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 
Blowing cold on engines
Page 24
If you've noticed an error in this article please click here to report it so we can fix it.
THE FIRST of Airscrew Howden's new lightweight range of mixedflow engine-cooling fans has completed its development programme and is to go into production at the company's Weybridge factory.
Initially, the major applications for the new fans are expected to be in heavy off-highway equipment and specialist road-going vehicles.
Airscrew Howden claims that the fan's aerodynamic design enables it to handle the volume flow of a comparably sized axia fan while delivering the press. ure normally associated with E centrifugal blower.
This means that it is possible to have a smaller and quieter fan as well as more compact radiators.
The fans are the product of E long-term development pro• gramme backed by experiencE of similar mixed flow units ir military vehicles.
The military fans are of casi aluminium construction but, foi the new commercial units, Airs. crew Howden has adopted a de. sign fabricated from sheet aluminium and steel.
The first of the new mixed flow fans the 630mm (25in) o/d unit has already undergone tests in the 466kW (625bhp) Scammell Commander.