**Introduction:**

Aircraft classification number (ACN) is a vital parameter used to assess the strength of a pavement for the purpose of designing and maintaining airfields. It is a numerical value that determines the load-carrying capacity of the pavement under a particular aircraft wheel load configuration. The calculation of ACN involves several factors, including aircraft weight, tire pressure, and wheel spacing. In this article, we will delve into the details of aircraft classification number calculation and its significance in airfield pavement design.

## Factors Affecting ACN Calculation

**Several factors play a crucial role in determining the ACN of an aircraft. Some of these factors include:**

Aircraft Weight: The weight of an aircraft is a primary factor in determining the ACN. The heavier the aircraft, the higher the ACN.

Tire Pressure: Tire pressure is another significant factor that affects the ACN calculation. Higher tire pressures lead to higher ACNs.

Wheel Spacing: The spacing between the wheels of an aircraft also affects the ACN calculation. The closer the wheels, the higher the ACN.

Type of Pavement: The type of pavement also plays a significant role in ACN calculation. The ACN will be different for a concrete pavement compared to an asphalt pavement.

### ACN Calculation Process

**The process of calculating the ACN involves several steps, as outlined below:**

Determine the aircraft weight, which includes the maximum takeoff weight, the weight of fuel, and the weight of payload.

Calculate the tire pressure for the aircraft. The tire pressure is typically provided by the aircraft manufacturer.

Determine the wheel spacing for the aircraft. The wheel spacing is also typically provided by the aircraft manufacturer.

Using the aircraft weight, tire pressure, and wheel spacing, determine the aircraft classification number using an appropriate formula.

The formula for ACN calculation varies depending on the type of pavement. For example, the formula for ACN calculation on a concrete pavement is different from the formula for ACN calculation on an asphalt pavement.

### Significance of ACN in Airfield Pavement Design

The ACN is an essential parameter in airfield pavement design. It is used to determine the strength of the pavement required to support the weight of an aircraft. Airfield pavement design must ensure that the pavement can withstand the expected aircraft loads without sustaining any damage or experiencing any structural failure.

The ACN is also used to determine the appropriate runway length required for takeoff and landing. The longer the runway, the higher the ACN that can be accommodated.

The ACN also plays a crucial role in determining the type of pavement required for a particular airfield. Airports with a high volume of heavy aircraft traffic require a higher ACN pavement to withstand the expected loads.

### What is PCN numerical value?

The Pavement Classification Number (PCN) is a numerical value that determines the load-carrying capacity of an airfield pavement. It is a rating system used to classify pavements based on their strength and durability under the expected aircraft loads. The PCN numerical value is calculated based on the strength of the pavement, including factors such as the thickness of the pavement layers, the quality of the materials used, and the condition of the subgrade soil.

### What is ACN and PCN in aviation?

ACN stands for Aircraft Classification Number, while PCN stands for Pavement Classification Number. Both ACN and PCN are used in aviation to determine the load-carrying capacity of airfield pavements. ACN is a numerical value that represents the load-carrying capacity of an aircraft, while PCN is a numerical value that represents the load-carrying capacity of a pavement. ACN is used to determine the strength of the pavement required to support the weight of an aircraft, while PCN is used to rate the strength of the pavement itself.

### What is the difference between PCN and ACN?

The main difference between PCN and ACN is that PCN is a rating system used to classify pavements based on their strength and durability, while ACN is a numerical value that represents the load-carrying capacity of an aircraft. ACN is used to determine the strength of the pavement required to support the weight of an aircraft, while PCN is used to rate the strength of the pavement itself. In other words, ACN is a measure of the load, while PCN is a measure of the pavement’s ability to withstand that load.

### What is load classification number aircraft?

Load Classification Number (LCN) for an aircraft is a numerical value used to determine the maximum allowable load-carrying capacity of a pavement. The LCN is calculated based on the aircraft’s weight, tire pressure, and wheel spacing. It is used to determine the type of pavement required for a particular airfield to ensure that the pavement can withstand the expected loads without sustaining any damage or experiencing any structural failure.

