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).
Graph showing results of two performance tests on a Spectre Gear Box.
| Identifier | ExFiles\Box 94\1\ scan0158 | |
| Date | 11th July 1935 | |
| SPECTRECodename for Phantom III GEAR BOX - IHS. TEST 3. GEAR LEVER TORQUE REQUIRED TO DISENGAGE 1ST GEAR RELATIVE TO TORQUE APPLIED TO 3RD MOTION SHAFT. 1ST MOTION SHAFT STATIONARY - MOTORINE 'C' TEST 4. TORQUE REQUIRED TO ROTATE 1ST MOTION SHAFT IN 1ST GEAR AT VARIOUS SPEEDS - MOBILOIL 'C' GRAPH DATA: Y-AXIS (LEFT): POWER LOSS - HP - TEST 4 SCALES: 1.0, 2.0, 3.0 Y-AXIS (RIGHT): GEAR LEVER TORQUE - LB FT - TEST 3 SCALES: 10, 20, 30, 40, 50 X-AXIS (TOP): 3RD MOTION SHAFT TORQUE - LB FT - TEST 3 SCALES: 5, 10, 15, 20 X-AXIS (BOTTOM): 1ST MOTION SHAFT SPEED - R.P.M - TEST 4 SCALES: 200, 400, 600, 800 GRAPH KEY: TEST 3: TEMP 19°C TEMP 40°C WITHOUT OIL TEST 4: TEMP 19°/21°C TEMP 24°/26°C N.B. PLAIN BEARING TYPE BOX. Initials: MB | ||