Rolls-Royce Archives
         « Prev  Box Series  Next »        

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).
Issues and solutions for the Bentley petrol feed, radiator shutters, and front spring shackles.

Identifier  ExFiles\Box 30\4\  Scan167
Date  10th May 1934
  
-4- Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}14/MA.10.5.34. Cont'd.{John DeLooze - Company Secretary}

Bentley Petrol Feed.

The recent Phantom tests in France have shown that our existing scheme of having electric petrol pumps fitted on the dashboard, running our petrol pipes up and down the dashboard to the tap and then carrying them inside the bonnet to the filter and carburetter is an impossible scheme for Continental Summer conditions; vapour lock is bound to occur. Experimentally we have rigged up petrol pumps and filter combined in one casting. If this can be combined with the S.U. petrol tap the whole unit could be fitted at any point on the frame adjacent to the carburetters and the pipes carried outside until this unit was reached; then passing by the shortest possible route to the carburetters. The tap can be remote controlled which we think advantageous as then the operating handle can be fitted on the instrument board in an easily accessible position.

Radiator Shutters.

All our radiator shutters rattle. As we get better timing gears, silent tappets, cushioned engine mounting etc., these rattles are emphasised. In some cases they are really very bad. We recommend that investigations should be made to see whether we can improve the design to overcome the fault.

Bentley Springs Shackled at the Front.

We have been running this scheme on the streamlined car. It prevents "Tramp" when braking at high speeds. It also reduces the lost movement due to spring in the front brake linkage. It gives better axle control under violent braking.

The geometry of the torque arm and spring movement may be criticised, but in practice we have found no undesirable features. Actually it only becomes pronounced on max. bump and rebound and these are seldom attained. If the design could allow a few thousandths of spring controlled ball end movement either side of the normal position this would compensate for geometry errors without affecting the general result.

Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}
  
  


Copyright Sustain 2025, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