Diagram for determining the advance characteristic of the Goshawk ignition governor.
| Identifier | ExFiles\Box 51\5\ Scan225 | |
| Date | 23th March 1922 | |
| DIAGRAM FOR DETERMINATION OF ADVANCE CHARACTERISTIC OF GOSHAWK(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) IGNITION GOVERNOR DYNAMIC COUPLE OR SPRING COUPLE (Arbitrary Units) 80 70 60 50 40 30 20 10 1500 R.P.M. 1250 R.P.M. 1000 R.P.M. 750 R.P.M. 500 R.P.M. 250 R.P.M. Angular Position of Governor Weights 40 45 50 55 60 65 70 75 80 85 90 Angular Advance of Cam. -4 0 4 8 12 16 20 24 28 32 36 1 2vI II III IV A E.P.C. 23/3/22 | ||
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).