Aerodynamic Characteristics of Helicopter with Ducted Fan Tail Rotor in Hover under Low-Speed Crosswind

Table 2

Information on grid test.

Grid	Total cells	Time (h)
Gird 1	13,648,221	42 hours	9.08%	-2.3%
Grid 2	19,073,359	63 hours	3.12%	-0.27%
Grid 3	26,456,880	108 hours	—	—