1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260 
The Iceman Cometh
Page 151
If you've noticed an error in this article please click here to report it so we can fix it.
IN CASE the gentleness of the 1966-67 winter has made anyone complacent Mr. W. E. Weisflog's Recent Developments in Snow Clearing Machinery and Methods published earlier this year, shows that the experts are forecasting harder winters for the future than those experienced during the first 40 years of the present century.
Conditions of snow and ice vary so widely that the Rolba volume mentioned, with its wide-ranging treatment of the subject and many illustrations, will repay close examination. In the hillier counties the Rolba-Unimog snowblower seems to have made good progress lately. This unit is certainly well proved for Aberdeen put Britain's first one into action 11 years ago.
A notable feature of the design is the milling-centrifuge in which the snow is gathered by means of rotating helical cutting blades which force it into the impeller. The impeller, which works at twice the speed of the helical cutters, gives the necessary further speed-up so that the snow is cast well clear of the cutting area.