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).
Reprint from 'The Motor Boat' magazine describing the Blackman petrol filter for marine engines.
| Identifier | ExFiles\Box 44\1\ Scan090 | |
| Date | 21th January 1927 | |
| X403-7 FILE UNDER FILTERS PLEASE Reprinted from “THE MOTOR BOAT,” January 21, 1927. A NEW PETROL FILTER FOR MARINE MOTORS. Although of recent introduction, the Blackman petrol filter has met with much success in connection with motorcars. In order to increase the field of utility, a new model has just been designed, and this is intended for marine use. The filter is supplied in two sizes, the smaller of which is suitable for engines up to about 25 h.p., whilst the larger model is intended for higher powers, the prices being 20s. and 25s. respectively. An idea as to the functioning of the filter may be ascertained from the sketch. The petrol inlet is by way of the lower union. Any water, fluff or sediment settles in the sump at the lower extremity of the device. In passing, it may be noted that the sump is drained by opening the combined thumb-screw and cap indicated, but this is permanently attached to the filter to prevent its being inadvertently lost. Immediately above the sump is a perforated baffle. This is intended to keep any foreign matter which might tend to choke the filtering surfaces from rising out of the sump. The gauzes, which are four in number, are placed two at the top and two at the bottom of a brass drum, which may speedily be removed for examination when necessary. Not the least important feature of the device is the ease with which it may be fitted. The unions are of a special type, in connection with which a punch is furnished, enabling petrol-tight connections to be made with a copper pipe without the necessity of sweating or brazing the joints. Recent demonstrations of the device showed that the filter is capable not only of removing water and other foreign matter likely to be found in the petrol, but when a quantity of fuel was mixed with steel filings, fluff and ink, the petrol flowing from the filter was absolutely clean and the device showed no tendency to choke. We are of the opinion that a filter should form a more prominent feature of the average marine installation than is actually the case, and the fact of having to employ a car-type filter for marine work is frequently an unsatisfactory procedure. The makers are known as the Blackman Petrol Filter Co., Ltd., 10, Grape Street, 210b, Shaftesbury Avenue, London. W.C.2. Image Caption: The Blackman filter for marine work. Temple Press Ltd., 7-15, Rosebery Avenue, E.C.1. | ||