OCR Text |
Show 11 between 12 December 1952 and 5 May I963, these glide paths were reduced to 50 to 81 cm at a distance of 1.7 m above the net." The influence of small structures as glide inhibitors was also investigated. In the winter of 1955/ 56 the measurements lasted from 11 January to 18 May. The zone of influence of a light- metal snow rake 2.5 cm long and 1.8 m high extended over an area of about 60 m2, with glide paths of 10 to 30 cm. Outside this zone of influence, glide paths of 20 to 60 cm were measured. " On 14 January 1957, 20 light- metal glide shoes were installed in a 1- meter snow cover on the steep slope adjacent to Snow Rake 27. By the time these research markers were dug out on 27 March, they had covered glide distances of 2 to 38 cm. Considering the high density of wood and light- metal snow rakes, and nets, on this study area, and the relatively low snow depth, the gliding must be described as rather strong. Both the wetting through of the snov; cover and the short-grass ground cover must have contributed to the motion. Because the damming effect of the structures is not known, we must conclude that this is relatively moderate. The glide shoes with path lengths of 6, 3, 5 and 9 cm were lightly lodged against obstacles, so the measured values must have been too small. With the determination of an appropriate, readily- measured, but limited effect of supporting structures on snow gliding, earlier observations are confirmed." In the winter of 1957/ 58, the glide research lasted from 12 November to 13 May, The displacement of the 24 glide shoes ranged from 17 to 95 cm, with an average of 57 cm. " The glide path below the snow |