Preliminary Airworthiness Evaluation of the RC-12K

During this test program, ten flights were conducted for a total of 22.8 hours, of which 14.6 hours were productive. Tests were performed in the Guardrail/Common Sensor System mission configuration ballasted to an average gross weight of 16,000 lb and centers of gravity at fuselage station 188.1 (forward) and 195.1 (aft). Test results were evaluated against military specification MIL-F-8785C for handling qualities. Performance data presented in the operator's manual were confirmed, as was the Beech Aircraft Corporation provided drag polar. The RC-12K test aircraft had good takeoff, accelerate-stop, landing, and climb performance. AT 16,000 lb maximum gross weight, the standard day service ceiling is above the certified ceiling of 35,000 ft. The handling qualities of the RC-12K were satisfactory. Minimum control speeds dictated that the flaps down approach speed was 106 knots indicated airspeed regardless of weight. The heavy-duty main gear wheel and brake system contributed to good accelerate-stop and landing performance. Lack of adequate stall warning and the poor engine cowl securing device were identified as deficiencies. One shortcoming was identified. Keywords: Army reconnaissance aircraft handling; Takeoff/climbing; Aircraft landings; Aircraft engine cowlings; Wheels/braking; Flight testing.