Aircraft classification number list An Aircraft Classification Number (ACN) list is a database of ACN values for different types of aircraft. It provides information on the load-carrying capacity of different aircraft and is used in airfield pavement design to determine the appropriate strength of the pavement required to support the expected loads. ACN lists are typically maintained by airport authorities and are regularly updated to include new aircraft types.

acn/pcn calculator online An ACN/PCN calculator is an online tool used to calculate the ACN or PCN value for a specific aircraft and pavement combination. These calculators take into account various factors such as aircraft weight, tire pressure, wheel spacing, and pavement thickness to determine the appropriate ACN or PCN value.

Aircraft classification number calculator An Aircraft Classification Number (ACN) calculator is a tool used to determine the ACN value for a specific aircraft based on its weight, tire pressure, and wheel spacing. This value is then used to determine the strength of the pavement required to support the aircraft’s weight.

Aircraft classification number boeing 737 The Aircraft Classification Number (ACN) for a Boeing 737 varies depending on the model and configuration of the aircraft. ACN values for the Boeing 737 can be found in ACN lists maintained by airport authorities.

Pavement classification number The Pavement Classification Number (PCN) is a numerical value used to rate the load-carrying capacity of an airfield pavement. The PCN is calculated based on the strength of the pavement, including factors such as the thickness

### What is Aircraft Classification Number (ACN)?

The Aircraft Classification Number (ACN) is a numerical value used to represent the load-carrying capacity of an aircraft. It is used in airfield pavement design to determine the strength of the pavement required to support the weight of an aircraft.

### What is Pavement Classification Number (PCN)?

The Pavement Classification Number (PCN) is a numerical value used to rate the load-carrying capacity of an airfield pavement. It is used to classify pavements based on their strength and durability under the expected aircraft loads.

### What is the difference between ACN and PCN?

The main difference between ACN and PCN is that ACN is a measure of the load, while PCN is a measure of the pavement’s ability to withstand that load. ACN is used to determine the strength of the pavement required to support the weight of an aircraft, while PCN is used to rate the strength of the pavement itself.

### How is ACN calculated?

ACN is calculated based on the weight, tire pressure, and wheel spacing of the aircraft. These values are inputted into an ACN calculator, which provides the ACN value for the aircraft.

### How is PCN calculated?

PCN is calculated based on the strength of the pavement, including factors such as the thickness of the pavement layers, the quality of the materials used, and the condition of the subgrade soil. PCN values are determined through laboratory testing and analysis of pavement samples.

### What is Load Classification Number (LCN)?

Load Classification Number (LCN) for an aircraft is a numerical value used to determine the maximum allowable load-carrying capacity of a pavement. The LCN is calculated based on the aircraft’s weight, tire pressure, and wheel spacing.

### What is an ACN/PCN calculator?

An ACN/PCN calculator is an online tool used to calculate the ACN or PCN value for a specific aircraft and pavement combination. These calculators take into account various factors such as aircraft weight, tire pressure, wheel spacing, and pavement thickness to determine the appropriate ACN or PCN value.

### What is an ACN list?

An ACN list is a database of ACN values for different types of aircraft. It provides information on the load-carrying capacity of different aircraft and is used in airfield pavement design to determine the appropriate strength of the pavement required to support the expected loads.

### Why is ACN/PCN calculation important?

ACN/PCN calculation is important for ensuring the safety of aircraft operations on airfield pavements. It ensures that the pavement can withstand the expected loads without sustaining any damage or experiencing any structural failure. Additionally, proper ACN/PCN calculation can prevent costly pavement repairs and replacement.

## Conclusion:

In conclusion, the aircraft classification number is a critical parameter in airfield pavement design. The calculation of ACN involves several factors, including aircraft weight, tire pressure, and wheel spacing. The ACN is used to determine the strength of the pavement required to support the weight of an aircraft and the appropriate runway length required for takeoff and landing. It is also used to determine the type of pavement required for a particular airfield. ACN is, therefore, an essential consideration in airfield pavement design to ensure the safety and efficiency of air travel.