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Manifold pressure sucks?

Biggest issue the Japanese had with engines was metallurgy, not an issue with their technology so much as resources. Also they did not generally have the high octane gasoline that was available in the USA.

Cheers: T
 
Part of the problem was that the Japanese were drafting the skilled employees in the aircraft industry into the military. When the folks doing the manufacturing don't know what they are doing, things go downhill really fast.

The Japanese standard for aircraft fuel was 92 octane in the Navy and 91 octane in the Army. Their engines if built and maintained correctly COULD achieve the advertised performance with this fuel.
I saw a report at one point which showed that fuel drained from captured aircraft was testing out to more like 94-95 octane instead of 92 as expected.

The problems with actually doing this were the fact that a lot of their maintenance people were lost in combat especially in New Guinea. Another reason was that by the end of the war, the folks even on the home islands were combining their remaining fuel with pine root oil to extend it. The result was probably around 80-something octane.

Sounds like we are in pretty close agreement.

Now, when we build a WW2 Japanese aircraft, what level of performance should we give it????

- Ivan.
 
Just to clear up a minor misunderstanding much earlier, the max speed value (in the cfg) is a structural value and is not directly related to the max achievable speed in level flight.



Cheers. T
 
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