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).
Performance graph for the Harrison 'Twinflow' Car Heater - Duplex Model.
| Identifier | ExFiles\Box 137\1\ scan0201 | |
| Date | 5th December 1936 | |
| HARRISON "TWINFLOW" CAR HEATER - DUPLEX MODEL ELEMENT - 6" WIDE X 6 1/2" HIGH X 2 5/8" DEEP WEIGHT = 2 1/4 LBS. 11 WATER PASSAGES ABOUT 1 1/2" DEEP. 30 ZIG-ZAG STRIPS BETWEEN WATER PASSAGES. 4 BLADED FAN 5 3/8" DIA. DELCO 12 VOLT MOTOR - SINGLE LEAD - EARTH RETURN. WEIGHT OF MOTOR & FAN = 1 1/4 LBS. AIR FLOW CONTROL BY RESISTANCE & SHUTTERS. TOTAL WEIGHT OF HEATER = 6LBS 2 ozs " " FITTINGS = 10 ozs CONSTANT WATER FLOW = 2 GALLS/MIN. VOLTS OR WATTS AIR FLOW CU.FT./MIN. B.Th.Us./HR/120°F TEMP. DIFFce AIR IN TO WATER MEAN WATTS VOLTS DISSIPATION LOWEST CONTROL ON RHEOSTAT APPROX. MIDWAY FULLY "ON" RHEOSTAT CLAYTON DEWANDRE CO LTD TITANIC WORKS LINCOLN | ||