Went flying today and while all ops were normal engine-wise and gear, flap etc., etc., I could not achieve any better IAS than 148 knots, instead of the normal 178 knots, anywhere between 500’ and 2000’, 25 degrees C OAT, 25’ 2500 RPM as usual.

The take-off power and runway acceleration were normal. The only observation different was after gear was selected up, the rate of acceleration slowed, all engine parameters were normal. Most odd.

Rechecked Gear, and the flaps were definitely up.

The considerable lack of speed was most odd.

Dom,

 

Ck for leak in pitot system or a bug nest in the pitot tube or perhaps the pitot tube speared a roo or some other creature after takeoff.  Did the landing gear or flap controls pinch the pitot tubing upon their retraction?  Were normal speeds seen in the landing configuration (unless you are still aloft)?

 

Did you check against GPS ground speeds?

 

Blockage (water, bugs, etc.) in the static side would also have shown your altitude off unless something is wrong in the connection to the ASI.