Also posted over in the FG-60R3 forum - first flight session with the engine...
https://www.youtube.com/watch?v=x_MYY0NlbQY
Prop is an APC 22x10 with a top end of 6,800. Mix was 1:20, using Castrol Synthetic. The engine tuned easily (6.5 turns out on the low and ~2.5 turns out on the High) and Ran like clockwork.
The on-board telemetry sensors for temps (1 per cylinder) showed only a deviation of <2degrees C on the ground (idle) and in flight for (mid-range)..! Seems like the careful running-in (see previous posts) paid dividents.. Temp range was between 80-90C on the ground.
Note: readings are taken between the fins just below the spark plug, on the rear side (to avoid speed/cooling effect of oncoming airflow). In reality, CHTs will be 30-40C higher on near the top of the combustion chamber.
A +20C difference between Nos 2&3 and No.1 (top cylinder) was recorder after prolonged mid/high throttle settings in the air. This was expected due to the relief airflow arrangement in the cowl (louvres only on the bottom side for scale reasons suck more cooling air around the bottom cylinders...).
A Happy customer!