We are taught about normal operations and engine out emergency operations, but what about partial power operations? I have had a partial power emergency where my C150 had less power than required to remain aloft and I was 10 miles from an airport with dense forest or houses as the other choices. Mine was caused by a blocked fuel vent so the engine was not blowing itself apart and ready to depart the aircraft. Other examples could be fouled plugs (not likely to cause further damage), partially blocked intake, stuck throttle, one bad cylinder, etc. If that is the case, what speed is best to maximize the flying/glide range in order to have the best chance to make it to an airport. Let's assume that the airplane lost enough power that it is no longer able to maintain level flight at Vy speeds. Do you pitch for best glide speed in the POH? Remain at Vy speed? A higher speed since you have some power and it may get you somewhere faster in case the engine only has a certain number of minutes of running left?