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 
Three New RENAULT
Page 108
Page 109
If you've noticed an error in this article please click here to report it so we can fix it.
SIXES
First Details of a High-powered Chassis for 31seater Coaches and a New Sixcylinder Threetonner. A Sixcylindered Engine for the Smallest Delivery Van
MEM range of goods and passenger 1 chassis offered by Renault, Ltd., of Acton, London, W.3, is rendered particularly complete by the addition of three new six-cylinder models, all of which will be seen at the forthcoming Olympia Show. The most impressive of these is the new S.I. model coach chassis, intended for loads of 31 passengers, but perhaps equally important is the S.Z.-type three-tonner, this being a useful link between the S.X.-model 21-tonner, which was described in our issue for May 7th, and the bigger S.F.type 33-tonner, which has been a popular model in France. In addition to the four-cylinder 7-cwt. van, there will now be offered the new RS. model light van, which has a six-cylindered power unit.
The range thus comprises some 11 models, all the more important being available as six-cylinder chassis.
Dealing first with the new S.I. type, a feature of this machine is that it has an extraordinarily powerful engine, the design of which is based on that of the well-known 45 h.p. unit which has earned for itself such a remarkable reputation in the private-ear world. Like all the other commercial chassis, the &I. model has the radiator mounted around the rear end of the power unit ; the bonnet and nndershield seal the engine housing, so that the fan, Which is incorporated in the flywheel, draws air through the radiator. The engins has side valves and the bore and stroke are respectively 110 ram. and 160 mm., thei six cylinders being cast in two blocks of three.
Instead of the combined dynamo and starter mounted in the familiar position on a forward extension of the crank shaft, the new model has a separate starter engaging with the flywheel and •,a dynamo driven in tandem with the water impeller, these three auxiliaries being placed on the off side. The cylinder head is now detachable in two parts. Another interesting feature is the large-capacity oil radiator, which is mounted just below the foremost frame crossfmember.
The four-jet dual carburetter is fed by an A.C. fuel pump, with whiqh visible-type filter is combined, the induction pipe coming into contact with the exhaust manifold at two hot-spots. Delco-Remy coil ignition is incOrporated, the distributor being mounted on the main auxiliary-drive case at the front of the engine. The water impeller feeds, by way of a Y-shaped pipe, both the cylinder blocks.
Following Renault practice, the engine and single-plate clutch are separate from the gearbox and are mounted in a sub-frame. The four-speed gearbox is carried at the forward end of the large-diameter torque tube, just behind the massive spherical thrust bearing. For strength the torque tube has triangulated bracings. Power is conveyed to the semi-floating axle shafts by bevel pinion and crown wheel.
Springs and Recoil Dampers.
Rear springs are amply strong, being 4 ft. 64 ins. long and 3i ins. wide. The front springs, which are of the same type, are 3 ft. 64 ins, long and 24 ins. wide. The rear springs are, of course, shackled at both ends, and a good feature is that rubber shackle bushes are employed ; four hydraulic recoil dampers are fitted between the rear axle and the frame. The frame itself is of channel section, upswept slightly at the front and arched over the rear axle.
As regards braking, the pedal actuates brakes on all four wheels, the wellknown and tried Renault mechanicalservo system (which operates equally well when in reverse) being interposed. The pedal is also directly coupled independently of the servo mechanism. The hand brake operates on the rear wheel.
Referring to the dimensions of this fast passenger chassis, the wheelbase is 16 ft. 81 ins, and the front track 5 ft. 101 ins., the overall length being 25 ft.
01 in. The frame width is ample, being 3 ft 31 ins., and the height of the frame top., unladen, is 2 ft. 74 ins. The chassis in running order weighs
2 tons 18 cwt. and costs £958. It will be seen at Olympia with a fine 31 seater coach body by Strachans (Acton), Ltd.
The new 3-ton S.Z. model has a sixcylindered engine of 75 mm. bore and 120 mm. stroke. It is similar in general principle to the bigger engine, but has the combined dynamo and starter mounted on a forward extension of the crankshaft. It is also different in having no water impeller. The four-speed gearbox is mounted in the usual position —namely, at the forward end of the torque tube. The road speed at 2,200 r.p.m. on top gear is 274 m.p.h. The overall length of this chassis is 20 ft. 1 in. and the width 6 ft. 21 ins. The wheelbase is 13 ft. 9f ins., this providing a body length of 15 ft. 3 ins, to the end of the chassis frame. The overhang of the frame is 4 ft. 9 ins., and the machine will turn in a circle of 51 ft. 2 ins. diameter. The chassis weighs 1 ton 18 cwt. and sells at £495.
The new. R.Y. model needs no full description, since it is similar, so far as the chassis is concerned, to the N.N.type 9-15 hip. four-cylinder 7-cwt. van. The new model, however, has the 12.5 h.p. six-cylindered engine of ▪ 58 mm. bore and 93 mm. stroke. . • ,. The Popular 24-tonner. AlthoUgh not a new model, the S.X. 2 -toniaer, which is also suitable for 20seqer coach bodies, is sure to create • a impressiOn at Olympia. This has the seine_ engine as theY three-tonner described above, the wheelbase being ▪ slighflyr" shorter—namely, 12 ft 54 lug., . and the overall length, with an overhang of 3 ft. 64 ins., only .17 ft. 5/ ins. It has light% gear ratios and its speed at 2,200 r.p.m. is 43.5 m.p.h. •
'• Other 'machines in the range are the popular R.I. six-cylinder 20-26-seater. the engine of which has a bore ef 85 mm. and a stroke of 140 mm., the 5-ton "a-nd 34-ton four-cylinder goods chassis (the bore and stroke of which are 100 mm. and 160 mm.), and the 37-cwt., 24-cwt. and 12-cwt. models, all of which have four-cylindered engines of 75 mm. bore and 120 ram. stroke.