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 effect of water flow on a Harrison Twinflow duplex model car heater.
| Identifier | ExFiles\Box 137\1\ scan0202 | |
| Date | 5th December 1936 | |
| HARRISON TWINFLOW CAR HEATER - DUPLEX MODEL EFFECT OF WATER FLOW. FOR DETAILS OF ELEMENT SEE CHART L.631/1 CURVE OBTAINED AT CONSTANT VOLTS = 12. PRESS. DROP ACROSS HEATER IN INS. WATER. B.TH.U's/HR/120°F.{Mr Friese} TEMP. DIFFce AIR IN TO WATER MEAN WATER FLOW GALLS/MIN PRESS. DROP DISSIPATION CLAYTON DEWANDRE & CO LTD TITANIC WORKS LINCOLN JH 5/12/36 | ||