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).
Required specifications and modifications for various components of Spectre models, focusing on issues like noise reduction.
| Identifier | ExFiles\Box 91\1\ scan0078 | |
| Date | 14th September 1935 | |
| (3) E.3/HP.14.9.35. Dashboard. Mx{John H Maddocks - Chief Proving Officer}'s car with SpectreCodename for Phantom III No.4. with original air chamber on dash filled with asbestos is good for noise insulation but SpectreCodename for Phantom III 2 is equally good with the final LeC. scheme fitted. This latter should, therefore, be instructed. SpectreCodename for Phantom III 3 fan. More powerful fan required. Rm.{William Robotham - Chief Engineer} is making an alternative fan for No.2. with P.2. blades to test. Radiator. SpectreCodename for Phantom III 2 fitted with mark 5 matrix. Mark 6 should be specified for SpectreCodename for Phantom III 3. Oil Cooler. Rm.{William Robotham - Chief Engineer} to provide back pressure with the existing 2 SpectreCodename for Phantom III types and with Buick at low oil temperatures. In the meantime No.2. type is specified for No.3. Bonnet. Bonnet ventilation. Louvred side guards as instructed for No.2. - LeC.4703. Thermo operated bonnet shutters to LeC. 4698. Flywheel of increased dimensions to N.S.4571. as No.2. SpectreCodename for Phantom III. Tappet covers. Noise insulated scheme not required on SpectreCodename for Phantom III. See Hs{Lord Ernest Hives - Chair}/Whyman re LeC. scheme. CLUTCH. As No.2. SpectreCodename for Phantom III with V.M.2.lining and with oilite tail bearing. Square splines as Nc. Sch. 4578. GEARBOX. Noise is still the biggest problem, and a settled design is required for (a) isolated change speed mechanism (b) softer rubber mounting, and with the necessary alterations to floorboards. A scheme is also wanted for the lubrication of the constant mesh gear bushes for which it is decided to use a small gear pump driven on the end of the side shaft. STEERING. Rm.{William Robotham - Chief Engineer} is to investigate the lock that is being obtained. Da.{Bernard Day - Chassis Design} to provide data regarding angles of wheels on full lock | ||