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TM 1-1520-240-10 6-6-18 6-6-35. Cargo Weight. Package weight of individual items of cargo should be legibly stenciled on an exterior surface. If not provided, the weight must be determined in order to plan cargo placement, to calculate contact pressure, and too compute helicopter weight and balance. The same rule applies to palletized cargo and vehicle loads. 6-6-36. Cargo Center of Gravity. The center of gravity (C.G.) of each item of cargo must be determined in order to compute weight and balance by the station method. As a rule, those items of cargo crated for transport will be marked with a C.G. If the C. G. is not marked, it can be determined by methods provided in TM 10-450-10. 6-6-37. Vehicle Load. The same general rules that are observed in cargo loading apply to vehicle loading. In addition, the fuel tank caps, radiator caps and battery filler caps should be checked and secured. Fuel tanks should be checked to see that they are not filled above three-quarters capacity. Air trapped in a fuel tank will expand at altitude and force fuel out through the filler neck, creating a fire hazard. If fuel tanks are filled to capacity, some fuel must be drained off before the vehicle is loaded. Also, check tire pressures and if necessary, deflate tires to prescribed limits. 6-6-38. Hazardous Cargo. Items of cargo possessing dangerous physical properties, such as explosives, acids, flammables. etc., must be handled with extreme caution and in accordance with established regulations and TM 38-250. 6-6-39. General Instructions for Loading, Securing, and Unloading Cargo. There are three prime factors to be considered in properly loading the helicopter. These factors are weight, balance, and restraint. The weight of the cargo to be loaded must remain within safe operating limits, and the cargo must be restrained from shifting during takeoff, flight, and landing. Refer to TM 10-450-10 to determine or compute loading, shoring and restraint criteria. 6-6-40. Weight and Balance. Refer to TM 55-1500-342-23 and figure 6-7-1 to compute helicopter GW/CG and complete Form F. 6-6-41. Restraint. Items of cargo within the helicopter are subject to the same forces which affect the helicopter in flight. These forces will cause the cargo to shift unless the cargo is restrained. To maintain helicopter balance and prevent injury to personnel, cargo must be restrained from shifting. TM 1-1520-240-10 6-6-19 Figure 6-6-10. Stowage Locations TM 1-1520-240-10 6-6-20 Figure 6-6-11. Cargo Door Cranking 6-6-42. Load Planning. Before loading cargo, the placement of individual items of cargo in the helicopter should be planned and then checked to determine if the planned arrangement falls within the C.G. limits. there are three basic steps involved in load planning. The first step is to decide which method will be used to compute C.G. of the load. If the compartment method is to be used, each item of cargo must be assigned a location in one of the three compartments. If the station method is to be used, specific station locations must be assigned to each item of cargo. The second step is to compute the C.G. of the load. If the load consists of a number of items of cargo, the compartment method should be used. If the load consists of only a few bulky items, the station method should be used. The third step is to check if the C.G. falls within the allowable limits. If it does, the cargo can be loaded; if not, the location of individual items should be rearranged until an acceptable loading plan is obtained. 6-6-43. Compartment Loading. Loading by compartments provides a rapid means of computing the C.G. of a load and can be used whenever the cargo load consists of a number of items. The helicopter cargo compartment is divided into three compartments (fig. 6-6-12). The centroid, or center of balance, of each compartment is located at station 181, 303, and 425, respectively. When using the compartment method, it is assumed that the weight of all the cargo in the compartment is concentrated at the centroid of the compartment. If an item of cargo extends into two or three compartments, the weight of the item should be proportionately distributed in each compartment. The C.G. of the cargo load is computed as follows: a. Record the weight of cargo in each compartment. b. Calculate the compartment moment by multiplying the total weight in each compartment by the station number of the compartment centroid. c. Add the compartment moments. www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：支奴干运输直升机操作手册2
