Iíll give it a go:
- The prop governor, if properly set for our type of props, will not be porting oil to the prop hub at high RPM (fine pitch). Fine pitch is set via the prop hub stop. In other words, if you lost all oil pressure the prop will go to fine pitch stop (high RPM).
- So assuming the prop hub is set up right, on takeoff roll the prop will be at fine pitch limit as set by the hub (2700 RPM) but will start to try to increase RPM as you gain airspeed. The governor will port oil to the hub at that point to have the prop take a bigger bite, thus holding RPM at 2700. This is a governor adjustment that should be set right about right as it comes out of the box.
- I can see how a prop governor not set up right could port oil to limit RPM to 2400, so worth checking. That is a simple screw sitting so easier than messing with the hub as the first step.
Of interest, Alex and Paulo Tonini just finished installing new custom blades for an RV-14A (first set of blades where a touch small). These are the blades they had on display at Oshkosh.