Hoist SOW.pdf

The AASF Facility is looking to purchase Hoist Cables for the Rescue Hoist mounted on the Medevac aircraft. These cables will be a replacement of the current cables that have reached their end-of-life cycle and are a requirement to allow the crews of this equipment to be fully mission capable and allow for better sustainability.

These cables should be the Four Strand and not the 19x7 cables that were used in the past. The Four

Strand Cable is noticeably stiffer and constructed of all parallel wires, which are tightly compacted, as compared to the 19x7 cable that has more flexibility. The Four Strand cable is more rigid and is far more capable while conducting hoist. It is less susceptible to damage when applying a load to the cable, a lower tendency for oscillations, and has a lower possibility of damage when a cable is shock-loaded.

The Four Strand Cable is a rotationally resistant cable. It is much more resilient to the effects of rotation than a 19x7 cable when in rotation. Due to these characteristics, we are requesting to move away from the old 19x7 cables and adopt the four-strand cable, as it is longer lasting and more durable.

REFERENCE: TD-17-003, NSN: 4010-01-694-9091, PN: KT-681

4-Strand Characteristics:

Four Strand Cable

Rated Operating Capacity….....................6000lbs rated load, 3500lb breaking strength

Construction…........................................4 strands, 19 wires per strand

Characteristics….....................................Rotation Resistant, Damage Resistant

Diameter….............................................3/16" (0.188) inch

High Operating Temperature…...............Equal to Capacity of Rescue Hoist Assembly

High Non-Operating Temperature….......Equal to Capacity of Rescue Hoist Assembly

Low Operating Temperature…...............Equal to Capacity of Rescue Hoist Assembly

Low Non-Operating Temperature….......Equal to Capacity of Rescue Hoist Assembly

Weight….................................................6.8lbs per 100ft of cable

Lubricant (internal)….............................Proprietary, high melting temperature

Salt Spray Resistant….............................Compliant

Sand Dust Resistant….............................Compliant

Standard Chemical Resistant…................Compliant