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463L master pallet

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463L master pallet

The HCU-6/E or 463L Master Pallet is a standardized pallet used for transporting military air cargo. It is the main air-cargo pallet of the United States Air Force, designed to be loaded and offloaded on today's military airlifters as well as many civilian Civil Reserve Air Fleet (CRAF) cargo aircraft.

Description

463L system pallet being extracted by a pilot chute from a C-130 Hercules during an airdrop

The "SS-463L" project was developed by a U.S. Air Force committee in 1957 and awarded to the Douglas Aircraft Company in 1959. The "SS-463L Pallet Cargo Handling System" specifications for aircraft (aka "463L") included a "Master Pallet" design to meet a component of the materiel handling specifications of this system. The "Master Pallet" was contracted to the AAR Cadillac Manufacturing Corporation, at one time AAR Cadillac Corp, and now AAR Corporation.

In the 1950s, the U.S. Air Force used a standard designation system for all awarded projects. The "SS" represents (Support System), the "463" represents an assigned general system category, 400–499 series for "Support Systems", and the suffix "L" also represents "Support Systems". Thus, "463L" is the name of the system.

The standard HCU-6/E pallet in the "463L" system was designed and finalized in the early 1960s by the AAR Cadillac Corp. to implement the "SS-463L Pallet Cargo Handling System" now known as "Materials Handling Support System "463L"". The original design of the HCU-6/E pallet met the standards of the Universal Cargo Handling Rail System design in 1962 for the C-130 and C-141 transport aircraft. The new sturdy HCU-6/E pallet was a drastic improvement to the older lightweight balsa wood pallets used by the Air Force in previous years. It has often been thought that the 463L stands for the year that the pallet was initiated April 1963. Each HCU-6/E pallet is 88 inches (224 cm) wide, 108 inches (274 cm) long, and 2-1/4 inches (5.7 cm) high. The usable space is 84 in (213 cm) by 104 in (264 cm). It can hold up to 10,000 lb (4,500 kg) of cargo (not exceeding 250 lb per square inch) at 8 g. Empty, each pallet weighs 290 lb (130 kg), or 355 lb (160 kg) with two side nets and a top net.

Based on the HCU-6/E air cargo Master Pallet, additional components include the HCU-7/E side net, the HCU-15/C top net, and the CGU-1/B Device or cargo strap. MB-1 Devices or MB-2 Devices may be used with appropriate chains.

The "463L Master Pallets" can be unloaded on the ground in peacetime or in combat, or airdropped with a parachute.

They are built of a balsa wood core and surrounded by a thin aluminum skin. There are 22 tie-down rings surrounding the edge, each rated at 7,500 lb (3,400 kg).

Gallery


References

  • Animation that shows 463L master pallets being loaded into a military aircraft.
  • Projects on designation-systems.net
  • Master Jumpmaster Update, April 2003, US Army, Fort Bragg at the Wayback Machine (archived March 15, 2007)
  • Journal article by Kenneth P. Werrell; Air Power History, Vol. 50, 2003
  • L3ABR2T231-004-II Air Transportation Apprentice Course Study Guide, May 2000, US Air Force, 345TRS, Lackland AFB, Texas
  • 463L-pallet Global Security article
  • Online information for Defence Community
  • United States Patent Application

See also

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