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).
List of experimental cars showing mileage covered during hydraulic tappet tests.
| Identifier | ExFiles\Box 158\4\ scan0191 | |
| Date | 29th October 1937 | |
| Rm.{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies} 29.10.37. We give below a list of experimental cars and show the mileage covered on hydraulic tappets, this includes tests carried out in France, Kenya, Cars on dyno, etc. During the whole of this mileage we have never had to change a tappet through noise, we have, however, had to change broken bottom tappet springs. 30-EX. 1-S-1 Unit - 9,675 ) No.4 " - 15,452 ) 25,127 miles. 31-EX. 2-S-1 Unit - 3,621 ) No. 4 " - 252 ) " 10 " - 12,100 ) 15,973 " 32-EX. 3-S-1 " - 9,960 ) No. 9 " - 29,062 ) 39,022 " 33-EX. No. 6 " - 10,409 ) " 10 " - 28,772 ) 39,181 " 34-EX. No. 7 " - 14,000 ) 14,000 " (Kenya Trip) 35-EX. No. 8 " - 25,935 ) " 9 " - 28,977 ) 54,912 " 36-EX. No.11 " - 35,522 ) 35,522 " 37-EX. " 12 " - 18,728 ) " 9 " - 2,898 ) 21,626 " 38-EX. " 15 " - 2,043 ) 2,043 " 39-EX. " 14 " - 4,627 ) 4,627 " Total = 252,033 " Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies} | ||