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).
The addition of oil holes to the gudgeon pin bosses of 20HP pistons.
| Identifier | ExFiles\Box 105\2\ scan0185 | |
| Date | 4th September 1928 | |
| By Hs{Lord Ernest Hives - Chair} X5040 Mx{John H Maddocks - Chief Proving Officer}4/T4.9.28. RE PISTONS With reference to the addition of oil holes to the gudgeon pin bosses, recently instructed for the Phantom Piston. We think that a similar modification to the 20HP Piston would be beneficial although it is not so necessary with this size of piston. The holes could we think be put in without any alteration to the casting. We carried out some tests of this oil hole on 20HP pistons some time ago, and we are satisfied that they are an advantage. | ||