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 a 3. S. I. Spectre.
| Identifier | ExFiles\Box 91\3\ scan0060 | |
| Date | 30th July 1935 | |
| Steadman 3. S. I. SPECTRECodename for Phantom III <3004 30.7.35 RADIATOR TESTS. Thermostats Valves Out. SPEED 80 MPH. WATER Miles. Air. Cylind.Block. Outlet from Rad. Drop in Temp. 1 15°c 76°c 65°c 11°c 2 15 75 64 11 3 15 75 64 11 4 15 75 64 11 5 15 75 64 11 6 15 78 65 13 7 15 76 64 12 8 15 76 63 13 9 15 75 63 12 10 15 75 63 12 Thermostats Valves In. WATER Miles. Air. Cylind.Block. Outlet from Rad. Drop in Temp. 1 17°c 73°c 62°c 11°c 2 17 72 61 11 3 17 72 61 11 4 17 71 61 10 5 17 74 63 10 6 17 78 65 13 7 17 76 64 12 8 17 76 63 13 9 17 75 63 12 10 17 75 62 13 Thermostats Valves Out. SPEED 60 MPH. WATER Miles. Air. Cylind.Block. Outlet from Rad. Drop in Temp. 1 15°c 81°c 69°c 12°c 2 15 75 64 11 3 15 70 60 10 4 15 66 59 7 5 15 66 59 7 6 15 64 58 6 7 15 65 58 7 8 15 64 57 7 Thermostats Valves In. WATER Miles. Air. Cylind.Block. Outlet from Rad. Drop in Temp. 1 17°c 70°c 60°c 10°c 2 17 66 58 8 3 17 65 58 7 4 17 65 58 7 5 17 65 58 7 6 17 69 60 9 7 17 67 60 7 8 17 66 59 7 CRANKCASE PRESSURES. SPEED 80 MPH. A WITH PIPE BREATHER TO CRANKCASE Position Pressures Taken MPH. OS Filler Pipe. NS{Norman Scott} Crankcase 20 0 0 30 + .1 + .05 40 + .1 + .1 50 + .15 + .05 60 + .15 0 70 + .15 - .05 80 + .1 - .1 85 0 - .1 Max.Pressure on Decelleration + .4 Min.Pressure on Acceleration - .4 B NO PIPE BREATHER TO CRANKCASE Position Pressures Taken MPH. OS Filler Pipe. NS{Norman Scott} Crankcase 20 + .05 + .1 30 + .1 + .15 40 + .15 + .15 50 + .2 + .2 60 + .25 + .2 70 + .2 - .1 80 + .1 - .2 85 + .1 - .2 Max. Pressure on Deceleration + .7 Max. Pressure on Acceleration - .7 | ||