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Naughty_17

Mitsubishi Ki-21-I ko/hei

Dont know on what majority of those data are based, but certainly some of them are wrong.

 

The wing area should not be 69.9 m2 but 69.60 m2.

All weights are not correct, empty weight was 5,105 kilograms, the standard take-off weight was 7,573 kilograms, the weight with maximum ordnance (1000 kilograms of bombs) was 7,820 kilograms. Finally, the full take-off weight for long range missions (with 2,775 liters of fuel and 500 kilograms of ordnance) was 8,412 kilograms.

Fuel weight should be 2,040 kg ( 2775 liters x 0.735 for 89 Octane aviation gasoline), the oil weight should be 168 kg ( 190 l x 0.885 for Aviation mineral oil).
 

Take-off and emergency power should be achieved at 2400 RPM, not 2200 RPM.  

The maximum speeds were recorded at rated power, not emergency (WEP) so the 432 km/h is not achieved at WEP. 

 

 

Sources : 

"Tainiji taisen no sōhatsu bakugekiki - WWII Twin-engined bombers, design with precision" by Matsuba Minoru, Kandōsha, Tōkyō 2000.

rQhnWB.jpg

" Famous Airplanes of the World - Army Type 97 Heavy Bomber" Issue No. 153 , Bunrindo 2013, Japan.

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Dont know on what majority of those data are based, but certainly some of them are wrong.

 

The wing area should not be 69.9 m2 but 69.60 m2.

All weights are not correct, empty weight was 5,105 kilograms, the standard take-off weight was 7,573 kilograms, the weight with maximum ordnance (1000 kilograms of bombs) was 7,820 kilograms. Finally, the full take-off weight for long range missions (with 2,775 liters of fuel and 500 kilograms of ordnance) was 8,412 kilograms.

Fuel weight should be 2,040 kg ( 2775 liters x 0.735 for 89 Octane aviation gasoline), the oil weight should be 168 kg ( 190 l x 0.885 for Aviation mineral oil).
 

Take-off and emergency power should be achieved at 2400 RPM, not 2200 RPM.  

The maximum speeds were recorded at rated power, not emergency (WEP) so the 432 km/h is not achieved at WEP. 

 

 

Sources : 

"Tainiji taisen no sōhatsu bakugekiki - WWII Twin-engined bombers, design with precision" by Matsuba Minoru, Kandōsha, Tōkyō 2000.

rQhnWB.jpg

" Famous Airplanes of the World - Army Type 97 Heavy Bomber" Issue No. 153 , Bunrindo 2013, Japan.

Great Hiromachi :salute: , i only can say: Pow! Right in the kisser! and bazzinga! :facepalm: .  

From a Japanese player Air Forces :kamikadze:

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