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).
The status and proposed improvements for various vehicle components, including springs, axles, and brakes.
| Identifier | Morton\M13.2\ img046 | |
| Date | 8th May 1931 | |
| -2- Hs.{Lord Ernest Hives - Chair}/W.J.8.5.31.Cont'd.{John DeLooze - Company Secretary} ROAD SPRINGS. It is very definite that we make a considerable improvement to the 25 HP. springs by fitting springs of the low rating type. These are fitted to 16-G4 at N.W. The point we are worried about is that the stress in the front springs especially is very high. The initial camber has been increased from 2.25" to 4". We have run these springs on the bump and they have not failed, but we do not feel very happy about them because previously in customers hands 20 H.P. front springs gave a lot of trouble with braking and in order to overcome it we had to reduce the initial deflection. On the low rating springs we have now increased it beyond what it was originally and therefore the only reason why the spring should last better is because of the improved materials and manufacture. What we really want is increased length in the front spring. FRONT AXLE. The front-axle will have to be the present standered but with the lower rating springs we should have liked axle control. REAR AXLE. On the two occasions which the hypoid axle has been run on a 10,000 miles test, it has failed each time. The last time it was found the reason was the housing for the pinion thrust. We do not consider, however, that we are in a position to standardise this axle without further test, therefore the present standard rear axle should be instructed. PROPELLER SHAFT. We are definitely of the opinion that we ought to have the larger diameter propeller shaft. DYNAMO. We have improved dynamos for the 25 HP. A report is being prepared. This will include two-charge scheme. STEERING. Present standard. STARTER. Present standard. BRAKE. Present standard, with anti-squeak shoes. The items which will definitely have to be held up are (1) Induction pipe carburettor (2) gearbox (3) exhaust system. The Expl. Dept. are preparing a report on the exhaust system. There are a number of other features such as wheel carriers, petrol tank, etc., which need consideration. Hs.{Lord Ernest Hives - Chair} | ||