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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Customer complaints regarding the springing and ride comfort of the 40/50 HP model.

Identifier  WestWitteringFiles\O\2January1926-March1926\  Scan13
Date  2nd February 1926 guessed
  
contd :-
-2-
is 92 to 96 oscillations per minute. On the 40/50 HP. it is
72 to 75 oscillations per minute.
In spite of the fact that the 40/50 is sprung relat-
ively lighter than the 20 HP., the springing complaints on the
40/50 HP. are fairly frequent, whereas on the 20 HP. we very
rarely get a complaint. In most of the cases of complaint on
the 40/50 HP. it is found that the springs fitted to the car
have been too stiff owing to the estimated weights given for
building the chassis being too high. When correct springs
have been fitted, most of the complaints are overcome.
We occasionally get customers with 40/50 HP. cars
whom we cannot satisfy even with radical changes to the springs.
The same methods are used by the same people for
estimating the weights so that it would appear the reason we
do not get complaints of the wrong springs being fitted to the
20 HP., is either that the springing is not so sensitive, or
because there is not such a big range of variable weights.
We think it can be established that 85% of the
springing complaints come from customers riding in the rear seats.
It would appear that the original impression of the
20 HP. springing which was - that there was less difference
between the comfort of the front and rear seats compared with the
40/50 HP., has been proved by the result of cars in customers
hands.
We have had it quoted that both the Lanchester and
Sunbeam cars, both of which have canti-lever springing similar
to the 40/50 HP. RR., are very much more comfortable to ride in
than the 40/50 HP. RR.
contd :-
  
  


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