 

When i get to Ki-43-III Ko, its the same story.

Its eighter 550-560km/h at 5860m or 576km/h at 6680m

I haven't the time to check right now but you are probably correct, its the same story.



#5 Laurelix

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Posted 15 April 2017 - 11:33 PM

 

 

As for Ki-43-II, i instantly throw TAIC into the dumster bin and look fir legit sources.

For a comparison of combat ability as appose to military performance, I have not seen any

better sources.

 

I keep bumping into, 515km/h at 6000m and 530km/h at 4000m. i have no idea which one is correct and which is the optimal altitude. which one is wrong, which one is right or are they both correct for the altitude they state.

They are both correct for military power.

 

When i get to Ki-43-III Ko, its the same story.

Its eighter 550-560km/h at 5860m or 576km/h at 6680m

I haven't the time to check right now but you are probably correct, its the same story.

 

You said 515km/h at 6000m and 540km/h at 4000m is correct. (Japanese results)

TAIC states the optimal altitude is at 6000m....



#6 CORSNING

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Posted 16 April 2017 - 02:21 AM

You said 515km/h at 6000m and 540km/h at 4000m is correct. (Japanese results)

Military power



#7 Laurelix

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Posted 16 April 2017 - 12:30 PM

 

You said 515km/h at 6000m and 540km/h at 4000m is correct. (Japanese results)

Military power

 

I hoghly doubt that Ki-43-II would do 558km/h at WEP at 6000m. it would need 43km/h speed invrease from WEP and its a known fact that all japanese engines that dont have supercharger lose WEP at around 6000-6500m.






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