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).
Graph showing the results of exhaust valve clearance tests on a B.3 high power unit for Bentley.
| Identifier | ExFiles\Box 90a\4\ Scan227 | |
| Date | 20th May 1936 | |
| EXHAUST VALVE CLEARANCE TESTS (BENTLEY) B.3 UNIT (HIGH POWER UNIT) LOST CLEARANCE (VALVE STRETCH + HAMMERING OF SEAT) INCHES HOURS RUN No 1 CYL. (RS.{Sir Henry Royce's Secretary}275 VALVE) No 6 CYL. (RS.{Sir Henry Royce's Secretary}276 VALVE) No 3 CYL. (EX.21586 VALVE) No 4 CYL. (EX.21586 VALVE) No 2 CYL. (RS.{Sir Henry Royce's Secretary}275 VALVE) No 5 CYL. (RS.{Sir Henry Royce's Secretary}276 VALVE) MTHS{Reg Matthews} 20.5.36 B.V. 36 | ||