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ElBarca

Kawasaki Ki-61-I ko

the hei feels pretty good to me right now :dntknw:  it can fight mustangs and everything else no problem.

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the hei feels pretty good to me right now :dntknw:  it can fight mustangs and everything else no problem.

Except its based on Tei. The data which were used most likely come from Famous Airplanes of the World Issue #17. But even Model Art Issue #428 indicates the differences properly :

Kl8T4e.png

In the meantime the Passport was based on Tei, which is completely different variant. 

 

Для модификации Hei:

Основные Геометрические и регулировочные данные:

Рамах крыла —  12м

Длина — 8,74м

Высота — 3,7м

Площадь крыла с элеронами - 20 м²

Вес — 2238кг (Hei -2630кг.)  

Вес топлива — 396 кг (Hei - 420 кг.)

Вес масла – 32 кг

Взлетный вес — 2982kg/кг (Hei-3470 кг.)

Показатели максимальных скоростей:

Максимальные обороты (WEP), створки радиатора закрыты.

 

Высота М.                                     Скорость км/ч (S.P.D).

  5000                                                           580

 

Показатели скороподъемности:

Максимальные обороты 100%, створки радиатора открыты. I.A.S 280км/ч

 

Высота М.                                                      время набора высоты минут

   5000                                                                                    7

Its slightly slower than Ki-61 Ko/Otsu, but more importantly its climb rate, turn time and stalls are not  even close to earlier models.

 

Ki-61-I Hei                                 if compared to                        Ki-61-I Otsu stalls  :

- clean – 169 km/h--------------------------------------------------------- 157 km/h
- combat flaps – 160 km/h------------------------------------------------ 149 km/h
- landing flaps – 150 km/h------------------------------------------------ 140 km/h
- landing flaps and gear down – 150 km/h---------------------------- 140 km/h

The stall performance difference is not that significant, although even Ki-61-I Otsu is not correct. The stall in US test, in landing condition occurred at 115 km/h (72 mph), though it has to be remembered  that  plane was a bit lighter than standard model, but still it is 25 km/h higher than tests indicated - http://www.wwiiaircraftperformance.org/japan/Tony-I.pdf

 

The biggest difference seems to be in sustained turn - Ki-61 Otsu 18 seconds turn time while Ki-61 Hei 22 seconds. 

To compare I managed to get 17 seconds of sustained turn for F6F-3.

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Except its based on Tei. The data which were used most likely come from Famous Airplanes of the World Issue #17. But even Model Art Issue #428 indicates the differences properly :

Kl8T4e.png

In the meantime the Passport was based on Tei, which is completely different variant. 

Its slightly slower than Ki-61 Ko/Otsu, but more importantly its climb rate, turn time and stalls are not  even close to earlier models.

 

Ki-61-I Hei                                 if compared to                        Ki-61-I Otsu stalls  :

- clean – 169 km/h--------------------------------------------------------- 157 km/h
- combat flaps – 160 km/h------------------------------------------------ 149 km/h
- landing flaps – 150 km/h------------------------------------------------ 140 km/h
- landing flaps and gear down – 150 km/h---------------------------- 140 km/h

The stall performance difference is not that significant, although even Ki-61-I Otsu is not correct. The stall in US test, in landing condition occurred at 115 km/h (72 mph), though it has to be remembered  that  plane was a bit lighter than standard model, but still it is 25 km/h higher than tests indicated - http://www.wwiiaircraftperformance.org/japan/Tony-I.pdf

 

The biggest difference seems to be in sustained turn - Ki-61 Otsu 18 seconds turn time while Ki-61 Hei 22 seconds. 

To compare I managed to get 17 seconds of sustained turn for F6F-3.

 

So the power to weight ratio on the hei is completely wrong? It should be slightly worse than the otsu, correct?

Edited by SubRyan
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Could be even marginally better or at least equal, all depends which Otsu you would pair against. The one with 4th  200 l internal fuel tank or the one with lowered wing fuel tanks capacity and without 200 l fuel tank.

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If I remember correctly ElBarca insisted that the Ki-61-I-Hei weight was right. Had you forwarded the issue to the devs?

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