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ACN values for civil aircraft have been published in ICAO's Aerodrome Design Manual and in FAA Circular 150/5335-5.The ACN-PCN method is not a design or evaluation method, but purely a classification system. 'La Cosa Nostra' is one option -- get in to view more @ The Web's largest and most authoritative acronyms and abbreviations resource. ACN is calculated with respect to the center of gravity position, which yields the critical loading on the critical gear. In exceptional cases, the forwardmost CG position may make the nose-landing gear loading more critical.The ACN is defined for only four subgrade categories (high, medium, low, and ultra low).The ACN is twice the derived single-wheel load expressed in thousands of kilograms, with single-wheel tire pressure standardized at 1.25 megapascals (= 181 psi). In 1981 ICAO promulgated the ACN-PCN method as the single universal system for determining the weight limitation of aircraft operating on airport pavements by a procedure of comparing an airport's PCN with an ACN. This helps to ensure that the runways etc. Military LCN abbreviation meaning defined here. ... Aerospace, Aviation, Aircraft. An aircraft having an ACN equal to or less than the PCN can operate without weight restrictions on a pavement. Load Classification Numbers Aviation, Technology, Aircraft. According to this worldwide ICAO standard, aircraft can safely operate on a pavement if their ACN is less than or equal to the pavement load bearing capacity or PCN.
This helps to ensure that the runways etc. The ACN-PCN method only deals with aircraft weighting in excess of 5,700 kg (12,566 lb) as the airports with pavement for smaller size aircraft need only report the maximum allowable mass and the maximum allowable tire pressure if applicable.Manufacturers are required to calculate ACNs for new aircraft as they come into service and publish the results in flight manuals. It is not uncommon for reference to be made to PCN's calculated by the ACN-PCN method. ACN is calculated with respect to the center of gravity position, which yields the critical loading on the critical gear. An aircraft having an ACN equal to or less than the PCN can operate without weight restrictions on a pavement.The ACN of an airplane is a function of not only its weight but also the design parameters of its landing gear such as the distances between the wheels of a multiple-wheel landing gear assembly.The ACN is a single unique number expressing the relative effect of an aircraft on a pavement for a specified subgrade strength specifying a particular pavement thickness. It consists of a number on a continuous scale, ranging from 0 on the lower end and with no upper limit, that is computed between two pavement types (rigid or flexible), and the subgrade support strength category. The number is obtained by making plate-bearing tests on the pavement. LED Light-emitting diode. If you're looking for the aviation term that LCN stands for, you've come to the right place. are not subjected to excessive wear and tear, thus prolonging their usable life and promoting safe aircraft operations. The method concentrates on classifying the relative damage of aircraft. 2) devised the ACN/PCN method as an effective, simple, and readily comprehensible means for reporting aircraft weight-bearing capacity of airfields. This is always reported as a whole number, rounded from the determined capacity. Extrapolation is not permissible. ACN values for civil aircraft have been published in ICAO's Aerodrome Design Manual and in FAA Circular 150/5335-5.The ACN-PCN method is not a design or evaluation method, but purely a classification system.

are not subjected to excessive wear and tear, thus prolonging their usable life and promoting safe aircraft operations. (This applies most of the airfields in the USA) The only reference I have decodes the following codes: The tables give ACN values for two weights, one at the maximum total weight authorized and the other at the operating weight when empty. In fact the ICAO documentation makes it very clear that it is not a design/evaluation method and that the PCN is simply the ACN of the most damaging aircraft that can use the pavement on a regular basis (regular being defined by the operator).As per October 2007, ICAO revised the alpha factor for four wheel undercarriages. Looking for the definition of LCN? The PCN is formally published in an Aeronautical Information Publication (AIP).The load exerted on a pavement by the landing gear of an airplane is denoted as its ACN, or airplane classification number. ICAO foresees that each pavement authority will define a PCN by whatever means is considered suitable to indicate the support level of a particular pavement such that all aircraft with a published ACN equal to or less than the reported PCN can use that pavement safely, without load bearing failure or undue damage to the structure.The rigid pavements have four subgrade categories:Using the ACN method, it is possible to express the effect of individual aircraft on different pavements by a single unique number, which varies according to pavement type and subgrade strength, without specifying a particular pavement thickness.The ICAO system for civil airport pavements involves comparison of an airport's pavement classification number (PCN) with an aircraft classification number (ACN).