rds For details on the shafts see Chapter C B3-SV14A Bevel-helical gearboxes B3

Flender/Flender Gear Units/Bevel-helical gearboxes B3

often shaped likeigloos. Like aircraft pallets, containers are of lightweight construction and therefore must be supported from below. They must not be stacked nor moved with forklifts. Aircraft containers are mainly transferred on roller systems and are generally made of aluminumalloy. 5.5.2.3 Intermodal Containers For door-to-door, superfast transport, intermodal 2- and 4-ft refrigerated containers may also be used (Peleg, . Their heavier structure adds considerable weight to the payload of an aircraft. However, they have the advantage of reducing the number of times theindividual produce shipping containers need to be handled and ensure that the load is heldunder refrigerated conditions before and after the ight. The refrigeration unit on thecontainers must not be operated in ight, since the heat generated by the units condenser cannot be easily disposed of in the pressurized cargo compartment. During relatively shortying times, the container insulation and the heat capacity of the produce usually prevent noticeable produce temperature rise (Peleg, . Regular nonrefrigerated intermodal containers can be used if the transport logistics are well organized, that is, if the truckingand airplane loading times can be precisely coordinated (Peleg, . Boeing 7F freighter aircraft can carry 5 4-ft containers (2 mm /H1,1 mm) and 1 1-ft containers (2 mm /H1 mm), or 1 2-ft containers (2 mm /H1 Transportation and Handling 5 6 mm) and 4 1-ft containers (2 mm /H1 mm), or 2 aircraft pallets (2 mm/H1 mm) on its main deck. 5.5.3 Temperature Control on AircraftAircraft cargo holds are pressurized similarly to passenger cabins. At high altitudes, out- side air temperatures can be as low as /H1C. Once compressed to cabin pressure, the inside cargo air ranges in temperature from 0 Ct o1 0C. The air is then used to remove heat from the electronic instrument bay. Further heat can be supplied by the aircraftsheating system so that the temperature in the cargo hold is generally held