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).
Four graphs showing performance data for governor pipes under varying RPM, stroke, and speed conditions.
| Identifier | ExFiles\Box 105\3\ scan0301 | |
| Date | 17th October 1932 guessed | |
| Top Left Graph (G I): 40/40 LB. 180 R.P.M. 1" STROKE. HIGH PRESS. ·156" GOVERNOR PIPES G I 80 M.P.H. 60 M.P.H. 30 M.P.H. NORMAL 308 LBS/D" 120" I.S. Top Right Graph (G II): 40/40 LB. 540 R.P.M - 1" STROKE. HIGH PRESSURE. ·156" GOVERNOR PIPES G II 80 M.P.H. 60 M.P.H. 30 M.P.H. NORMAL 308 LBS/D" 120" I.S. Bottom Left Graph (G III): 40/40 LB. 45 R.P.M. 4" STROKE. HIGH PRESS. ·156" GOVERNOR PIPES. G III 80 60 30 RETURN TO N N. 308 LBS/D 180" I.S Bottom Right Graph (G IV): 40/40 LB. 180 R.P.M. 4" STROKE. HIGH PRESS. ·156" GOVERNOR PIPES G.IV 80 60 30 N 308 LBS/D" 180" I.S. | ||