MT Propeller overspeed on static

27 Sep 2005 MT Propeller overspeed on static

Q:
> When I run my 2.5L single cam with MT prop static with the rpm
> selector at 2700 rpm, the EIS indicates exactly 2700 rpm at full
> throttle. However, when I did my high speed taxi test with the
> selector at 2700 rpm I get an overspeed warning with the rpm reading
> 2800 rpm. This happens just at rotation speed and a big red light
> flashing at that speed is kind of disconcerting

A:

Remove the spinner and adjust the electric stops on the jack screw such that you can only get 2500 RPM static. This will give the system time to catch up to the airplane and RPM accelerating.