Mastering Speed Management and Load Control in Sling Loading

Table of Contents

1. Introduction
2. Definitions and Phrases
3. The Root Phase
   • 3.1 Picking up the Load
   • 3.2 Approach and Delivery
4. The Inward Phase
   • 4.1 Mapping the Route
   • 4.2 Speed Management
   • 4.3 Determining Safe Airspeed
   • 4.4 Flyability of Different Load Types
   • 4.5 Reaching the VNE of the Load
5. Transitioning to and from the In-Root Face
6. Managing the Load
7. Rules for Safe Sling Loading Operations
8. Conclusion

Sling Loading Tutorial: Mastering the Inward Phase

Sling loading is a complex operation that requires careful planning and execution. In this tutorial, we will dive deep into the inward phase of sling loading, specifically focusing on the transition to and from the end root face, managing the load, and crucial safety considerations.

1. Introduction

Sling loading involves the transportation of heavy loads using helicopters, relying on a sling attached to the aircraft. The inward phase is a critical stage during sling loading operations, encompassing the time after the load has been picked up and before the approach and delivery of the load.

2. Definitions and Phrases

Before delving into the intricacies of the inward phase, it's important to understand some key definitions and phrases used in sling loading. Refer to the links in the description for comprehensive explanations of these terms.

3. The Root Phase

The root phase refers to the period between picking up the load and approaching the delivery area. It is during this phase that the transition to and from the end root face takes place. Efficiently managing the load and ensuring its safety are paramount.

3.1 Picking up the Load

When starting each sling loading mission, it is crucial to map out the route to be flown. This pre-planning ensures a safe and efficient journey. Additionally, safety protocols must be in place to prevent any harm to individuals or property on the ground in the event of load release or loss.

3.2 Approach and Delivery

During the root phase, the pilot needs to determine the appropriate speed and altitude for the approach. A safe and controlled descent, with necessary provisions for aborting the approach if needed, is essential. The speed should be manageable and allow for a comfortable approach and delivery.

4. The Inward Phase

The inward phase of sling loading operations focuses primarily on speed management. It is essential to adhere to the flight manual's prescribed airspeed limits for underslung loads. However, it is equally important to consider the specific characteristics of each load to determine the optimal flying speed.

4.1 Mapping the Route

Before initiating the inward phase, a well-defined route must be prepared. This involves considering factors such as obstacles, airspace restrictions, and the safety of ground personnel. Thoroughly mapping the route ensures a seamless and successful inward phase.

4.2 Speed Management

The flight manual provides guidelines regarding the permissible airspeed for sling loading operations. For instance, the maximum airspeed for the H125 is 80 knots. However, it is crucial to understand that the load's behavior at different speeds should be monitored to ensure stability.

4.3 Determining Safe Airspeed

To determine the safe flying speed for a particular load, it is recommended to gradually increase the airspeed while observing the load's response. By incrementally increasing the speed and monitoring the load's stability, the pilot can ascertain the ideal airspeed for that specific load.

4.4 Flyability of Different Load Types

Various factors influence the flyability of different load types. Light and bulky loads tend to generate significant drag, requiring slower flying speeds. On the other hand, compact and dense loads, such as concrete buckets, can generally be flown at the maximum airspeed specified in the flight manual.

4.5 Reaching the VNE of the Load

The VNE (Velocity, Never Exceed) of the load refers to the airspeed at which the load begins to oscillate or spin uncontrollably. Each load type may have a unique VNE, and it is crucial to identify this limit through incremental speed testing. Staying below the VNE ensures a safe and stable inward phase.

5. Transitioning to and from the In-Root Face

Smooth transitions during sling loading operations are critical for the overall success of the mission. When slowing down towards the end of the in-root phase to transition into the approach, it is imperative to maintain a certain speed and altitude. These parameters provide a reference point and allow for easy adjustments during the approach.

6. Managing the Load

Proper load management is essential throughout the inward phase. Care must be taken to prevent excessive oscillations or spinning of the load. If the load reaches or exceeds its VNE, actions must be taken to stabilize it before continuing the mission. Techniques such as slowly lowering the load or gently touching it down can be employed to mitigate any potential hazards.

7. Rules for Safe Sling Loading Operations

To ensure the safety of personnel and property, it is crucial to follow a set of rules during sling loading operations:

• Never overfly individuals or objects that may be harmed in the event of load release or loss.
• Incrementally accelerate the airspeed for each type of load, observing its behavior at different speeds.
• Maintain a set point in space during the in-root face to facilitate a smooth approach on subsequent logs.

8. Conclusion

Mastering the inward phase of sling loading is essential for safe and successful operations. By understanding the dynamics of speed management, load behavior, and adherence to safety protocols, pilots can confidently navigate this phase. Remember to approach each load with caution, thoroughly analyze its flyability, and prioritize safety at all times.

Highlights

• The inward phase of sling loading is a critical stage that requires careful speed management and load control.
• Gradually increasing the airspeed while monitoring load behavior helps determine the safe flying speed for each type of load.
• Adhering to safety rules, such as avoiding overflying people and property, ensures the well-being of all parties involved.
• Smooth transitions and proper load management are key elements of a successful sling loading operation.

FAQ

Q: What is the VNE of a load? A: The VNE (Velocity, Never Exceed) of a load refers to the airspeed at which the load starts oscillating or spinning uncontrollably.

Q: How do I determine the safe flying speed for a load? A: Incrementally increase the airspeed while monitoring the load's behavior. Find the speed at which the load remains stable and follow that as the safe flying speed.

Q: What are the rules for safe sling loading operations? A: Some crucial rules include never overflying people or objects that may be harmed, incrementally accelerating the airspeed for each load type, and maintaining a set point in space during the in-root face for better approach adjustments.