Tire Loading
08-31-2017 | 11:00 AM
#1
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From: 747 Captain (Ret,)
Tire Loading
A question came up that I don't know how to find data on.
What aircraft had the highest tire loading? Also what aircraft had the highest PSI tire loading on its footprint, excluding fighters, which had ridiculously high loadings.
Joe
What aircraft had the highest tire loading? Also what aircraft had the highest PSI tire loading on its footprint, excluding fighters, which had ridiculously high loadings.
Joe
08-31-2017 | 04:15 PM
#2
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From: Baja Vermont
You could look it up here:
https://www.scribd.com/mobile/docume...cation-Numbers
The Sabreliner was right up there at 265 psi on the mains.
GF
https://www.scribd.com/mobile/docume...cation-Numbers
The Sabreliner was right up there at 265 psi on the mains.
GF
08-31-2017 | 06:54 PM
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From: 777 Captain in Training
09-01-2017 | 03:34 PM
#7
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From: 747 Captain (Ret,)
I'm looking for two numbers.
First is highest weight borne by any one wheel of a max gross weight airplane.
The second is the highest PSI exerted by an aircraft tire on an airport surface by a properly inflated tire of a max gross weight aircraft.
I am not concerned with the actual inflation PSI of the tire, except that it conforms to the manufacturers specification.
Joe
First is highest weight borne by any one wheel of a max gross weight airplane.
The second is the highest PSI exerted by an aircraft tire on an airport surface by a properly inflated tire of a max gross weight aircraft.
I am not concerned with the actual inflation PSI of the tire, except that it conforms to the manufacturers specification.
Joe
09-01-2017 | 04:27 PM
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From: Baja Vermont
Because you have to consider the interaction of the pavement type, subgrade, and tire pressure, it's not as simple as you make it. Look at the chart I posted and search for highest ACN.
Here's a good intro
http://code7700.com/acn_v_pcn.htm
This from wiki
GF
Here's a good intro
http://code7700.com/acn_v_pcn.htm
This from wiki
The aircraft classification number (ACN) is a number expressing the relative effect of an aircraft on the runway pavement for a specified standard subgrade category, using a method defined by the International Civil Aviation Organization (ICAO).
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. ACN values for civil aircraft have been published in ICAO’s Aerodrome Design Manual and in FAA Circular 150/5335-5.
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 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). Additionally, the derived single-wheel load is a function of the sub-grade strength.
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 pavement’s strength is denoted by its pavement classification number (PCN).
The load exerted on a pavement by the landing gear of an airplane is denoted as its ACN, or airplane classification number. The ACN is not permitted to exceed the PCN of the runway to be used, in order to prolong pavement life and prevent possible pavement damage.
The ACN is defined for only four subgrade categories (high, medium, low, and ultra low).
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. ACN values for civil aircraft have been published in ICAO’s Aerodrome Design Manual and in FAA Circular 150/5335-5.
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 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). Additionally, the derived single-wheel load is a function of the sub-grade strength.
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 pavement’s strength is denoted by its pavement classification number (PCN).
The load exerted on a pavement by the landing gear of an airplane is denoted as its ACN, or airplane classification number. The ACN is not permitted to exceed the PCN of the runway to be used, in order to prolong pavement life and prevent possible pavement damage.
The ACN is defined for only four subgrade categories (high, medium, low, and ultra low).
GF
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