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 relationship between locking pressure, damping pressure, and valve spring load for Spectre 2 auto lock dampers.
| Identifier | ExFiles\Box 95\4\ scan0024 | |
| Date | 7th June 1935 | |
| SPECTRECodename for Phantom III 2. AUTO LOCK DAMPERS RELATION BETWEEN LOCKING PRESSURE, DAMPING PRESSURE, AND VALVE SPRING LOAD - Ex 17563 SPRING PRESSURE LB/□" 1200 1000 800 600 400 200 VALVE SPRING LOAD - LB 20 40 60 80 100 DAMPING PRESSURE LOCKING PRESSURE 7-6-35 B | ||