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).
Customer complaints and potential solutions for piston knock and brake squeaks on Phantom II cars.
| Identifier | ExFiles\Box 15\3\ Scan056 | |
| Date | 21th April 1931 | |
| HS{Lord Ernest Hives - Chair} To W.Or. From Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} 87040 Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux}2/KT.21.4.31. X4117 (1) Piston Knocks. Hs.{Lord Ernest Hives - Chair} and Rm.{William Robotham - Chief Engineer} are of the opinion that extra oil to the cylinders is a help, but they are of the opinion that the longer skirt piston should reduce the tendency of piston knocks. Hd.{Mr Hayward/Mr Huddy} is of the opinion that Phantom II pistons are an improvement over Phantom I and the fitting of the extra oil does not justify the extra cost. Copy of memo. received from Cricklewood. N/W. Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} Br1/WG.{Mr Gill - Financial Director}20.4.31. re Piston knocks on Phantom II chassis. With reference to your Hs{Lord Ernest Hives - Chair}/GWH{George W. Hancock - Head Chateauroux}4/KT.16.4.31. we at N consider that piston knocks on Phantom II cars are very much inkeeping with those on the later Phantom I cars. By this we mean that in most cases when the mileage is getting on towards 20,000 piston knocks are very audible, when we have to advocate what is known as the R.20 decarbonisation which of course costs twice as much as an R.10! We get many complaints of piston knocks cold on Phantom II's, and if the mileage does not justify the R.20 we endeavour to re-assure the owners with a view to postponing attention until the R.20. We do feel that the introduction of the extra oiling device would go a long way towards curing this trouble as it appears to us that damage is done when starting up from cold, but for piston knocks it would be possible to give a Phantom II engine two or even three R.10 decarbonisations, and thereby we should save considerable expense to the owners, especially as so many of them nowadays are inclined to grumble at our charges. Br.{T. E. Bellringer - Repair Manager} The longer skirt piston and the extra oil are to be incorporated in future. Hy.{Tom Haldenby - Plant Engineer} states that it is impossible to incorporate the extra oil to the present cars. (2) Brake Squeaks. Hs.{Lord Ernest Hives - Chair} has received a report from Hd.{Mr Hayward/Mr Huddy} There have been six customers cars fitted with the anti-squeak brakes, the | ||