The amplitude is limited by the way the innerduct is constrained, ie., the walls of exterior conduit, the diameter of a back-reamer hole, etc. The model treats this displacement as two dimensional. The higher the magnitude of the amplitude, the higher the Duct Factor and the higher the bend degrees in the in the duct per period. The period is a measure of the frequency of the displacement. Period length is typically influenced by duct reel memory.
Lengths representing the circumference of the duct reel are a good place to start.
The shorter the period, the higher the Duct Factor and the greater the bend in any given length of duct. In this model, the period must be greater than zero and at least three times the amplitude . However, the period cannot be greater than half of the total run length . The start to end distance for the straight section. The run length must be greater than zero and at least twice the period length .