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 performance diagrams for a J III Rear 40/40 Lb. High Pressure system with governor pipes.
| Identifier | ExFiles\Box 105\3\ scan0302 | |
| Date | 17th October 1932 | |
| Graph 1 (Top-Left): J III REAR 40/40 LB HIGH PRESSURE .250" DIA. GOVERNOR PIPES 180 R.P.M - 1" STROKE (0.5 FT/SEC. M.A.V.) Date: 17.10.32 Ref: G.5. Y-Axis: 308 LB/D² = 133 LB B.P. X-Axis: 120" | 1.5 Legend: M.P.H. 80, 60, 30 Note: NORMAL DIAGRAM Graph 2 (Top-Right): J.{Mr Johnson W.M.} III REAR 40/40 LB. HIGH PRESS.E .250 DIA. GOVERNOR PIPES. 540 R.P.M - 1" STROKE (1.5 FT/SEC. M.A.V.) Date: 17.10.32 Ref: G.6 Y-Axis: 308 LB/D² = 133 LBS B.P Legend: M.P.H. 80, 60, 30 Note: NORMAL DIAGRAM. Graph 3 (Bottom-Left): J III REAR. 40/40 LB. HIGH PRESSURE .250 DIA GOVERNOR PIPES 45 R.P.M 4" STROKE. (0.5 FT/SEC. M.A.V.) Date: 17.10.32 Ref: G.7. Y-Axis: 462 LB/D² = 200 LB B.P X-Axis: 180" | 1.5 Legend: M.P.H. 80, 60, 30 Note: NORMAL DIAGRAM Graph 4 (Bottom-Right): J.{Mr Johnson W.M.} III REAR. 40/40 LB. HIGH PRESSURE. .250" DIA. GOVERNOR PIPES. 180 R.P.M. 4" STROKE. (2 FT/SEC. M.A.V.) Date: 17.10.32 Ref: G.8 Y-Axis: 462 LB/D² = 200 LBS B.P. X-Axis: 180" | 1.5 Legend: M.P.H. 80, 60, 30 Note: NORMAL DIAGRAMS. | ||