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 the performance of a CC Type Car Heater, testing the effect of varying the fan blade angle.
| Identifier | ExFiles\Box 137\1\ scan0214 | |
| Date | 15th December 1936 guessed | |
| CC TYPE CAR HEATER (No 2) L.621. B.2. File Harding TESTED WITH 5¼" DIA: BLOWING AND SUCKING FANS. 12 V.{VIENNA} KLAXON MOTOR TYPE ECM 6 TUBES, TYPE 23/3/8/22/1³/8/34/68.8/.075 N°18 EFFECT OF VARYING THE MEAN BLADE ANGLE OF THE FAN. LEGEND: X ------ BLOWING FAN ⊚ ------ SUCKING FAN CONSTANTS: VOLTS = 12.0 WATER = 20 LBS/MIN. AIR INLET = 60°F WATER MEAN = 180°F Y-AXIS LEFT: MOTOR WATTS. Y-AXIS RIGHT: B.T.U'S./HR./120°F T.D. AIR INLET TO WATER MEAN. X-AXIS: FAN MEAN ANGLE ° GRAPH LABELS: B.T.U'S, WATTS | ||