Friday, one of my partners and I changed the oil. Afterwards, we took it up
for a spin to reward ourselves. As I rotated, I glanced down at the tach
and was rather horrified. Redline on the Archer is 2,700 RPM. We were
turning 3,300! 600 RPM over redline. Huh?! Since we still had the full
length of both prop blades, the only logical explanations are either that
someone put a different prop on in the dead of night, or that someone
sneaked up and hopped up the Lycoming. We have to be getting 240 hp to see
that much overreving on climbout. Wow. Thanks, phantom tuner. What a nice
guy...

Oh crap! The rate of climb isn't any different.

We've ordered a new tach.

--
Bob (Chief Pilot, White Knuckle Airways)