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} | ||