| Aren't we talking absolute pressure? That 31.5 is absolute as is Manifold Pressure, right?. Doesn't that mean you need something like 3 inches above ambient to pressurize the cabin on the ground? So, at 25,000 you still need 3inches above absolute (cabin absolute if pressurized) and if you pull power back you lose the differential.
So, if this is right, at 25,000, ambient is 11 inches. If the cabin is 5 inches and the differential needs to be 3 inches then you need an upper deck of 19 inches or you lose cabin. And if the leak rate increases with cabin pressure maybe the 3 inches needs to be more.
Sound about right? Paul Legacy
I was looking through the TSIO-550 Power Settings Chart and noticed that it said the min MP for pressurization was 31.5".... I'm just wondering if this is true for all IVPs?
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