I wonder if you could use an E-APC prop on a Gasser to slow the RPMs down and get better performance because of the effiency of the prop.
Chuck.
I don't think the E-props are any more efficient for a given diameter/pitch, but they are significantly lighter. (Electric props are more efficient because they generally are bigger) Less material is used on the E-props, because less strength is required. With a IC engine, you get a hammer knock every revolution (2C) or every second revolution (4C), while with the electric motor you get an (almost) even torque.
I would not stand anywhere near an IC engine with an E-prop!!!
Magne