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Do you happen to know what power output and altitude the 680 Kph was achieved with?
Ah i see, 673-674 would represent high quality version such as the prototype but the average quality Ki-84 with unqualified labour at the end of ww2 would do around 650-660.According to data in my hands,
The Ki-84 was designed for the maximum speed of 680km/h at the altitude 5,000 meters with 100 octane fuel.
Actual tested maximum speed with 91 octane fuel was various like 614km/h (alt. 5,000 meters), 640km/h (6,000 meters), 631km/h (6,120 meters) and 660km/h (6,000 meters) as it depended on the testing condition as well as the pilot's skill. Field pilots testified the average maximum speed was around 650 to 655km/h and some times more. No time to check the engine type but most of the data are based on the Ha-45-21.
According to data in my hands,
The Ki-84 was designed for the maximum speed of 680km/h at the altitude 5,000 meters with 100 octane fuel.
Actual tested maximum speed with 91 octane fuel was various like 614km/h (alt. 5,000 meters), 640km/h (6,000 meters), 631km/h (6,120 meters) and 660km/h (6,000 meters) as it depended on the testing condition as well as the pilot's skill. Field pilots testified the average maximum speed was around 650 to 655km/h and some times more. No time to check the engine type but most of the data are based on the Ha-45-21.
The army planned the engine Ha-45 of 2,000hp for the maximum speed of 680km/h at the altitude 5,000 meters with 100 octane fuel.
If the super-charger doesn't use a fluid drive, then HP figures would slowly decrease after FTH was reach in the 1st gear, until the 2nd gear was engaged. The HP curve would show after FTH in 1st gear a decrease in HP; just like any other 2 speed gear driven supercharger in use by other countries, for a couple thousand feet or so before the 2nd gear would be engaged.
did this engine get into use for the likes of the Ki-84? ive always read that these engines needed 100 oct to not have knocking so this is interesting to read.The Ha-45-21 engine was redesigned so that it could generate 2,000hp with 91 octane fuel by adopting the water-methanol injection system.
did this engine get into use for the likes of the Ki-84? ive always read that these engines needed 100 oct to not have knocking so this is interesting to read.