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).
Test report discussing the effectiveness of an air cleaner in preventing a sticking air valve on a cylinder and head.
| Identifier | ExFiles\Box 135\4\ scan0106 | |
| Date | 27th September 1926 | |
| Gy2-E-92726 HS.{Lord Ernest Hives - Chair} September 27, 1926 To: Messrs.Beaver Nadin Bagnall Caswell Hulley Knapton Burton cc - Mr.B.Johnson Mr.F.H.Royce Mr.E.W.Hives London File From: Mr. Olley TEST REPORT Sec.5050 - Cylinder and Head On September 20th in a report under this heading I referred to the apparent freedom from carbon due to fitting an air-cleaner, and also stated our belief that an effective air cleaner greatly reduced the tendency for the air valve to stick. On further consideration I feel somewhat doubtful as to the supposed effect of the cleaner on a sticking air valve, although our records so far (on one car) seem to indicate that an effective cleaner gets rid of the trouble. We have not connected the holes in the base of the air valve cylinder with the cleaner, so that one would expect dirt to enter the valve cylinder by this route. In a scheme which we propose to submit shortly for applying an air cleaner to existing cars in Service, we are going to pass the air which enters the base of the valve cylinder, through the cleaner, so that theoretically no dust can reach any working part of the carburetter. We believe this should entirely obviate a sticking air valve even under the most dusty road conditions. Oy. MO/E | ||