Performance graph for the J.III rear 40/40 lb. low-pressure hand control system at various RPMs.
| Identifier | ExFiles\Box 56\1\ Scan257 | |
| Date | 29th December 1932 | |
| J.III REAR 40/40 LB. LOW PRESSURE R.R.S. 269 - HAND CONTROL VALVE SPRING RATING 80 LB IN APPROX. DOUBLE DIAPHRAGM - A.C. x P.B. 1" STROKE % CONTROL MOVEMENT - MAX 100" 540 R.P.M 360 R.P.M 180 R.P.M 90 R.P.M 150 100 50 25% 50% 75% 100% | ||
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).