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).
Progress report on car 21-G-IV, detailing recent modifications and outlining future testing plans.
| Identifier | ExFiles\Box 101\4\ scan0145 | |
| Date | 14th December 1935 | |
| To Sg.{Arthur F. Sidgreaves - MD} c. to Wor.{Arthur Wormald - General Works Manager} c. to K.{Mr Kilner} c. to Dy.{F R Danby} c. to MX.{John H Maddocks - Chief Proving Officer} x500a Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}3/KW.14.12.35. 21-G-IV. This car is now completed according to the specification given in Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}29/KW.5.11.35. The following items have been added since that date :- (1) Steering preloaded to reduce road shocks. (2) Petrol system arranged to avoid vapour lock. (3) Front roll rod to overcome undesirable effects due to low rating road springs. (4) 45° helix angle timing gears to assist production in obtaining quiet gears. (5) Improved "Jackall" Jacks. This car is not the final big bore unit, because it has not the turbulent type 20/25 cylinder head, nor has it the final drain scheme on the induction system. It is quite useless to run it endurance because the final engine will differ in such important points as bearings, pistons, etc. However, we do think it would be exceedingly useful to get an average impression of the Stromberg carburetter away from the works, also the 11" Borg & Beck clutch and the low rating road springs. We are proposing to arrange for it to run from Shardlow, but that the object of the test shall be investigation rather than mileage. In particular, we have in mind that work in hilly districts should show up the worst features both of the clutch and the carburetter. We are following on with the final big bore unit. It should be appreciated that the new cylinder head which is at present on the machines may affect carburation, and furthermore that there is some development work to be done on the drain in the induction system. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||