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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).
Complaints from America regarding intermittent fuel feed and squeaking brakes on the 20-HP chassis.

Identifier  ExFiles\Box 53\4\  Scan013
Date  7th January 1925
  
C. Hs.{Lord Ernest Hives - Chair}

X4584

EP{G. Eric Platford - Chief Quality Engineer}9/H7.1.25.

re. 20-HP. Chassis - U.S.A. Troubles.

We have received the following complaints from America, which they point out have arisen on the 20-HP cars, and they request that they should be supplied with the fullest possible information from our experience of these cars in England.

1. "Intermittent Fuel Feed.
Since these are not the Stewart Warner vacuum tanks which are standard in this country, all service work on them has to be done on our stations.

It has appeared to us on several of the 20-HP cars that there is considerable variation in the supply of fuel to the carburetter causing a fluctuation in speed of the engine.

In several cars also there has been a temporary failure in the feed.

We have suspected the presence of dirt but have not made a permanent cure by removing it, so that we cannot be sure that this is the trouble.

We would like to know whether there is a needle valve seating which needs watching, or other "danger points" on the system.

2. Squeaking Brakes.
We meet this trouble occasionally on the 40/50 especially when the hardness of the brake drums is on the low side. We have therefore gradually increased the hardness of the drums, till they are now 269 - 302 Brinell, and we are holding as close as we can to the upper limit.

On the 40/50, however, a car which squeaks can can always be made to squeak by a gentle pressure on the foot pedal.

On the 20-HP the occurrence is intermittent and similar conditions do not always produce the squeak.

For this reason the trouble is difficult to locate.

Sgd. M.{Mr Moon / Mr Moore} Olley
Contd.

[Handwritten note in left margin]:
Air lock?
  
  


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