“…Figure 10 shows the wind tunnel experiment on 3D printing skier models with six typical skiing postures. In view of the force factors such as the stability of the single-foot support, when setting the wind speed conditions for the experiment, for the first four postures in Figure 10, the highest incoming wind speed was set higher, and the wind speed was adjusted at 5, 8, 10, 12, 15, 18, 20, 22, 24, 26, and 30 (m/s) respectively; while for the last two postures, the highest incoming wind speed was set lower, and the wind speed was adjusted at 5,8,10,12,15,16,17,18,19,20,21,22, and 24 (m/s) respectively. The main reason is that, both feet of the first four skier models were connected with the circular platform, while only one feet of the last two skier models (the "Push with ski poles once with every two steps" posture and the "Go uphill in a conventional way" posture) was connected to the circular platform, so the wind speed of the first group (the first four models) was set higher than that of the second group (the last two models), so as to prevent the second group models being blown off the platform due to unstable connection and causing damages to the experiment equipment.…”