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 governor pipe pressure characteristics under various conditions.
| Identifier | ExFiles\Box 179b\2\ img101 | |
| Date | 17th October 1932 guessed | |
| Graph GI: 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 'IS Graph GII: 40/40 LB. 540 R.P.M.- 1" STROKE. HIGH PRESSURE .156" GOVERNOR PIPES G II 60 M.P.H 80 M.P.H 30 M.P.H. NORMAL 308 LBS/D" 120 'IS Graph GIII: 40/40 LB. 45 R P M 4" STROKE. HIGH PRESS .156" GOVERNOR PIPES G III 80 60 30 RETURN TO N N Graph GIV: 40/40 LB. 180 R.P.M. 4" STROKE. HIGH PRESS .156" GOVERNOR PIPES G IV 80 60 30 N 308 LBS/D" 120 'IS | ||