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912 ULS - % Power Curve

by James Stricker in 912 / 914 Technical Questions 8 years ago

I'm trying to find a % power curve for 912 ULS with MAP Vs. RPM. Any help appreciated...

Re: 912 ULS - % Power Curve

by Glenn Martin » 8 years ago

Glenn Martin

3 281 798

Hi James,
I am not sure about the ULS as I have an IS Sport. However in the IS Sport user manual there is a graph of power vs Density altitude at 5 rpms (page 61).

You can calculate density altitude to MAP as a percentage of 100% MAP at ISO sea level and therefore get MAP or % MAP then use the power numbers and the family of curves to get any Rpm from 4300-5800. It does not matter to the engine if the "MAP" is created by a throttle restriction or a decrease in pressure due to altitude, the resultant air supplied to the engine and therefore power is the same.

This will generate what you want...assuming the ULS Manual has the same data graph as the IS Manual has.

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