FAIL (the browser should render some flash content, not this).

10K Hook
10K Hook (Cage, Side Plates
and Load Beam)
Safety Considerations

The design of a complete external load system requires that each component of the system be equally capable to lift, carry and deliver the load safely. The system must be able to deliver the load and allow for efficient and effective use of the airframe to ensure that the mission can be accomplished. The types of loads vary in style and consistency. We have designed our systems to be efficient, effective and
Hook Test
25K Hook 100,0001b
Static Test for NASA

whether you are transporting live cargo, Hazardous Material, dunnage, fuel, supplies, or any other type of a sling load. We have taken all of these factors into account in the design of our hook.

Safety Factor 5 X:

The Hook comes in two sizes. They are 10K or 10,000 lb. Working Load Limit and 25K or 25,000 lb. Working Load Limit. These are the limits that we have determined are the suggested weight limits to be used with the respective hooks. We proof test the Hooks to 50,000 lbs for the 10K Hook and 125,000 lbs for the 25K Hook. This maintains a 5X safety factor for our systems. We test our Hooks and Swivel as a system so that we know that the package will withstand the 5X safety factor. Our Hooks are designed to withstand occasional overloads and to withstand additional shocks to the load while in the air. This safety factor ensures that if the load inadvertently comes into contact with an object while in flight, the integrity of the hook and the swivel will be maintained and the service life will not be reduced.

Shock Absorption:

Load Beam Bumper
Our research has shown that when a load is released in flight, the hook, if not correctly designed, will impart a shock into itself and into the system that is attached. This shock will eventually affect the airframe that is transporting the load. We have designed our Hook with a larger bumper than is usually found to absorb all of the Kinetic energy that is being transferred by the Load Beam into the Hook Body and the Long Line System. By using the size bumper that we do, we have determined that we can maintain the Hook integrity and its longevity. In addition, when on the ground if the load is released manually, while still suspended, this will prevent the shock from being transmitted into the ground crew persons hand and arm.

Load Beam:

The Load Beam is designed to provide the least amount of resistance to the release of the load. To assure that this is accomplished, we have designed our load beam with a smooth transition from the back of the Load Beam to the front tip of the Load Beam. This smooth transition allows the strap, shackle, and etc, to slip off the Load Beam without any danger of catching on a crease. In addition, our Load Beam, when opened, moves past 90┬░. This additional opening guarantees that the strap, shackle, round sling, and etc. has no means to stay on the Load Beam surface. The Load Beam opening exceeds US Army and STANAG requirements for ease of loading.

Lock Out System:

Our Hook is designed with a Proprietary Manual Lock-Out System. This manual system allows the ground crewman to Lock Out the release mechanism both electric remote and the manual release. When engaged, the Hook cannot be released either with the solenoid being operated or with the manual release on the Hook. This allows the operator to make lifts with no possibility of an inadvertent release when using the Hook with live cargo or Hazardous Material. The Lock Out is done via a physical detent and has been designed to prevent the possibility of movement while in flight or if tangled in a limb or obstacle during lift or delivery. The Lock Out is located on the body of the Hook itself and is inside the cage which further protects it from interference.


In designing our Hooks, we have used only high grade fasteners (Grade 8 or above) and Aircraft Nylok nuts. These Hooks are designed for the most rugged of conditions both in temperature and atmosphere and have 1000's of hours of maintenance free operation.


Because of FAA Regulations (Code of Federal Regulations, Title 14, Section 29.865) requirements, there is a need for an additional measure of safety required by the FAA for use when transporting Human cargo, Precision Lift Research and Design group created the Manual Lockout to prevent inadvertent release of Human Cargo.