时间:2011-04-05 11:32来源:蓝天飞行翻译 作者:航空 点击:次
To view this page ensure that Adobe Flash Player version 9.0.124 or greater is installed. ITEM POUNDS Basic empty weight 1,040 Pilot 135 Subtotal 1,175 (point D) Baggage compartment load 25 Subtotal 1,200 (point E) Fuel load 160 Total weight 1,360 (point F) Follow the blue arrows in figure 7-6, starting at 1,175 lb. on the left side of the graph, then to point D, E, and F. Although the total weight of the helicopter is well below the maximum allowable gross weight, point F falls outside the aft allowable CG limit. As you can see, it is important to reevaluate the balance in a helicopter whenever you change the loading. Unlike most airplanes, where discharging a passenger is unlikely to adversely affect the CG, off-loading a passenger from a helicopter could make the aircraft unsafe to fly. Another difference between helicopter and airplane loading is that most small airplanes carry fuel in the wings very near the center of gravity. Burning off fuel has little effect on the loaded CG. However, helicopter fuel tanks are often significantly behind the center of gravity. Consuming fuel from a tank aft of the rotor mast causes the loaded helicopter CG to move forward. As standard practice, you should compute the weight and balance with zero fuel to verify that your helicopter remains within the acceptable limits as fuel is used. SAMPLE PROBLEM 3 36 @STA. 83.2.” Go left and read the pilot/passenger moment (28.3 thousand lb.-inches). MOMENT (THOUSANDS OF LBS. IN.) |