I had an interesting thing happen to me on the flight today, actually I had a couple of interesting things happen. First I had my lowest sustained fuel flow yet in cruise. I climbed up to 15,500' to see how the new induction was going to work. I kept the throttle wide open which is theoretically the most efficient position and then I leaned to about 40 degrees lean of peak EGT. After about 30 minutes of flight I found that the fuel flow was pretty stable at about 6.1 GPH and airspeed was about 150 kTAS with 2400 RPM. Then I pulled the throttle back about a quarter of an inch and watched the fuel burn come down to 4.5 gph with a 145 KTAS and 2350 RPM. Holy cow that was getting me about 42 MPG!
The second interesting thing to happen was my GMC-305 autopilot controller decided to put on a Christmas show. It was blinking constantly during flight and nothing I did would make it stop. Even after a power cycle the lights came back on and went to blinking. I emailed Garmin and we will see what they say. Here is a short video of the process. https://youtu.be/EJFl4oVPUB8
|This was a picture I took at full throttle. 6.2 GPH and 148 KTAS. The fuel flow and air speed will drift up and down a little.
|Here is one of the many pictures I took after I pulled the throttle about a quarter of an inch. 145 ktas and 4.7 GPH
|Another picture of the same stats.
|I took this picture so I could remember what the throttle/mixture settings were.
|Oh yea my head wasn't in the cockpit all day.... This is mount Hood as we were headed south.
|A few pictures of crater lake as I circled it.