What makes 2350 rpm better or worse than, say, 2561.3 rpm? This article describes a few tests I conducted to help me choose the best rpm in my RV-8. Now that you have a constant-speed propeller, an obvious question arises: What is the best rpm to choose? This is not an easy question to answer because it depends on your definition of “best.” Also complicating the matter is the fact that there are literally an infinite number of rpm to choose from. This article assumes you have already installed a constant-speed propeller. Plenty of good articles have already covered this ground, so we won’t go there now. The arguments for constant-speed propellers are usually focused on better performance across a wide range of aircraft and engine speeds. The arguments for fixed-pitch propellers usually revolve around simplicity, lower weight, and cost. The number of choices increases when you consider construction material and blade number variations as well.
Various types such as fixed-pitch, ground-adjustable, and constant-speed propellers are readily available from several manufacturers. As amateur builders we are fortunate to have a plethora of propellers to choose from.
