Flight #30 was to determine cruise fuel flow at ~6000' DA, 2600rpm. Climbed to 3500'-4500PA (5600-6655DA) and cruised for 3h19m before decending to Chatham (CQX) to refuel. Covered 290nm flying lines between EWB and CQX. TAC time 3:46. Cruise fuel flow ~3.1gph