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).
Modifications and tests for various car components and models including the Spectre, J-B-IV, and 2/25.

Identifier  ExFiles\Box 174\3\  img009
Date  3rd July 1935
  
-3-

HS{Lord Ernest Hives - Chair}/RH.{R. Hollingworth}18/KB.3.7.35.

SpectreCodename for Phantom III Flywheel.

Gry.{Shadwell Grylls} to ensure that the heavier flywheel being reduced experimentally is urged and also that the flywheel with the increased inertia is instructed for the 2 cars to demonstrate at Olympia.

J-B-IV.

In addition to the other jobs we have decided to convert J-B-IV to a large bore unit when it goes into the shop. Figures are being obtained for its performance at Brooklands before the conversion. This should also be fitted with a standard brake system.

2/25 Large bore Cylinder Head.

T. Salt should look into this job to see whether we can by a simple modification make the head more compact and increase the size of the inlet valve.

Side Centres Large Bore Unit.

H.{Arthur M. Hanbury - Head Complaints} Smith should ensure that the cylinder head of this unit gives 6.8 compression ratio.

SpectreCodename for Phantom III Steering.

Hardy is responsible for carrying out tests on the La{L. A. Archer} Salle steering removed from SpectreCodename for Phantom III 1., and following through any merits which may be discovered, with the adamant Engineering Co.

Cross Twisting Tests on the Bentley.

Gry.{Shadwell Grylls} should urge these.

2/25 Consumption Tests.

C. Ratcliffe is responsible for carrying out the tests to determine how much mixture control can be used on the 2/25 existing carburetter without entirely spoiling the performance, and also for determining what improvement in petrol consumption this modification produces.

HS{Lord Ernest Hives - Chair}/RH.{R. Hollingworth}
  
  


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