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).
Defect in the Phantom III Tappet Oil Filter, detailing a modification to correct a bad oil seal.
| Identifier | ExFiles\Box 135\3\ scan0139 | |
| Date | 19th February 1937 | |
| Piles [signature] 1139 BY c.Fwd.HPS.{Horace Percy Smith - Experimental Factory Mgr}Mx.{John H Maddocks - Chief Proving Officer} E/JNR.{Charles L. Jenner}2/HP.19.2.37. Phantom III Tappet Oil Filter. We understand that Mx.{John H Maddocks - Chief Proving Officer} has pointed out that there is a defect in the present filter where it fits in the bottom of the filter pot resulting in a bad oil seal. This seems to be so, and is caused by making the filter pot in two pieces, the bottom portion being sweated in. However if it is cheaper to make the pot this way it can be left unchanged. We send you herewith LeC.5530 showing the bottom of the filter blanked off at the end, which will modify the piece E.87794. This will correct the job with the minimum amount of alteration. The filter also cannot now be inadvertently inserted upside down. LeC.5530 herewith. E/JNR.{Charles L. Jenner} | ||