Why still no dive acceleration difference?

[BlackBerry]

Originally Posted by AndyJWest

You are asking TD to rewrite the entire flight physics modelling based on a single number? Yeah, that's going to happen...

I don't know whether detailed propeller efficiency is calculated in il2 FM. Someone told me it's only a simple value. It's ridiculous that a propeller a/c simulation game dosn't provide accurate efficiency curve. Simply setting 85% for all of CSP ? No, that's totally unacceptable.

People will spend quite a lot time to collect different propeller data such as prop diameter, reduction ratio, airfoil section shape, angle, etc. Next step is to use Xfoil/Ansys(software) to calculate complete efficiency curve for every propeller. It's worthy because <<cliff of Dover>> could also benefit from this work. Don't forget 10% efficiency difference will cause 100-200 HP error.

like this:
a.JPG

BTW, efficiency drops as altitude increases. If a CSP get 85% at sea level, there is only 85%*80%=68% at 6000m altitude(800KM/H TAS).
b.JPG