Climb performance
Today I experienced a performance issue with my 912ULS (Pipistrel Virus SW), at least I think I did. Took off from my home field, elev 180', QNH 1020, Temp 14C. Takeoff performance was normal, 5750RPM, Ts and Ps in the green, normal acceleration and takeoff distance (3kt headwind). Started the climb out and noticed that the aircraft wasn't accelerating past 80kts on the normal 90kt climb attitude. I reduced the climb angle, and at 80kts I was only getting 200fpm climb when I'd normally be getting close to 1000fpm. I elected to stay in the circuit and even with 5500rpm (19MAP) I was only getting 90kts on downwind. All engine monitoring indications were in the green. I flew a normal circuit but remained high for most of finals as I was unsure of what to expect. Completed a normal flaps +1 landing. Taxied off and conducted engine runs. Normal in dictations for everything. I called it a day and am now scratching my head about what could be the cause. The prop remained in full fine throughout except during the run up check when it cycled normally. I repeated the run up procedure before shutting down. Thoughts?
