On October 12th, 2012, I decided to go flying.

10 knots winds gusting to 21 knots.OAT 36F.

I still had to fix the slight turn to the right problem and then I would take the little bird to the sky for a spin.

I unscrewed 1 turn on the left aileron; problem fixed !

Got on board for a test flight. A Cessna C-150 (instructor/student) was doing circuit work so I asked them how the winds were....TRES SPORT, I was told. 

Lined up the runway, went to full throttle…

Hi again,

After I started looking at RPMs from our planes, I wanted to see if we were using their propellers efficiently.

Now, the most efficient range for any given propeller is when the TIP of the propeller turns below 82% sound barrier - but the closer the better.

Between 88% to 92% time the sound barrier speed being the redline and over being noisy and inefficient.

Since I…