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).
Radiator and crankcase pressure test results for the S.S. I. Spectre at various speeds.
| Identifier | ExFiles\Box 91\4\ scan0164 | |
| Date | 30th July 1935 | |
| 3. S. I. SPECTRECodename for Phantom III L300a 30.7.35 RADIATOR TESTS. Thermostats Valves Out. SPEED 80 MPH. Thermostats Valves In. W A T E R W A T E R Cylind.Outlet Drop in Temp. Cylind.Outlet Drop in Temp. Miles. Air. Block. from Rad. Miles. Air. Block. from Rad. 1 15°c 76°c 65°c 11°c 1 17°c 73°c 62°c 11°c 2 15 75 63° 12 2 17 72 61 11 3 15 75 64 11 3 17 72 61 11 4 15 75 64 11 4 17 71 61 10 5 15 78 64 11 5 17 74 62 10 6 15 78 65 13 6 17 78 65 13 7 15 76 64 12 7 17 76 64 12 8 15 76 63 13 8 17 76 63 13 9 15 75 63 12 9 17 75 63 12 10 15 75 63 12 10 17 75 63 12 Thermostats Valves Out. SPEED 60 MPH. Thermostats Valves In. W A T E R W A T E R Cylind.Outlet Drop in Temp. Cylind.Outlet Drop in Temp. Miles. Air. Block. from Rad. Miles. Air. Block. from Rad. 1 15°c 81°c 69°c 12°c 1 17°c 70°c 60°c 10°c 2 15 75 64 11 2 17 66 58 8 3 15 70 60 10 3 17 65 58 7 4 15 66 59 7 4 17 65 58 7 5 15 66 59 7 5 17 65 58 7 6 15 64 58 6 6 17 69 60 9 7 15 65 58 7 7 17 67 60 7 8 15 64 57 7 8 17 66 59 7 CRANKCASE PRESSURES. SPEED 80 MPH. A B WITH PIPE BREATHER TO CRANKCASE NO PIPE BREATHER TO CRANKCASE Position Pressures Taken Position Pressures Taken MPH. OS Filler Pipe. NS{Norman Scott} Crankcase MPH. OS Filler Pipe. NS{Norman Scott} Crankcase 20 0 0 20 + .05 + .1 30 + .1 + .05 30 + .1 + .15 40 + .1 + .1 40 + .15 + .15 50 + .15 + .05 50 + .2 + .2 60 + .15 0 60 + .25 + .2 70 + .15 - .05 70 + .2 - .1 80 + .1 - .1 80 + .1 - .2 85 0 - .1 85 + .1 - .2 Max.Pressure on Decelleration + .4 Max.Pressure on Deceleration + .7 Min.Pressure on Acceleration - .4 Max.Pressure on Acceleration - .7 | ||