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).
Modifications to the SS engine oil level indicator.
| Identifier | ExFiles\Box 175\6\ img006 | |
| Date | 11th February 1929 | |
| X. 7200 E2/M11.2.29. Hs.{Lord Ernest Hives - Chair} from E.{Mr Elliott - Chief Engineer} c. to Wor.{Arthur Wormald - General Works Manager} BY.{R.W. Bailey - Chief Engineer} SS.{S. Smith} ENGINE OIL LEVEL INDICATOR. On the original drawing of the above - LeC. 2497 there is a note asking for the oil indicator readings to be finally determined by actual trial owing to the difficulty of calculating the sump volumes with sufficient accuracy. Now that you have tested it we appreciate where it was in-accurate, but do not like adding weight to the float because it reduces the buoyancy and power of the indicator, and also reduces its range since the float touches bottom sooner. We think the most satisfactory method of adjustment is to alter the position of the fulcrum pin .18" on the float lever, thereby increasing the float lift 20%. This should give 30% more power to overcome indicator friction than a loaded float. These figures are calculated from your report which gives 12° out of the 60° total needle range for the last .25 gallon. The float arm requires a slight displacement upwards in shape to accommodate the increased upper movement. We will send a drg. shewing these modifications. E.{Mr Elliott - Chief Engineer} | ||