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).
Solutions for piston seizures on chassis B-68-BN for Lord Amherst of Hackney.
| Identifier | ExFiles\Box 88\1\ scan0150 | |
| Date | 21th January 1935 | |
| v7961 To By: Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}5/KW.21.1.35. Re Chassis B-68-BN.{W.O. Bentley / Mr Barrington} Lord Amherst of Hackney: Replying to BY.32/N.15.1.35, these piston seizures are certainly very disconcerting. We have two factors which will undoubtedly reduce this trouble - (1) Fitting Lead Bronze Bearings. This will undoubtedly increase the flow of oil through the bearings and therefore reduce the tendency for piston seizure. (2) The Aerolite Piston. At present we cannot say that the Aerolite piston will be a cure, but it certainly should be better because it has more cold clearance than the split skirt, and presumably cold clearance has considerable effect on seizure. Furthermore, the Aerolite piston has a larger bearing surface. In addition to these two features, both of which are being standardised, the scheme for squirting oil on to the cylinder walls has now completed 15,000 miles in France and if we do not get out of this trouble with the two modifications previously mentioned we shall have to consider standardising it. Unfortunately it needs the drilled up connecting rods. If we get two or three cases where the owner succeeds in seizing a piston twice, this is the cure we recommend even though it means a new set of rods. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||