Benning National Guard WTU Air Assault Phase 1 Practice Test 2026 - Free Air Assault Practice Questions and Study Guide

In sling-load operations, the TDP size is tied to the aircraft and sets the safe clearance distance from the helicopter to the load so rigging and flight can be performed without interference. For the UH-1 Huey, the standard TDP length is 35 meters. This distance provides enough room for the crew to hook up the sling, for the load to hang freely without hitting the rotor wash or aircraft structure, and for the helicopter to maintain proper control during the hookup and initial lift.

Other aircraft have different TDP needs because of their size and flight characteristics: a smaller helicopter uses a shorter TDP, a larger one a longer one, and long-line operations use a much longer distance as a separate method. So 35 meters is the appropriate TDP size for the UH-1 Huey.